An eye implant delivery device

Abstract

The present invention discloses an ocular implant delivery device, comprising a housing, a rotating wheel, a push-needle connecting rod assembly, a retraction connecting rod assembly, a sleeve and a puncture needle, a through hole is provided in the direction of the distal end of the housing, the sleeve passes through the through hole from the housing and extends to the outside of the housing, the sleeve is fixedly connected to the housing, the puncture needle passes through the sleeve, the proximal end of the puncture needle is fixedly connected to the retraction connecting rod assembly, the push needle of the push-needle connecting rod assembly passes through the inner hole of the puncture needle, the rotating wheel is connected in the housing through a rotating shaft, an opening corresponding to the rotating wheel is provided on the housing, the rotating wheel is respectively connected to the push-needle connecting rod assembly and the retraction connecting rod assembly through a gear rack mechanism, and as the rotating wheel rotates, the push-needle connecting rod assembly can be driven to move toward the distal end of the housing or the retraction connecting rod assembly can be driven to move in a direction away from the distal end of the housing. The present invention has a simple structure, is easy to operate, can improve the accuracy and safety of surgery, and makes surgery more labor-saving, and has higher system stability and reliability.

Description

Technical Field

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

[0002] Glaucoma is a group of diseases characterized by optic atrophy and depression, visual field loss and decreased vision. Glaucoma is associated with increased intraocular pressure, usually due to the inability of the eye's drainage channels to adequately remove aqueous humor from the anterior chamber of the eye, or due to excessive production of aqueous humor caused by the ciliary body in the eye. Patients often experience symptoms such as nausea and pain. If not treated in time, it will lead to vision loss. For the treatment of glaucoma, surgical filtration methods can be used to reduce intraocular pressure by creating a fluid flow path between the anterior chamber and the low-pressure area. Ocular implants can be positioned in the eye to drain fluid from the anterior chamber to multiple locations, such as the sub-Tenon's space, subconjunctival space, suprascleral vein, suprachoroidal space, Schlemm canal and intrascleral space. Ocular implants are generally made of animal-derived / non-animal-derived polymers, metals and other materials, and are generally tubular or tubular-like. According to the different mechanisms of reducing intraocular pressure in glaucoma, the hypotensive effect of drainage of aqueous humor through the subconjunctival space, suprascleral veins and other sites is more obvious. The common surgical route is to penetrate the angle area through the anterior chamber through a micro-corneal incision, reach the subconjunctival space through the sclera; or reach the suprachoroidal space through the anterior chamber angle. This type of surgery requires a corresponding delivery mechanism for this implant to deliver the implant to the corresponding part of the eye.

[0003] The patent document with publication number CN105899170B discloses an inserter for treating glaucoma, which is used to position an intraocular shunt in the eye to treat glaucoma. The drive assembly of the inserter is a cylindrical component, which is coupled to the needle through the needle groove and coupled to the plunger through the plunger groove. The drive assembly also includes a sliding groove that overlaps with the needle groove and the plunger groove in the longitudinal direction. The sliding groove is used to couple the sliding assembly to the drive assembly. The movement of the sliding assembly on the shell drives the rotation of the cylindrical component in the longitudinal direction, so that the needle and the plunger move axially. The cylindrical component is provided with three sections of grooves, and the structural design is relatively complex. On the one hand, the rotation fit of the grooves of the cylindrical component in the longitudinal direction is too long, so that the structure is not compact enough, resulting in low precision; on the other hand, the cylindrical component cannot be integrally formed and assembled in terms of technology. The cylindrical component needs to be processed in two halves and then spliced ​​together, which will also affect the pushing accuracy; on the third hand, the friction surface of the structure is large when it moves, resulting in large dissipation of the pushing force and low pushing efficiency; therefore, it is necessary to improve the existing eye implant delivery device. Summary of the invention

[0004] The purpose of the present invention is to provide an ocular implant delivery device that can accurately deliver the ocular implant to the subconjunctival cavity, thereby reducing the intraocular pressure of patients with high intraocular pressure, has a simple structural design, and provides a better doctor experience in view of the problems of low precision and inability to be integrally formed in the existing ocular implant delivery devices described in the background technology, which affect the pushing accuracy during splicing, and have a large friction surface during pushing, resulting in large pushing force dissipation and low pushing efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an ocular implant conveyor, comprising a shell, a rotating wheel, a push-needle connecting rod assembly, a retraction connecting rod assembly, a sleeve and a puncture needle, a through hole is provided in the direction of the distal end of the shell, the sleeve passes through the through hole from the shell and extends to the outside of the shell, the sleeve is fixedly connected to the shell, the puncture needle passes through the sleeve, the proximal end of the puncture needle is fixedly connected to the retraction connecting rod assembly, the push needle of the push-needle connecting rod assembly passes through the inner hole of the puncture needle, the rotating wheel is connected in the shell through a rotating shaft, an opening corresponding to the rotating wheel is provided on the shell, the rotating wheel is respectively connected to the push-needle connecting rod assembly and the retraction connecting rod assembly through a gear rack mechanism, and as the rotating wheel rotates, it can drive the push-needle connecting rod assembly to move toward the distal end of the shell or drive the retraction connecting rod assembly to move in a direction away from the distal end of the shell.

