An intraocular implant delivery device

Abstract

The present invention discloses an intraocular implant delivery device, which includes a housing, a main control pull rod assembly, a slider assembly, a striking assembly, a needle retracting turntable and a needle pushing assembly. The main control pull rod assembly, the slider assembly, the striking assembly and the needle retracting turntable are all arranged inside the housing. A through hole is provided at the distal end of the housing, and the needle of the needle pushing assembly passes through the through hole and extends to the outside of the housing. Energy sources capable of selectively releasing energy are arranged on the main control pull rod assembly, the slider assembly and the striking assembly; the main control pull rod assembly is actuated by an operator through a button arranged on the housing, so that a spring drives the main control pull rod assembly to move axially; for the intraocular implant delivery device of the present invention, only one puncture is required to repeatedly deliver implants to the trabecular meshwork of a patient for multiple times, improving the efficiency of the implant surgery and enabling higher implant accuracy of the implants; the present invention can effectively overcome the problems of empty firing of implants or firing two implants at a time caused by low grasping accuracy of the needle pushing.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an intraocular implant delivery device. Background Art

[0002] Glaucoma is the second leading cause of blindness in the world after cataract and is also the first irreversible cause of blindness. The treatment of glaucoma mainly includes three parts: drugs, lasers, and surgery. Among them, surgery has always been a very important treatment method clinically. The traditional common surgical methods include trabeculectomy, which has a relatively large trauma. Therefore, on the basis of traditional surgical operations, the clinical treatment of glaucoma has gradually developed into minimally invasive glaucoma surgery (MIGS). In particular, the emergence of ophthalmic implant devices has provided a safer and more predictable feasible solution for minimally invasive glaucoma surgery, greatly expanding the treatment means of glaucoma surgeons. Minimally invasive glaucoma surgery is suitable for mild to moderate glaucoma and can also intervene in glaucoma at an early stage of onset. Long-term intraocular pressure stability can be achieved after the surgery.

[0003] One type of MIGS surgery is to implant an intraocular implant such as a stent into the trabecular meshwork position to establish an aqueous humor outflow pathway to reduce intraocular pressure. A typical implantation method is to make a corneal incision and use a delivery device with a puncture needle to insert the implant into the desired implantation position. It is known that US9173775B2 discloses a system for delivering multiple intraocular implant systems. This system is actuated by means of a cam and a torsion spring and can sequentially push multiple implants into the desired position in the eye. The energy source of this structural design is a torsion spring. After each implant is pushed, the energy source will decay. The energy when pushing the second implant is significantly less than that when pushing the first implant. Therefore, the number of implants that this structure can push is limited, generally only two. To achieve precise delivery of the implant in the present invention, it is necessary to ensure that the distance that the distal end of the push needle retracts to the tail of the implant each time is constant. The size of the implant is very small, only within 0.5 mm. Even a very small deviation will affect the delivery accuracy. Therefore, the manufacturing process requirements are very high. In the existing cam design, when assembling, a hole needs to be drilled in a half shell such as the left shell, and the left shell is first fixed on the centering pin through the hole. Then the cam is passed through the centering pin and fixed, and other components are assembled. Since a clearance needs to be reserved for the hole-shaft fit, when the right shell is docked and assembled with the left shell, the hole-shaft fit of the cam will cause axial swing, resulting in misalignment of the distance design at the front end of the push needle assembly, which will affect the accuracy of the push needle front end to grasp the implant and is prone to defects such as dry fire or firing two implants at once. Summary of the Invention

[0004] The object of the present invention is to provide an intraocular implant injector that can solve the foregoing problems in view of the problems in the prior art described in the background art. After each implant is pushed by the existing intraocular implant injector, the energy of the torsion spring will decay, resulting in insufficient energy for subsequent implant pushing and inability to push implants multiple times. Moreover, due to the manufacturing process of the injector, the swing caused by the hole-shaft fit of the cam will affect the reliability of the front-end push needle of the injector when grasping the implant, and problems such as dry fire or firing two implants at once may occur.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: An intraocular implant injector, characterized in that it includes a housing, a main control pull rod assembly, a slider assembly, a striking assembly, a needle retracting turntable, and a push needle assembly. The main control pull rod assembly, the slider assembly, the striking assembly, and the needle retracting turntable are all arranged inside the housing. A through hole is provided at the distal end of the housing, and the push needle of the push needle assembly passes through the through hole and extends to the outside of the housing. An energy source capable of selectively releasing energy is provided on each of the main control pull rod assembly, the slider assembly, and the striking assembly;

[0006] The main control pull rod assembly is actuated by an operator through a button provided on the housing, so that the energy source drives the main control pull rod assembly to move axially;

[0007] The slider assembly is longitudinally adjacent to the main control pull rod. A plurality of convex blocks are provided on the side surface of the main control pull rod facing the slider assembly. When the button is pressed and the main control pull rod moves axially, the convex blocks can push the slider assembly to move longitudinally away from the button. When the convex blocks move away from the slider along with the main control pull rod, the energy source pushes the slider assembly to move longitudinally towards the button to return to the initial position;

[0008] The needle retracting turntable is arranged on one side of the distal end of the slider assembly. A plurality of levels of limiting steps are provided on the side surface of the needle retracting turntable facing the push needle assembly. A driving member for driving the needle retracting turntable to rotate is provided on the slider assembly. When the slider assembly moves longitudinally away from the button, the driving member drives the needle retracting turntable to rotate by an angle corresponding to one step, so that the push needle of the push needle assembly retracts proximally by a distance of one step;

[0009] The striking assembly is arranged on one side of the proximal end of the slider assembly. When the slider assembly is in the initial position, the energy source connected to the striking assembly is in an energy storage state. When the slider assembly moves longitudinally away from the button, the striking assembly moves distally under the push of the energy source along the guiding surface of the slider assembly to strike the push needle assembly;

[0010] The needle pushing assembly is arranged on the distal side of the needle retracting turntable. At least one implant is accommodated inside the needle pushing component. An elastic claw is provided at the distal end of the needle pushing component. When the needle pushing component retracts towards the proximal end, the elastic claw opens when passing through the implant, so that the elastic claw moves from the head of the implant to the tail of the implant. When the striking component strikes the needle pushing assembly, the needle pushing assembly drives the needle pushing component to move towards the distal end of the housing, and pushes the implant to be delivered to the implant site of the patient.

[0011] As a further optimization of the above solution, the energy source is a spring, a motor, a magnetic iron or an elastomer.

[0012] As a further optimization of the above solution, the main control pull rod assembly includes a main control pull rod and a spring. The spring is an energy source connected to the main control pull rod. One end of the spring is fixed on the main control pull rod, and the other end is fixed on the housing. When the button is in the initial position, the button forms a limit on the main control pull rod. At this time, the spring is in an energy storage state. When the button is pressed, the spring pushes the main control pull rod to move axially towards the proximal or distal direction.

[0013] As a further optimization of the above solution, multiple groups of first limit blocks and second limit blocks are provided on the side of the main control pull rod away from the slider assembly. The first limit blocks and the second limit blocks are arranged alternately and are used to limit the main control pull rod when the button is pressed and released. The width of the convex block corresponds to the distance between adjacent first limit blocks.

