JP2016190023A - Intraocular lens insertion instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intraocular lens insertion instrument capable of suitably deforming and injecting an intraocular lens.SOLUTION: The intraocular lens insertion instrument includes: a passage 20b in which a passage area becomes gradually smaller as approaching to the tip side; internal surfaces 24a and 24b formed at both the sides in a direction orthogonal to the axial direction of the passage and parallel to the radial direction of an optical part 110 of an intraocular lens 100 disposed inside the passage; an extrusion member for extruding the intraocular lens; and a lens control mechanism for controlling the orientation of the intraocular lens in the circumferential direction of the optical part, by advancing a contact part of the extrusion member with the intraocular lens towards the internal surface after the intraocular lens is extruded towards the tip side by the extrusion member in a state in which a first support part is positioned closer to the tip side than the optical part in the passage so that the first support part is bent with the tip part positioned at the inner side than the outer peripheral part of the optical part.SELECTED DRAWING: Figure 15

Description

  The present disclosure relates to an intraocular lens insertion device for inserting an intraocular lens into the eye.

  Conventionally, as one of the surgical methods for cataracts, a technique of inserting a foldable soft intraocular lens into the eye instead of the crystalline lens is generally used. In addition, an intraocular lens may be inserted in front of the crystalline lens in order to correct the refractive power of the eye. An intraocular lens insertion device called an injector may be used to insert an intraocular lens into the eye.

  As such an injector, in an insertion part where a notch is formed at the tip, the intraocular lens is folded into a small size by pushing out the intraocular lens in a hollow portion where the inner diameter gradually decreases toward the tip, and the tip is externally There are known injectors that inject into (For example, refer to Patent Document 1).

JP 2010-82288 A

  In the injector as described above, when the intraocular lens is folded while being accommodated in the optical part by folding the support part on the distal end side in the hollow part, the support part on the distal end side is in the folded optical part. There was a case in which an intraocular lens was ejected without being accommodated.

  Therefore, the present disclosure has been made in order to solve the above-described problems, and an object thereof is to provide an intraocular lens insertion device capable of suitably deforming and ejecting an intraocular lens.

  An intraocular lens insertion device according to an exemplary embodiment of the present disclosure inserts an intraocular lens including a disk-shaped optical unit and a first support unit extending outward from an outer peripheral portion of the optical unit into the eye. An intraocular lens insertion device that has a passage area that gradually decreases toward the distal end side, and a direction orthogonal to the axial direction of the passage, the intraocular lens disposed in the passage. Inner wall surfaces formed on both sides in a direction parallel to the radial direction of the optical part, an extrusion member that pushes out the intraocular lens, and the first support part in the passage closer to the distal end than the optical part The intraocular lens is pushed out to the distal end side by the pusher member in a positioned state, the first support portion is bent, and the distal end portion of the first support portion is disposed inside the outer peripheral portion of the optical portion. After that, the extruded member A lens control mechanism for controlling the orientation of the intraocular lens in the circumferential direction of the optical unit by advancing the contact portion with the intraocular lens toward the inner wall surface. .

  An intraocular lens insertion device according to an exemplary embodiment of the present disclosure inserts an intraocular lens including a disk-shaped optical unit and a first support unit extending outward from an outer peripheral portion of the optical unit into the eye. An intraocular lens insertion device that has a passage area that gradually decreases toward the distal end side, and a direction orthogonal to the axial direction of the passage, the intraocular lens disposed in the passage. A first inner wall surface and a second inner wall surface formed on both sides in a direction parallel to a radial direction of the optical unit; and an extrusion member that pushes out the intraocular lens. The intraocular lens includes the optical unit While being in contact with the first inner wall surface and the second inner wall surface, it is pushed out to the tip end side by the pushing member, and the first support portion is positioned closer to the tip end side than the optical portion in the passage. In this state, the intraocular lens is moved by the push member. After the first support portion is bent and the first support portion is bent and the tip portion of the first support portion is disposed inside the outer peripheral portion of the optical portion, the first inner wall surface and the optical By changing the magnitude of the first frictional force generated between the optical part and the magnitude of the second frictional force generated between the second inner wall surface and the optical part, the optical part of the intraocular lens Controlling the direction of the circumferential direction.

  An intraocular lens insertion device according to an exemplary embodiment of the present disclosure inserts an intraocular lens including a disk-shaped optical unit and a first support unit extending outward from an outer peripheral portion of the optical unit into the eye. An intraocular lens insertion device, wherein a front passage gradually decreases in area toward the distal end side, a rear passage formed behind the front passage in the pushing direction of the intraocular lens, and the rear A first inner wall surface and a second inner wall formed on both sides of the direction parallel to the radial direction of the optical part when the intraocular lens is disposed in the rear passage, A wall surface and an extruding member that pushes out the intraocular lens, and when the intraocular lens is inserted into the eye, the first support portion is more distal than the optical portion in the rear passage. In front of the intraocular lens After extruding to the front passage side by the pushing member, the first support part is bent inside the optical part by pushing the intraocular lens to the tip side by the pushing member in the front passage, The first inner wall surface is formed at a position on the side where the root portion of the first support portion is disposed when the intraocular lens is disposed in the rear passage with respect to the central axis of the rear passage. And a first contact portion is formed at a position closer to the central axis of the rear passage than the first inner wall surface, and the first contact portion contacts the outer peripheral portion of the optical portion when the intraocular lens is pushed out. It is formed in the position to perform.

  According to the intraocular lens insertion device of the present disclosure, the intraocular lens can be suitably deformed and ejected.

It is a top view of an intraocular lens insertion instrument. It is a side view of an intraocular lens insertion instrument. It is AA sectional drawing of FIG. 2 in 1st Example of 1st Embodiment. It is BB sectional drawing of FIG. 2 in 1st Example of 1st Embodiment. It is CC sectional drawing of FIG. It is a top view of an intraocular lens. It is a right view of an intraocular lens. It is sectional drawing which shows a state when the front-end | tip part of a front support part enters inside the outer peripheral part of an optical part. In 1st Example of 1st Embodiment, it is sectional drawing which shows a state when rotating an intraocular lens about the circumferential direction of an optical part. It is DD sectional drawing of FIG. It is sectional drawing which shows the state by which the intraocular lens was folded small. It is sectional drawing which shows the modification in the 1st Example of 1st Embodiment. It is sectional drawing which shows a comparative example. It is AA sectional drawing of FIG. 2 in 2nd Example of 1st Embodiment. In 2nd Example of 1st Embodiment, it is sectional drawing which shows a state when rotating an intraocular lens about the circumferential direction of an optical part. It is sectional drawing which shows the modification in 2nd Example of 1st Embodiment. It is AA sectional drawing of FIG. 2 in 2nd Embodiment. It is BB sectional drawing of FIG. 2 in 2nd Embodiment. It is EE sectional drawing of FIG. It is sectional drawing which shows a state when the optical part of an intraocular lens contacts the inner surface of a 1st protrusion. It is FF sectional drawing of FIG. It is sectional drawing which shows a state when the base part of the back support part of an intraocular lens contacts the inner surface of a 2nd protrusion. It is GG sectional drawing of FIG. It is sectional drawing which shows a state when it begins to bend so that the optical part of an intraocular lens may be folded in a valley. It is sectional drawing which shows a state when the intraocular lens is further pushed out from the state of FIG. It is sectional drawing which shows the state by which the intraocular lens was folded small.

  Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[First Embodiment]
<First embodiment>
First, a first example of the first embodiment will be described.

  First, the structure of the injector 1 which is an intraocular lens insertion instrument will be described. As shown in FIGS. 1 and 2, the injector 1 of the present embodiment includes a cylindrical body (hereinafter referred to as “main body”) 10, a plunger 12 (extrusion member), and the like. The main body 10 includes an insertion portion 20 and a placement portion 22. Such an injector 1 is formed by, for example, injection molding using a resin material (for example, polypropylene) or the like. Moreover, the injector 1 may be formed by cutting out resin. The injector 1 may be a cartridge type in which the insertion portion 20 is replaceable.

  The insertion part 20 is formed in a hollow cylindrical shape. As illustrated in FIGS. 3 and 4, the insertion portion 20 includes a passage 20 b (front passage). In the passage 20b, the space through which the intraocular lens 100 passes becomes narrower toward the distal end 20a of the insertion portion 20 in order to fold the intraocular lens 100. That is, the area of the passage gradually decreases toward the tip 20a. The passage area is a cross-sectional area of the passage 20b in a cross section orthogonal to the pushing direction of the intraocular lens 100 (the left direction in FIGS. 3 and 4).

  Further, a notch (bevel) for feeding the intraocular lens 100 to the outside is formed at the distal end 20a of the insertion portion 20. Then, the intraocular lens 100 that has passed through the passage 20b is folded small along the inner wall surface 20c (front inner wall surface), sent out from the notch of the tip 20a, and inserted into the eye. The inner wall surface 20c (the first inner wall surface 24a (first front inner wall surface) and the second inner wall surface 24b (second front inner wall surface)) is a direction orthogonal to the direction of the central axis Lt of the passage 20b. It is formed on both sides in a direction parallel to the radial direction of the optical unit 110 when the intraocular lens 100 is disposed in 20b (see FIG. 8).

  In the present embodiment, the first inner wall surface 24a and the second inner wall surface 24b are formed in a symmetrical shape (inclination) with respect to the central axis Lt of the passage 20b.

  As shown in FIG. 5, the ceiling surface 20d (first axial direction surface) and the bottom surface 20e (second axial direction surface) are directions orthogonal to the direction of the central axis Lt of the passage 20b and are intraocularly within the passage 20b. It is formed on both sides in a direction parallel to the central axis (optical axis) L direction of the optical unit 110 when the lens 100 is disposed. The bottom surface 20e is curved in a concave shape outside the passage 20b (the lower side in FIG. 5). That is, the bottom surface 20 e is a surface facing a first protrusion 32 (projecting portion 36) described later, and is recessed in the protruding direction of the first protrusion 32.

  Here, as shown in FIGS. 3 to 5 and the like, assuming an X axis, a Y axis, and a Z axis orthogonal to each other, a direction parallel to the pushing direction of the intraocular lens 100 (the central axis Lt of the passage 20b and the passage 22a). Direction, extrusion axis Lp direction) is defined as the X-axis direction. Then, the passage 20b includes two inner wall surfaces 20c (first inner wall surface 24a and second inner wall surface 24b) formed on both sides in the Y-axis direction, and a ceiling surface 20d and a bottom surface 20e formed on both sides in the Z-axis direction. (See FIG. 5) and the like.

  In the present embodiment, the central axis Lt of the passage 20b coincides with the extrusion axis Lp.

  The mounting portion 22 is formed at a position behind the insertion portion 20 in the pushing direction of the plunger 12 (right direction in FIGS. 1 to 4). The intraocular lens 100 before being pushed out by the plunger 12 is arranged in a passage 22a (rear passage) formed in the placement portion 22 (see FIG. 4).

  As shown in FIGS. 3 and 4, the mounting portion 22 includes a passage 22 a, a ceiling surface 22 b, a bottom surface 22 c, a guide portion 30, a first protrusion 32 (first guide protrusion), and a second protrusion 34. (Second guide protrusion) and the like. The guide portion 30 is a portion that is formed on the ceiling surface 22 b and guides the pushing direction of the plunger 12.

  The first protrusion 32 and the second protrusion 34 are formed along the pushing direction of the plunger 12. The first protrusion 32 constitutes one wall surface (the lower side in FIG. 3) of the guide portion 30 and protrudes from the ceiling surface 20d and the ceiling surface 22b to the bottom surface 20e and the bottom surface 22c side (the front side in FIG. 3). ing. The second protrusion 34 constitutes the other wall surface (upper side in FIG. 3) of the guide portion 30 and protrudes from the ceiling surface 22b to the bottom surface 22c side (front side in FIG. 3).

  In the present embodiment, the first protrusion 32 includes a protruding portion 36 (lens control mechanism). The protruding portion 36 is formed at a position on the distal end 20 a side of the insertion portion 20 in the first protrusion 32. As shown in FIG. 3, the protruding portion 36 is formed so as to protrude inside the guide portion 30 from the guide surface 32 b facing the guide portion 30 in the first protrusion 32. The protruding portion 36 is formed in an inclined shape (tapered shape) so that the guide surface 36a facing the guide portion 30 gradually protrudes toward the inside of the guide portion 30 as it goes to the distal end 20a side of the insertion portion 20. . That is, the protruding amount of the protruding portion 36 toward the inside of the guide portion 30 gradually increases as it goes toward the distal end 20 a side of the insertion portion 20. The guide surface 36a serves as a surface for guiding the plunger 12, as will be described later. Further, the protruding portion 36 may be formed separately from the first protrusion 32.

  As shown in FIG. 5, the protruding portion 36 protrudes from the ceiling surface 20 d side toward the bottom surface 20 e side in the passage 20 b of the insertion portion 20. The protruding portion 36 also protrudes from the ceiling surface 22b side toward the bottom surface 22c side in the passage 22a of the placement portion 22.

  In the present embodiment, a part of the protruding portion 36 is a direction orthogonal to the direction of the central axis Lt of the passage 20b, and the radial direction of the optical portion 110 when the intraocular lens 100 is disposed in the passage 20b. Is formed also at the position of the central portion Ce of the passage 20b in the direction parallel to (Y-axis direction). Specifically, the front end portion 36b of the protruding portion 36 (the end portion on the distal end 20a side of the insertion portion 20) is, in the Y-axis direction, from the position closer to the first inner wall surface 24a than the central portion Ce of the passage 20b. Is formed over the second inner wall surface 24b side of the center portion Ce of the passage 20b (see FIG. 3).

  The protruding portion 36 may be formed only in the Y axis direction at a position closer to the first inner wall surface 24a than the central portion Ce of the passage 20b.

  In the present embodiment, as shown in FIG. 3, the front end portion 34 a on the distal end 20 a side of the insertion portion 20 in the second protrusion 34 is more than the front end portion 32 a on the distal end 20 a side of the insertion portion 20 in the first protrusion 32. It is formed at a rear position in the pushing direction of the intraocular lens 100.

  Note that names such as “ceiling surface 20d”, “bottom surface 20e”, “ceiling surface 22b”, and “bottom surface 22c” are for convenience, and do not strictly define the vertical direction of the injector 1. For example, the bottom surface 20 e is not always located below the intraocular lens 100. That is, the vertical direction of the injector 1 can be changed during transportation, when the injector 1 is filled with a viscoelastic substance, and when the intraocular lens 100 is inserted into the eye.