[0006] As a further improvement of the above scheme, sector gears are respectively provided on the rotating shafts on both sides of the rotating wheel, and racks are respectively provided at the proximal ends of the needle push rod assembly and the retraction rod assembly. The racks on the needle push rod assembly and the retraction rod assembly extend to both sides of the rotating wheel, and can respectively mesh with the sector gears on the rotating shafts on the corresponding sides. Through this arrangement, the needle push rod assembly can be driven to move toward the distal end of the shell by the rotation of the rotating wheel, and the eye implant can be accurately delivered to the subconjunctival cavity, thereby reducing the intraocular pressure value of patients with high intraocular pressure. After the implantation is completed, by continuing to rotate the rotating wheel, the retraction rod assembly can drive the puncture needle to retract, achieving linear needle retraction and improving the safety of the operation.

[0007] As a further improvement of the above scheme, the first rack on the push-needle connecting rod assembly is arranged above the rotating shaft of the rotating wheel, the second rack on the retracting connecting rod assembly is arranged below the rotating shaft of the rotating wheel, the fan-shaped gear on the rotating shaft of the rotating wheel corresponding to the rack of the push-needle connecting rod assembly is meshed with the first rack on the push-needle connecting rod assembly in the initial state, and the fan-shaped gear on the rotating shaft of the rotating wheel corresponding to the rack of the retracting connecting rod assembly is located at the upper part of the rotating shaft in the initial state. Through this arrangement, when the rotating wheel is rotated toward the distal end of the housing, the push-needle connecting rod assembly can drive the push needle to move toward the distal end of the housing, while the retracting connecting rod assembly remains stationary. When the push-needle connecting rod assembly completes the delivery of the ocular implant, the push-needle connecting rod assembly no longer moves. When the rotating wheel continues to be rotated, it can drive the retracting connecting rod to move toward the proximal direction, thereby realizing the linear contraction of the puncture needle and improving the safety of the operation.

[0008] As a further improvement of the above scheme, the first rack on the push-pin connecting rod assembly is arranged below the rotating shaft of the rotating wheel, the rack on the retracting connecting rod assembly is arranged above the rotating shaft of the rotating wheel, the sector gear on the rotating shaft of the rotating wheel corresponding to the rack of the push-pin connecting rod assembly is meshed with the first rack on the push-pin connecting rod assembly in the initial state, and the sector gear on the rotating shaft of the rotating wheel corresponding to the rack of the retracting connecting rod assembly is located at the lower part of the rotating shaft in the initial state. The principle of this scheme is exactly the same as the above scheme, except that when performing an eye implant delivery operation, the rotating wheel rotates toward the proximal end of the housing.

[0009] As a further improvement of the above scheme, the central angle range of the sector gear is 30°-180°. Through this arrangement, both the push-needle connecting rod assembly and the retracting connecting rod assembly can have sufficient movable distance to ensure the smooth completion of the eye implantation surgery, and only one of the push-needle connecting rod assembly and the retracting connecting rod assembly can be in a moving state to avoid the push-needle connecting rod assembly and the retracting connecting rod assembly moving at the same time to affect the operation.

[0010] As a further improvement of the above scheme, the push-pin connecting rod assembly includes a push-pin, a push-pin connecting rod and a first rack, the proximal end of the push-pin is fixedly connected to the distal end of the push-pin connecting rod, the proximal end of the push-pin connecting rod is fixedly connected to the first rack, the first rack is horizontally arranged, and the teeth on the first rack are arranged toward the rotating shaft. Through this arrangement, the push-pin connecting rod assembly can be driven to move toward the distal end by rotating the rotating wheel, so as to realize the delivery of the eye implant to the patient's eye surgical site, and ensure the smooth completion of the operation.

[0011] As a further improvement of the above scheme, the retraction connecting rod assembly includes a connector, a retraction connecting rod and a second rack, the connector is fixedly connected to the distal end of the retraction connecting rod, the connector is used to connect the puncture needle, the second rack is fixedly connected to the proximal end of the retraction connecting rod, the second rack is horizontally arranged, and the teeth on the second rack are arranged toward the rotating shaft. Through this arrangement, the retraction connecting rod assembly can be driven to move toward the proximal direction by rotating the rotating wheel, and the puncture needle can be retracted after the implant is delivered, ensuring that the needle is retracted in a straight line during the retraction process, thereby improving the safety of the operation.

[0012] As a further improvement of the above solution, the proximal end of the sleeve is fixedly connected to the sleeve seat, the sleeve seat is arranged in a position close to the through hole in the shell, and the sleeve passes through the through hole on the shell and extends to the outside of the shell. Through this arrangement, the connection between the sleeve and the shell can be made more secure, and it is convenient for the puncture needle to pass through the sleeve to puncture the position where the ocular implant needs to be delivered.

[0013] As a further improvement of the above scheme, a puncture needle seat is provided at the proximal end of the puncture needle, the puncture needle and the puncture needle seat are fixedly connected, the puncture needle passes through the sleeve, and the puncture needle seat is fixedly connected to the distal end of the withdrawal connecting rod assembly. Through this arrangement, the puncture needle can be fixedly connected to the withdrawal connecting rod assembly, so that after the implantation of the eye implant is completed, the puncture needle shrinks together with the withdrawal connecting rod assembly to achieve a straight needle retraction, thereby improving the safety of the operation.