[0014] As a further optimization of the above solution, the button actuates the main control pull rod through a lever and a return spring. A shaft hole is provided in the middle of the lever. A fixed shaft is provided inside the housing. The fixed shaft passes through the shaft hole on the lever. One end of the lever corresponds to the position of the button, and the other end of the lever is connected to the return spring. A positioning block is provided on the lever, and the positioning block is used to limit the main control pull rod.

[0015] As a further optimization of the above solution, the slider assembly includes a slider and a spring. The spring is an energy source connected to the slider. The slider includes side plates and two guide plates extending vertically outwards from the side plates. The two guide plates are arranged at intervals, and guide curved surfaces are respectively provided on the opposite surfaces of the two guide plates. A through hole corresponding to the striking component is provided on the side plate of the slider where the driving member is arranged.

[0016] As a further optimization of the above solution, an element magnetically coupled with the driving member is provided on the needle retracting turntable. When the slider assembly moves longitudinally away from the button, under the action of magnetic force, the driving member pushes the needle retracting turntable to rotate by an angle corresponding to one step, so that the needle of the needle pushing assembly retracts axially towards the proximal end by a distance corresponding to one step.

[0017] As a further optimization of the above solution, the driving member is an elastic dial. A number of dial blocks are provided on the needle-retracting turntable, and the dial blocks are distributed on the needle-retracting turntable at a set circumferential pitch. When the slider assembly moves longitudinally away from the button, the elastic dial on the slider assembly toggles the dial block to move, driving the needle-retracting turntable to rotate by an angle corresponding to one step, so that the pusher needle of the pusher needle assembly retracts axially towards the proximal end by a distance corresponding to one step.

[0018] As a further optimization of the above solution, the striking assembly includes a striking head and a spring limiting portion. A spring is provided between the spring limiting portion and the housing. A guiding and limiting block is provided on the striking head. When the slider assembly slides longitudinally away from the button, the guiding and limiting block slides along the guiding curved surface, causing the striking head to move towards the distal end to strike the pusher needle assembly. When the slider assembly slides longitudinally towards the button, the guiding curved surface pushes the striking head towards the proximal end and stores energy in the spring.

[0019] As a further optimization of the above solution, a guiding strip is provided at the lower part of the spring limiting portion, and a corresponding axial guiding groove is provided in the housing. The guiding strip is in sliding fit with the axial guiding groove.

[0020] As a further optimization of the above solution, the pusher needle assembly includes a pusher needle, a pusher needle mounting seat and a spring. The pusher needle is fixed on the pusher needle mounting seat. A retaining wall for fixing the spring is provided on the housing. The spring is sleeved on the pusher needle and is connected between the pusher needle fixing seat and the retaining wall. The pusher needle mounting seat abuts against the step of the needle-retracting turntable. When the needle-retracting turntable rotates, the spring pushes the pusher needle mounting seat to move axially towards the proximal end, driving the pusher needle to move from the head of the implant to the tail of the implant; when the striking assembly moves towards the distal end, it strikes the pusher needle mounting seat to push the pusher needle to strike the implant.

[0021] As a further optimization of the above solution, a puncture needle assembly is further included. The puncture needle assembly is used to form an incision in the eye tissue; a sliding button is further provided on the housing, and the sliding button is used to control the puncture needle assembly to retract towards the proximal end.

[0022] It should be noted that the descriptions of directions such as up, down, left, right, front, and back in the above solution are only for the convenience of understanding the solution of the present invention, and are not intended to limit the protection scope of the present invention. When the placement direction of the intraocular implant delivery device is different, these directions will change synchronously. The orientation in the above solution is described based on the orientation of the operator holding the intraocular implant during the operation. The distal end refers to the direction away from the operator or towards the eye tissue, and the proximal end refers to the direction towards the operator or away from the eye tissue.

[0023] The present invention has positive effects:

[0024] 1) The intraocular implant delivery device of the present invention mainly realizes the implantation operation of the intraocular implant through the main control pull rod assembly, the slider assembly, the striking assembly and the push needle assembly. According to the needs of the implantation surgery, the implant can be repeatedly delivered to the trabecular meshwork of the patient, improving the efficiency of the implantation surgery. Moreover, only one puncture is required to complete the implantation surgery, enabling higher implantation accuracy of the implant.

[0025] 2) The intraocular implant delivery device of the present invention uses the energy source connected to the main control pull rod as a total energy source. Through the main control pull rod, the total energy source is orderly and constantly configured to the sliding assembly and the striking assembly that need to be driven, ensuring that the striking assembly can deliver a constant energy to the implant each time. Compared with the existing technology where the delivery force gradually decays, it can ensure that the implant can be delivered multiple times according to the surgical needs, and extremely high accuracy can be achieved each time the implant is delivered.

[0026] 3) The intraocular implant delivery device of the present invention controls the retraction distance of the push needle assembly through the retraction needle turntable, ensuring that the retraction distance of each push needle is just adapted to the size of an implant, so that the elastic claws at the distal end of the push needle can accurately move to the tail of a to-be-delivered implant each time. Through this high-precision retraction needle design, it can effectively overcome the problems of empty firing of the implant or firing two implants at once caused by low grasping accuracy of the push needle in the existing technology, further improving the accuracy and safety of the intraocular implant surgery.

[0027] 4) In the present invention, through the axial movement of the main control pull rod, the longitudinal movement of the slider assembly is driven, and then the axial movement of the striking assembly is driven. These movements are all linear movements, which can further improve and ensure the accuracy and reliability of the implant delivery.

[0028] 5) When the intraocular implant delivery device of the present invention is used to deliver the intraocular implant, pressing the button once can implant one implant, with simple operation and high reliability. Description of the Drawings

[0029] Figure 1 It is a schematic diagram of the overall structure of the intraocular implant delivery device according to Embodiment 1 of the present invention.

[0030] Figure 2 It is an exploded structure schematic diagram of the intraocular implant delivery device according to Embodiment 1 of the present invention.

[0031] Figure 3 It is a schematic diagram of the left housing structure of the intraocular implant delivery device according to Embodiment 1 of the present invention.

[0032] Figure 4 It is a schematic diagram of the internal structure of the intraocular implant delivery device according to Embodiment 1 of the present invention.

[0033] Figure 5Schematic diagram of the internal structure of the intraocular implant injector for Embodiment 1 of the present invention (viewed from a top-down perspective).

[0034] Figure 6 Schematic diagram of the internal structure of the intraocular implant injector for Embodiment 1 of the present invention (removing the puncture needle assembly).

[0035] Figure 7 Schematic diagram of the structure of the main control pull rod.

[0036] Figure 8 Schematic diagram of the lever structure.

[0037] Figure 9 Schematic diagram of the structure of the slider assembly for Embodiment 1.

[0038] Figure 10 Schematic diagram of the B-B cross-sectional view of the slider.

[0039] Figure 11 Schematic diagram of the structure of the needle retraction turntable (viewed from the distal end perspective);

[0040] Figure 12 Schematic diagram of the structure of the needle retraction turntable (viewed from the proximal end perspective);

[0041] Figure 13 Schematic diagram of the structure of the striking assembly.