  Next, the intraocular lens 100 used in the present embodiment will be described. As shown in FIGS. 6 and 7, the intraocular lens 100 used in the present embodiment includes an optical unit 110, a front support unit 112 </ b> A (first support unit) and a rear support unit 112 </ b> B (a pair of support units). The second support part) is a one-piece type intraocular lens integrally formed of a flexible material.

  The optical unit 110 is formed in a disk shape. Further, the front support part 112A and the rear support part 112B extend outward from the outer peripheral part 110a of the optical part 110, and are formed at point-symmetric positions with respect to the center of the optical part 110. In the front support portion 112A, the base portion 116A is connected to the outer peripheral portion 110a of the optical unit 110 via the connection portion 114A, and the distal end portion 118A is open. (That is, the tip portion 118A is a free end). Further, in the rear support portion 112B, the root portion 116B is connected to the outer peripheral portion 110a of the optical unit 110 via the connection portion 114B, and the tip end portion 118B is open.

  Next, as an operation of the injector 1, a method for inserting the intraocular lens 100 using the injector 1 into the eye will be described.

  First, as shown in FIG. 4, the operator who operates the injector 1 places the intraocular lens 100 in the passage 22 a of the placement portion 22, and the front support portion 112 </ b> A is closer to the insertion portion 20 than the optical portion 110. It arrange | positions so that it may be located in the front-end | tip 20a side. Then, the surgeon pushes the rear support portion 112 </ b> B of the intraocular lens 100 with the plunger 12. As a result, the base portion 116B of the rear support portion 112B is curved, and the rear support portion 112B is bent inside the outer peripheral portion 110a of the optical portion 110 and placed on the optical portion 110.

  Thereafter, when the surgeon further pushes the outer peripheral portion 110a of the optical unit 110 of the intraocular lens 100 with the plunger 12, the intraocular lens 100 is pushed out toward the distal end 20a side of the insertion unit 20. At this time, the tip 12a of the plunger 12 (contact portion with the intraocular lens 100) travels on the extrusion axis Lp. As shown in FIG. 8, the outer peripheral portion 110a of the optical unit 110 of the intraocular lens 100 contacts the inner wall surface 20c in the passage 20b, and the optical unit 110 is on the bottom surface 20e side (the back side in FIG. 8). It is bent so as to be folded toward the valley.

  At the same time, the front support portion 112A of the intraocular lens 100 contacts the inner wall surface 20c, and the root portion 116A is gradually bent by the stress applied from the inner wall surface 20c, and is bent toward the optical unit 110 side. It is done. Then, as shown in FIG. 8, the front support portion 112A is disposed on the inner side of the outer peripheral portion 110a of the optical portion 110 so that the front end portion 118A of the front support portion 112A is disposed on the optical portion 110 (from the outer peripheral portion 110a). Also go inside. That is, the front end portion 118A of the front support portion 112A enters the space between the optical portion 110 and the ceiling surface 20d. At this time, the root portion 116A of the front support portion 112A is disposed at a position closer to the first inner wall surface 24a than the central axis Lt of the passage 20b, while the root portion 116B of the rear support portion 112B is disposed on the passage 20b. It is arranged at a position closer to the second inner wall surface 24b than the central axis Lt.

  After that, when the intraocular lens 100 is further pushed out toward the distal end 20a side of the insertion portion 20, the intraocular lens 100 has a front support portion 112A in the circumferential direction of the optical portion 110 as shown in FIG. Rotate so that the root portion 116A of the main body is separated from the first inner wall surface 24a and approaches the extrusion shaft Lp (the central axis Lt of the passage 20b) (counterclockwise, in the direction of the solid line arrow shown in FIG. 9). Thereby, the front support portion 112 </ b> A further enters the inside of the optical unit 110. Details of the front support portion 112A entering the inside of the optical portion 110 as shown in FIG. 9 from the state shown in FIG. 8 will be described later.

  Then, when the intraocular lens 100 is further pushed out toward the distal end 20a side of the insertion portion 20, as shown in FIG. 11, the front support portion 112A is further bent and bent at the root portion 116A. The state of being placed on the surface of the portion 110 on the ceiling surface 20d side is maintained. Further, the optical unit 110 is further bent in a small manner so as to be valley-folded toward the back side of the sheet of FIG. It should be noted that the rear support portion 112B is also maintained on the surface of the optical unit 110 on the ceiling surface 20d side.

  After that, when the intraocular lens 100 is further pushed out toward the distal end 20a side of the insertion portion 20, the front support portion 112A and the rear support portion 112B are placed on the surface of the optical portion 110 on the ceiling surface 20d side. In addition, in a state where the optical unit 110 is valley-folded toward the bottom surface 20e and is bent small, the optical unit 110 is pushed out of the insertion unit 20 from the distal end 20a of the insertion unit 20 and moves into the eye. In this way, the folded intraocular lens 100 is inserted into the eye.

  Here, the details of the front support portion 112A entering the inside of the optical portion 110 as shown in FIG. 9 from the state shown in FIG. 8 will be described.

  Therefore, first, a comparative example in which the first protrusion 32 does not include the protruding portion 36 will be described before the description of the present embodiment.

  In such a comparative example, when the intraocular lens 100 is pushed out from the state shown in FIG. 8 toward the distal end 20a side of the insertion portion 20, as shown in FIG. Continue on the extrusion shaft Lp.

  Then, the intraocular lens 100 is pushed out toward the distal end 20a side of the insertion portion 20 while the amount δ0 of the front support portion 112A entering the inside of the optical portion 110 is small. At this time, the distance between the position of the end portion 117A on the first inner wall surface 24a side in the root portion 116A of the front support portion 112A and the position of the extrusion shaft Lp is defined as do. Then, since the amount of entry δ0 of the front support portion 112A is small, for example, when the intraocular lens 100 vibrates while traveling in the passage 20b, the front support portion 112A entering the inside of the optical portion 110 becomes the optical portion. There is a risk that it will come out of 110.

  On the other hand, in this embodiment, when the intraocular lens 100 is pushed out from the state shown in FIG. 8 toward the distal end 20a side of the insertion portion 20, as shown in FIG. , Proceeds toward the second inner wall surface 24b. That is, as shown in FIGS. 9 and 10, when the plunger 12 is guided by the guide surface 36a of the protruding portion 36, the distal end 12a of the plunger 12 is disengaged from the extrusion shaft Lp and is more than the extrusion shaft Lp. 2 Proceeds to a position on the inner wall surface 24b side. In this way, the protruding portion 36 advances the tip 12a of the plunger 12 toward the second inner wall surface 24b.

  As described above, when the tip 12a of the plunger 12 advances toward the second inner wall surface 24b, the pushing force P that acts on the intraocular lens 100 from the plunger 12 acts toward the second inner wall surface 24b. To do. Here, although the friction coefficient of the second inner wall surface 24b is constant throughout, the outer peripheral portion of the optical unit 110 is increased by increasing the force that presses the optical unit 110 against the second inner wall surface 24b by the pushing force P. The frictional force generated between 110a and the second inner wall surface 24b (reaction force that the outer peripheral portion 110a of the optical unit 110 receives from the second inner wall surface 24b) increases. Accordingly, the contact portion of the outer peripheral portion 110 a of the optical unit 110 with the second inner wall surface 24 b is difficult to advance toward the distal end 20 a side of the insertion portion 20. On the other hand, the frictional force generated between the outer peripheral portion 110a of the optical unit 110 and the first inner wall surface 24a (reaction force that the outer peripheral portion 110a of the optical unit 110 receives from the first inner wall surface 24a) is reduced. The contact portion of the outer peripheral portion 110 a of the 110 with the first inner wall surface 24 a is likely to advance toward the distal end 20 a side of the insertion portion 20. Therefore, the intraocular lens 100 rotates in the circumferential direction of the optical unit 110 so that the root portion 116A of the front support portion 112A is separated from the first inner wall surface 24a and approaches the extrusion axis Lp.

