CN210204985U - Pre-assembled intraocular lens implantation device - Google Patents

Abstract

The utility model provides a pre-assembled artificial lens implantation device for improving the action reliability of a front supporting loop of an artificial lens. A pin hole (201) is formed in an intraocular lens injector (1), the pin hole (201) being located between the optical portion (6) of the intraocular lens (5) and the front end portion (7a2) of the front haptic (7a) in the front-rear direction, a stopper seat having a stopper pin (42) inserted into the implant head (2) through the pin hole and located between the optical portion (6) of the intraocular lens (5) and the front end portion (7a2) of the front haptic (7a) to restrict forward movement of the intraocular lens (5), the front surface of the stopper pin (42) facing the front end portion (7a2) of the front haptic (7a) having a guide surface (42b), the guide surface (42b) being constituted by a slope extending obliquely upward and rearward.

Description

Pre-assembled intraocular lens implantation device

Technical Field

The utility model relates to a device is implanted to prepackage type intraocular lens.

Background

An intraocular lens is an artificial lens, and a technique for replacing a natural intraocular lens in a human eye, which has become clouded due to cataract disease, by implanting the intraocular lens in cataract surgery has been widely practiced.

Intraocular lens forms typically consist of a centrally located circular optic and peripheral haptics. Intraocular lenses can be classified as rigid intraocular lenses and soft intraocular lenses, depending on the material from which they are made. Hard intraocular lenses are not foldable due to the material, and implantation of an intraocular lens can be performed only by making an incision on the cornea that has a diameter and width substantially the same as the diameter and width of the lens optic. The soft artificial lens is soft and foldable, and the soft artificial lens with the area reduced by folding or rolling can be implanted into the eye by making a small operation incision (generally 2-3 mm) on the cornea. The folded or rolled intraocular lens can automatically unfold after entering the eye due to the characteristics of the soft material.

In order to implant a soft intraocular lens into an eye, it is necessary to use a specialized intraocular lens implantation instrument having a lumen design for folding the intraocular lens and an elongated tubular access structure design. By using this special intraocular lens implanting instrument, a soft intraocular lens can be implanted into a human eye through a small incision of less than 3 mm. The special intraocular lens implanter can be divided into a pre-assembled intraocular lens implanter and a non-pre-assembled intraocular lens implanter according to whether or not an intraocular lens product is built in.

The ideal intraocular lens rolled or curled state is a state in which the lower surface of the lens optic is folded over the upper surface of the optic, while the anterior and posterior haptics of the lens are folded over the upper surface of the optic and are enclosed within the folded optic. In the structural design process of the pre-assembled intraocular lens implanter, because the crystal is placed in the back of the crystal bearing area of the implanter and the back supporting tab is close to the injection part of the implanter, the injection part can push the back supporting tab forward to turn over when injecting, so that the action of turning the back supporting tab over the upper surface of the lens part is easy, and how to ensure and improve the action reliability of turning the front supporting tab over the upper part of the lens part is a problem that the pre-assembled intraocular lens implanter needs to be considered and is difficult to realize in the design.

In addition, the design of the pre-assembly type intraocular lens implanter also needs to consider how to pre-arrange the intraocular lens in the implanter, ensure that the position and the state of the pre-arranged intraocular lens are not influenced by factors such as transportation, transportation and the like, and simplify the operation steps of implanting the intraocular lens.

The action of folding the front lens loop of the pre-installed intraocular lens over the lens part can be realized only by matching the special section design of the special cavity of the transition part of the implantation head, namely, the front lens loop contacts with the side surface of the cavity of the transition part of the implantation head in the process of moving from the transition part of the implantation head to the tubular nozzle of the implantation head after the start of the injection action, so that the front lens loop is prevented from advancing due to the contact, but the lens part still continues to move forwards under the action of the injection part at the moment, so that the front lens loop is folded, the lens part continues to move forwards, and the front lens loop continues to be folded, so that the action of folding over the upper surface of the lens part is realized.

The above is the implementation process of the action of turning over the anterior holding loop in the process of pushing the anterior holding loop in the theoretical state, but because the state of the anterior holding loop preset in the implanter is theoretically not constrained, the state of the anterior holding loop in the actual operation process is likely to be influenced by the filling of viscoelastic agent, i.e. the flow of the filled viscoelastic agent is likely to push the anterior holding loop away from the theoretical state, so that the anterior holding loop is thrown out forwards or folded backwards, and finally the anterior holding loop deviates from the theoretical state and the turning-over can not be smoothly implemented

In addition, patent document 1(US9572710B1) and patent document 2(US7156854B2) disclose a one-piece type L-shaped haptic-structured intraocular lens preloaded intraocular lens implanter, respectively. The problems of the pre-assembly intraocular lens implanter of the above patent document, such as how to fold the anterior haptic, how to prevent the lens from moving toward the head, the design of the limiting structure, and the injection operation steps, will now be briefly described.

