Eye implant conveying equipment

Abstract

The utility model discloses eye implant conveying equipment, and relates to the technical field of medical instruments, the eye implant conveying equipment comprises a pen assembly, a needle, an injection mechanism and a protection assembly, the needle is arranged on the pen assembly, and the needle is used for containing an eye implant; the injection mechanism is arranged on the pen assembly, and the injection mechanism is used for pushing the eye implant out of the needle head so as to achieve conveying of the eye implant; the protection assembly is arranged on the pen assembly and can move, the protection assembly locks the injection mechanism when moving to a first position, and the protection assembly releases the injection mechanism when moving to a second position. According to the eye implant conveying equipment, the protection assembly with the locking and releasing functions is introduced, accurate control over the injection mechanism is achieved, and therefore the safety of the eye implant conveying equipment is remarkably improved, and unnecessary medicine release or medical accidents caused by misoperation are prevented.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to an eye implant delivery device. Background Art

[0002] In the field of ophthalmology, precise delivery of ocular implants is crucial to ensure that drugs or therapeutic implants are safely and accurately delivered to specific locations within the eye. While existing delivery devices have met these requirements to a certain extent, their design often overlooks operational safety.

[0003] Currently, ocular implant delivery devices generally lack effective safety mechanisms to prevent accidental activation during operation. Without these safeguards, medical personnel could inadvertently trigger the injection mechanism during operation, resulting in unwanted drug release and even medical accidents. Furthermore, existing device designs can be structurally complex, increasing manufacturing costs and maintenance difficulties while also increasing the risk of device failure. To address these shortcomings, it is necessary to develop a delivery device with safety features to ensure safe and accurate operation. Utility Model Content

[0004] The purpose of this application is to provide an ocular implant delivery device, which achieves precise control of the injection mechanism by introducing a protective component with locking and releasing functions, thereby significantly improving the safety of the ocular implant delivery device and preventing unnecessary drug release or medical accidents caused by misoperation.

[0005] To achieve the above objectives, the present application provides an ocular implant delivery device, comprising:

[0006] Pen assembly;

[0007] a needle, provided in the pen assembly, the needle being used to accommodate an ocular implant;

[0008] an injection mechanism, provided in the pen assembly, the injection mechanism being used to push the ocular implant out of the needle to achieve delivery of the ocular implant;

[0009] The protection component is provided on the pen component and is movable. When the protection component moves to a first position, the injection mechanism is locked. When the protection component moves to a second position, the injection mechanism is released.

[0010] In some embodiments, the injection mechanism comprises:

[0011] a trigger assembly, provided on the pen assembly;

[0012] an action component, disposed in the pen assembly, the action component being movable in the pen assembly, and configured to push the ocular implant out of the needle under the control of the trigger assembly;

[0013] The objects locked and released by the protection component are the trigger component and / or the action component.

[0014] In some embodiments, the pen assembly includes a pen body with a perforation; the action assembly includes a push rod with a positioning hole, the push rod being used to push the ocular implant out of the needle; the trigger assembly includes an injection button with a positioning groove;

[0015] The protective component includes a safety pull ring, which is provided with a limiting boss and a limiting protrusion. The limiting protrusion is located on a radial side of the limiting boss. The limiting boss passes through the through hole and into the positioning hole to lock the push rod, and the limiting protrusion is stuck in the positioning groove to lock the injection button.

[0016] In some embodiments, the safety pull ring further includes a control handle provided with an anti-slip structure; and / or,

[0017] The injection button includes a pressing block provided with an anti-slip structure.

[0018] In some embodiments, the pen assembly comprises:

[0019] Pen body;

[0020] The front cone is located at the proximal end of the pen cap;

[0021] a pen cap, detachably connected to the pen body and / or the front cone;

[0022] Wherein, the needle is arranged on the pen body, and the needle passes through the front cone.

[0023] In some embodiments, the pen body is provided with an anti-slip structure; and / or,

[0024] The pen body is provided with a special-shaped hole; the injection mechanism includes an injection button, and the injection button is provided in the special-shaped hole; and / or,

[0025] The front cone is provided with a matching flange; the pen cap is interference-fitted with the matching flange; and / or,

[0026] The needle includes a needle tube, and the needle tube is provided with a needle tube notch; the ocular implant delivery device further includes:

[0027] A sleeve is sleeved on the needle tube, and the position of the sleeve on the needle tube is adjustable; the sleeve is made of elastic material, the sleeve wraps the needle tube gap, and the sleeve enters the needle tube gap under the action of its own elasticity to fix the eye implant in the needle tube.

[0028] In some embodiments, the ocular implant delivery apparatus further comprises:

[0029] A needle retracting mechanism is provided in the pen assembly, the needle retracting mechanism is connected to the needle, and is used to control the needle to be retracted into the pen assembly.

[0030] In some embodiments, the needle is provided with a connected needle tube and a connector, the connector is provided with a first connector and a second connector, the first connector is connected to the pen assembly, and the second connector is connected to the needle retracting mechanism;

[0031] When the needle retracting mechanism controls the movement of the needle, the force exerted by the pen assembly on the first connecting body is smaller than the force exerted by the needle retracting mechanism on the second connecting body.

[0032] In some embodiments, the pen assembly includes a front cone, the front cone is provided with a through hole, a slide groove and a clamping groove; the needle collection mechanism includes a needle collection sleeve, and the needle collection sleeve is provided with a clamping claw;

[0033] The needle tube passes through the through hole;

[0034] The first connector includes a first protrusion and a second protrusion, the first protrusion cooperates with the slide groove, and the second protrusion cooperates with the clamping groove;

[0035] The second connector includes a third protrusion, and the third protrusion cooperates with the clamping claw;

[0036] When the needle retraction sleeve controls the needle tube to retract from the through hole to the front cone, the force exerted by the clamping groove on the second protrusion is smaller than the force exerted by the clamping jaw on the third protrusion.