  At this time, the distance between the position of the end portion 117A on the first inner wall surface 24a side of the base portion 116A of the front support portion 112A and the position of the extrusion shaft Lp is d, which is smaller than the distance do. Then, the intrusion amount δ1 of the front support portion 112A in which the front support portion 112A enters the inside of the optical unit 110 is larger (than the intrusion amount δ0).

  As described above, since the inflow amount δ1 of the front support portion 112A is increased, even if the intraocular lens 100 subsequently vibrates while traveling in the passage 20b, for example, the front support enters the inside of the optical portion 110. The portion 112 </ b> A is prevented from coming out of the optical portion 110.

  After that, when the intraocular lens 100 is further pushed out toward the distal end 20a side of the insertion portion 20, as shown in FIG. 11, the plunger 12 is curved, and the distal end 12a of the plunger 12 is pushed to the extrusion axis Lp. Return to top. Thereafter, the intraocular lens 100 is ejected to the outside of the insertion unit 20 in a suitable shape. At this time, it is sufficient that the intraocular lens 100 is ejected to the outside of the insertion portion 20. For example, the distal end 12 a of the plunger 12 may not protrude from the distal end 20 a of the insertion portion 20 to the outside. Further, for example, in a state where the tip 12a of the plunger 12 protrudes from the tip 20a, the portion of the plunger 12 that protrudes does not need to be along the extrusion axis Lp.

  Thus, in the present embodiment, the protruding portion 36 controls the orientation of the intraocular lens 100 in the circumferential direction of the optical unit 110 by causing the tip 12a of the plunger 12 to advance toward the second inner wall surface 24b. To do.

  In the above description, as shown in FIG. 9, the optical portion 110 </ b> A is later than when the front end portion 118 </ b> A of the front support portion 112 </ b> A is disposed inside the outer peripheral portion 110 a of the optical portion 110 (see FIG. 8). Although the direction of the intraocular lens 100 with respect to the circumferential direction is controlled, it is not particularly limited to this, and the front end portion 118A of the front support portion 112A is adjusted to the outer peripheral portion of the optical portion 110 by adjusting the position of the protruding portion 36 or the like. The orientation of the intraocular lens 100 with respect to the circumferential direction of the optical unit 110 may be controlled at the same time as being disposed inside 110a.

  As a modification, as shown in FIG. 12, the passage 20b may be formed of a deflection passage (lens control mechanism) in which the central axis Lt of the passage 20b intersects the extrusion axis Lp. That is, the central axis Lt of the passage 20b intersects with the extrusion axis Lp while being inclined in the radial direction (Y-axis direction) of the optical unit 110 when the intraocular lens 100 is disposed in the passage 20b. Good. As an example, the inclination angle α of the central axis Lt of the passage 20b with respect to the extrusion axis Lp is 5 °. In FIG. 12, the direction of the central axis Lt of the passage 20b is defined as the X-axis direction.

  Thereby, the inclination of the 1st inner wall surface 24a and the 2nd inner wall surface 24b with respect to the extrusion axis | shaft Lp is varied. Specifically, the inclination of the second inner wall surface 24b with respect to the extrusion axis Lp is larger than that of the first inner wall surface 24a with respect to the extrusion axis Lp. The second inner wall surface 24b intersects with the extrusion shaft Lp.

  Therefore, in this modified example, when the tip end 12a of the plunger 12 is advanced on the extrusion shaft Lp, the tip end 12a of the plunger 12 is advanced toward the second inner wall surface 24b. And when the front-end | tip 12a of the plunger 12 advances toward the 2nd inner wall surface 24b in this way, the intraocular lens 100 will rotate like the time of said FIG. 9 (refer FIG. 12).

  Also in this modification, the first inner wall surface 24a and the second inner wall surface 24b are formed in a symmetrical shape (inclination) with respect to the central axis Lt of the passage 20b. In the example shown in FIG. 12, the entire passage 20b is configured by a deflection passage. However, as another modification, only a part of the passage 20b may be configured by a deflection passage. For example, a portion on the distal end 20a side of the insertion portion 20 with respect to a predetermined position in the passage 20b may be configured by a deflection passage. That is, the center axis Lt of the portion on the distal end 20a side of the insertion portion 20 with respect to the predetermined position in the passage 20b intersects the extrusion axis Lp, while the center of the portion on the opposite side of the distal end 20a from the predetermined position of the passage 20b. The axis Lt may be formed in parallel with the extrusion axis Lp.

  As other modifications, a first frictional force generated between the first inner wall surface 24 a and the outer peripheral portion 110 a of the optical unit 110 of the intraocular lens 100, and the second inner wall surface 24 b and the optical unit 110 of the intraocular lens 100 are used. The second frictional force generated between the outer peripheral portion 110a and the outer peripheral portion 110a may be changed. In the present embodiment, the second frictional force is made larger than the first frictional force by making the surface roughness of the second inner wall surface 24b larger than the surface roughness of the first inner wall surface 24a. Thereby, the direction of the circumferential direction of the optical part 110 of the intraocular lens 100 can be controlled.

  That is, the contact portion of the outer peripheral portion 110 a of the optical unit 110 with the second inner wall surface 24 b is difficult to advance toward the distal end 20 a side of the insertion unit 20. On the other hand, the contact portion of the outer peripheral portion 110a of the optical unit 110 with the first inner wall surface 24a is likely to advance toward the distal end 20a side of the insertion portion 20. Therefore, the intraocular lens 100 rotates as in the case of FIG. Therefore, the amount of entry δ1 of the front support portion 112A can be increased.

  As described above, according to the present disclosure, the intraocular lens 100 is pushed out toward the distal end 20a of the insertion portion 20, the front support portion 112A is bent, and the distal end portion 118A is on the inner side of the outer peripheral portion 110a of the optical unit 110. Thereafter, the orientation of the intraocular lens 100 in the circumferential direction of the optical unit 110 is controlled. Note that “after the end portion 118A is disposed inside the outer peripheral portion 110a of the optical unit 110” is the same as when the front end portion 118A is disposed inside the outer peripheral portion 110a of the optical unit 110, or That is, after the front end portion 118 </ b> A is disposed inside the outer peripheral portion 110 a of the optical unit 110.

  Thereby, the amount of entry δ1 of the front support portion 112A entering the inside of the optical unit 110 can be controlled. Therefore, it is possible to suppress the front support portion 112A that has once entered the inside of the optical unit 110 from coming out of the optical unit 110 by controlling the amount of entry δ1 of the front support portion 112A to be large. Therefore, when the intraocular lens 100 is inserted into the eye, the front support portion 112A can be bent and placed on the optical unit 110. Therefore, the intraocular lens 100 can be suitably deformed and ejected.