The operation of the pre-loaded intraocular lens implanter of patent document 1 is as follows: firstly, a viscoelastic agent is poured, then a limiting seat assembled above the front surface of an implant head component of the pre-assembled intraocular lens implant is taken down to cancel the constraint of forward movement of the lens component, the implant is taken down from the whole support frame component of the implant, and the first sliding component slides to push the injector injection component to complete the lens implantation injection action. The pre-assembled intraocular lens implanter of patent document 1 is configured such that a stopper seat is provided above the head part, and a stopper pin feature of the stopper seat passes through a fitting hole of the upper wall of the head and is positioned just in front of the anterior apex of the edge of the lens optic part, thereby functioning to restrict forward movement of the lens before implantation. Patent document 1 discloses that an implantation head inner cavity transition part is located in front of a main body crystal bearing area, two oblique rib features are designed on the left side and the right side of the lower bottom surface of the inner surface of the transition part, a front support haptic and a crystal optical part are lifted when passing through the oblique rib features in the process of injecting an intraocular lens, the crystal optical part is subsequently stressed by a force pointing to the lower bottom surface of the transition part under the action of a pressing sheet at the front end of a first sliding part of an implanter, so that the front support haptic of the crystal is higher than the upper surface of the crystal optical part, and the front support haptic is subsequently folded over the crystal optical part under the matching action of the side wall of the implantation head transition part. In summary, the pre-assembly type intraocular lens implanter disclosed in patent document 1 has many operation steps, the design of the limiting seat is assembled above the head part, and the design of the inner surface of the transition section of the head is complicated, so that the reliability of the folding operation is affected.

The operation of the pre-loaded intraocular lens implanter of patent document 2 is as follows: firstly, a viscoelastic agent is filled, then the limiting seat assembled above the front surface of the implant head part of the pre-assembled intraocular lens implant is taken down, the constraint of the forward movement of the lens part is cancelled, and the injector injection part is pushed to complete the lens implantation injection action. The pre-assembled intraocular lens implanter of patent document 2 is configured such that a stopper seat is provided above the head part, and a stopper pin feature of the stopper seat passes through a fitting hole of the upper wall of the head and is positioned just in front of the anterior apex of the edge of the lens optic part, thereby functioning to restrict forward movement of the lens before implantation. The transition part of the implantation head inner cavity channel of the patent document 2 is positioned in front of the crystal bearing area of the main body part, the transition part of the implantation head of the patent document 2 enables the gap between the lower surface of the transition part and the lower surface of the crystal optical part to be smaller than the thickness of the front support loop through the section design of the inner cavity channel, so that when the front support loop is contacted with the left wall of the transition part of the implantation head to perform the turnover action in the implantation and injection motion process of the crystal, because the gap between the lower surface of the transition part of the implantation head and the lower surface of the crystal optical part is smaller, the risk that the crystal is turned over below the lower surface of the optical part is avoided. As can be seen from the above description, the pre-loaded intraocular lens implant of patent document 2 has insufficient fitting properties and risks that the anterior haptics are folded back but not folded over to the lens optic upper surface because the lens optic lower surfaces of different powers are not uniform.

In addition, patent document 3 also discloses a preloaded intraocular lens implanter product. However, the product does not fully consider the influence of viscoelastic agent flow on the state change of the front support loop when viscoelastic agent is poured, and has the problems that the folding action of the front support loop is unstable in the process of pushing and the reliability needs to be improved.

Documents of the prior art

Patent document 1: US9572710B1

Patent document 2: US7156854B2

Patent document 3: CN104414774B

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a pre-assembly type intraocular lens implanting device for improving reliability of a folding operation of a front haptic of an intraocular lens.

In order to achieve the above object, the present invention provides a pre-assembled intraocular lens implanting device, which comprises an intraocular lens and an intraocular lens implanting device, wherein the intraocular lens is pre-assembled inside the intraocular lens implanting device, the intraocular lens implanting device has an optical portion and a front haptic arranged in front of the optical portion, and a front haptic guide member is arranged at a position between the optical portion and the front haptic, and the front haptic guide member is capable of guiding the front haptic to generate an upward displacement when the front haptic moves backward.