[0037] In some embodiments, the needle retraction mechanism includes a needle retraction sleeve, the needle retraction sleeve is provided with a support arm, the support arm is provided with a clamping claw and a limit portion; the injection mechanism includes a trigger assembly and an action assembly, the action assembly is provided in the needle retraction sleeve, and the action assembly includes:

[0038] A push rod, comprising a needle portion, a movable seat, and a deformation mechanism connected in sequence, wherein the needle portion penetrates the needle head, the movable seat is provided on the support arm, the movable seat is movable in the support arm, and the movable seat is provided with a positioning hole for locking the protective assembly. The distal end of the push rod is restricted by the limiting portion, and the movable range of the movable seat is restricted by the clamping claw;

[0039] The trigger component includes:

[0040] An injection button is provided on the pen assembly. The injection button is provided with a positioning groove for locking the protective assembly. By pressing the injection button to compress the deformation mechanism, the ejector part pushes the eye implant out of the needle head.

[0041] Compared with the above-mentioned background technology, the ocular implant delivery device provided in the present application mainly includes a pen assembly, a needle, an injection mechanism and a protective assembly. The needle is provided in the pen assembly and is used to accommodate the ocular implant; the injection mechanism is provided in the pen assembly and is used to push the ocular implant out of the needle to achieve the delivery of the ocular implant; the protective assembly is provided in the pen assembly and is movable. When the protective assembly moves to a first position, it locks the injection mechanism, and when the protective assembly moves to a second position, it releases the injection mechanism.

[0042] In the field of ophthalmic treatment, precise delivery of ocular implants is crucial to ensure that drugs or therapeutic implants are delivered safely and accurately to specific locations within the eye. However, existing delivery devices generally lack effective safety mechanisms to prevent accidental activation during operation. Without safety protection measures, medical staff may inadvertently trigger the injection mechanism during operation, causing unnecessary drug release and even medical accidents. In addition, the design of existing devices may be structurally complex, increasing manufacturing costs and maintenance difficulties, while also increasing the risk of equipment failure.

[0043] To address these shortcomings, the ocular implant delivery device provided in this application incorporates a protective assembly with locking and releasing functions, achieving precise control over the injection mechanism. This protective assembly is movably mounted on the pen assembly and can be switched between two positions based on the operator's needs: the first position locks the injection mechanism, preventing it from being triggered under unauthorized or inappropriate operating conditions; the second position releases the injection mechanism, allowing ocular implant delivery under correct operating conditions. This design significantly improves device safety, effectively preventing unnecessary drug release or medical accidents caused by misoperation. It also simplifies the device's structure, reduces manufacturing and maintenance costs, and mitigates the risk of device failure.

[0044] Specifically, when the protective assembly moves to the first position, these locking mechanisms ensure that the injection mechanism is locked, preventing accidental activation. When the protective assembly moves to the second position, the locking mechanisms are released, allowing the injection mechanism to operate normally and achieving accurate delivery of the ocular implant. Through this innovative design, the ocular implant delivery device of the present application not only improves operational safety but also ensures the accuracy and reliability of the delivery process.

[0045] In conjunction with the above structure and process descriptions, it can be seen that the ocular implant delivery device has at least the following beneficial effects: by introducing a protective component with locking and releasing functions, the ocular implant delivery device achieves precise control of the injection mechanism, thereby significantly improving the safety of the ocular implant delivery device and preventing unnecessary drug release or medical accidents caused by misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0047] Figure 1 A schematic diagram of a first state of an ocular implant delivery device provided in an embodiment of the present application;

[0048] Figure 2 A schematic diagram of a second state of an ocular implant delivery device provided in an embodiment of the present application;

[0049] Figure 3 A schematic diagram of a third state of the ocular implant delivery device provided in an embodiment of the present application;

[0050] Figure 4 A schematic diagram of an injection mechanism provided in an embodiment of the present application;

[0051] Figure 5 An exploded view of an ocular implant delivery device provided in an embodiment of the present application;

[0052] Figure 6 A schematic diagram of a safety pull ring provided in an embodiment of the present application;

[0053] Figure 7 A schematic diagram of an injection button provided in an embodiment of the present application;

[0054] Figure 8 A schematic diagram of a safety pull ring and an injection button provided in an embodiment of the present application;

[0055] Figure 9 A schematic diagram of a pen body provided in an embodiment of the present application;

[0056] Figure 10 A schematic diagram of a front cone provided in an embodiment of the present application;

[0057] Figure 11 Schematic diagram of a needle and cannula provided in an embodiment of the present application;

[0058] Figure 12A schematic diagram of a needle provided in an embodiment of the present application;

[0059] Figure 13 A schematic diagram of a needle and pen assembly provided in an embodiment of the present application;

[0060] Figure 14 A schematic diagram of a needle and needle retraction mechanism provided in an embodiment of the present application;

[0061] Figure 15 A schematic diagram of a needle-retracting mechanism provided in an embodiment of the present application;

[0062] Figure 16 A schematic diagram of an action component provided in an embodiment of the present application;

[0063] Figure 17 A schematic diagram of a push rod and a needle reduction sleeve provided in an embodiment of the present application;

[0064] Figure 18 A cross-sectional view of an ocular implant delivery device according to an embodiment of the present application.

[0065] in:

[0066] Pen assembly 1, pen body 11, perforation 111, anti-slip structure 112, special-shaped hole 113, front cone 12, through hole 121, slide groove 122, card slot 123, matching flange 124, pen cap 13,

[0067] Needle 2, needle tube 21, needle tube notch 211, connector 22, first connector 221, first bump 2211, second bump 2212, second connector 222, third bump 2221,

[0068] Eye implants3.

[0069] Injection mechanism 4,

[0070] Trigger assembly 41, injection button 411, pressing block 4111, positioning groove 41111, limiting platform 4112, force transmission block 4113,

[0071] Action component 42, push rod 421, ejector pin 4211, movable seat 4212, positioning hole 42121, deformation mechanism 4213, positioning seat 4214,

[0072] Needle collection mechanism 5, needle collection sleeve 51, clamping claw 511, support arm 512, side arm 5121, bottom arm 5122, limiting part 513, cylinder 514, operating cap 515,

[0073] Protection component 6, safety pull ring 61, limiting boss 611, limiting protrusion 612, control handle 613,

[0074] Casing 7. DETAILED DESCRIPTION

[0075] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0076] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0077] Please refer to Figures 1 to 3 ,in, Figure 1 This is a schematic diagram of a first state of an ocular implant delivery device provided in an embodiment of the present application. Figure 2 This is a schematic diagram of the second state of the ocular implant delivery device provided in an embodiment of the present application. Figure 3 This is a schematic diagram of the third state of the ocular implant delivery device provided in an embodiment of the present application.