[0042] Figure 14 Schematic diagram of the structure of the needle pushing assembly.

[0043] Figure 15 Partial enlarged schematic diagram of part A of the needle pushing assembly.

[0044] Figure 16 Schematic diagram of the elastic claw of the needle pushing component retracting from the head to the tail of the implant.

[0045] Figure 17 Schematic diagram of the structure of the puncture needle assembly.

[0046] Figure 18 Partial enlarged internal cross-sectional view of the intraocular implant injector for Embodiment 1 when the button is in the initial state.

[0047] Figure 19 Partial enlarged internal cross-sectional view of the intraocular implant injector for Embodiment 1 when the button is pressed.

[0048] Figure 20 Schematic diagram of the structure of the slider assembly for Embodiment 2.

[0049] Figure 21 Schematic diagram of the structure of the needle retraction turntable for Embodiment 2.

[0050] The reference numerals in the figure are as follows: housing 1, right housing 11, left housing 12, push needle guiding and limiting member 121, sliding groove 122, needle retracting turntable assembly seat 123, front guiding and limiting plate 124, rear guiding and limiting plate 125, axial guiding groove 126, first limiting rib 127, second limiting rib 128, through hole 13; puncture needle assembly 2, puncture needle assembly seat 21, limiting groove 211, elastic limiting portion 212, puncture needle 22, tension spring 23, sliding button 24; push needle assembly 3, push needle 31, push needle assembly seat 32, striking portion 321, limiting portion 322, compression spring 33, implant positioning rod 34, limiting portion 35, elastic claw 36, button 4, lever 41, return spring 42, positioning block 43, main control pull rod assembly 5, main control pull rod 51, first limiting block 511, second limiting block 512, convex block 513, tension spring 52, slider assembly 6, slider 61, side plate 611, guiding plate 612, guiding curved surface 613, through hole 614, spring positioning portion 615, compression spring 62, driving member 63, magnetic block 631, elastic dial 632, striking assembly 7, striking head 71, guiding and limiting block 711, spring limiting portion 72, guiding strip 721, spring 73, needle retracting turntable 8, limiting step 81, iron ring 82, dialing block 83, implant 9. Detailed implementation manners

[0051] The technical solutions of the present invention will be clearly and completely described below through embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] In the description of the present application, it should be understood that the orientation or positional relationship involved in the orientation description, such as up, down, front, back, left, right, etc., is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present application.

[0053] In the description of the embodiments of the present application, the meaning of several is one or more, and the meaning of multiple is two or more. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0054] In the description of the embodiments of the present application, unless otherwise clearly defined, terms such as "set", "installed", and "connected" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present application in combination with the specific content of the technical solution.

[0055] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The embodiments will be described in detail below with reference to the accompanying drawings.

[0056] In each embodiment of the present application, the distal end refers to the direction away from the operator or the direction towards the eye tissue, and the proximal end refers to the direction towards the operator or the direction away from the eye tissue.

[0057] First, a general description of the embodiments of the present invention will be given below.

[0058] An intraocular implant delivery device of the present invention includes a housing 1, a main control pull rod assembly 5, a slider assembly 6, a striking assembly 7, a needle retracting turntable 8, and a needle pushing assembly 3. The main control pull rod assembly 5, the slider assembly 6, the striking assembly 7, and the needle retracting turntable 8 are all arranged in the housing 1. A through hole 13 is provided at the proximal end of the housing 1, and the needle pusher 31 of the needle pushing assembly 3 passes through the through hole 13 and extends to the outside of the housing 1. Energy sources capable of selectively releasing energy are provided on the main control pull rod assembly 5, the slider assembly 6, and the striking assembly 7.

[0059] The main control pull rod assembly 5 is actuated by the operator through a button 4 provided on the housing 1, so that the energy source drives the main control pull rod assembly 5 to move axially.

[0060] The slider assembly 6 is longitudinally adjacent to the main control pull rod 51. A plurality of protrusions 513 are provided on the side surface of the main control pull rod 51 facing the slider assembly 6. When the button is pressed and the main control pull rod 51 moves axially, the protrusions 513 can push the slider assembly 6 to move longitudinally away from the button 4. When the protrusions 513 move away from the slider 61 along with the main control pull rod 51, the energy source pushes the slider assembly 6 to move longitudinally towards the button 4 to the initial position.

[0061] The needle retracting turntable 8 is arranged on the distal side of the slider assembly 6. A plurality of levels of limiting steps 81 are provided on the side surface of the needle retracting turntable 8 facing the needle pushing assembly 3. A driving member 63 for driving the needle retracting turntable 8 to rotate is provided on the slider assembly 6. When the slider assembly 6 moves longitudinally away from the button, the driving member 63 drives the needle retracting turntable 8 to rotate by an angle corresponding to one step, so that the needle pusher 31 of the needle pushing assembly 3 retracts proximally by a distance corresponding to one step.

[0062] The striking assembly 7 is disposed on the proximal side of the slider assembly 6. When the slider assembly 6 is in the initial position, the energy source 73 connected to the striking assembly 7 is in the energy storage state. When the slider assembly 6 moves longitudinally away from the button, the striking assembly 7 moves distally along the guiding surface 613 of the slider assembly 6 under the push of the energy source 73 to strike the push pin assembly 3.

[0063] The push pin assembly 3 is disposed on the distal side of the needle retracting turntable 8. At least one implant 9 is accommodated inside the push pin 31. An elastic claw 36 is provided at the distal end of the push pin 31. When the push pin 31 retracts proximally, the elastic claw 36 opens when passing by the implant 9, so that the elastic claw 36 moves from the head of the implant 9 to the tail of the implant; when the striking assembly 7 strikes on the push pin assembly 3, the push pin assembly 3 drives the push pin 31 to move distally towards the housing 1, and pushes the implant 9 to be delivered to the implant site of the patient.

[0064] Specifically, the energy source capable of selectively releasing energy in the present invention means that the energy source can be in the energy storage state or the energy release state according to various different working states. The energy source can be selected from a spring, a motor, a magnetic iron or an elastomer.

[0065] More specifically, in an embodiment, a spring is used as the mechanism for storing and releasing energy. A first spring is connected to the main control pull rod 51, a second spring is connected to the slider assembly 6, and a third spring is connected to the striking assembly 7. The first spring can be selected from a tension spring or a compression spring, the second spring can be selected from a tension spring or a compression spring, and the third spring can be selected from a tension spring or a compression spring, and is selected according to the actual layout in the housing 1. Further, whether the main control pull rod assembly 5 moves distally or proximally in the axial direction is related to whether the first spring is a tension spring and the position of the first spring. For example, if the first spring is a tension spring and the tension spring is located on the proximal side of the main control pull rod, the main control pull rod assembly moves proximally in the axial direction. This axial direction is parallel to the axis of the push pin.