With the above configuration, since the anterior haptic guide members capable of guiding upward displacement of the anterior haptics when they are moved backward by, for example, a viscoelastic impact are provided between the optical portion and the anterior haptics, the reliability of the action of folding the anterior haptics onto the upper surface of the optical portion can be improved.

The utility model discloses preferably, prepackage type intraocular lens implantation device still includes spacing seat, be formed with the pinhole on the intraocular lens implantation device, this pinhole is located in the front and back direction the intraocular lens the optical part with between the preceding tip of preceding support loop, spacing seat has the spacer pin, the spacer pin via the pinhole inserts in the intraocular lens implantation device and be located the intraocular lens optical part with between the preceding tip of preceding support loop, in order to restrict the intraocular lens moves to the front, preceding support loop guide part does the spacer pin.

With the above structure, the front haptic guide part is formed by the stopper pin which restricts the intraocular lens from moving forward, so that the number of parts can be reduced, the structure can be simplified, and the manufacturing cost can be reduced.

In the present invention, preferably, a guide surface is formed on a front surface of the stopper pin facing the front haptic, and the guide surface is formed of an inclined surface extending obliquely upward and rearward.

With the above configuration, since the front surface of the stopper pin facing the front end portion of the front haptic has the guide surface formed by the slope surface extending obliquely upward and rearward, when the front haptic moves rearward due to, for example, an impact of the viscoelastic agent, the front haptic is lifted upward by the guide surface extending obliquely upward and the reliability of the action of folding the front haptic over the upper surface of the optical portion can be improved.

The utility model discloses preferably be formed with the infusion mouth that is used for to its inside perfusion viscoelastic agent on the intraocular lens implantation device, the infusion mouth is located in the front and back direction the place ahead of the preceding tip of preceding haptic.

When the viscoelastic agent poured from the perfusion opening impacts the front support loop of the intraocular lens backwards, the front support loop can be guided by the guide surface to generate upward displacement because the guide surface is formed on the limit pin positioned at the rear part of the front end part of the front support loop and is formed by the inclined surface extending towards the rear upper part, thereby improving the reliability of the action of the front support loop turning over the upper surface of the optical part.

The present invention is preferably configured such that the inclined surface constituting the guide surface may be a straight surface which is straight when viewed in the left-right direction, a curved surface which is convex or concave, or any combination of the foregoing. The front surface of the stopper pin may include a vertical surface at a lower side and the guide surface at an upper side.

The utility model discloses preferably, the orientation of spacer pin the intraocular lens the rear surface of optical part comprises the vertical face that is vertical form when looking from the left and right directions.

With the above configuration, the forward movement of the optical portion of the intraocular lens can be reliably blocked by the vertical surface.

The utility model discloses preferably, still including being used for the packing the inner packing piece of intraocular lens implantation device, spacing seat still has the bearing, spacer pin an organic whole be formed in the bearing, the bearing install in inner packing piece.

By adopting the structure, the limiting seat is arranged on the inner packaging piece, namely the limiting seat and the inner packaging piece are formed in a split mode, so that the limiting seat with a more complex structure due to the limiting pin can be easily manufactured.

The utility model discloses it is preferred, interior package is the plastic uptake piece, spacing seat is the injection molding. With such a structure, the limiting seat is formed in a different injection molding mode from the inner packaging piece, and the limiting seat can be easily manufactured. In the present invention, it is preferable that the width of the stopper pin in the front-rear direction is set to be the same as the distance between the front end portions of the anterior haptics and the anterior edge of the optical portion when viewed in the left-right direction.

Preferably, the front haptic and the rear haptic extend forward and backward from the optical portion and have an arm shape having a base end and a free end.

The utility model discloses preferred, device is implanted to prepackage type intraocular lens implantation device the intraocular lens implantation device includes: an implanter main body having an intraocular lens bearing portion, the intraocular lens being disposed on the intraocular lens bearing portion; an implantation head for implanting the intraocular lens in a human eye, the implantation head deforming the intraocular lens as the intraocular lens passes through an inner cavity thereof, the pin hole being formed in a lower portion of the implantation head.

The utility model discloses preferably, in the up-down direction, the guide face at least formed at the height of the front surface of spacer pin is in the part above the lower bottom surface of intraocular lens bearing part. In this way, the guiding function of the leading haptic can be reliably ensured.