[0078] It should be noted that the proximal end in this application refers to the eye implant delivery device, close to the needle 2, that is, toward the injection site; the distal end is in the opposite direction to the proximal end, that is, away from the injection site.

[0079] In a first specific embodiment, the ocular implant delivery device provided by the embodiment of the present application mainly includes a pen assembly 1, a needle 2, an injection mechanism 4 and a protective assembly 6. The needle 2 is provided in the pen assembly 1 and is used to accommodate the ocular implant 3; the injection mechanism 4 is provided in the pen assembly 1 and is used to push the ocular implant 3 out of the needle 2 to achieve delivery of the ocular implant 3; the protective assembly 6 is provided in the pen assembly 1 and is movable. When the protective assembly 6 moves to a first position, it locks the injection mechanism 4, and when the protective assembly 6 moves to a second position, it releases the injection mechanism 4.

[0080] contrast Figure 1 and Figure 2 As you can see, Figure 1 The ocular implant delivery device is locked by the protective component 6, which can be regarded as the protective component 6 being in the first position; Figure 2 The ocular implant delivery device in the apparatus is released by the protective component 6 , which can be regarded as the protective component 6 being in the second position, and the ocular implant 3 can be delivered.

[0081] In the field of ophthalmic treatment, precise delivery of ocular implants 3 is crucial for ensuring the safe and accurate delivery of medications or therapeutic implants to specific locations within the eye. However, existing delivery devices generally lack effective safety mechanisms to prevent accidental activation during operation. Without safety safeguards, medical personnel may inadvertently trigger the injection mechanism 4 during operation, resulting in unnecessary drug release and even medical accidents. Furthermore, existing device designs can be structurally complex, increasing manufacturing costs and maintenance difficulties, while also increasing the risk of device failure.

[0082] To address these shortcomings, the ocular implant delivery device provided in this application incorporates a protective assembly 6 with locking and releasing functions, achieving precise control over the injection mechanism 4. This protective assembly 6 is movably mounted on the pen assembly 1 and can be switched between two positions based on the operator's needs: the first position locks the injection mechanism 4, ensuring that it will not be triggered under unauthorized or inappropriate operating conditions; the second position releases the injection mechanism 4, allowing delivery of the ocular implant 3 under correct operating conditions. This design significantly improves the safety of the device, effectively preventing unnecessary drug release or medical accidents caused by misoperation. It also simplifies the device's structure, reduces manufacturing and maintenance costs, and mitigates the risk of device failure.

[0083] Specifically, when the protective assembly 6 moves to the first position, these locking mechanisms ensure that the injection mechanism 4 is locked to prevent accidental activation; when the protective assembly 6 moves to the second position, the locking mechanism is released, allowing the injection mechanism 4 to operate normally and achieve accurate delivery of the ocular implant 3. Through this innovative design, the ocular implant delivery device of the present application not only improves operational safety but also ensures the accuracy and reliability of the delivery process.

[0084] In combination with the above structure and process description, it can be seen that the ocular implant delivery device has at least the following beneficial effects: the ocular implant delivery device achieves precise control of the injection mechanism 4 by introducing the protective component 6 with locking and releasing functions, thereby significantly improving the safety of the ocular implant delivery device and preventing unnecessary drug release or medical accidents caused by misoperation.

[0085] It should be noted that this embodiment does not limit the structural form of the protective component 6. For example, the protective component 6 can be one or more parts, the protective component 6 can be a rotational action, a linear action or a compound action, and the protective component 6 can be a part on the pen component 1 or a part that can be separated from the pen component 1, which should all fall within the scope of description of this application.

[0086] Please refer to Figure 4 , Figure 4 Schematic diagram of the injection mechanism provided in an embodiment of the present application.

[0087] In some embodiments, the injection mechanism 4 comprises:

[0088] A trigger assembly 41 is provided on the pen assembly 1;

[0089] an action component 42 disposed in the pen component 1 , the action component 42 being movable in the pen component 1 , and configured to push the ocular implant 3 out of the needle 2 under the control of the trigger component 41 ;

[0090] The objects locked and released by the protection component 6 are the trigger component 41 and / or the action component 42 .

[0091] In this embodiment, the injection mechanism 4 is a key component of the ocular implant delivery device, responsible for pushing the ocular implant 3 out of the needle 2 to achieve the purpose of delivery. The injection mechanism 4 consists of two main parts: a trigger assembly 41 and an action assembly 42.

[0092] The trigger assembly 41 is a user-operated interface provided on the pen assembly 1. When the user wishes to push the ocular implant 3, the trigger assembly 41 is operated. For example, the trigger assembly 41 may receive and transmit a pressing action of the user, thereby activating the pushing mechanism of the injection mechanism 4.

[0093] The actuator assembly 42 is the actuator of the injection mechanism 4 and is also located within the pen assembly 1. It is able to move freely within the pen assembly 1 and, in response to control signals from the trigger assembly 41, pushes the ocular implant 3 out of the needle 2. The design of the actuator assembly 42 allows for precise control of the pushing force and speed, ensuring that the ocular implant 3 is safely and accurately delivered to the intended location.

[0094] Furthermore, the protective assembly 6 in this embodiment serves as a safety feature. It can lock and release the trigger assembly 41 and / or the actuator assembly 42 to prevent accidental triggering of the injection mechanism 4 under inappropriate conditions. When the protective assembly 6 is locked, the injection mechanism 4 will not be activated even if the operator operates the trigger assembly 41, thereby preventing unnecessary drug release or potential medical accidents. When the protective assembly 6 is released, the operator can safely operate the injection mechanism 4 to deliver the ocular implant 3. This design significantly improves the safety and reliability of the device.

[0095] It should be noted that this embodiment does not limit the control method of the trigger component 41 on the action component 42. For example, the movement in other directions can be converted into the linear motion of the action component 42 through the cooperation of threads, bevels, etc., or the trigger component 41 can directly control the action component 42 in the axial direction of the action component 42, which should all fall within the scope of the description of this application.

[0096] Please refer to Figures 5 to 8 ,in, Figure 5 An exploded view of an ocular implant delivery device provided in an embodiment of the present application is shown. Figure 6 This is a schematic diagram of a safety pull ring provided in an embodiment of the present application. Figure 7 A schematic diagram of an injection button provided in an embodiment of the present application, Figure 8 Schematic diagram of the safety pull ring and injection button provided in an embodiment of the present application.