[0066] From the perspective of the operator holding the intraocular implant delivery device, the button 4 is located at the upper part of the housing 1, the slider assembly 6 is located below the main control pull rod assembly 5, and the striking assembly 7, the slider assembly 6, the needle retracting turntable 8, and the needle pushing assembly 3 are arranged in sequence from right to left in the axial direction. The upward movement of the slider assembly 6 in the longitudinal direction is a movement in the longitudinal direction towards the button 4, and the downward movement of the slider assembly 6 in the longitudinal direction is a movement in the longitudinal direction away from the button. Of course, in another embodiment, if the button 4 is located at the lower part of the housing 1, then the slider assembly 6 is located above the main control pull rod assembly 6, and the striking assembly 7, the slider assembly 6, the needle retracting turntable 8, and the needle pushing assembly 3 are arranged in sequence from right to left in the axial direction. At this time, when the button 4 is pressed, the slider assembly 6 moves upward in the longitudinal direction, and when the button 4 is reset, the slider assembly 6 moves downward in the longitudinal direction. The upward movement of the slider assembly 6 in the longitudinal direction is a movement in the longitudinal direction away from the button, and the downward movement of the slider assembly 6 in the longitudinal direction is a movement in the longitudinal direction towards the button 4.

[0067] The main control pull rod 51 is actuated by the button 4. When the button 4 is pressed, the main control pull rod 51 moves linearly along the axis under the action of the first spring. A convex block 513 is provided on the side surface of the main control pull rod 51 facing the slider assembly 6. The convex block 513 pushes the slider assembly 6 to move linearly downward in the longitudinal direction. The convex block 513 is a protrusion with a certain designed contour surface, and can be selected as shapes such as triangular, semi-circular, semi-elliptical, arc-shaped, trapezoidal, etc.

[0068] Assume the height of the convex block 513 is h. When the slider assembly 6 moves downward along the trajectory of the convex block 513, first, the driving member 63 on the slider assembly 6 causes the rotation of the needle retracting turntable 8. The driving member 63 drives the needle retracting turntable 8 to rotate by an angle corresponding to one step, that is, when the downward movement distance of the slider assembly 6 is less than h, the needle retracting turntable 8 has already rotated in place; a plurality of levels of limiting steps 81 are provided on the side surface of the needle retracting turntable 8 facing the needle pushing assembly 3. The plurality of levels of limiting steps 81 can be bilaterally distributed along the entire circumference or unilaterally distributed along a semi-circumference. The steps within one cycle are arranged from high to low in sequence. The height setting of adjacent steps, the width setting of each step, and the angle of rotating one step, etc., are related to the retracting distance of the needle pusher 31 and the length of the implant 9.

[0069] In the initial position, the needle pushing assembly 3 abuts against the high step of the needle retracting turntable 8. When the slider assembly 6 moves downward, the needle retracting turntable 8 rotates to make the needle pushing assembly 3 fall onto the low step, thereby realizing the retraction of the needle pushing assembly 3 in the axial direction. The elastic claw 36 of the needle pusher 31 moves from the head of the implant 9 to the tail of the implant 9, and the elastic claw 36 abuts against the tail of the implant 9.

[0070] In the initial position, the third spring of the striking assembly 7 is in an energy storage state. When the slider assembly 6 moves downward, the striking assembly 7 moves distally under the push of the third spring along the guiding surface 613 of the slider assembly 6. As the slider assembly 6 continues to move downward to a distance of h, the slider assembly 6 is at the highest point of the bump 513, and the striking assembly 7 is at the farthest position axially, just contacting the impact push pin assembly 3. The push pin assembly 3 drives the push pin 31 to move toward the distal end of the housing 1, pushing the implant 9 to the implantation site of the patient.

[0071] Through the above process of first retracting and then striking, the intraocular delivery of an implant is completed, and this process is a coherent one. When the button 4 is released, the slider assembly 6 moves upward along the bump 513 to the initial state; when the slider assembly 6 moves upward, due to the block of the high step of the needle retraction turntable 8, the needle retraction turntable 8 cannot rotate, and the push pin assembly 3 will not move along the axis; the striking assembly 7 moves proximally axially along the guiding surface 613 on the slider assembly 6 back to the initial state to prepare for the delivery of the next implant.

[0072] In the above process, the main control pull rod assembly 5 only moves linearly axially and will not move up and down; the slider assembly 6 only moves linearly longitudinally and will not move left and right; the striking assembly 7 only moves linearly axially and will not move up and down. This kind of limiting and linear movement improves and ensures the accuracy and reliability of the implant delivery. Specifically, this kind of limiting can be achieved by setting a limiting mechanism on the housing 1, or by setting corresponding guiding strips and sliding grooves on the assembly and the housing, or by other additional mechanisms.

[0073] The implant of the present invention can be an implant with a central through hole. The implant is delivered to the trabecular meshwork position to establish an aqueous humor outflow pathway between the anterior chamber and the Schlemm's canal, thereby reducing the elevated intraocular pressure. According to the actual surgical needs, by forming an incision in the eye tissue and placing the distal end of the push pin at the trabecular meshwork position, the number of implants delivered can be one, two, three, four or more.

[0074] The number of bumps 513 and the number of steps of the limiting step 81 on the needle retraction turntable 8 are set according to the maximum number of implants 9. The first spring connected to the main control pull rod 51 is used as the total energy source, and the second spring and the third spring are secondary energy sources. The secondary energy sources are kept constant by the attenuation of the total energy source. If the total energy source is large enough, it can be considered that the number of implants that the conveyor can implant is infinite.

[0075] A plurality of implants 9 are accommodated in the push needle 31. The distal end of the push needle 31 is provided with elastic claws 36. The retraction and advancement of the elastic claws 36 are used to achieve the delivery of the plurality of implants. The push needle 31 of the push needle assembly 3 is a hollow needle. An implant positioning rod 34 is provided in the push needle 31, and a limiting portion 35 is provided on the implant positioning rod 34. The distal end of the push needle 31 is provided with elastic claws 36. The setting scheme of the elastic claws 36 can select a suitable elastic claw according to the shape of the implant. For example, at least two axial grooves can be provided at the distal end of the push needle. These grooves divide the distal end of the push needle into at least two parts, that is, at least two claws. The material of the distal end of the push needle 31 is an elastic material. When the push needle is retracted to the head of the implant, the elastic claws 36 will automatically open along the outer surface of the implant until the elastic claws move to the tail of the implant, and the elastic claws will automatically close under the action of elastic force. When the striking head of the striking assembly 7 strikes the push needle assembly 3, the push needle assembly 3 drives the push needle 31 to move towards the distal end of the housing 1, and pushes the implant 9 to be delivered to the implant site of the patient.

[0076] If the number of implants 9 is one, the convex block 513 on the main control pull rod assembly 5 can be set to only one. The button 4 is arranged on the housing 1 and extends to the outside. The button 4 can actuate and release the main control pull rod assembly 5 through the return spring 42.

[0077] If the number of implants 9 is more than two, multiple groups of first limit blocks 511 and second limit blocks 512 can be provided on one side surface of the main control pull rod 51 away from the slider assembly 6. The first limit blocks 511 and the second limit blocks 512 are arranged alternately and are used to limit the main control pull rod 51 when the button 4 is pressed and released; the width of the convex block 513 corresponds to the distance between the adjacent first limit blocks 511. Specifically, the button 4 can actuate the main control pull rod 51 through the lever 41 and the return spring 42. A shaft hole is provided in the middle of the lever 41. A fixed shaft is provided in the housing 1, and the fixed shaft passes through the shaft hole on the lever 41. One end of the lever 41 corresponds to the position of the button 4, the other end of the lever 41 is connected to the return spring 42, and a positioning block 43 is provided on the lever 41. The positioning block 43 is used to limit the main control pull rod 51.