Drawings

FIG. 1 is a perspective view schematically illustrating the overall construction of an intraocular lens implanter according to an embodiment of the present invention;

FIG. 2 is an exploded view schematically illustrating the intraocular lens implanter;

FIG. 3 is a perspective view of a pre-assembled intraocular lens implanter implant head as viewed from the direction of the lower through-hole;

FIG. 4 is an enlarged partial cross-sectional view schematically illustrating the assembled state of the head implant head and the spacing block of the pre-assembled intraocular lens implanter;

FIG. 5 is an enlarged partial view schematically illustrating the assembled spacing block and inner packing member;

FIG. 6 is an enlarged partial cross-sectional view schematically illustrating the assembled state of the head implant head and the stop block of the pre-assembled intraocular lens implanter of the present invention;

FIG. 7 is a top view of an intraocular lens.

Description of the reference numerals

1. An intraocular lens implanter; 2. implanting a head; 2a, a nozzle part of the implant head; 2b, a transition part of the implant head; 201. a pin hole; 3. an implanter body; 3a, external threads; 4. a spiral tube; 5. an intraocular lens; 6. an optic portion of the intraocular lens; 7a, an anterior haptic of the intraocular lens; 7b, a back support loop of the artificial lens; 8. tabletting; 9. pushing the needle; 10. a push rod; 11. an artificial lens bearing part at the front end of the implanter main body; 12. a rear section of the implanter body; 30. an inner package; 40. a limiting seat; 41. a support seat of the limiting seat; 42. a limiting pin of the limiting seat.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The following describes embodiments of the present invention with reference to the drawings.

Fig. 1 is a perspective view schematically showing the overall structure of an intraocular lens implanter according to the present embodiment; fig. 2 is an exploded perspective view schematically showing the structure of the intraocular lens implanter of the present embodiment. FIG. 3 is a perspective view of the orientation of a fitting aperture below the head member of a pre-assembled intraocular lens implant; FIG. 4 is an enlarged cross-sectional view schematically illustrating the assembled state of the head implant head and the spacing block of the pre-assembled intraocular lens implanter; FIG. 5 is a partial perspective view schematically illustrating the spacing block assembled with the inner package; FIG. 6 is an enlarged partial cross-sectional view schematically illustrating the assembled state of the head implant head and the stop block of the pre-assembled intraocular lens implanter of the present invention; FIG. 7 is a top view of an intraocular lens.

In the present embodiment, in order to clarify the relative positional relationship of each part of the intraocular lens implanter, the direction of operation, and the like, the front, rear, left, right, up, and down directions are defined, wherein the front-rear direction coincides with the axial direction of the elongated intraocular lens implanter, the left-right direction coincides with the width direction of the intraocular lens implanter, and the up-down direction coincides with the height direction of the intraocular lens implanter. These directions are also indicated in fig. 1. Again, these defined directions are also applicable in other embodiments.

In addition, the term "optical portion" used in the present application refers to a portion of an intraocular lens having optical characteristics so as to be able to perform a primary function of adjusting the diopter of the intraocular lens.

The term "haptics" as used herein refers to the portions associated with the optic of an intraocular lens that serve both to support the optic and to transfer the contractile force produced by contraction and flexure of the ciliary muscles to the optic.

The term "intraocular lens implant axis" as used in this application refers to the longitudinal centerline of the elongated intraocular lens implant.

The term "lower optic surface" (corresponding to the 1 st optic surface in the present invention) as used in this application is relative to the upper optic surface of the intraocular lens optic (corresponding to the 2 nd optic surface in the present invention), and the lower optic surface of the optic portion of the intraocular lens pre-installed in the implanter refers to that optic surface which contacts the upper surface of the bearing portion of the intraocular lens at the front end of the implanter main body.

In the following description, unless otherwise specified, the installation positions of the respective members, the positional relationship between the members, and the like refer to the installation positions, the positional relationship, and the like of injector 1 in an initial state in which the bolus operation is not performed.

< Implantation apparatus >

In the present embodiment, intraocular lens implanter 1 (may be simply referred to as implanter 1) is a pre-installed intraocular lens implanter in which an intraocular lens is installed in advance. As shown in fig. 1 and 2, an intraocular lens implanter 1 has an implanter main body 3, an implantation head 2 mounted at the front end of the implanter main body 3, and a spiral tube 4 mounted at the rear end of the implanter main body 3. An intraocular lens bearing portion 11 is provided at the front end of the implanter main body 1, and an intraocular lens 5 is placed in advance on the intraocular lens bearing portion 11. In addition, a push pin 9 is installed inside the implanter body 1, the push pin 9 is positioned behind the intraocular lens 5, and a push rod 10 is installed inside the spiral tube 4. The front end of the push rod 10 is connected with the rear end of the push needle 9.