[0097] In some embodiments, the pen assembly 1 includes a pen body 11 having a through-hole 111 ; the action assembly 42 includes a push rod 421 having a positioning hole 42121 , the push rod 421 being used to push the ocular implant 3 out of the needle 2 ; the trigger assembly 41 includes an injection button 411 having a positioning groove 41111 ;

[0098] The protective component 6 includes a safety pull ring 61, which is provided with a limiting boss 611 and a limiting protrusion 612. The limiting protrusion 612 is located on the radial side of the limiting boss 611. The limiting boss 611 passes through the through hole 111 and into the positioning hole 42121 to lock the push rod 421. The limiting protrusion 612 is locked into the positioning groove 41111 to lock the injection button 411.

[0099] In this embodiment, the locking objects of the safety pull ring 61 include the push rod 421 and the injection button 411, thereby preventing both the trigger component 41 and the action component 42 from malfunctioning, thereby playing a double insurance protection role.

[0100] As an option, the safety pull ring 61 is further provided with a control handle 613. The surface of the control handle 613 is provided with an anti-slip structure, such as a groove, which increases the contact area and improves the friction to play an anti-slip role.

[0101] In this embodiment, the limiting boss 611 and the positioning hole 42121 , as well as the limiting protrusion 612 and the positioning groove 41111 , together constitute a precise locking and unlocking mechanism.

[0102] The protective assembly 6, particularly the safety ring 61, plays a central role in this mechanism. The safety ring 61 is equipped with a retaining post 611 and a retaining projection 612, with the retaining projection 612 located radially to one side of the retaining post 611. During the locking process, the retaining post 611 passes through the through-hole 111 of the pen body 11 and then into the positioning hole 42121 of the push rod 421, locking the push rod 421. Furthermore, the retaining projection 612 engages the positioning groove 41111 of the injection button 411, locking the injection button 411.

[0103] When the safety pull ring 61 is locked, the push rod 421 and the injection button 411 are both fixed in place and cannot move, thereby preventing accidental injection operations.

[0104] When unlocking, the operator needs to rotate the safety pull ring 61 to a certain position first, so that the limiting protrusion 612 is out of the positioning groove 41111, and then pull out the safety pull ring 61, so that the limiting protruding column 611 is out of the positioning hole 42121, to release the push rod 421 and the injection button 411, allowing them to restore the action function. This design not only ensures the safety of the device in the non-use state, but also provides clear operation instructions for the operator, improving the convenience and accuracy of use.

[0105] In some embodiments, the pen assembly 1 comprises:

[0106] a pen body 11;

[0107] a front cone 12 provided at the proximal end of a pen cap 13;

[0108] a pen cap 13, which is detachably connected with the pen body 11 and / or the front cone 12;

[0109] wherein the needle 2 is provided in the pen body 11, and the needle 2 penetrates out of the front cone 12.

[0110] In this embodiment, the design of the pen assembly 1 is composed of several key parts to achieve its structure and function. First, the pen body 11 constitutes the main part of the pen assembly 1, providing a foundation for the support and connection of other components. The front cone 12 is provided at the proximal end of the pen body 11, and the pen cap 13 is connected to protect the front cone 12 and the needle 2 therein.

[0111] The pen cap 13 is designed to be detachably connected with the pen body 11 and / or the front cone 12. This design allows the operator to protect the needle 2 when the device is not in use, and also facilitates cleaning and maintenance. In addition, the detachable feature of the pen cap 13 also provides a simple way to quickly prepare the device for use when needed.

[0112] Please refer to Figure 9 , Figure 9 the schematic diagram of the pen body provided in the embodiments of the present application.

[0113] In some embodiments, the pen body 11 is provided with an anti-slip structure 112.

[0114] In this embodiment, the pen body 11 is designed with an anti-slip structure 112, which increases the friction when holding, ensuring that the operator can operate the device stably even in wet and slippery or wearing gloves conditions, improving the safety and accuracy during use.

[0115] In some embodiments, the pen body 11 is provided with a special-shaped hole 113; the injection mechanism 4 comprises an injection button 411, which is provided in the special-shaped hole 113.

[0116] In this embodiment, the pen body 11 is equipped with a special-shaped hole 113, which has a special shape such as an oval shape, providing precise positioning for the injection button 411. This design ensures that the injection button 411 can be firmly installed on the pen body 11, while making it easy for the operator to identify and operate, improving the accuracy of injection and the convenience of operation.

[0117] Please refer to Figure 10 , Figure 10 The schematic diagram of the front cone provided in the embodiment of the present application.

[0118] In some embodiments, the front cone 12 is provided with a matching flange 124; the pen cap 13 is in interference fit with the matching flange 124.

[0119] In this embodiment, the front cone 12 is designed with a matching flange 124, which is in interference fit with the pen cap 13. This matching means that when the pen cap 13 is installed on the front cone 12, the contact between the two is tight, to ensure that the pen cap 13 does not accidentally fall off or rotate during use, thereby maintaining the structural stability and operational reliability of the device. Through the design of the matching flange 124, the overall tightness and durability of the pen assembly 1 are enhanced.

[0120] Please refer to Figure 11 , Figure 11 The schematic diagram of the needle and sleeve provided in the embodiment of the present application.

[0121] In some embodiments, the needle 2 includes a needle tube 21, which is provided with a needle tube notch 211; the ocular implant delivery device further includes:

[0122] A sleeve 7 is sleeved on the needle tube 21, and the position of the sleeve 7 on the needle tube 21 is adjustable; the sleeve 7 is made of elastic material, the sleeve 7 wraps the needle tube notch 211, and the sleeve 7 enters the needle tube notch 211 under the action of its own elasticity, thereby fixing the ocular implant 3 in the needle tube 21.

[0123] In this embodiment, the component needle tube 21 of the needle 2 is designed with a needle tube notch 211, which allows the sleeve 7 to be tightly sleeved on the outside of the needle tube 21. The sleeve 7 has multiple functions, first, it is made of elastic material, which exerts pressure on the internal ocular implant 3 by wrapping the needle tube notch 211, and this pressure helps to maintain the stability of the ocular implant 3, preventing it from shifting position or being damaged in integrity due to vibration or other external factors. In addition, the adjustable position of the sleeve 7 allows it to serve as a marker for injection depth, which is crucial for ensuring that the ocular implant 3 is delivered to a specific location within the eye at the correct depth. By adjusting the position of the sleeve 7, medical personnel can accurately control the injection depth, thereby improving the accuracy and safety of treatment.