  Further, the protruding portion 36 controls the orientation of the intraocular lens 100 in the circumferential direction of the optical portion 110 by causing the tip 12a of the plunger 12 to advance toward the second inner wall surface 24b. Accordingly, the intraocular lens 100 rotates in the circumferential direction of the optical unit 110 so that the root portion 116A of the front support portion 112A is separated from the first inner wall surface 24a and approaches the extrusion axis Lp. Therefore, the amount of entry δ1 of the front support portion 112A can be increased more effectively.

  Further, the protruding portion 36 projects from the ceiling surface 20d side toward the bottom surface 20e side in the passage 20b. Thereby, the front-end | tip 12a of the plunger 12 is made to contact the protrusion part 36, and the advancing direction of the front-end | tip 12a of the plunger 12 can be controlled.

  Further, the protruding portion 36 is formed at a position on the distal end 20a side of the insertion portion 20 of the first protrusion 32 in the X-axis direction, and protrudes to the guide portion 30 side from the guide surface 32b of the first protrusion 32 in the Y-axis direction. Yes. In the present embodiment, the front end portion 36b of the protruding portion 36 extends from the position closer to the first inner wall surface 24a than the central portion Ce of the passage 20b in the Y-axis direction, beyond the central portion Ce of the passage 20b. It is formed over a position closer to the second inner wall surface 24b than the center portion Ce. Thereby, the front-end | tip 12a of the plunger 12 becomes easy to advance further toward the 2nd inner wall surface 24b.

  The central axis Lt of the passage 20b is closer to the first inner wall surface 24a in the radial direction (Y-axis direction) of the optical unit 110 when the intraocular lens 100 is disposed in the passage 20b with respect to the extrusion axis Lp. It may be inclined. Thereby, if the front-end | tip 12a of the plunger 12 is advanced on the extrusion axis | shaft Lp, it can be advanced toward the 2nd inner wall surface 24b. Therefore, the intraocular lens 100 rotates in the circumferential direction of the optical unit 110 so that the root portion 116A of the front support portion 112A is separated from the first inner wall surface 24a and approaches the extrusion axis Lp. Therefore, the amount of entry δ1 of the front support portion 112A can be increased more effectively.

  In addition, the magnitude of the first frictional force generated between the first inner wall surface 24a and the outer peripheral portion 110a of the optical unit 110, and the second generated between the second inner wall surface 24b and the outer peripheral portion 110a of the optical unit 110. The magnitude of the frictional force may be changed. Then, by making the second frictional force greater than the first frictional force, the intraocular lens 100 pushes the root portion 116A of the front support portion 112A away from the first inner wall surface 24a in the circumferential direction of the optical portion 110. It rotates so that it may approach the axis | shaft Lp. Therefore, the amount of entry δ1 of the front support portion 112A can be increased.

<Second embodiment>
Next, a second example of the first embodiment will be described. Here, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof will be omitted, and differences from the first embodiment will be mainly described.

  Depending on the shape and hardness of the intraocular lens 100, the friction coefficient of the first inner wall surface 24a, and the like, the tip 12a of the plunger 12 is advanced toward the first inner wall surface 24a, so that the intraocular lens 100 is moved to the optical unit 110. You may rotate so that the base part 116A of the front support part 112A may leave | separate from the 1st inner wall surface 24a, and may approach the extrusion axis | shaft Lp about the circumferential direction.

  Therefore, in this embodiment, as shown in FIG. 14, the positional relationship between the first protrusion 32 and the second protrusion 34 is reversed with respect to the first embodiment (see FIG. 3). That is, the second protrusion 34 constitutes one wall surface of the guide portion 30 (the lower side of FIG. 14, the first inner wall surface 24a side), and the first protrusion 32 is the other of the guide portion 30 (the upper side of FIG. This constitutes the wall surface on the second inner wall surface 24b side).

  In the present embodiment having such a configuration, when the intraocular lens 100 is pushed out toward the distal end 20a side of the insertion portion 20, the distal end 12a of the plunger 12 is placed on the first inner wall surface 24a as shown in FIG. Proceed toward. That is, as shown in FIG. 15, when the plunger 12 is guided by the guide surface 36a of the protruding portion 36, the distal end 12a of the plunger 12 is disengaged from the extrusion shaft Lp, and the first inner wall surface from the extrusion shaft Lp. Proceed to the position on the 24a side. In this way, the protruding portion 36 advances the tip 12a of the plunger 12 toward the first inner wall surface 24a.

  When the distal end 12a of the plunger 12 advances toward the first inner wall surface 24a in this way, the pushing force P that acts on the intraocular lens 100 from the plunger 12 acts toward the first inner wall surface 24a side. To do. Here, the friction coefficient of the first inner wall surface 24a is constant over the whole and is sufficiently small by coating or the like. Therefore, the intraocular lens 100 is rotated by the pushing force P so that the root portion 116A of the front support portion 112A moves away from the first inner wall surface 24a and approaches the extrusion axis Lp in the circumferential direction of the optical unit 110.

  Thus, in the present embodiment, the protruding portion 36 controls the orientation of the intraocular lens 100 in the circumferential direction of the optical portion 110 by causing the distal end 12a of the plunger 12 to advance toward the first inner wall surface 24a. To do.

  Accordingly, the intraocular lens 100 rotates in the circumferential direction of the optical unit 110 so that the root portion 116A of the front support portion 112A is separated from the first inner wall surface 24a and approaches the extrusion axis Lp. Therefore, the amount of entry δ1 of the front support portion 112A can be increased more effectively.

  Further, as a modification of the second embodiment, as shown in FIG. 16, the passage 20b may be constituted by a deflection passage (lens control mechanism) in which the central axis Lt of the passage 20b intersects the extrusion axis Lp. Specifically, the inclination of the first inner wall surface 24a with respect to the extrusion axis Lp is larger than that of the second inner wall surface 24b with respect to the extrusion axis Lp. The first inner wall surface 24a intersects with the extrusion shaft Lp.

  Therefore, in this modification, when the tip end 12a of the plunger 12 is advanced on the extrusion shaft Lp, the tip end 12a of the plunger 12 advances toward the first inner wall surface 24a. When the distal end 12a of the plunger 12 advances toward the first inner wall surface 24a in this way, the intraocular lens 100 rotates as in the case of FIG. 15 (see FIG. 16).

  Thus, the central axis Lt of the passage 20b is the second inner wall surface 24b in the radial direction (Y-axis direction) of the optical unit 110 when the intraocular lens 100 is disposed in the passage 20b with respect to the extrusion axis Lp. It may be inclined to the side. Thereby, if the front-end | tip 12a of the plunger 12 is advanced on the extrusion axis | shaft Lp, it can be advanced toward the 1st inner wall surface 24a. Therefore, the intraocular lens 100 rotates in the circumferential direction of the optical unit 110 so that the root portion 116A of the front support portion 112A is separated from the first inner wall surface 24a and approaches the extrusion axis Lp. Therefore, the amount of entry δ1 of the front support portion 112A can be increased more effectively.

  The technique exemplified in the above embodiment can be applied to a preset type intraocular lens insertion device in which the intraocular lens 100 is filled in advance, or an intraocular lens that is shipped without being filled with the intraocular lens 100 in advance. It can also be applied to insertion instruments. The intraocular lens 100 exemplified in the above embodiment is a one-piece type intraocular lens in which an optical unit 110, a front support unit 112A, and a rear support unit 112B are integrally formed. However, the technique exemplified in the above embodiment can also be applied to an intraocular lens insertion device for inserting an intraocular lens other than a one-piece type (for example, a three-piece intraocular lens). Further, the root portions 116A and 116B of the intraocular lens 100 may be directly connected to the outer peripheral portion of the optical unit 110 without passing through the connection portions 114A and 114B.