As shown in FIG. 2, the implanter main body 3 is substantially cylindrical, and has a lens holder 11 at its front end projecting forward from the bottom, and an intraocular lens 5 is placed on the lens holder 11, and the intraocular lens 5 is placed on the lower bottom surface 11a of the lens holder 11. The lens holder 11 not only serves to hold the intraocular lens, but also serves to restrict the movement of the intraocular lens in the vertical direction and the lateral direction (a number of specific implementation configurations have been disclosed in the prior art, for example, refer to patent documents described in the background, and the detailed description thereof will not be repeated here).

In the present embodiment, the intraocular lens 5 is made of a hydrophobic soft material. As shown in fig. 7, this intraocular lens 5 has a substantially disk-shaped optical portion 6, and a pair of anterior and posterior haptics 7a and 7b, which are anterior and posterior haptics, provided on both anterior and posterior sides of the optical portion 6. The optical portion 6 has a lower surface (1 st optical surface) and an upper surface (2 nd optical surface) facing away from each other. The anterior haptics 7a are cantilevered forward from the right side of the optical portion 6, extend forward while inclining to the left side, are substantially L-shaped, have a base end portion 7a1 connected to the optical portion 6 and a leading end portion 7a2 as an extended end and a free end, and form a space between the leading end portion 7a2 and the front edge of the optical portion 6. The posterior haptics 7b are, similarly to the anterior haptics 7a, arm-like projecting rearward from the left side portion of the optical portion 6 and extend obliquely rightward while extending rearward, and are substantially L-shaped having a base end portion 7b1 connected to the optical portion 6 and a posterior end portion 7b2 as an extended end and a free end, with a space formed between the posterior end portion 7b2 and the posterior edge of the optical portion 6.

When the intraocular lens 5 is caused to make a predetermined curl or fold, the anterior and posterior haptics 7a and 7b are folded over the upper surface of the optical portion 6, respectively, and the left and right edges of the optical portion 6 are folded up to wrap the anterior and posterior haptics 7a and 7 b.

An external thread 3a is provided on the outer peripheral surface of the rear section 12 of the injector body 3, and the external thread 3a is engaged with an internal thread provided on the spiral tube 4 so that the spiral tube 4 can move in the axial direction (front-rear direction) of the injector with respect to the injector body 3 when the spiral tube 4 is rotated.

As shown in fig. 1, the coil 4 is coaxially mounted at the rear end of the implanter body 3, and is a member that can be rotated by the operator as described above. A push rod 10 is installed inside, the rear end 10b of the push rod 10 is connected to the spiral tube 4 so as to be rotatable but immovable in the front-rear direction, and the front end 10a of the push rod 10 is connected to the rear end of the push pin 9.

The pusher 9 is installed inside the implanter main body 3 so as to be relatively movable in the front-rear direction, and as described above, the rear end thereof is connected to the front end 10a of the pusher 10, and when the pusher 10 moves forward, the pusher 9 is pushed by the pusher 10 to move forward.

As shown in fig. 2, the implanter 1 further includes a pressing plate 8, and the pressing plate 8 is provided on the implanter body 3 so as to be movable in the front-rear direction with respect to the implanter body 3. The pressing piece 8 plays a role of pressing the intraocular lens 5 and the push pin 9 downward when performing the pushing action.

As shown in fig. 2, the implantation head 2 has a nozzle portion 2a for releasing the intraocular lens 5 into the human eye and a transition portion 2b located behind the nozzle portion 2a, and the inner cavity of the transition portion 2b is shaped and sized so as to be capable of folding or curling the intraocular lens 5 and reach the nozzle portion 2a in this state. Further, the shape and size setting of the transition portion 2b capable of causing the intraocular lens 5 (optical portion 6) to undergo curling deformation from the bottom to the top are disclosed in many cases in the prior art (for example, patent documents 1 to 3 described above), and will not be further described in the present specification.

When using implanter 1 to implant intraocular lens 5 in the human eye, the operator carries out the rotation operation to spiral tube 4, makes spiral tube 4 move forward along implanter 1's axis direction (fore-and-aft direction) from this, drives push rod 10 and removes, and then drives push pin 9 by push rod 10 and also moves forward, and the push pin 9 of forward movement promotes the intraocular lens 5 of presetting on intraocular lens supporting part 11, pushes it into implantation head 2 in, and push through implantation head 2 and inject in the human eye.