[0124] In a specific embodiment, the ocular implant delivery apparatus further comprises:

[0125] The needle retracting mechanism 5 is provided in the pen assembly 1 . The needle retracting mechanism 5 is connected to the needle 2 . The needle retracting mechanism 5 is used to control the needle 2 to be retracted into the pen assembly 1 .

[0126] In this embodiment, the needle retraction mechanism 5 is connected to the needle 2 in the pen assembly 1 and is capable of controlling the retraction of the needle 2 into the pen assembly 1 after the injection procedure is completed. This design directly addresses the existing problem of the needle 2 being exposed. By retracting the needle 2 into the pen body 11, the safety hazards associated with such an exposed needle 2 are fundamentally avoided. First, when the needle 2 is retracted into the pen body 11, medical staff and patients are not exposed to the needle 2 during operation, significantly reducing the risk of accidental sticking. Second, since the needle 2 is no longer exposed, its contact with the external environment is reduced, which helps to reduce the risk of cross-infection caused by contamination of the needle 2.

[0127] contrast Figure 2 and Figure 3 As you can see, Figure 2 The ocular implant delivery device can deliver the ocular implant 3, and the needle 2 is exposed outside the pen assembly 1; Figure 3 The ocular implant delivery device can, after completing the delivery of the ocular implant 3 , be controlled by the needle retracting mechanism 5 so that the needle 2 is retracted into the pen assembly 1 .

[0128] It should be noted that this embodiment does not limit the control method of the needle retracting mechanism 5 on the needle 2. For example, the needle retracting mechanism 5 may pull the needle 2 to change its axial position. In this case, the needle retracting mechanism 5 may directly provide a pulling effect on the needle 2, or it may be matched with an elastic member to change the degree of deformation of the elastic member so that the elastic member provides an elastic effect on the needle 2, or it may be through threaded matching and other methods to convert the rotational motion into the linear motion of the needle 2; in addition, the number of parts of the needle retracting mechanism 5 includes but is not limited to one or more, and the position of the needle retracting mechanism 5 includes but is not limited to the axial direction of the needle 2 and the axial side of the needle 2. As long as the needle retracting mechanism 5 can control the needle 2, it should fall within the scope of the description of this application.

[0129] Please refer to Figures 12 to 14 ,in, Figure 12 A schematic diagram of a needle provided in an embodiment of the present application, Figure 13 Schematic diagram of the needle and pen assembly provided in an embodiment of the present application,

[0130] Figure 14 Schematic diagram of the needle and needle retraction mechanism provided in an embodiment of the present application.

[0131] In some embodiments, the needle 2 is provided with a connected needle tube 21 and a connecting member 22, the connecting member 22 is provided with a first connecting body 221 and a second connecting body 222, the first connecting body 221 is connected to the pen assembly 1, and the second connecting body 222 is connected to the needle retracting mechanism 5;

[0132] When the needle retracting mechanism 5 controls the movement of the needle 2 , the force exerted by the pen assembly 1 on the first connecting body 221 is smaller than the force exerted by the needle retracting mechanism 5 on the second connecting body 222 .

[0133] In this embodiment, the needle 2 is designed to include a needle tube 21 and a connector 22. The connector 22 is constructed with two key components: a first connector 221 and a second connector 222. The first connector 221 connects to the pen assembly 1 to maintain the correct position of the needle 2 within the pen assembly 1, for example, by ensuring axial and radial stability. The second connector 222 connects to the needle retraction mechanism 5, a crucial connection during the needle retraction operation.

[0134] When the needle retraction mechanism 5 is in operation, the force it exerts on the second connector 222 is key to controlling the retraction of the needle 2. During operation, the force exerted by the needle retraction mechanism 5 on the second connector 222 is greater than the force exerted by the pen assembly 1 on the first connector 221. This design allows the needle retraction mechanism 5 to overcome the stabilizing effect of the pen assembly 1 on the needle 2 when necessary, thereby achieving smooth needle retraction.

[0135] In short, this mechanism ensures that under normal use, the pen assembly 1 can stably maintain the position of the needle 2, and when the needle retraction operation is required, the needle retraction mechanism 5 can release the needle 2 and safely retract it into the pen assembly 1, thereby ensuring the safety and convenience of operation.

[0136] Please continue to refer to Figure 13 and Figure 14 In some embodiments, the pen assembly 1 includes a front cone 12, which is provided with a through hole 121, a slide groove 122 and a clamping groove 123; the needle collection mechanism 5 includes a needle collection sleeve 51, which is provided with a clamping claw 511;

[0137] The needle tube 21 passes through the through hole 121;

[0138] The first connector 221 includes a first protrusion 2211 and a second protrusion 2212 . The first protrusion 2211 cooperates with the slide groove 122 , and the second protrusion 2212 cooperates with the clamping groove 123 .

[0139] The second connecting body 222 includes a third protrusion 2221, and the third protrusion 2221 cooperates with the clamping claw 511;

[0140] When the needle retraction sleeve 51 controls the needle tube 21 to retract from the through hole 121 to the front cone 12 , the force exerted by the locking groove 123 on the second protrusion 2212 is smaller than the force exerted by the clamping jaw 511 on the third protrusion 2221 .

[0141] In this embodiment, the design of the pen assembly 1 specifically includes a nose cone 12, which has a through hole 121, a slide groove 122, and a latching slot 123, which together play an important role. The through hole 121 of the nose cone 12 allows the needle tube 21 to pass through, ensuring that the needle 2 can work in conjunction with the pen assembly 1 while maintaining the correct position and orientation.

[0142] The needle retraction mechanism 5 is composed of a needle retraction sleeve 51, on which a clamping jaw 511 is provided for interacting with the connector 22 of the needle 2 during the needle retraction process. The design of the clamping jaw 511 enables it to cooperate with the third protrusion 2221 on the second connector 222, which is the key to achieving the needle retraction action.