[0078] Before the operation, an incision is formed in the eye tissue. After the incision is made in the cornea through other surgical instruments, the push needle 31 of the delivery device of the present invention can be delivered to the trabecular meshwork position; or after the incision is formed in advance, through the puncture needle assembly 2 provided in the delivery device of the present invention, the puncture needle assembly 2 is used to puncture an incision in the cornea and enter the trabecular meshwork position to protect the push needle 31 and the implant 9 before delivering the implant 9. When delivering, the puncture needle assembly 2 needs to be retracted to expose the push needle 31. The slide button 24 provided on the housing 1 can be used. The slide button 24 is coupled with the puncture needle assembly 2, and sliding the slide button 24 retracts the puncture needle assembly 2 in the proximal direction.

[0079] The following will be described in conjunction with the accompanying drawings and specific embodiments.

[0080] Embodiment 1

[0081] As Figure 1-19 shown, an intraocular implant delivery device includes a housing 1, a puncture needle assembly 2, a push needle assembly 3, a main control pull rod assembly 5, a slider assembly 6, a striking assembly 7, and a needle retracting turntable 8. Part of the push needle assembly 3, part of the puncture needle assembly 2, the main control pull rod assembly 5, the slider assembly 6, the striking assembly 7, and the needle retracting turntable 8 are all arranged inside the housing 1. A button 4 and a sliding knob 24 are arranged on the housing 1.

[0082] As Figure 1 and Figure 2 shown, the housing 1 includes a left housing 12 and a right housing 11. The left housing 12 and the right housing 11 are fixedly connected, and the connection method can be snap connection, screw connection, bonding, or other fixed connection methods.

[0083] A through hole 13 is provided at the distal end of the housing 1. The puncture needle 22 of the puncture needle assembly 2 passes through the through hole 13 and extends to the outside of the housing 1. The push needle 31 of the push needle assembly 3 passes through the inner hole of the puncture needle 22 and extends to the outside of the housing 1.

[0084] As Figure 3 shown, several push needle guiding and limiting members 121 are also provided inside the left housing 12. The push needle guiding and limiting members 121 can be support limiting columns. An axial limiting groove is provided in the middle of the support limiting column, and the width of the limiting groove is adapted to the outer diameter of the push needle. The push needle guiding and limiting members 121 can also be guiding and limiting plates. Limiting grooves are provided on the guiding and limiting plates, and the width of the limiting grooves is adapted to the outer diameter of the push needle. The number of the push needle guiding and limiting members can be designed according to needs. For example, in the embodiment shown in the accompanying drawings, a total of two support limiting columns and one guiding and limiting plate are provided. The guiding and limiting plate is arranged between the two support limiting columns, and the limiting grooves on the support limiting columns and the limiting grooves on the guiding and limiting plate are on the same straight line, ensuring that the push needle can only move linearly along the axis and improving the implantation accuracy of the implant.

[0085] A chute 122 corresponding to the slider 61 of the slider assembly 6 is also provided inside the left housing 12. The slider 61 is slidably matched with the chute 122.

[0086] A needle retracting turntable mounting seat 123 is also provided inside the left housing 12. The needle retracting turntable mounting seat 123 includes a mounting plate and a mounting shaft. The mounting plate is fixedly connected to the housing 1. The mounting shaft is arranged on the distal side surface of the mounting plate. A through hole is provided in the middle of the mounting plate and the mounting shaft, and this through hole is used for the passing of the striking head 71 of the striking assembly 7 and the striking part 321 of the push needle assembly 3, enabling the striking head 71 to smoothly strike the striking part 321 of the push needle assembly 3.

[0087] The left housing 12 is also provided with a front guiding and limiting plate 124 and a rear guiding and limiting plate 125 for limiting the pushing needle assembly 3. The front guiding and limiting plate 124 and the rear guiding and limiting plate 125 are respectively arranged on the front and rear sides of the pushing needle assembly seat 32 of the pushing needle assembly 3, so that the pushing needle assembly seat 32 can only move axially, preventing the radial movement of the pushing needle 31 and improving the accuracy of the implant implantation operation.

[0088] As Figure 6 and Figure 7 shown, the main control pull rod assembly 5 includes a main control pull rod 51 and a spring. The spring can be a tension spring 52 with sufficient elastic force. The distal end of the tension spring 52 is fixedly connected to the main control pull rod. The right end of the tension spring is fixed on the spring fixing column in the housing 1. The main control pull rod 51 is strip-shaped. A plurality of groups of first limiting blocks 511 and second limiting blocks 512 are arranged on the upper side surface of the main control pull rod 51, and the first limiting blocks 511 and the second limiting blocks 512 are arranged alternately; the first limiting block 511 is a limiting block arranged on the upper side surface of the main control pull rod 51, and the second limiting block 512 includes a connecting portion and a limiting portion. The limiting portion is fixedly connected to the upper side surface of the main control pull rod 51 through the connecting portion, and the limiting portion is arranged at a set distance from the upper side surface of the main control pull rod 51. A plurality of bumps 513 are arranged on the lower side surface of the main control pull rod 51, and the width of the bump 513 corresponds to the distance between adjacent first limiting blocks 511.

[0089] In Figure 7 the illustrated embodiment, a total of four bumps 513 are arranged on the lower side surface of the main control pull rod 51. The bump 513 is approximately triangular. Correspondingly, four first limiting blocks 511 and four second limiting blocks 512 are also respectively arranged on the upper side surface of the main control pull rod 51. On the upper side surface of the main control pull rod 51, from right to left, the first limiting blocks 511 and the second limiting blocks 512 are arranged alternately in sequence. As Figure 7 shown, the distance L between adjacent first limiting blocks 511 corresponds to the width D of the bump 513. Through this setting, the delivery of up to four implants 9 can be realized.

[0090] Combined with Figure 2 、 Figure 6 and Figure 8As shown, the button 4 can actuate and limit the main control pull rod 51 through the lever 41 and the return spring 42. The button 4 is arranged on the housing 1. A button opening corresponding to the button 4 is provided on the housing 1. A shaft hole is provided in the middle of the lever 41, and a corresponding fixed shaft is provided in the housing 1. The fixed shaft passes through the shaft hole on the lever 41. The distal end of the lever 41 corresponds to the position of the button 4. The right end of the lever 41 is connected to the return spring 42, and a positioning block 43 is provided on the right side of the lever 41. In the natural state of the button, under the action of the return spring 42 at the right end of the lever 41, the positioning block 43 on the lever 41 forms a limit on the first limit block 511 on the main control pull rod 51. When the button 4 is pressed, the distal end of the lever 41 rotates downward, the right end of the lever 41 rotates upward, the positioning block 43 moves away from the first limit block 511 on the main control pull rod 51 and moves forward to a position corresponding to the second limit block 512. The main control pull rod 51 moves axially toward the proximal end under the pulling force of the tension spring 52. When the second limit block 512 on the main control pull rod 51 moves to the position of the positioning block 43 on the lever 41, the positioning block 43 on the lever 41 forms a limit on the main control pull rod 51 again. When the button 4 is released, the lever 41 resets under the action of the return spring 42, the right end of the lever 41 rotates downward, so that the positioning block 43 moves away from the second limit block 512 on the main control pull rod 51. The main control pull rod 51 continues to move toward the proximal end under the action of the tension spring 52. When the second first limit block 511 moves beside the positioning block 43, the positioning block 43 forms a limit on the first limit block 511 on the main control pull rod 51 again.