[0014] As a further improvement of the above scheme, the shell includes an upper shell and a lower shell, the upper shell and the lower shell are fixedly connected, and both the upper shell and the lower shell include a rod, a gripping portion and a conical portion, the rod, the gripping portion and the conical portion are fixedly connected; a rotating wheel assembly seat is provided on the inner wall of the rod of the shell, and the rotating wheel is assembled on the rotating wheel assembly seat through a rotating shaft; a limiting block is provided on the inner wall surface of at least one of the rod, the gripping portion and the conical portion, and the limiting block is used to limit the push needle connecting rod assembly and the retraction connecting rod assembly in the radial direction. By providing the gripping portion, it is convenient for the doctor to hold the ocular implant delivery device for surgery, and by providing the rotating wheel assembly seat, it is convenient to assemble the rotating wheel and enable the rotating wheel to rotate flexibly. By providing the limiting block in the shell, the push needle connecting rod and the retraction connecting rod can be radially limited to prevent them from radially offsetting, thereby improving the accuracy of the surgery.

[0015] As a further improvement of the above scheme, teeth are provided on the outer peripheral surface of the rotating wheel, an operating sleeve is provided at a position corresponding to the opening on the housing, the operating sleeve is slidably matched with the housing, and a rack part meshing with the teeth on the rotating wheel is provided on the inner wall of the operating sleeve. By providing the operating sleeve, it is convenient for the doctor to push the operating sleeve by hand to perform the operation. Compared with the scheme of directly rotating the rotating wheel to perform the operation, the flexibility and convenience of the operation of the ocular implant conveyor can be greatly improved, making the operation process more labor-saving and more efficient.

[0016] As a further improvement of the above scheme, a spring sheet is provided on the outer wall of the shell, which extends to the outside of the shell and cooperates with the rack portion on the inner wall of the operating sleeve. By providing the spring sheet, the doctor will have obvious tactile feedback when pushing the operating sleeve to perform surgery. Every time the rotating wheel moves a tooth, the spring sheet will engage with the tooth, which can effectively prevent the rotating wheel from rotating in the opposite direction due to misoperation during surgery, thereby improving the safety of the operation of the ocular implant conveyor. In addition, by providing the spring sheet, the doctor can avoid using too much force during surgery and the rotating wheel rotating too fast, which will affect the quality of the surgery, further improving the safety of the surgery.

[0017] It should be noted that the distal end mentioned above refers to the end away from the doctor during eye implant surgery, and the proximal end refers to the end closer to the doctor during eye implant surgery, or it can be interpreted that the distal end refers to the end close to the patient's eye that needs surgery, and the proximal end is the end away from the patient's eye.

[0018] The present invention has positive effects: 1) The ocular implant delivery device of the present invention can first drive the push needle connecting rod assembly to move toward the distal end of the shell through the rotation of the rotating wheel to realize the delivery of the ocular implant. After the ocular implant is delivered in place, when the rotating wheel continues to rotate, the push needle connecting rod assembly no longer moves, and the withdrawal connecting rod assembly drives the puncture needle to the proximal end of the shell to perform a needle retraction operation. Through this arrangement, the structure of the ocular implant delivery device can be simplified. During the ocular implant delivery process, the push needle can only move in a straight line, thereby improving the accuracy of the operation. After the ocular implant delivery is completed, the puncture needle can be retracted in a straight line, thereby improving the safety of the operation; 2) The ocular implant delivery device of the present invention, The internal driving assembly structure is greatly simplified, and only two sets of sector gears and rack transmission mechanisms are used to complete the required movement of the push-pin connecting rod assembly and the retraction connecting rod assembly, and the moving distance of the push-pin connecting rod assembly and the retraction connecting rod assembly is more accurate, and can be accurately calculated by the length of the meshing part of the sector gear and the rack, further improving the accuracy of the operation; 3) The eye implant delivery device of the present invention can complete the surgical operation by unidirectional rotating the wheel, which is easy to operate, and the friction between the wheel and the shell is very small. The force of rotating the wheel can be transmitted to the gear rack mechanism, and there is basically no loss of pushing force, the surgical operation is more labor-saving, and the system stability and reliability are higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of the ocular implant delivery device according to Example 1 of the present invention.

[0020] Figure 2 Schematic diagram of the internal structure of the ocular implant delivery device according to Example 1 of the present invention.

[0021] Figure 3 It is a schematic diagram of the connection structure between the push-pin connecting rod assembly, the retracting connecting rod assembly and the rotating wheel.

[0022] Figure 4 This is a schematic diagram of the structure of Example 3.

[0023] Figure 5 for Figure 4 AA section view in.