As shown in fig. 3, the implantation head 2, specifically, the lower portion of the transition portion 2b is provided with a pin hole 201, and the position of the pin hole 201 in the front-rear direction is set so as to be located approximately between the front end portion of the front haptic 7a of the intraocular lens 5 on the lens support portion 11 and the front edge of the optical portion 6. The pin hole 201 is inserted with a stopper pin 42 of a stopper holder 40 described later.

As shown in fig. 4, the implantation head 2 is provided with an infusion port 202, specifically, at the upper portion of the transition portion 2b, and the infusion port 202 is formed of a through hole penetrating the inside and outside of the implantation head 2, and before the bolus injection operation, the viscoelastic agent is infused into the implantation head 2 through the infusion port 202. In the present embodiment, the position of the infusion port 202 in the front-rear direction is set to be located forward (above and forward) of the front end portion 7a2 of the front haptic 7a of the intraocular lens 5.

< inner package >

The implanter 1 is typically packaged in an inner package 30 during shipping, handling, and until surgery (intraocular lens injection). The portion of the inner package 30 that mates with the implantation head 2 of the implanter 1 is shown in fig. 5. However, since a more specific structure thereof is disclosed in detail in CN104127264A, for example, it will not be described in further detail herein.

< position limiting base >

As shown in fig. 5, a stopper housing 40 is mounted on the inner package 30. The utility model discloses in prepackage type intraocular lens implantation device include this inner packing piece 30, spacing seat 40, above-mentioned intraocular lens implantation device 1 and prepackage type intraocular lens 5 in intraocular lens implantation device 1. In the present embodiment, the stopper seat 40 and the inner package 30 are manufactured by different methods, that is, the stopper seat 40 is formed by an injection molding method, and is an injection molded part, and the inner package 30 is formed by a blister molding method, and is a blister molded part. In this way, the stopper seat 40 having a complicated shape can be easily molded, as compared with the case where the stopper seat 40 is integrally formed on the inner package member 30.

Referring to fig. 4 and 6, the stopper holder 40 includes a support base 41 and a stopper pin 42, the support base 41 is a substantially square base portion and is engaged with the inner package member 30, the stopper pin 42 is provided upright on an upper surface of the support base 41, and the support base 41 and the stopper pin 42 are integrally formed.

Referring to fig. 4 and 6, in a state where the injector 1 is mounted on the inner package 30, the stopper pin 42 of the stopper holder 40 is inserted into the inside of the implantation head 2 through the pin hole 201 of the implantation head 2 in a space between the front end portions 7a2 (free end portions) of the front haptics 7a of the intraocular lens 5 and the front edge of the optical portion 6. This allows the stopper pin 42 to block the optical portion 6 and thus the intraocular lens 5 from moving forward, thereby stopping the movement.

As shown in fig. 4 to 6, the rear surface 42a of the stopper pin 42 facing the optical portion 6 of the intraocular lens 5 is constituted by a vertical surface which is flat when viewed in the left-right direction, and which serves as a stop surface which blocks forward movement of the optical portion 6; further, the front surface of the stopper pin 42 is constituted by a vertical surface 42c on the lower side and a guide surface 42b on the upper side, the vertical surface 42c is straight as viewed in the left-right direction, and the guide surface 42b is formed at least in a portion where the height of the front surface of the stopper pin 42 is above the lower bottom surface 11a of the intraocular lens bearing part 11, and in the present embodiment, is constituted by a straight inclined surface extending obliquely upward and rearward.

Further, the width of the stopper pin 42 (specifically, the maximum width portion of the stopper pin 42 in the anteroposterior direction) in the anteroposterior direction as viewed in the lateral direction is set to be substantially the same as the distance between the anterior end portions 7a2 (free end portions) of the anterior haptics 7a of the optical portion 6 and the anterior edge of the optical portion 6, so that the anterior haptics 7a of the intraocular lens can be better restrained in an ideal state.

The guide surface 42b is formed by a straight slope in the present embodiment. Specifically, as shown in fig. 4 to 6, the inclined surface to constitute the guide surface 42b is formed from the front to the rear over a partial length in the front-rear direction of the stopper pin 42. However, without being limited thereto, the inclined surface to constitute the guide surface 42b may also be formed from the front to the rear over the entire length in the front-rear direction of the stopper pin 42.

< effects of the present embodiment >

The effects of the present embodiment will be described below in conjunction with the method of assembling and using a pre-loaded intraocular lens implantation device.