[0091] As Figure 9 and Figure 10 shown, the slider assembly 6 is arranged below the main control pull rod 51. The slider assembly 6 includes a slider 61 and a compression spring 62. The slider 61 includes side plates 611 and two guide plates 612 extending vertically outward from the side plates. The two guide plates 612 are arranged at intervals, and guide curved surfaces 613 are respectively provided on the opposite surfaces of the two guide plates 612. A through hole 614 corresponding to the striking assembly 7 is provided on the side plate 611 between the two guide plates 612. A spring positioning portion 615 is provided below the slider 61, and a compression spring 62 is provided between the spring positioning portion 615 and the housing 1. A driving member 63 is provided on one side of the through hole 614 of the side plate 611.

[0092] As Figures 11-12 shown, the needle retracting turntable 8 is arranged on the distal side of the slider assembly 6, and the needle retracting turntable 8 is rotatably arranged in the housing 1. A plurality of levels of limit steps 81 are provided on the distal side surface of the needle retracting turntable 8. A driving member 63 for driving the needle retracting turntable 8 to rotate is provided on the side plate 611 of the slider assembly 6. When the slider assembly 6 moves downward, the driving member 63 drives the needle retracting turntable 8 to rotate by an angle corresponding to one step, so that the push needle 31 of the needle pushing assembly 3 moves toward the proximal end by a distance of one step.

[0093] According to the design requirements, the driving member 63 can adopt a variety of implementation schemes. There are elements interacting with the driving member 63 on the needle retracting turntable 8. This interaction can be a non-contact magnetic coupling method or a contact mechanical method. When the magnetic coupling method is adopted, if the driving member 63 is a magnet, there are elements made of magnetic or paramagnetic materials that are attracted by the magnet on the needle retracting turntable. If the driving member 63 is an element made of magnetic or paramagnetic materials that are attracted by the magnet, then there is a magnet on the needle retracting turntable 8.

[0094] In this embodiment, the driving member 63 can be selected as the magnetic block 631. Correspondingly, an iron ring 82 is provided on the side of the needle retracting turntable 8 facing the side plate 611. The iron ring 82 is embedded in the needle retracting turntable 8. When the slider assembly 6 moves downward, the magnetic block 631 attracts the iron ring 82 to generate an eccentric force, pushing the needle retracting turntable 8 to rotate by an angle corresponding to one step, so that the needle pushing assembly 3 drops from the high step to the low step, causing an axial movement in the proximal direction.

[0095] The limiting step 81 on the needle retracting turntable 8 is arranged along the arc direction of the needle retracting turntable 8. When the needle retracting turntable 8 rotates as the slider 61 moves downward, when the slider 61 moves upward during reset, the striking part 321 of the needle pushing assembly 3 abuts against the high step part of the needle retracting turntable 8 again, forming a limit for the needle retracting turntable 8 so that it cannot rotate as the slider 61 moves.

[0096] As Figure 13 shown, the striking assembly 7 is arranged on the proximal side of the slider assembly 6. The striking assembly 7 includes a striking head 71 and a spring limiting part 72. The distal end of the spring 73 abuts against the spring limiting part 72 of the striking assembly 7, and the right end of the spring 73 abuts against the spring limiting part 72 in the housing 1. In order to enable the striking assembly 7 to move only along the axial direction, the spring limiting part 72 is provided with a guiding strip 721, and a corresponding axial guiding groove 126 is provided in the housing 1. The guiding strip 721 is in sliding fit with the axial guiding groove 126. The striking head 71 can be set as a rod shape, and guiding and limiting blocks 711 are provided on the left and right side surfaces of the striking head 71. When the slider assembly 6 slides downward, the guiding and limiting blocks 711 slide along the guiding curved surface 613 on the slider assembly 6, causing the striking head 71 to move in the distal direction to strike the needle pushing assembly 3. When the slider assembly 6 slides upward, the guiding curved surface 613 on the slider assembly 6 pushes the striking head 71 to move in the proximal direction and compresses the spring 73 to store energy.

[0097] As Figure 14As shown, the push pin assembly 3 includes a push pin 31, a push pin mounting seat 32, and a compression spring 33. The proximal end of the push pin mounting seat 32 is provided with a striking portion 321. On both sides of the striking portion 321 of the push pin mounting seat 32, there are limiting portions 322 that cooperate with the needle withdrawal turntable 8. The push pin 31 is fixed on the push pin mounting seat 32. Since the push pin 31 is relatively long, several structures for fixing the push pin 31 are also provided on the housing 1 to prevent the push pin from shaking and achieve precise axial movement.

[0098] A retaining wall is also provided on the housing 1. The compression spring 33 is sleeved on the push pin 31 and is located between the push pin mounting seat 32 and the retaining wall. In the initial state, the compression spring 33 is pre-compressed between the push pin mounting seat 32 and the gear position wall. That is to say, the compression spring 33 is always compressed, and the retaining wall of the housing is stationary. Then, the compression spring 33 always has a pressure towards the proximal end to tightly press the push pin mounting seat 32 against the needle withdrawal turntable 8. When the needle withdrawal turntable 8 rotates by an angle of one step, the push pin mounting seat 32 will perform a retraction action towards the proximal end under the action of the spring force, moving the elastic claw 36 at the distal end of the push pin 31 from the head 91 of the implant 9 to the tail 92 of the implant 9.

[0099] Specifically, in this embodiment, as Figures 15-16 shown, the push pin 31 is a hollow needle. An implant positioning rod 34 is provided inside the push pin 31. A limiting portion 322 is provided on the implant positioning rod 34. The distal end of the push pin 31 is provided with an elastic claw 36. When the push pin 31 retracts, the elastic claw 36 opens when passing through the implant 9, so that the elastic claw 36 moves from the head 91 of the implant 9 on the implant positioning rod 34 to the tail 92 of the implant 9; when the striking head 71 of the striking assembly 7 strikes the push pin assembly 3, the push pin assembly 3 drives the push pin 31 to move towards the distal end of the housing 1, pushing the implant 9 to be delivered to the implant site of the patient.

[0100] As Figure 17 shown, the puncture needle assembly 2 includes a puncture needle mounting seat 21 and a puncture needle 22. The puncture needle mounting seat 21 is arranged inside the housing 1, and the puncture needle 22 is fixedly connected to the distal end of the puncture needle mounting seat 21. The puncture needle assembly 2 further includes a tension spring 23. The tension spring 23 is connected between the proximal end of the puncture needle mounting seat 21 and a tension spring fixing column inside the housing 1. A limiting groove 211 is provided on the puncture needle mounting seat 21, and a sliding button 24 corresponding to the limiting groove 211 is provided on the housing 1. The sliding button 24 is used to control the retraction of the puncture needle assembly 2. The sliding button 24 covers the outer surface of the button 4, playing a protective role for the button 4 to avoid accidental triggering of the button 4. Only when the sliding button 24 slides to retract the puncture needle assembly 2, will the button 4 be exposed, so as to operate the button 4.