[0024] The reference numerals in the figure are: shell 1, rod 11, gripping portion 12, conical portion 13, through hole 14, opening 15, limit block 16, rotary wheel assembly seat 17, sleeve 2, puncture needle 3, puncture needle seat 31, rotary wheel 4, rotating shaft 41, fan gear 42, tooth 43, push needle connecting rod assembly 5, push needle 51, push needle connecting rod 52, first rack 53, withdrawal connecting rod assembly 6, connecting head 61, withdrawal connecting rod 62, second rack 63, operating sleeve 7, rack 71, spring piece 72, implant 8, plug 81. DETAILED DESCRIPTION

[0025] The technical scheme of the present invention is clearly and completely described below through embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1

[0027] like Figure 1-3 An ocular implant delivery device shown includes a housing 1 , a sleeve 2 , a puncture needle 3 , a rotating wheel 4 , a needle-pushing connecting rod assembly 5 and a withdrawing connecting rod assembly 6 .

[0028] The housing 1 is a split molded part, and the structure of the housing 1 can be selected in many ways, for example, Figure 2 As shown, the housing 1 is divided into an upper housing and a lower housing from the proximal end to the distal end, and the upper housing and the lower housing can be fixedly connected by glue, buckles, or bolts. Another solution is that the housing is divided into two parts along the longitudinal direction, and the two parts are connected by threaded connection, buckle connection, glue fixing connection, etc.

[0029] The following is attached Figure 1The structure shown is used as an example for explanation. The housing 1 includes an upper housing and a lower housing. The upper housing and the lower housing are fixedly connected. The upper housing and the lower housing are respectively a rod 11, a gripping portion 12 and a conical portion 13 from the proximal end to the distal end. The rod 11, the gripping portion 12 and the conical portion 13 are fixedly connected or integrally formed. A through hole 14 for connecting the sleeve 2 is provided in the conical portion 13. By providing the gripping portion 12, it is convenient for the doctor to hold the ocular implant delivery device during surgery. The specific shape of the housing 1 can also be adjusted and designed according to the convenience of operation.

[0030] like Figure 2 As shown, a rotating wheel assembly seat 17 is provided on the inner wall surface of the rod portion of the housing 1, and the rotating wheel 4 is assembled on the rotating wheel assembly seat 17 through a rotating shaft. The rotating wheel assembly seat 17 is provided to facilitate the assembly of the rotating wheel 4 and enable the rotating wheel 4 to rotate flexibly.

[0031] An opening 15 is provided on the housing 1 at a position corresponding to the rotating wheel 4, so that the doctor or other surgical operator can operate the surgical procedure by rotating the rotating wheel at the opening 15. As an alternative, the outer periphery of the rotating wheel 4 can be partially protruded from the opening or aligned with the opening of the housing 1.

[0032] Inside the housing 1, a limit block 16 is provided on the inner wall surface of at least one of the rod portion 11, the grip portion 12 and the conical portion 13, and the limit block 16 is used to limit the radial position of the push-needle connecting rod assembly 5 and the retraction connecting rod assembly 6. By providing sufficient limit on the housing 1, the retraction connecting rod 62 and the push-needle connecting rod 52 can be prevented from being deviated radially in the housing 1, thereby improving the accuracy of the surgery.

[0033] Combination Figure 2 As shown, a sleeve 2 is provided at the distal end of the housing 1. The sleeve 2 is a hollow tubular object, which is fixedly connected to the distal through hole 14 of the housing 1 by gluing or injection molding or other clamping mechanisms. The function is to protect the needle tube of the puncture needle 3 and to support the trabecular meshwork tissue when the puncture needle 3 enters the subconjunctival cavity during the operation, thereby limiting the insertion length of the puncture needle.

[0034] As a more preferred embodiment, a sleeve seat is provided at the proximal end of the sleeve 2, and the sleeve 2 is fixedly connected to the sleeve seat by gluing or injection molding. The sleeve seat is arranged in a position near the through hole 14 in the housing 1, and the sleeve 2 is fixedly connected to the housing 1, and the connection method can be a fixed connection method such as gluing, injection molding or clamping. The puncture needle 3 is a needle with a hollow cylindrical structure, and its material can be a material specified in the medical field, and an oblique opening is provided at the needle tip of the puncture needle 3. The puncture needle 3 passes through the hole of the sleeve 2, and the puncture needle 3 and the inner wall of the sleeve 2 are gap-matched, so that the puncture needle 3 can pass freely in the sleeve 2. The puncture needle 3 can be directly fixedly connected to the distal end of the withdrawal connecting rod assembly 6, or the puncture needle 3 can be fixedly connected to the puncture needle seat 31 by gluing or injection molding, or other clamping mechanisms, and the puncture needle seat 31 is then fixedly connected to the withdrawal connecting rod assembly 6.

[0035] The puncture needle 3 can pass through the hollow hole of the cannula 2 and extend to the outer side of the distal end of the cannula 2. The oblique opening of the puncture needle 3 completely exposes a distance of the cannula 2, thereby controlling the depth of the puncture needle 3 penetrating into the conjunctiva of the eye. The puncture needle 3 and the puncture needle seat 31 are limited in the internal space composed of the upper and lower shells, and can only be withdrawn, and cannot move toward the distal end.

[0036] The implant 8 can be a tubular object made of a flexible material, and the tubular inner cavity of the implant 8 forms an aqueous humor outflow channel. The implant 8 has a certain arch along the axial direction. Before the operation, the implant 8 is placed in the inner cavity of the puncture needle 3 and is pushed to the far end of the needle. A certain friction force is generated between the outer wall of the implant 8 and the inner wall of the puncture needle 3, which can stabilize the position of the implant 8 in the hole of the puncture needle 3.