With the pre-assembly intraocular lens implanting device of the present embodiment, during assembly, the limiting seat 40 is first assembled on the inner packaging member 30, then the pre-assembly intraocular lens implanting device 1 is assembled on the inner packaging member 30, and the limiting pin 42 of the limiting seat 40 is just inserted into the pin hole 201 below the implanting head 2 of the implanted device 1 after assembly, so that the limiting pin 42 of the limiting seat 40 is positioned in the space between the front edge of the optical portion 6 of the intraocular lens 5 in the inner housing of the implanting device 1 and the front end portion 7a2 of the front supporting loop 7a, and thus the rear surface 42a of the limiting pin 42 plays a role in limiting the movement of the intraocular lens 5 toward the nozzle 2a of the implanting head 2.

When the intraocular lens is implanted, the viscoelastic agent is first injected through the injection port 202 of the injector head 2, and then the pre-assembled intraocular lens injector 1 is vertically removed from the inner package 30, and the injector unit 9 of the injector 1 is operated to inject the intraocular lens. Since the infusion port 202 of the viscoelastic agent is located in front of the anterior haptic 7a of the intraocular lens 5, the flow of the infused viscoelastic agent will likely push the anterior haptic 7a back into folded contact with the anterior surface of the stopper pin 42, and since the height of the anterior surface of the stopper pin 42 at the lower bottom surface 11a of the intraocular lens holder 11 is a slope (guide surface 42b) extending obliquely upward and rearward, the anterior haptic 7a of the intraocular lens 5 will slide upward along this slope, making the anterior haptic 7a higher than the upper surface of the optical portion 6 of the intraocular lens 5. In this state, when the injector 1 is removed from the inner package 30, since the infused viscoelastic agent fills the lumen of the implantation head 2, the anterior haptic 7a will maintain its state under the resistance of the viscoelastic agent, so that the reliability of the action of the subsequent anterior haptic 7a being folded back to the upper surface of the optical portion 6 under the combined action of the push-injection part 9 pushing the optical portion 6 forward and the side surface of the transition part 2b of the implantation head 2 is ensured.

In summary, according to the present embodiment, the position-limiting base 40 simultaneously performs the functions of limiting the position of the intraocular lens 5 and improving the reliability of the folding action of the anterior haptic 7a, the structural design is simple, no additional operation is required, the viscosity range of the viscoelastic agent applicable to the entire apparatus is wide, if the viscosity of the viscoelastic agent is low, the anterior haptic 7a is not affected by the perfusion of the viscoelastic agent, the action of pushing and folding the anterior haptic 7a is realized according to the normal theoretical design state, if the viscosity of the viscoelastic agent is high, the anterior haptic 7a is affected by the perfusion of the viscoelastic agent, but the guide surface 42b on the front surface of the position-limiting pin 42 of the position-limiting base 40 can ensure that the anterior haptic 7a moves upward to be higher than the upper surface of the optical portion 6 of the intraocular lens 5, thereby improving the reliability of the folding action of the anterior haptic 7a of the intraocular lens 5.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

For example, in the above embodiment, the guide surface 42b is formed by a straight slope, but the present invention is not limited to this, and may be formed by a concave or convex curved surface, or any combination of a straight slope, a concave curved surface, and a convex curved surface (for example, a combination of a multi-step straight slope, a straight slope, and a concave curved surface), as long as it extends obliquely upward and rearward and can guide the front haptic 7a to displace upward.

In addition, in the above-described embodiment, the guide surface that guides the anterior haptics 7a to be raised backward is formed on the stopper pin 42, however, the present invention is not limited thereto, and a detachable anterior haptic guide member, on the front surface of which the guide surface constituted by a slant surface is formed, may be mounted independently of the stopper pin 42 in addition at a position between the anterior haptics 7a and the optical portion 6 on the implanter 1. The specific structure of the anterior haptic guide member is not limited to the above embodiment, and may be any structure as long as it can move backward upon impact of viscoelastic, for example, with the anterior haptic, and can guide the anterior haptic to displace upward.

In the above embodiment, the stopper seat 40 (and the stopper pin 42) is mounted on the inner package 30 through the support base 41, however, the present invention is not limited thereto, and may be configured as a stopper seat having no mounting relation with the inner package 30, and after the intraocular lens injector 1 is removed from the inner package 30, the stopper seat (and the stopper pin thereon) is removed from the intraocular lens injector 1 by another operation.

In the above embodiment, the position limiting seat 40 (and the position limiting pin 42) are disposed at the bottom of the intraocular lens implanter 1, and the position limiting pin 42 is inserted into the intraocular lens implanter 1 from the bottom to the top through the pin hole and is located between the front haptic 7a and the optical portion 6, however, the present invention is not limited thereto, and the position limiting seat 40 and the position limiting pin 42 may also be disposed at the top of the intraocular lens implanter 1, and the pin hole is also disposed at the top of the intraocular lens implanter 1, and then the position limiting pin 42 is inserted into the intraocular lens implanter 1 from the top to the bottom through the pin hole and is located between the front haptic 7a and the optical portion 6.