[Second Embodiment]
Next, the second embodiment will be described. Components that are the same as those in the first embodiment are denoted by the same reference numerals, description thereof will be omitted, and differences from the first embodiment will be mainly described.

  In the present embodiment, as shown in FIGS. 17 to 19, the placement unit 22 includes a passage 22 a, a ceiling surface 22 b, a bottom surface 22 c, an inner wall surface 22 d (rear inner wall surface), a guide unit 30, A first guide protrusion 33, a second guide protrusion 35, a first protrusion 40, a second protrusion 42, and the like are provided.

  As shown in FIG. 18, the inner wall surface 22d (first inner wall surface 26a (first rear inner wall surface) and second inner wall surface 26b (second rear inner wall surface)) is a direction orthogonal to the direction of the central axis Lt of the passage 22a. And it is formed on both sides in a direction parallel to the radial direction of the optical unit 110 when the intraocular lens 100 is disposed in the passage 22a. Specifically, the first inner wall surface 26a is located on the side where the root portion 116A of the front support portion 112A is disposed when the intraocular lens 100 is disposed in the passage 22a with respect to the central axis Lt of the passage 22a. Is formed. On the other hand, the second inner wall surface 26b is formed at a position on the side where the root portion 116B of the rear support portion 112B is disposed when the intraocular lens 100 is disposed in the passage 22a with respect to the central axis Lt of the passage 22a. Has been.

  The guide portion 30 is a portion that is formed on the ceiling surface 22 b and guides the pushing direction of the plunger 12. The first guide protrusion 33 and the second guide protrusion 35 are formed along the pushing direction of the plunger 12. The first guide protrusion 33 constitutes one wall surface (the lower side in FIG. 17) of the guide portion 30 and protrudes from the ceiling surface 22b to the bottom surface 22c side (the front side in FIG. 17). The second guide protrusion 35 constitutes the other wall surface (the upper side in FIG. 17) of the guide portion 30 and protrudes from the ceiling surface 22b to the bottom surface 22c side (the front side in FIG. 17).

  In the present embodiment, as shown in FIG. 17, the first protrusion 40 is formed so as to protrude from the first inner wall surface 26a toward the central axis Lt side of the passage 22a. Moreover, the 1st protrusion 40 is formed so that it may protrude toward the bottom face 22c side from the ceiling surface 22b, as shown in FIG. In the example shown in FIG. 17, the first protrusion 40 is formed in an elongated shape in parallel with the central axis Lt of the passage 22a at the position of the end portion on the insertion portion 20 side in the passage 22a.

  The first protrusion 40 includes an inner side surface 40a (first contact portion, optical contact portion) and an inclined portion 40b. The inner side surface 40a is formed at the tip end portion of the first protrusion 40 that protrudes from the first inner wall surface 26a toward the central axis Lt side of the passage 22a. In this way, the inner side surface 40a of the first protrusion 40 is positioned on the side of the central axis Lt of the passage 22a relative to the first inner wall surface 26a, that is, between the first inner wall surface 26a and the central axis Lt of the passage 22a. Formed in position. In the example shown in FIG. 17, the inner side surface 40 a of the first protrusion 40 is formed at a position between the first inner wall surface 26 a and the first guide protrusion 33.

  In the present embodiment, the distance D between the inner surface 40a of the first protrusion 40 and the central axis Lt of the passage 22a is smaller than the radius of the optical unit 110. And the inner surface 40a of the 1st protrusion 40 is formed in the position which contacts the outer peripheral part 110a of the optical part 110 at the time of extrusion of the intraocular lens 100 which is mentioned later.

  The inclined portion 40b is formed at the position of the rear end portion of the first protrusion 40 in the pushing direction of the plunger 12, and from the first inner wall surface 26a to the center of the passage 22a toward the front in the pushing direction of the plunger 12. The protrusion amount toward the axis Lt is formed so as to gradually increase. That is, the inclined portion 40 b is formed along a direction that is inclined with respect to the pushing direction of the plunger 12.

  In the present embodiment, as shown in FIG. 17, the second protrusion 42 is formed at a position closer to the central axis Lt side of the passage 22a and the passage 20b than the second inner wall surface 26b and the second inner wall surface 24b. . As shown in FIG. 19, the second protrusion 42 is formed so as to protrude from the ceiling surface 22b toward the bottom surface 22c. As shown in FIG. 17, the second protrusion 42 is formed in an elongated shape parallel to the central axis Lt of the passage 20b and the passage 22a at a position straddling the boundary between the passage 22a and the passage 20b.

  The second protrusion 42 includes an inner side surface 42a (second contact portion, support contact portion). The inner side surface 42a is a surface formed on the side of the central axis Lt of the passage 22a in the second protrusion 42. In this way, the inner side surface 42a of the second protrusion 42 is located on the side closer to the central axis Lt of the passage 22a than the second inner wall surface 26b, that is, between the second inner wall surface 26b and the central axis Lt of the passage 22a. Formed in position. In the example shown in FIG. 17, a part of the inner side surface 42 a of the second protrusion 42 is formed at a position between the second inner wall surface 26 b and the second guide protrusion 35.

  In the present embodiment, the inner surface 42a of the second protrusion 42 is after the outer peripheral portion 110a of the optical unit 110 is separated from the inner surface 40a of the first protrusion 40 when the intraocular lens 100 is pushed out as will be described later. In addition, when the front support part 112A and the optical part 110 are disposed in the passage 20b, the front support part 112A and the optical part 110 are formed at a position in contact with the root part 116B of the rear support part 112B from the second inner wall surface 26b side.

  Here, as shown in FIGS. 17 to 19 and the like, assuming the X axis, the Y axis, and the Z axis orthogonal to each other, the direction parallel to the push-out direction of the intraocular lens 100 (the central axis Lt of the passage 20b and the passage 22a). Direction, extrusion axis Lp direction) is defined as the X-axis direction. Then, the passage 20b includes two inner wall surfaces 20c (first inner wall surface 24a and second inner wall surface 24b) formed on both sides in the Y-axis direction, and a ceiling surface 20d and a bottom surface 20e formed on both sides in the Z-axis direction. It is surrounded by. The passage 22a includes two inner wall surfaces 22d (first inner wall surface 26a and second inner wall surface 26b) formed on both sides in the Y-axis direction, and a ceiling surface 22b and a bottom surface 22c formed on both sides in the Z-axis direction. (See FIG. 19) and the like.

  Next, as an operation of the injector 1, a method for inserting the intraocular lens 100 using the injector 1 into the eye will be described.

  First, as shown in FIG. 18, the operator who operates the injector 1 places the intraocular lens 100 in the passage 22 a of the placement portion 22, and the front support portion 112 </ b> A has a distal end 20 a of the insertion portion 20 rather than the optical portion 110. Arrange them so that they are on the side. At this time, in the example shown in FIG. 18, the root portion 116A of the front support portion 112A is in contact with the first inner wall surface 26a of the placement portion 22, and the root portion 116A of the front support portion 112A and the placement portion. No gap is formed between the first inner wall surface 26a of 22.