[0037] like Figure 2 and 3 The two ends of the rotating shaft 41 extend to the two sides of the rotating wheel respectively. The rotating shafts on both sides of the rotating wheel 4 are respectively provided with sector gears 42. The central angle range of the sector gear 42 is 30°-180°. Figure 2 and 3 In the scheme shown, the central angle of the sector gear 42 is 30°-60°. Through this arrangement, both the push-needle connecting rod assembly 5 and the retracting connecting rod assembly 6 can have sufficient movable distance to ensure the smooth completion of the eye implantation surgery, and only one of the push-needle connecting rod assembly 5 and the retracting connecting rod assembly 6 can be in a moving state to avoid the push-needle connecting rod assembly 5 and the retracting connecting rod assembly 6 moving at the same time to affect the operation.

[0038] like Figure 2 and 3As shown, the push-pin connecting rod assembly 5 includes a push pin 51, a push-pin connecting rod 52 and a first rack 53. The proximal end of the push pin 51 is fixedly connected to the distal end of the push-pin connecting rod 52, and the proximal end of the push-pin connecting rod is fixedly connected to the first rack 53. The first rack 53 is horizontally arranged, and the teeth on the first rack 53 are arranged toward the rotating shaft 41.

[0039] like Figure 2 and 3 As shown, the retraction link assembly 6 includes a connector 61, a retraction link 62 and a second rack 63. The connector 61 is fixedly connected to the distal end of the retraction link 62. The connector 61 is used to connect the puncture needle 3. The second rack 63 is fixedly connected to the proximal end of the retraction link 62. The second rack 63 is horizontally arranged, and the teeth on the second rack 63 are arranged toward the rotating shaft 41.

[0040] As a first implementation scheme, the rack 53 on the push-pin connecting rod assembly 5 is arranged above the rotating shaft 41 of the rotating wheel, and the second rack 63 on the retracting connecting rod assembly 6 is arranged below the rotating shaft 41 of the rotating wheel, and the fan-shaped gear 42 corresponding to the first rack 53 on the rotating shaft 41 of the rotating wheel is meshed with the first rack 53 on the push-pin connecting rod assembly 5 in the initial state, that is, in the initial state, the fan-shaped gear 42 corresponding to the first rack 53 on the rotating shaft 41 of the rotating wheel is located at the upper part of the rotating shaft 41, and the fan-shaped gear 42 corresponding to the second rack 63 on the rotating shaft 41 of the rotating wheel is also located at the upper part of the rotating shaft 41 in the initial state.

[0041] It should be noted that the above and below here are relative concepts, which are relative concepts between the rack and the rotating shaft. It means that for the operator, relative to the rotating shaft, the rack of the push-pin connecting rod assembly and the rack of the retraction connecting rod assembly are at the top and the bottom.

[0042] When the wheel is rotated, the corresponding sector gear 42 rolls along the first rack 53 until it is disengaged from the first rack 53, and the push-pin connecting rod assembly completes its movement toward the distal end; when the wheel is rotated, the sector gear 42 corresponding to the second rack 63 is also located at the upper part of the shaft 41, that is, the second rack 62 is disengaged from the corresponding sector gear 42, and in the process of the push-pin connecting rod assembly moving toward the distal end, a disengaged state is maintained until the push-pin connecting rod assembly completes its movement toward the distal end, and the second rack 62 is just in the meshing state of the initial contact with the corresponding sector gear 42. When the wheel continues to be rotated, the corresponding sector gear 42 rolls along the second rack 62, thereby realizing the movement of the retracting connecting rod assembly toward the proximal end. Therefore, both the push-pin link assembly 5 and the retract link assembly 6 can achieve advancement and retraction in sequence.

[0043] It can be understood that in other application scenarios, in the initial state, the first rack 53 and the corresponding sector gear 42 may not be in the initial contact meshing, but after the wheel rotates a certain angle (the push-pin connecting rod assembly is in a stationary state when the rotation angle is here), the two are in the initial contact meshing; similarly, the second rack 53 and the corresponding sector gear 42 may not be in the initial contact meshing after the push-pin connecting rod assembly 5 has just completed moving toward the distal direction, but after the wheel 4 continues to rotate a certain angle (the retraction connecting rod assembly is in a stationary state when the rotation angle is here), the two are in the initial contact meshing.

[0044] Through this arrangement, when the rotating wheel is rotated toward the distal direction of the shell 1, the push-needle connecting rod assembly 5 can drive the push-needle connecting rod assembly 5 to move toward the distal direction of the shell 1, while the retraction connecting rod assembly 6 remains stationary. When the push-needle connecting rod assembly 5 completes the delivery of the eye implant 8, when the rotating wheel continues to be rotated, the push-needle connecting rod assembly 5 no longer moves, and the retraction connecting rod assembly 6 moves toward the proximal direction, thereby realizing the linear contraction of the puncture needle 3 and improving the safety of the operation.

[0045] The ocular implant delivery device of this embodiment can complete the delivery operation of the ocular implant 8 and the retracting operation of the puncture needle 3 by rotating the rotating wheel 4 when performing an ocular implant delivery operation, thereby completing the ocular implant operation.