[0143] The first connector 221 consists of a first protrusion 2211 and a second protrusion 2212. The first protrusion 2211 engages with the slide 122, limiting its radial position. The second protrusion 2212 engages with the latch 123, which has a pair of additional protrusions compared to the slide 122. This limits the second protrusion 2212 both axially and radially. This design allows the first connector 221 to stably secure the needle 2 within the pen assembly 1 while allowing it to move when needed.

[0144] During needle retraction, the needle retraction sleeve 51 controls the needle tube 21 to retract from the through-hole 121 into the nose cone 12. At this point, the force exerted by the latch 123 on the second protrusion 2212 is designed to be less than the force exerted by the clamping jaw 511 on the third protrusion 2221. This force imbalance is intentional, ensuring that when the needle retraction sleeve 51 is pulled, the second connector 222 overcomes the interaction between the first connector 221 and the nose cone 12, allowing the needle 2 to be smoothly retracted into the pen assembly 1, completing the needle retraction operation. This design not only ensures a smooth needle retraction process but also enhances the safety and reliability of the entire ocular implant delivery device.

[0145] Optionally, there are two third bumps 2221, and the two third bumps 2221 are arranged at both ends of the first diagonal of the connecting member 22, and the first bump 2211 and the second bump 2212 are arranged at both ends of the second diagonal of the connecting member 22, and the first diagonal and the second diagonal are perpendicular.

[0146] In this embodiment, there are two third protrusions 2221. This configuration is intended to provide better force balance and stability during the operation of the needle retraction mechanism 5. These two third protrusions 2221 are symmetrically arranged at opposite ends of the first diagonal of the connector 22. This diagonal arrangement helps evenly distribute force during needle retraction, reducing stress concentration caused by a single force point.

[0147] The first and second protrusions 2211, 2212 are positioned at opposite ends of the second diagonal of the connector 22, forming a perpendicular cross-pattern with the third protrusion 2221. This design not only ensures the stability of the needle 2 within the pen assembly 1 but also maintains force balance during needle retraction. When the needle retraction sleeve 51, through the jaws 511, acts on any third protrusion 2221, the third protrusion 2221 at the other end, along with the first and second protrusions 2211, 2212, and other corresponding protrusions, work synergistically to ensure the stability of the entire system under load.

[0148] Furthermore, the perpendicular intersection of the first and second diagonals facilitates a smooth motion trajectory during needle retraction, reducing any jamming or awkwardness caused by force imbalance and ensuring smooth retraction of the needle 2 into the pen assembly 1. This precise geometric layout and mechanical design enhances the safety and efficiency of the entire ocular implant delivery device during operation.

[0149] Please refer to Figure 15 , Figure 15 A schematic diagram of the needle collection mechanism provided in an embodiment of the present application.

[0150] In some embodiments, the needle collection sleeve 51 is further provided with an operating cap 515 . The operating cap 515 is located at the distal end of the pen assembly 1 . The operating cap 515 is used to control the clamping jaw 511 to drive the needle 2 to move.

[0151] In this embodiment, the design of the needle reduction sleeve 51 is further optimized to enhance operational stability and user experience. The operating cap 515, a key component of the needle reduction sleeve 51, is located at the distal end of the pen assembly 1, making it the primary control point for the operator during needle reduction. The operating cap 515 may include a grip-friendly groove. This groove helps increase friction during operation, ensuring a stable grip and control of the operating cap 515 even with wet hands or wearing gloves.

[0152] By operating the cap 515, the operator can apply force to the clamping jaws 511, thereby driving the needle 2 to perform the desired action. This design not only provides an intuitive operation method, but also reduces the possibility of misoperation or slippage during operation by enhancing the control effect, thereby improving the safety and accuracy of the entire ocular implant delivery device.

[0153] Optionally, the needle reduction sleeve 51 is further provided with a cylinder 514 , the proximal end of the cylinder 514 is connected to the clamping claw 511 , the distal end of the cylinder 514 is connected to the operating cap 515 , and the cylinder 514 is located in the pen assembly 1 .

[0154] In this embodiment, cylinder 514 is a key component of needle retraction sleeve 51 and is designed to move freely within pen assembly 1. This mobility of cylinder 514 is key to retracting needle 2. The proximal end of cylinder 514 is connected to jaws 511, while the distal end is connected to operating cap 515.

[0155] To retract the needle, the operator pulls on the needle retraction sleeve 51, a motion transmitted through the cylindrical body 514, causing the jaws 511 to move accordingly. Because the cylindrical body 514 is connected to the jaws 511, the jaws 511 drive the third protrusion 2221 connected to the second connector 222, thereby controlling the retraction of the needle 2. The distal end of the cylindrical body 514 is connected to the operating cap 515, ensuring that the operator can easily apply force and feel feedback during operation.

[0156] The design of the cylindrical body 514 allows for direct and efficient force transmission, while also making the entire needle retraction mechanism 5 more compact and reliable. Through this design, the pen assembly 1 not only maintains the stable position of the needle 2 but also allows for quick and accurate needle retraction when required, significantly improving the safety and operational convenience of the ocular implant delivery device.

[0157] Optionally, the action component 42 is located in the needle collection mechanism 5 .

[0158] The actuating assembly 42 is specifically designed to be located within the needle retraction mechanism 5 and is capable of performing an ejection motion within the needle retraction mechanism 5. This arrangement allows the actuating assembly 42 to perform precise movements under the control of the trigger assembly 41, thereby pushing the ocular implant 3 out of the needle 2. The mobility of the actuating assembly 42 ensures flexibility and accuracy during the injection process, while also making the entire injection mechanism 4 more compact and efficient.

[0159] Please refer to Figure 16 , Figure 16 A schematic diagram of the action components provided in an embodiment of the present application.

[0160] In some embodiments, the needle retraction mechanism 5 includes a needle retraction sleeve 51, which is provided with a support arm 512, which is provided with a clamping claw 511 and a limit portion 513; the injection mechanism 4 includes a trigger assembly 41 and an action assembly 42, which is provided in the needle retraction sleeve 51, and the action assembly 42 includes:

[0161] The push rod 421 is provided with a needle portion 4211, a movable seat 4212, and a deformation mechanism 4213 connected in sequence. The needle portion 4211 penetrates the needle 2. The movable seat 4212 is provided on the support arm 512. The movable seat 4212 is movable in the support arm 512. The movable seat 4212 is provided with a positioning hole 42121 for locking the protective component 6. The distal end of the push rod 421 is restricted by the limiting portion 513. The movable seat 4212 has a range of movement limited by the clamping jaw 511.