  Then, the surgeon pushes the rear support portion 112 </ b> B with the plunger 12. As a result, the base portion 116B of the rear support portion 112B is curved, and the rear support portion 112B is bent inside the outer peripheral portion 110a of the optical portion 110 and placed on the optical portion 110. In this manner, the intraocular lens 100 is disposed in the passage 22 a in a state where the rear support portion 112 </ b> B is bent inside the optical portion 110.

  Thereafter, the surgeon further pushes the outer peripheral portion 110 a of the optical unit 110 with the plunger 12. Then, the intraocular lens 100 is pushed out toward the distal end 20a side of the insertion portion 20 while the root portion 116A of the front support portion 112A is in contact with the inner side surface 40a of the first protrusion 40.

  Then, after the root portion 116A of the front support portion 112A is separated from the inner side surface 40a of the first protrusion 40, the outer peripheral portion 110a of the optical portion 110 is guided to the inclined portion 40b of the first protrusion 40, and the intraocular lens 100 is moved. The insertion portion 20 is pushed toward the distal end 20a side.

  As shown in FIGS. 20 and 21, the end 120 on the first inner wall surface 26 a side of the outer peripheral portion 110 a of the optical unit 110 contacts the inner side surface 40 a of the first protrusion 40. At this time, the optical unit 110 is pushed by the first protrusion 40 and moves to the second inner wall surface 26b side. Therefore, the optical axis L of the optical unit 110 deviates from the position of the central axis Lt of the passage 22a and moves to a position away from the central axis Lt by the distance δ (see FIG. 21) on the second inner wall surface 26b side. Accordingly, at the same time, the root portion 116A of the front support portion 112A is separated from the first inner wall surface 26a. A gap C0 is formed between the root portion 116A of the front support portion 112A and the first inner wall surface 26a. Therefore, the base portion 116A of the front support portion 112A does not receive interference from the first inner wall surface 26a.

  By forming the gap C0 in this way, as will be described in detail later, when the intraocular lens 100 is pushed out into the passage 20b by the plunger 12, the first portion 116A of the front support portion 112A and the first portion The gap C1 is easily formed between the inner wall surface 24a.

  Thereafter, when the intraocular lens 100 is further pushed out toward the distal end 20a side of the insertion portion 20, the intraocular lens 100 is pushed out from the passage 22a into the passage 20b. Specifically, as shown in FIGS. 22 and 23, the outer peripheral portion 110 a of the optical unit 110 is separated from the inner surface 40 a of the first protrusion 40, and the front support portion 112 </ b> A and the optical portion 110 are in the passage 20 b of the insertion portion 20. Move to. As a result, the optical unit 110 is not pushed by the first protrusion 40, and thus moves to the first inner wall surface 24a (first inner wall surface 26a) side. Then, the optical axis L of the optical unit 110 moves to the position of the central axis Lt of the passage 20b (passage 22a).

  At this time, the inner side surface 42a of the second protrusion 42 comes into contact with the portion 122 on the second inner wall surface 26b side in the root portion 116B of the rear support portion 112B from the second inner wall surface 26b side. Thereby, the posture of the intraocular lens 100 is maintained.

  That is, the details are as follows. First, the optical unit 110 is not pushed by the first protrusion 40, and contacts the inner wall surface 20c of the insertion unit 20 and receives stress from the inner wall surface 20c. Therefore, the optical unit 110 tends to rotate (clockwise in FIG. 22) in the direction in which the root portion 116B of the rear support unit 112B approaches the second inner wall surface 26b (for example, around the optical axis L). However, since the inner side surface 42a of the second protrusion 42 is in contact with the root portion 116B of the rear support portion 112B, the optical portion 110 rotates in a direction in which the root portion 116B of the rear support portion 112B approaches the second inner wall surface 26b. That is suppressed. Therefore, since the gap C0 formed between the root portion 116A of the front support portion 112A and the first inner wall surface 26a of the placement portion 22 is maintained as described above, the insertion is performed with the root portion 116A of the front support portion 112A. A gap C1 is also formed between the portion 20 and the first inner wall surface 24a. Therefore, the base portion 116A of the front support portion 112A does not receive interference from the first inner wall surface 24a.

  Thus, in the present embodiment, as described above, the optical portion 110 is pushed by the first protrusion 40, whereby the gap C0 is formed between the root portion 116A of the front support portion 112A and the first inner wall surface 26a. It had been. Thereby, when the intraocular lens 100 is pushed out to the distal end 20a in the passage 20b of the insertion portion 20 thereafter, a gap C1 is formed between the root portion 116A of the front support portion 112A and the first inner wall surface 24a. It becomes easy to be done.

  In addition, the second protrusion 42 prevents the optical portion 110 from rotating in the direction in which the root portion 116B of the rear support portion 112B approaches the second inner wall surface 26b, so that the root portion 116A and the insertion portion 20 of the front support portion 112A are rotated. The gap C1 is easily formed between the first inner wall surface 24a.

  In the present embodiment, the optical part 110 is pushed by the first protrusion 40 and the optical part 110 is rotated by the second protrusion 42 in a direction in which the root portion 116B of the rear support part 112B approaches the second inner wall surface 26b. Is suppressed. Accordingly, even when the optical unit 110 is separated from the first protrusion 40, the posture of the intraocular lens 100 is maintained in a state where the optical unit 110 is in contact with the first protrusion 40. Therefore, the gap C1 is further easily formed between the base portion 116A of the front support portion 112A and the first inner wall surface 24a of the insertion portion 20.

  Thereafter, when the intraocular lens 100 is further pushed out toward the distal end 20a side of the insertion portion 20, as shown in FIG. 24, the outer peripheral portion 110a of the optical portion 110 is placed in the inner wall surface 20c of the insertion portion 20 in the passage 20b. The optical unit 110 is bent so as to be valley-folded toward the bottom surface 20e side (the back side in FIG. 24).

  At this time, the front support portion 112A simultaneously contacts the second inner wall surface 24b, so that the root portion 116A is gradually bent and bent toward the optical portion 110 side.

  Here, in the present embodiment, as shown in FIG. 22, the gap C1 is formed between the root portion 116A of the front support portion 112A and the first inner wall surface 24a. Therefore, when the intraocular lens 100 is pushed out, the root portion 116A of the front support portion 112A does not receive interference from the first inner wall surface 24a. As described above, the root portion 116A of the front support portion 112A does not receive interference from the first inner wall surface 24a, while the front end portion 118A of the front support portion 112A is strongly pressed by the second inner wall surface 24b. Therefore, the front end portion 118A of the front support portion 112A is likely to receive a reaction force from the second inner wall surface 24b. Therefore, since the front end portion 118A of the front support portion 112A is guided to the inside of the optical portion 110, the amount of penetration of the front support portion 112A to the inside of the optical portion 110 increases as shown in FIG. As the amount of the front support portion 112A entering the optical portion 110 increases, the front support portion 112A is still placed on the surface of the optical portion 110 on the ceiling surface 20d side. Maintained.

  In this way, the front support portion 112A is disposed on the inner side of the optical portion 110 (than the outer peripheral portion 110a) such that the front end portion 118A of the front support portion 112A is disposed on the inner side of the outer peripheral portion 110a of the optical portion 110. Get in. That is, the front end portion 118A of the front support portion 112A enters the space between the optical portion 110 and the ceiling surface 20d.