Claims (12)

1. A pre-assembled intraocular lens implanting device comprises an intraocular lens (5) and an intraocular lens implanter (1),

the intraocular lens (5) is pre-installed inside the intraocular lens implanter (1) and is provided with an optical part (6) and an anterior haptic (7a) arranged on the anterior side of the optical part (6),

it is characterized in that the preparation method is characterized in that,

an anterior haptic guide member capable of guiding the anterior haptic (7a) to be displaced upward when the anterior haptic (7a) is moved backward is disposed at a position between the optical portion (6) and the anterior haptic (7a) on the intraocular lens implanter (1).

2. The preloaded intraocular lens implant device of claim 1,

also comprises a limiting seat (40),

the intraocular lens implanter (1) is formed with a pinhole (201), the pinhole (201) being located between the optical portion (6) of the intraocular lens (5) and the anterior end portion (7a2) of the anterior haptic (7a) in the anterior-posterior direction,

the limiting seat (40) is provided with a limiting pin (42) which is inserted into the intraocular lens implanter (1) through the pin hole and is positioned between the optical part (6) of the intraocular lens (5) and the front end part (7a2) of the front supporting loop (7a) so as to limit the forward movement of the intraocular lens (5),

the anterior haptic guide component is the limit pin (42).

3. The preloaded intraocular lens implant device according to claim 2, characterized in that a guide surface (42b) is formed on the front surface of the stopper pin (42) facing the anterior haptic (7a), the guide surface (42b) being constituted by a slope surface extending obliquely upward and rearward.

4. The preloaded intraocular lens implant device of any of claims 1-3,

an infusion port (202) for infusing a viscoelastic agent into the interior thereof is formed on the intraocular lens implanter (1), the infusion port (202) being located forward of a leading end portion (7a2) of the anterior haptic (7a) in the anterior-posterior direction.

5. The preloaded intraocular lens implant device of claim 3,

the guide surface is a straight surface which is straight when viewed in the left-right direction, or a curved surface which is convex or concave, or any combination of the foregoing.

6. The preloaded intraocular lens implantation device according to claim 2 or 3, characterized in that the posterior surface (42a) of the stop pin (42) facing the optical portion (6) of the intraocular lens (5) is constituted by a vertical surface that is vertical when viewed from the left-right direction.

7. The preloaded intraocular lens implant device of claim 2 or 3,

further comprising an inner packaging (30) for packaging the intraocular lens implant,

the limiting seat (40) is further provided with a supporting seat (41), the limiting pin (42) is integrally formed on the supporting seat (41), and the supporting seat (41) is installed on the inner packaging member (30).

8. The preloaded intraocular lens implant device of claim 7, wherein said inner packaging component (30) is a blister and said retention base (40) is an injection molded component.

9. The preloaded intraocular lens implantation device according to claim 2 or 3, wherein the width of the stopper pin (42) in the anterior-posterior direction as viewed in the left-right direction is set to be the same as the distance between the anterior end portions (7a2) of the anterior haptics (7a) and the anterior edge of the optic (6).

10. The preloaded intraocular lens implantation device of claim 2, wherein said intraocular lens implanter (1) comprises:

an implanter main body (3) having an intraocular lens bearing portion (11), the intraocular lens (5) being disposed on the intraocular lens bearing portion (11);

an implantation head (2) for implanting the intraocular lens (5) in a human eye, the implantation head deforming the intraocular lens (5) as the intraocular lens (5) passes through its lumen, the pin hole (201) being formed in a lower portion of the implantation head (2).

11. The preloaded intraocular lens implantation device of claim 3, wherein said intraocular lens implanter (1) comprises:

an implanter main body (3) having an intraocular lens bearing portion (11), the intraocular lens (5) being disposed on the intraocular lens bearing portion (11);

an implantation head (2) for implanting the intraocular lens (5) in a human eye, the implantation head deforming the intraocular lens (5) as the intraocular lens (5) passes through its lumen, the pin hole (201) being formed in a lower portion of the implantation head (2).

12. The device according to claim 11, wherein the guide surface is formed at least in a portion where the height of the front surface of the stopper pin (42) is higher than the lower bottom surface (11a) of the intraocular lens holder (11) in the up-down direction.

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