[0162] The trigger component 41 includes:

[0163] The injection button 411 is provided on the pen assembly 1 and has a positioning groove 41111 for locking the protective assembly 6. By pressing the injection button 411 to compress the deformation mechanism 4213 to deform, the ejector part 4211 pushes the eye implant 3 out of the needle head 2.

[0164] In this embodiment, the needle reduction sleeve 51 is provided with a support arm 512 , which is connected to the proximal end of the cylinder 514 , and the clamping claw 511 and the limiting portion 513 are respectively located at the proximal end and the distal end of the support arm 512 .

[0165] The actuating assembly 42 is cleverly positioned within the needle-retracting sleeve 51 and comprises a push rod 421 having a push pin portion 4211 and a movable seat 4212. The push pin portion 4211 directly contacts the ocular implant 3 and pushes it out of the needle head 2, while the movable seat 4212 is located on the support arm 512, allowing limited movement within the support arm 512. When the retaining protrusion 611 of the safety pull ring 61 moves through the perforation 111 and into the positioning hole 42121, the safety pull ring 61 locks the movable seat 4212, thereby locking the push rod 421.

[0166] The distal end of the push rod 421 is restricted by the limit portion 513, ensuring precise control when pushing the ocular implant 3, while the movement range of the movable seat 4212 is limited by the clamping claw 511. This design ensures the stability and accuracy of the action component 42 during the injection operation.

[0167] The trigger assembly 41 is the operator-operated component used to control the movement of the ejector portion 4211, thereby precisely ejecting the ocular implant 3 from the needle 2. The trigger assembly 41 may include an injection button 411 or other activation mechanism, which is connected to the actuation assembly 42 to ensure intuitive and responsive operation. When the retaining protrusion 612 of the safety pull ring 61 rotates and engages the positioning groove 41111, the safety pull ring 61 locks the injection button 411.

[0168] This integrated design not only improves the functionality of the ocular implant delivery device, but also optimizes the operator experience, making the entire injection and needle withdrawal process smoother and safer. Through the carefully designed needle withdrawal mechanism 5 and actuation assembly 42, this embodiment provides a reliable and efficient ocular implant delivery solution.

[0169] Please refer to Figure 17 , Figure 17 Schematic diagram of the push rod and needle reduction sleeve provided in an embodiment of the present application.

[0170] In this embodiment, the design of push rod 421 is further optimized to enhance its functionality by introducing a deformation mechanism 4213. Deformation mechanism 4213 is connected to movable seat 4212. This connection allows movable seat 4212 to deform through deformation mechanism 4213 when subjected to an external force, thereby driving ejector pin 4211.

[0171] One component of the trigger assembly 41 is an injection button 411, which is located on the pen assembly 1 for easy operator access. When the operator presses the injection button 411, it transmits force to the deformation mechanism 4213, causing it to deform. This deformation is crucial to the design, as it translates into linear motion of the ejector portion 4211.

[0172] Specifically, the deformation of the deformation mechanism 4213 effectively pushes the ejector portion 4211, causing it to pass through the needle head 2 and eject the ocular implant 3. This process is precisely controlled through the connection between the deformation mechanism 4213 and the movable seat 4212, ensuring that the ocular implant 3 can be safely and accurately delivered to the designated location.

[0173] In some cases, the support arm 512 includes a pair of side arms 5121 and a bottom arm 5122. The proximal ends of the side arms 5121 are provided with clamping jaws 511, and the distal end of the bottom arm 5122 is provided with a stopper 513. The push rod 421 is limited on both sides by the pair of side arms 5121, and the bottom of the push rod 421 is limited by the bottom arm 5122, allowing the push rod 421 to move within the support arm 512. The proximal end of the push rod 421 is provided with a pin 4211 and a movable seat 4212, and the distal end of the push rod 421 is provided with a positioning seat 4214. The deformation mechanism 4213 is connected between the movable seat 4212 and the positioning seat 4214. The forward movement distance of the movable seat 4212 is limited by the clamping jaws 511, and the positioning seat 4214 abuts against the stopper 513 backward.

[0174] Optionally, the deformation mechanism 4213 is a snake-like structure, including a plurality of elastic plates connected one by one, when the injection button 411 extrudes the deformation mechanism 4213, the connecting points of the elastic plates are pressed downward, the included angle between the elastic plates becomes larger, so that the deformation mechanism 4213 is stretched out, the movable seat 4212 is pushed forward, and then the needle part 4211 is driven to realize the pushing action.

[0175] Optionally, the injection button 411 includes a pressing block 4111, a limiting table 4112 and a force transmission block 4113 connected in sequence from top to bottom. The surface of the pressing block 4111 is provided with an anti-skid structure, such as a groove, which increases the contact area and improves the friction to prevent slipping. The positioning groove 41111 is located on the side of the pressing block 4111, the pressing block 4111 can move in the special-shaped hole 113, the limiting table 4112 is located in the pen body 11, the size of the limiting table 4112 is larger than the size of the special-shaped hole 113, the limiting table 4112 abuts against the outer ring position of the special-shaped hole 113, the limiting table 4112 prevents the pressing block 4111 from being pulled out of the special-shaped hole 113, and the force transmission block 4113 extrudes the deformation mechanism 4213.

[0176] Please refer to Figure 18 , Figure 18 The cross-sectional view of the eye implant delivery device provided by the embodiment of the application.

[0177] As Figure 18 shown, at the proximal end of the pen body 11, a front cone 12 is installed, the needle 2 passes out of the front cone 12, the eye implant 3 is in the needle 2, the sleeve 7 is sleeved outside the pillow 2, when the pen cap 13 is connected with the front cone 12, the pen cap 13 abuts against the pen body 11, the safety pull ring 61 is installed on the pen body 11, the safety pull ring 61 locks the injection button 411 and the push rod 421, and the needle collecting sleeve 51 is exposed from the distal end of the pen body 11.

[0178] In a specific embodiment, the process of the needle collecting operation is described as follows.