[0046] The specific process is that in the initial state, on the side of the rotating wheel 4 corresponding to the push-pin connecting rod assembly 5, the fan gear 42 on the rotating shaft 41 is located at the upper part of the rotating shaft 4, and the fan gear 42 is meshed with the first rack 53, and the fan gear 42 on the rotating shaft 41 on the other side of the rotating wheel 4 is also located at the upper part of the rotating shaft 4, and the second rack 63 at the proximal end of the withdrawal connecting rod 62 is located at the lower part of the rotating shaft 4, so the second rack 63 is not meshed with the fan gear 42 on the rotating shaft 4.

[0047] The implant 8 is pre-installed in the inner hole of the puncture needle 3, against the push needle 51 of the push needle connecting rod assembly 5, and the distal end of the implant 8 is limited by a plug 81 to prevent the implant 8 from falling. Before implantation, the plug 81 is pulled out to unlock the ocular implant delivery device, and then the puncture needle 3 is used to puncture the surgical site of the patient. Because the length of the puncture needle 3 leaking out of the cannula 2 is fixed, the cannula 2 can limit the puncture depth of the puncture needle 3. After the puncture is completed, the implantation operation begins.

[0048] In the first stage Figure 2 As shown in the direction of the arrow, the wheel 4 is rotated toward the far end, as shown in the direction of the arrow. Figure 3As shown in the direction of the arrow, the sector gear 42 on the rotating shaft 41 is meshed with the first rack 53 at the proximal end of the push-needle connecting rod assembly 5, thereby driving the push-needle connecting rod assembly 5 to move toward the distal end of the housing 1, pushing the implant 8 through the puncture hole to reach the patient's intraocular subconjunctival cavity, completing the delivery operation of the eye implant 8; at the same time, Figure 2 As shown in the direction of the arrow in FIG. 4 , the sector gear 42 on the rotating shaft 41 on the other side of the rotating wheel 4 is not engaged with the second rack 63 on the withdrawing connecting rod assembly 6, so the withdrawing connecting rod assembly 6 will not move in the axial direction.

[0049] When the rotating wheel 4 continues to rotate toward the distal direction to enter the second stage, the first rack 53 is separated from the corresponding fan-shaped gear 42, so that the rotating wheel 4 no longer drives the needle push connecting rod assembly 5 to move, and the second rack 63 gradually engages with the fan-shaped gear 42 on the corresponding side. Because the second rack 63 is located below the fan-shaped gear 42, when the rotating wheel continues to rotate, it can drive the withdrawal connecting rod assembly 6 to move toward the proximal direction. Because a limit block 16 is provided in the shell 1, the radial movement of the withdrawal connecting rod 62 can be limited, so that it can only move along the axial direction of the shell 1 toward the proximal direction, driving the puncture needle 3 to move into the sleeve 2, and completing the needle retracting operation.

[0050] At this point, the delivery operation of the eye implant is completed. For doctors and other operators, they only need to operate the rotating wheel 4 to complete the implant delivery process, which is simple and easy.

[0051] Example 2

[0052] On the basis of Example 1, different from Example 1, the first rack 53 is arranged below the rotating shaft 41 of the rotating wheel, the second rack 63 is arranged above the rotating shaft 41 of the rotating wheel, and the sector gear 42 on the rotating shaft 41 of the rotating wheel corresponding to the first rack 53 is meshed with the first rack 53 on the push-pin connecting rod assembly 5 in the initial state, that is, the sector gear 42 on the rotating shaft 41 of the rotating wheel corresponding to the first rack 53 is located at the lower part of the rotating shaft 41 in the initial state, and the sector gear 42 on the rotating shaft 41 of the rotating wheel corresponding to the second rack 63 is located at the lower part of the rotating shaft 41 in the initial state. The principle of this scheme is exactly the same as that of the above-mentioned Example 1, except that when performing the delivery operation of the ocular implant, the rotating wheel 4 rotates toward the proximal direction of the housing 1.

[0053] The structure and working principle of this embodiment are basically the same as those of Embodiment 1, except that the first rack 53 and the second rack 63 are arranged at positions opposite to those of Embodiment 1, and during the operation, the initial position and the rotation direction of the rotating wheel 4 are opposite to those of Embodiment 1. Although there are no drawings to illustrate this embodiment, it does not affect the understanding of the technical personnel of this embodiment.

[0054] The ocular implant delivery device of this embodiment can complete the delivery operation of the ocular implant 8 and the retracting operation of the puncture needle 3 by rotating the rotating wheel 4 when performing an ocular implant delivery operation, thereby completing the ocular implant operation.

[0055] The specific process is that in the initial state, on the side of the rotating wheel 4 corresponding to the push-pin connecting rod assembly 5, the fan gear 42 on the rotating shaft 41 is located at the lower part of the rotating shaft 41, and the fan gear 42 is meshed with the first rack 53, and the fan gear 42 on the rotating shaft 41 on the other side of the rotating wheel 4 is also located at the lower part of the rotating shaft 41, and the second rack 63 at the proximal end of the withdrawal connecting rod 62 is located at the upper part of the rotating shaft 41, so the second rack 63 is not meshed with the fan gear 42 on the rotating shaft 41.