[0101] The puncture needle assembly base 21 is arranged above the needle pushing assembly 3. The needle pusher 31 passes through the inner hole of the puncture needle 22 and extends to the outside of the housing 1. An elastic limiting part 212 is provided at the right end of the puncture needle assembly base 21. Inside the housing 1, a first limiting rib 127 and a second limiting rib 128 are provided on the right side of the elastic limiting part 212, and the second limiting rib 128 is arranged on the right side of the first limiting rib 127. The axial limit of the puncture needle 22 can be formed by the sliding button 24.

[0102] Review again Figures 15-16 , the intraocular implant delivered by the intraocular implant delivery device of the present invention includes a disc-shaped tail 92, a cylindrical part, and a conical head 91. The cylindrical part is arranged between the tail 92 and the head 91. From the end of the head 91 to the connection part with the cylindrical part, the diameter of the head 91 gradually increases, and the diameter of the cylindrical part is smaller than that of the head 91. Axial holes are provided in the tail 92, the cylindrical part, and the head 91, and a radial through hole is provided on the head 91, and the axial through hole communicates with the radial through hole.

[0103] The size of the intraocular implant of the present invention is very small. For example, for a commonly used intraocular implant, its length is 0.36 mm. Therefore, even a very small precision difference may lead to the failure of the eye implantation surgery. Therefore, it is necessary to ensure the implantation accuracy of the intraocular implant delivery device.

[0104] For the intraocular implant delivery device of this embodiment, the specific operation process during the operation is as follows.

[0105] Before leaving the factory, the required number of intraocular implants 9 are put on the implant positioning rod 34 and pushed to the limiting part 35 of the implant positioning rod 34. Then, the implant positioning rod 34 is inserted into the inner hole of the needle pusher 31. The elastic claw 36 at the distal end of the needle pusher 31 can limit the implant 9 to prevent the implant 9 from falling out. Then, the needle pushing assembly 3 is assembled in the inner hole of the puncture needle 22.

[0106] As Figure 18 shown, in the initial state, the positioning block 43 on the lever 41 under the button 4 limits the rightmost first limiting block 511 of the main control pull rod 51. During the operation, first puncture the eye tissue of the patient with the puncture needle 22 to form an incision. After the puncture is completed, the operator pushes the sliding button 24 to retract the puncture needle assembly 2 away from the eye tissue.

[0107] As Figure 19As shown, when the button 4 is pressed, the button 4 pushes the distal end of the lever 41 to rotate downward. At the same time, the right end of the lever 41 rotates upward, and the positioning block 43 on the lever 41 leaves the first limit block 511, releasing the limit on the main control pull rod 51. Under the action of the tension spring 52, the main control pull rod 51 moves axially toward the proximal end until the second limit block 512 on the main control pull rod 51 moves to the position of the positioning block 43 on the lever 41, at which time the main control pull rod 51 stops moving. During the movement of the main control pull rod 51, the bump 513 on the lower side of the main control pull rod 51 pushes the slider 61 of the slider assembly 6 downward. When the slider assembly 6 moves downward, the magnet 631 on the slider 61 attracts the iron ring 82 on the needle retraction turntable 8 to generate an eccentric force, driving the needle retraction turntable 8 to rotate by an angle of one step. At the same time, the limiting portion 322 on the needle pushing assembly 3 moves one step distance toward the proximal end along the step, and while the compression spring 33 pushes the needle 31 toward the proximal end, the elastic claws 36 at the distal end of the needle 31 open outside the implant 9 and move the elastic claws 36 to the rear end of the tail 92 of the first implant 9. When the slider assembly 6 moves downward, the guiding and limiting block 711 on the striking head 71 of the striking assembly 7 slides along the guiding curved surface 613 on the slider. When the through hole 614 on the slider 61 is aligned with the striking head 71, the striking head 71 passes through the through hole 614 on the slider 61 and passes through the through hole on the needle retraction turntable mounting seat 123 to strike the striking portion 321 on the needle pushing mounting seat 32, pushing the needle 31 to move axially toward the distal end and pushing the implant 9 to the trabecular meshwork site of the patient.

[0108] During the process of pressing the button 4, through the mutual cooperation of the main control pull rod assembly 5, the slider assembly 6, the needle retraction turntable 8, and the striking assembly 7, the needle pushing assembly 3 is first retracted, so that when its elastic claws 36 are retracted to the tail 92 of the next implant 9 to be struck, the striking head 71 is in place again to achieve the striking action.

[0109] After one implantation is completed, when the button 4 is released, the positioning block 43 on the lever 41 moves downward under the action of the return spring 42, releasing the limit on the second limit block 512 on the main control pull rod 51. Under the action of the tension spring 52, the main control pull rod 51 continues to move toward the proximal end until the positioning block 43 on the lever 41 forms a limit on the second first limit block 511 on the main control pull rod 51. During this process, the trough position between the bumps 513 on the lower side of the main control pull rod 51 moves to a position opposite to the slider 61, and the slider 61 moves upward to the initial position under the action of the compression spring 62. At the same time, the guiding and limiting block 711 on the striking head 71 of the striking assembly 7 slides along the guiding curved surface 613 on the slider 61 and pushes the striking assembly 7 toward the proximal end, compressing the compression spring 73 of the striking assembly 7 to facilitate the delivery of the next implant 9.

[0110] By repeating the above process, the intraocular implant can be delivered to the patient repeatedly, and multiple intraocular implants 9 can be delivered to the patient's trabecular meshwork, so that the fluid in the patient's anterior chamber of the eye flows into the Schlemm's canal through the implant 9, completing the intraocular implant delivery surgery.

[0111] Example 2

[0112] On the basis of Example 1, the difference from Example 1 is that Figures 20-21 As shown, the driving member 63 on the slider assembly 6 is an elastic paddle 632, which is an elastic member. The elastic paddle 632 is arranged on one side of the through hole 614 on the side, and a plurality of paddle blocks 83 are provided on the side of the needle withdrawal dial 8 close to the elastic paddle 632. The paddle blocks 83 are distributed on the needle withdrawal dial 8 with a set circumferential spacing. When the slider assembly 6 moves downward, the elastic paddle 632 on the slider assembly 6 drives the paddle blocks 83 to move, driving the needle withdrawal dial 8 to rotate an angle corresponding to a step, so that the push pin 31 of the push pin assembly 3 moves a distance of a step along the axial proximal end.

[0113] The operating principle of the intraocular implant delivery device of the present invention is essentially the same as that of Example 1. The difference is that when the slider assembly 6 moves downward, the elastic paddle 632 on the slider assembly 6 pushes the paddle block 83 on the needle-retraction dial 8 to rotate by an angle corresponding to a step. This causes the push pin 31 of the push pin assembly 3 to move axially proximally by a distance of one step under the action of the compression spring 33. This causes the elastic claw 36 at the distal end of the push pin 31 to open, allowing it to move to the tail of the first implant 9. When the striking assembly 7 strikes the striking portion 321 of the push pin assembly 3, the push pin 31 is able to push the implant 9 into the patient's surgical site, completing the primary implantation of the implant 9. However, when the slider 61 moves upward, the push pin assembly does not move axially due to the obstruction of the high step.