[0179] The operator needs to pull the operation cap 515 on the needle collecting sleeve 51, which will cause the needle collecting sleeve 51 to move along the pen body 11 away from the proximal end. This action causes the clamping jaw 511 in the needle collecting sleeve 51 to drive the needle 2, so that the needle tube 21 of the needle 2 is guided to retreat into the front cone 12 at the proximal end of the pen body 11, and finally into the pen body 11. This process completes the needle collecting operation, ensuring the proper storage of the needle and the safety of the entire device.

[0180] In a specific embodiment, the process of the deprotection is described as follows.

[0181] This process unlocks the injection mechanism 4 and prepares for the injection operation. Specifically, it first involves twisting the safety ring 61 so that its retaining protrusion 612 disengages from the positioning groove 41111 of the injection button 411. This action releases the locking state of the injection button 411. The operator then pulls the safety ring 61, which causes the retaining protrusion 611 of the safety ring 61 to withdraw from the positioning hole 42121 of the movable seat 4212 of the push rod 421. The withdrawal of the retaining protrusion 611 indicates that the push rod 421 is also unlocked, preparing for the injection operation. Finally, the safety ring 61 is further pulled until it is completely removed from the perforation 111 in the pen body 11. This action indicates that the injection mechanism 4 is fully unlocked and the device is now ready for the injection operation. This series of actions ensures the safety and readiness of the operation.

[0182] It should be noted that many of the components mentioned in this application are universal standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0183] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0184] The above is a detailed introduction to the ocular implant delivery device provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is intended only to facilitate understanding of the method and core concept of the present application. It should be noted that those skilled in the art may make various improvements and modifications to the present application without departing from the principles of the present application, and such improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. An ocular implant delivery device, characterized in that include: Pen assembly; a needle, provided in the pen assembly, the needle being used to accommodate an ocular implant; an injection mechanism, provided in the pen assembly, the injection mechanism being used to push the ocular implant out of the needle to achieve delivery of the ocular implant; The protection component is provided on the pen component and is movable. When the protection component moves to a first position, the injection mechanism is locked. When the protection component moves to a second position, the injection mechanism is released.

2. The ocular implant delivery device of claim 1, wherein: The injection mechanism comprises: a trigger assembly, provided on the pen assembly; an action component, disposed in the pen assembly, the action component being movable in the pen assembly, and configured to push the ocular implant out of the needle under the control of the trigger assembly; The objects locked and released by the protection component are the trigger component and / or the action component.

3. The ocular implant delivery device of claim 2, wherein: The pen assembly includes a pen body with a perforation; the action assembly includes a push rod with a positioning hole, and the push rod is used to push the eye implant out of the needle; the trigger assembly includes an injection button with a positioning groove; The protective component includes a safety pull ring, which is provided with a limiting boss and a limiting protrusion. The limiting protrusion is located on a radial side of the limiting boss. The limiting boss passes through the through hole and into the positioning hole to lock the push rod, and the limiting protrusion is stuck in the positioning groove to lock the injection button.

4. The ocular implant delivery device of claim 3, wherein: The safety pull ring further includes a control handle provided with an anti-slip structure; and / or, The injection button includes a pressing block provided with an anti-slip structure.

5. The ocular implant delivery device of claim 1, wherein: The pen assembly comprises: Pen body; The front cone is located at the proximal end of the pen cap; a pen cap, detachably connected to the pen body and / or the front cone; Wherein, the needle is arranged on the pen body, and the needle passes through the front cone.

6. The ocular implant delivery device of claim 5, wherein: The pen body is provided with an anti-slip structure; and / or, The pen body is provided with a special-shaped hole; the injection mechanism includes an injection button, and the injection button is provided in the special-shaped hole; and / or, The front cone is provided with a matching flange; the pen cap is interference-fitted with the matching flange; and / or, The needle includes a needle tube, and the needle tube is provided with a needle tube notch; The ocular implant delivery apparatus further comprises: a cannula, which is sleeved on the needle tube, and the position of the cannula on the needle tube is adjustable; The sleeve is made of elastic material, and the sleeve wraps the needle tube gap. The sleeve enters the needle tube gap under the action of its own elasticity to fix the eye implant in the needle tube.

7. The ocular implant delivery device of claim 1, wherein: Also includes: A needle retracting mechanism is provided in the pen assembly, the needle retracting mechanism is connected to the needle, and is used to control the needle to be retracted into the pen assembly.

8. The ocular implant delivery device of claim 7, wherein: The needle head is provided with a connected needle tube and a connecting piece, the connecting piece is provided with a first connecting body and a second connecting body, the first connecting body is connected to the pen assembly, and the second connecting body is connected to the needle retracting mechanism; When the needle retracting mechanism controls the movement of the needle, the force exerted by the pen assembly on the first connecting body is smaller than the force exerted by the needle retracting mechanism on the second connecting body.

9. The ocular implant delivery device of claim 8, wherein: The pen assembly includes a front cone, which is provided with a through hole, a slide groove and a clamping groove; the needle collection mechanism includes a needle collection sleeve, which is provided with a clamping claw; The needle tube passes through the through hole; The first connector includes a first protrusion and a second protrusion, the first protrusion cooperates with the slide groove, and the second protrusion cooperates with the clamping groove; The second connector includes a third protrusion, and the third protrusion cooperates with the clamping claw; When the needle retraction sleeve controls the needle tube to retract from the through hole to the front cone, the force exerted by the clamping groove on the second protrusion is smaller than the force exerted by the clamping jaw on the third protrusion.

10. The ocular implant delivery device of claim 7, wherein: The needle collection mechanism includes a needle collection sleeve, which is provided with a support arm, and the support arm is provided with a clamping claw and a limit portion; the injection mechanism includes a trigger assembly and an action assembly, and the action assembly is provided in the needle collection sleeve, and the action assembly includes: A push rod, comprising a needle portion, a movable seat, and a deformation mechanism connected in sequence, wherein the needle portion penetrates the needle head, the movable seat is provided on the support arm, the movable seat is movable in the support arm, and the movable seat is provided with a positioning hole for locking the protective assembly. The distal end of the push rod is restricted by the limiting portion, and the movable range of the movable seat is restricted by the clamping claw; The trigger component includes: An injection button is provided on the pen assembly. The injection button is provided with a positioning groove for locking the protective assembly. By pressing the injection button to compress the deformation mechanism, the ejector part pushes the eye implant out of the needle head.

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