[0056] The implant 8 is pre-installed in the inner hole of the puncture needle 3, against the push needle 51 of the push needle connecting rod assembly 5, and the distal end of the implant 8 is limited by a plug 81 to prevent the implant 8 from falling. Before implantation, the plug 81 is pulled out to unlock the ocular implant delivery device, and then the puncture needle 3 is used to puncture the surgical site of the patient. Because the length of the puncture needle 3 leaking out of the cannula 2 is fixed, the cannula 2 can limit the puncture depth of the puncture needle 3. After the puncture is completed, the implantation operation begins.

[0057] In the first stage, you can refer to Figure 2 , but with Figure 2 The rotating wheel 4 is rotated in the direction opposite to the middle arrow toward the proximal end of the shell, and the sector gear 42 on the rotating shaft 41 is meshed with the first rack 53 at the proximal end of the push-needle connecting rod assembly 5, thereby driving the push-needle connecting rod assembly 5 to move toward the distal end of the shell 1, pushing the implant 8 through the puncture hole to reach the patient's intraocular subconjunctival cavity, completing the delivery operation of the ocular implant 8; at the same time, the sector gear 42 on the rotating shaft 41 on the other side of the rotating wheel is not meshed with the second rack 63 on the retraction connecting rod assembly 6, so the retraction connecting rod assembly 6 will not move in the axial direction.

[0058] When the rotating wheel 4 continues to rotate toward the proximal direction to enter the second stage, the first rack 53 is separated from the corresponding fan-shaped gear 42, so that the rotating wheel 4 no longer drives the needle push connecting rod assembly 5 to move, and the second rack 63 gradually engages with the fan-shaped gear 42 on the corresponding side. Because the second rack 63 is located above the fan-shaped gear 42, when the rotating wheel 4 continues to rotate, it can drive the withdrawal connecting rod assembly 6 to move toward the proximal direction. Because a limit block 16 is provided in the shell 1, the radial movement of the withdrawal connecting rod 62 can be limited, so that it can only move along the axial direction of the shell 1 toward the proximal direction, driving the puncture needle 3 to move into the sleeve 2, and completing the needle retracting operation.

[0059] At this point, the delivery operation of the eye implant is completed. For doctors and other operators, they only need to operate the rotating wheel 4 to complete the implant delivery process, which is simple and easy.

[0060] Example 3

[0061] like Figure 4 and 5 As shown, on the basis of Embodiment 1 or 2, teeth 43 are provided on the outer peripheral surface of the rotating wheel, an operating sleeve 7 is provided at a position corresponding to the opening on the housing, the operating sleeve 7 is slidably matched with the housing 1, and a rack portion 71 meshing with the teeth 43 on the rotating wheel 4 is provided on the inner wall of the operating sleeve 7. By providing the operating sleeve 7, it is convenient for the doctor to push the operating sleeve by hand to perform the operation. Compared with the solution of directly rotating the rotating wheel to perform the operation, the flexibility and convenience of the operation of the ocular implant conveyor can be greatly improved, making the operation process more labor-saving and more efficient.

[0062] As a more optimized implementation scheme, Figure 5 As shown, a spring sheet 72 is provided on the outer wall of the housing 1, and the spring sheet 72 extends to the outside of the housing 1 and cooperates with the rack portion 71 on the inner wall of the operating sleeve 7. By providing the spring sheet 72, the doctor will have obvious tactile feedback when pushing the operating sleeve 7 to perform surgery. Every time the rotating wheel 4 moves a tooth, the spring sheet 72 will be combined with the tooth 43, which can effectively prevent the reverse rotation of the rotating wheel due to misoperation during surgery, thereby improving the safety of the operation of the ocular implant conveyor. In addition, by providing the spring sheet, it can be prevented that the doctor uses too much force during surgery and the rotating wheel rotates too fast, which affects the quality of the surgery, and further improves the safety of the surgery.

[0063] When the ocular implant delivery device of the present embodiment is used, the implant 8 that meets the surgical conditions is first loaded into the sterile puncture needle 3, and then the patient's eye is treated accordingly according to the surgical conditions, such as anesthesia, sterilization, etc. When the operation is to be performed, the puncture needle 3 of the ocular implant delivery device is used to puncture the part of the patient where the ocular implant needs to be implanted. The puncture depth of the puncture needle 3 can be limited by the sleeve 2 to improve the accuracy of the operation. After the puncture is in place, the doctor holds the holding portion of the ocular implant delivery device and slowly pushes the operating sleeve 7 toward the distal end or proximal end of the shell 1. The operating sleeve can drive the rotating wheel to rotate, and then can first drive the push needle connecting rod assembly to move toward the distal end of the shell 1. Because a limit block 16 for limiting the push needle connecting rod 52 is provided in the shell 1, the radial displacement of the push needle connecting rod 52 can be avoided, so that it can only move linearly toward the distal end of the shell 1, driving the push needle 51 to move toward the puncture needle 3, and pushing the ocular implant through the puncture hole 3 to reach the patient's intraocular subconjunctival cavity. Continue to push the operating sleeve 7 in the same direction, and the retracting connecting rod 62 will move toward the proximal end of the housing. During the movement, because the retracting connecting rod 62 is affected by the limit block 16 in the housing 1, it can only move linearly from the distal end to the proximal end of the housing 1, driving the puncture needle 3 to retract into the sleeve 2, completing the needle retraction operation. The ocular implant delivery device is used to deliver the implant 8 to a specific position in the eye, and the tubular inner cavity of the implant 8 forms an aqueous humor outflow channel to discharge the aqueous humor in the eye, thereby achieving the purpose of reducing intraocular pressure.