[0114] Example 3

[0115] Compared with Example 1, the intraocular implant delivery device of this embodiment does not have the puncture needle assembly 2 and the sliding button 24. Other structures and working principles are similar and will not be described in detail here.

[0116] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An intraocular implant delivery device, characterized in that: It includes a housing, a main control pull rod assembly, a slider assembly, a striking assembly, a needle retracting turntable and a needle pushing assembly. The main control pull rod assembly, the slider assembly, the striking assembly and the needle retracting turntable are all arranged inside the housing. A through hole is provided at the distal end of the housing, and the needle of the needle pushing assembly passes through the through hole and extends to the outside of the housing. An energy source capable of selectively releasing energy is provided on each of the main control pull rod assembly, the slider assembly and the striking assembly; The main control pull rod assembly is actuated by an operator through a button provided on the housing, so that the energy source drives the main control pull rod assembly to move axially; The slider assembly is arranged longitudinally adjacent to the main control pull rod. A plurality of bumps are provided on the side surface of the main control pull rod facing the slider assembly. When the button is pressed and the main control pull rod moves axially, the bumps can push the slider assembly to move longitudinally away from the button. When the bumps move away from the slider assembly along with the main control pull rod, the energy source pushes the slider assembly to move longitudinally towards the button to the initial position; The needle retracting turntable is arranged on one side of the distal end of the slider assembly. A plurality of levels of limiting steps are provided on the side surface of the needle retracting turntable facing the needle pushing assembly. A driving member for driving the needle retracting turntable to rotate is provided on the slider assembly. When the slider assembly moves longitudinally away from the button, the driving member drives the needle retracting turntable to rotate by an angle corresponding to one step, so that the needle of the needle pushing assembly retracts proximally by a distance of one step; The striking assembly is arranged on one side of the proximal end of the slider assembly. When the slider assembly is in the initial position, the energy source connected to the striking assembly is in an energy storage state. When the slider assembly moves longitudinally away from the button, the striking assembly moves distally along the guiding surface of the slider assembly under the push of the energy source to strike the needle pushing assembly; The needle pushing assembly is arranged on one side of the distal end of the needle retracting turntable. At least one implant is accommodated inside the needle. An elastic claw is provided at the distal end of the needle. When the needle retracts proximally, the elastic claw opens when passing through the implant, so that the elastic claw moves from the head of the implant to the tail of the implant; when the striking assembly strikes the needle pushing assembly, the needle pushing assembly drives the needle to move towards the distal end of the housing, and pushes the implant to be delivered to the implant site of the patient.

2. The intraocular implant delivery device according to claim 1, wherein, The energy source is a motor, a magnetic iron or an elastomer.

3. The intraocular implant delivery device according to claim 1, characterized in that, The main control pull rod assembly includes a main control pull rod and a spring. The spring is an energy source connected to the main control pull rod. One end of the spring is fixed on the main control pull rod, and the other end is fixed on the housing. When the button is in the initial position, the button forms a limit on the main control pull rod. At this time, the spring is in an energy storage state. When the button is pressed, the spring pushes the main control pull rod to move axially towards the proximal or distal direction.

4. The intraocular implant delivery device according to claim 3, wherein, A plurality of groups of first limit blocks and second limit blocks are provided on the side surface of the main control pull rod away from the slider assembly. The first limit blocks and the second limit blocks are arranged alternately and are used to limit the main control pull rod when the button is pressed and released; the width of the bump corresponds to the distance between adjacent first limit blocks.

5. The intraocular implant delivery device according to claim 1, characterized in that, The button actuates the main control pull rod through a lever and a return spring. A shaft hole is provided in the middle of the lever. A fixed shaft is provided in the housing, and the fixed shaft passes through the shaft hole on the lever. One end of the lever corresponds to the position of the button, and the other end of the lever is connected to the return spring. A positioning block is provided on the lever, and the positioning block is used to limit the main control pull rod.

6. The intraocular implant delivery device according to claim 1, wherein The slider assembly includes a slider and a spring. The spring is an energy source connected to the slider. The slider includes side plates and two guide plates extending vertically outward from the side plates. The two guide plates are spaced apart and guide surfaces are respectively provided on the opposite surfaces of the two guide plates. A through hole corresponding to the striking assembly is provided on the side plate located between the two guide plates, and the driving member is provided on the side plate of the slider.

7. The intraocular implant delivery device according to claim 6, wherein, An element magnetically coupled with the driving member is provided on the needle retraction turntable. When the slider assembly moves longitudinally away from the button, under the action of magnetic force, the driving member pushes the needle retraction turntable to rotate by an angle corresponding to one step, so that the needle of the needle pushing assembly retracts axially towards the proximal end by a distance corresponding to one step.

8. The intraocular implant delivery device according to claim 6, wherein, The driving member is an elastic flap. A plurality of lugs are provided on the needle retraction turntable, and the lugs are distributed on the needle retraction turntable at a set circumferential pitch. When the slider assembly moves longitudinally away from the button, the elastic flap on the slider assembly toggles the lugs to move, driving the needle retraction turntable to rotate by an angle corresponding to one step, so that the needle of the needle pushing assembly retracts axially towards the proximal end by a distance corresponding to one step.

9. The intraocular implant delivery device according to claim 1, wherein The striking assembly includes a striking head and a spring limiting portion. A spring is provided between the spring limiting portion and the housing. A guide limiting block is provided on the striking head. When the slider assembly slides longitudinally away from the button, the guide limiting block slides along the guide surface, so that the striking head moves towards the distal end to strike the needle pushing assembly. When the slider assembly slides longitudinally towards the button, the guide surface pushes the striking head towards the proximal end and stores energy in the spring.

10. The intraocular implant delivery device according to claim 9, wherein, A guide bar is provided at the lower part of the spring limiting portion, and a corresponding axial guide groove is provided in the housing. The guide bar is in sliding fit with the axial guide groove.

11. The intraocular implant delivery device according to claim 1, wherein, The needle pushing assembly includes a needle, a needle pushing assembly seat and a spring. The needle is fixed on the needle pushing assembly seat. A retaining wall for fixing the spring is provided on the housing. The spring is sleeved on the needle and is connected between the needle fixing seat and the retaining wall. The needle pushing assembly seat abuts against the step of the needle retraction turntable, so that when the needle retraction turntable rotates, the spring pushes the needle pushing assembly seat to move axially towards the proximal end, driving the needle to move from the head of the implant to the tail of the implant; when the striking assembly moves towards the distal end, it strikes the needle pushing assembly seat to push the needle to strike the implant.

12. The intraocular implant delivery device according to claim 1, wherein, It further includes a puncture needle assembly for forming an incision in eye tissue; a sliding button is further provided on the housing, and the sliding button is used to control the puncture needle assembly to retract towards the proximal end.

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