[0064] The ocular implant delivery device of the present invention has a compact structure, ingenious design, and is easy to operate. It can greatly improve the accuracy, safety, and efficiency of surgery, reduce the difficulty and risk of surgical operations, alleviate the pain of patients, and improve the success rate of surgery.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ocular implant delivery device, characterized in that: It includes a shell, a rotating wheel, a needle-pushing connecting rod assembly, a retraction connecting rod assembly, a sleeve and a puncture needle. A through hole is provided in the direction of the distal end of the shell. The sleeve passes through the through hole from the shell and extends to the outside of the shell. The sleeve is fixedly connected to the shell. The puncture needle passes through the sleeve. The proximal end of the puncture needle is fixedly connected to the retraction connecting rod assembly. The push needle of the needle-pushing connecting rod assembly passes through the inner hole of the puncture needle. The rotating wheel is connected to the shell through a rotating shaft. An opening corresponding to the rotating wheel is provided on the shell. The rotating wheel is respectively connected to the needle-pushing connecting rod assembly and the retraction connecting rod assembly through a gear rack mechanism. With the rotation of the rotating wheel, the needle-pushing connecting rod assembly can be driven to move toward the distal end of the shell or the retraction connecting rod assembly can be driven to move in a direction away from the distal end of the shell. Sector gears are respectively provided on the rotating shafts on both sides of the rotating wheel, a first rack is provided at the proximal end of the push-pin connecting rod assembly, and a second rack is provided at the proximal end of the retracting connecting rod assembly, the first rack and the second rack are respectively arranged on the left and right sides of the rotating wheel, one of the first rack and the second rack is arranged above the rotating shaft of the rotating wheel, and the other is arranged below the rotating shaft of the rotating wheel, the first rack and the second rack can respectively engage with the sector gears on the corresponding sides, the sector gear corresponding to the first rack on the rotating shaft of the rotating wheel is engaged with the first rack in an initial state, and the teeth of the sector gear corresponding to the second rack on the rotating shaft of the rotating wheel are located at a position opposite to the second rack in an initial state.

2. The ocular implant delivery device according to claim 1, characterized in that: The central angle of the sector gear ranges from 30° to 180°.

3. The ocular implant delivery device according to claim 1, characterized in that: The push pin connecting rod assembly includes a push pin, a push pin connecting rod and a first rack. The proximal end of the push pin is fixedly connected to the distal end of the push pin connecting rod, and the proximal end of the push pin connecting rod is fixedly connected to the first rack. The first rack is horizontally arranged, and the teeth on the first rack are arranged toward the rotating shaft.

4. The ocular implant delivery device according to claim 1, characterized in that: The retraction link assembly includes a connecting head, a retraction link and a second rack, the connecting head is fixedly connected to the distal end of the retraction link, the second rack is fixedly connected to the proximal end of the retraction link, the second rack is horizontally arranged, and the teeth on the second rack are arranged toward the rotating shaft.

5. The ocular implant delivery device according to claim 1, characterized in that: The proximal end of the sleeve is fixedly connected to the sleeve seat, the sleeve seat is arranged in a position close to the through hole in the shell, and the sleeve passes through the through hole on the shell and extends to the outside of the shell.

6. The ocular implant delivery device according to claim 1, characterized in that: The proximal end of the puncture needle is provided with a puncture needle seat, the puncture needle and the puncture needle seat are fixedly connected, the puncture needle passes through the sleeve, and the puncture needle seat is fixedly connected to the distal end of the retracting connecting rod assembly.

7. The ocular implant delivery device according to claim 1, characterized in that: The shell comprises an upper shell and a lower shell, which are fixedly connected, and both comprise a rod portion, a grip portion and a conical portion, which are fixedly connected; a rotating wheel assembly seat is provided on the inner wall of the rod portion of the shell, and the rotating wheel is assembled on the rotating wheel assembly seat through a rotating shaft; a limiting block is provided on the inner wall surface of at least one of the rod portion, the grip portion and the conical portion, and the limiting block is used to radially limit the push-pin connecting rod assembly and the retraction connecting rod assembly.

8. The ocular implant delivery device according to claim 1, characterized in that: The outer circumference of the rotating wheel is provided with teeth, an operating sleeve is provided at a position corresponding to the opening on the shell, the operating sleeve is slidably matched with the shell, and a rack part meshing with the teeth on the rotating wheel is provided on the inner wall of the operating sleeve.

9. The ocular implant delivery device according to claim 8, characterized in that: An elastic sheet is arranged on the outer wall of the shell, and the elastic sheet extends to the outside of the shell and matches with the rack part on the inner wall of the operating sliding sleeve.

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