  Then, when the intraocular lens 100 is further pushed out toward the distal end 20a side of the insertion portion 20, as shown in FIG. 25, the optical portion 110 is further bent so as to be further valley-folded.

  At this time, when the gap C1 is not formed between the root portion 116A of the front support portion 112A and the first inner wall surface 24a, the root portion 116A of the front support portion 112A has the shape of the first inner wall surface 24a. There is a possibility that it may be folded so as to be twisted inside the passage 20b. Then, after that, when the intraocular lens 100 is further pushed out toward the distal end 20a side of the insertion portion 20, the front support portion 112A having elastic force tends to extend while canceling the twisted state. There is a possibility that the support part 112 </ b> A may come out of the optical part 110.

  However, in the present embodiment, a gap C1 is formed between the root portion 116A of the front support portion 112A and the first inner wall surface 24a, and the root portion 116A of the front support portion 112A is separated from the first inner wall surface 24a. ing. Therefore, the root portion 116A of the front support portion 112A is difficult to be folded so as to be twisted inside the passage 20b following the shape of the first inner wall surface 24a. Then, the root portion 116A of the front support portion 112A is in a standing state (a state in which the outer peripheral surface 119A of the root portion 116A is disposed on the front side in FIG. 25), following the valley folding of the optical unit 110. Become. Then, since the root portion 116A of the front support portion 112A is in a standing state in this manner, the front support portion 112A is easily maintained on the surface of the optical unit 110 on the ceiling surface 20d side. Become.

  Then, when the intraocular lens 100 is further pushed out toward the distal end 20a side of the insertion portion 20, as shown in FIG. 26, the front support portion 112A is further bent and bent at the root portion 116A. The state of being placed on the surface of the portion 110 on the ceiling surface 20d side is maintained. In addition, the optical unit 110 is further bent in a small manner so as to be valley-folded toward the back side in FIG. It should be noted that the rear support portion 112B is also maintained on the surface of the optical unit 110 on the ceiling surface 20d side.

  In the present embodiment, as shown in FIG. 24, the amount of the front support portion 112A entering the inside of the optical unit 110 increases, and the root portion 116A of the front support portion 112A stands as shown in FIG. For example, even when the intraocular lens 100 pushed out of the passage 20b vibrates, the front support portion 112A is maintained on the surface of the optical unit 110 on the ceiling surface 20d side. The

  After that, when the intraocular lens 100 is further pushed out toward the distal end 20a side of the insertion portion 20, the front support portion 112A and the rear support portion 112B of the intraocular lens 100 are located on the ceiling surface 20d side of the optical portion 110. In a state where the optical unit 110 is placed on the surface and the optical unit 110 is valley-folded toward the bottom surface 20e and bent to a small extent, the optical unit 110 is pushed out from the distal end 20a of the insertion unit 20 to the outside of the insertion unit 20. Moving. In this way, the folded intraocular lens 100 is inserted into the eye.

  In the above-described embodiment, the root portion 116B of the rear support portion 112B is formed on the inner surface 42a of the second protrusion 42 after the outer peripheral portion 110a of the optical unit 110 is separated from the inner surface 40a of the first protrusion 40. Although the contact example is shown, the base portion 116B of the rear support portion 112B contacts the inner side surface 42a of the second projection 42 at the same time when the outer peripheral portion 110a of the optical unit 110 moves away from the inner side surface 40a of the first projection 40. May be.

  Further, the first protrusion 40 may be formed at a position between the first inner wall surface 26a and the central axis Lt of the passage 22a separately from the first inner wall surface 26a. Further, the second protrusion 42 may be formed so as to protrude from the second inner wall surface 26b toward the central axis Lt side of the passage 22a.

  As described above, according to the present disclosure, the inner surface 40a of the first protrusion 40 is formed in the mounting portion 22 at a position closer to the central axis Lt side of the passage 22a than the first inner wall surface 26a. The inner surface 40 a of the first protrusion 40 is formed at a position where the inner surface 100 a contacts the outer peripheral portion 110 a of the optical unit 110 when the intraocular lens 100 is pushed out.

  Accordingly, the optical unit 110 is pushed by the first protrusion 40 and moves from the first inner wall surface 26a side to the position on the central axis Lt side of the passage 22a. Therefore, a gap C0 is formed between the root portion 116A of the front support portion 112A and the first inner wall surface 26a. Therefore, after that, when the intraocular lens 100 is pushed out to the distal end 20a in the passage 20b of the insertion portion 20, a gap C1 is formed between the root portion 116A of the front support portion 112A and the first inner wall surface 24a. It becomes easy. Therefore, the base portion 116A of the front support portion 112A is less likely to receive interference from the first inner wall surface 24a.

  Thus, while the root portion 116A of the front support portion 112A is less likely to be interfered with by the first inner wall surface 24a, the front end portion 118A of the front support portion 112A is strongly pressed by the second inner wall surface 24b. Therefore, the front end portion 118A of the front support portion 112A is likely to receive a reaction force from the second inner wall surface 24b. Therefore, since the front end portion 118A of the front support portion 112A is guided to the inside of the optical portion 110, the amount of penetration of the front support portion 112A to the inside of the optical portion 110 increases. As the amount of the front support portion 112A entering the optical portion 110 increases, the front support portion 112A is still placed on the surface of the optical portion 110 on the ceiling surface 20d side. Maintained. Therefore, the intraocular lens 100 can be folded small with the front support part 112A (and the rear support part 112B) folded and placed on the optical part 110. Therefore, the intraocular lens 100 can be suitably deformed and ejected.

  Further, the distance D between the inner surface 40a of the first protrusion 40 and the central axis Lt of the passage 22a is less than the radius of the optical unit 110. Thereby, when the outer peripheral part 110a of the optical part 110 contacts the inner side surface 40a of the first protrusion 40, the optical axis L of the optical part 110 deviates from the position of the central axis Lt of the path 22a and the central axis of the path 22a. It moves to a position closer to the second inner wall surface 26b than Lt. Therefore, a gap C0 is formed between the root portion 116A of the front support portion 112A and the first inner wall surface 26a.

  Further, the inner side surface 40a of the first protrusion 40 is formed at the tip end portion of the first protrusion 40 protruding from the first inner wall surface 26a toward the central axis Lt of the passage 22a. Thereby, since the optical part 110 is pushed by the first protrusion 40, a gap C0 is formed between the root portion 116A of the front support part 112A and the first inner wall surface 26a. Therefore, after that, when the front support portion 112A is disposed in the passage 20b, the gap C1 is further easily formed between the root portion 116A of the front support portion 112A and the first inner wall surface 24a.

  In the mounting portion 22, an inner side surface 42a of the second protrusion 42 is formed at a position closer to the central axis Lt of the passage 22a than the second inner wall surface 26b. The inner surface 42a of the second protrusion 42 is formed from the second inner wall surface 26b side after the outer peripheral portion 110a of the optical unit 110 is separated from the inner surface 40a of the first protrusion 40 when the intraocular lens 100 is pushed out. It is formed at a position in contact with the root portion 116B of the rear support portion 112B.

  Accordingly, even when the optical unit 110 is separated from the first protrusion 40, the posture of the intraocular lens 100 (the circumferential direction of the optical unit 110) is the state when the optical unit 110 is in contact with the first protrusion 40. Maintained at. Therefore, a gap C <b> 1 is formed between the root portion 116 </ b> A of the front support portion 112 </ b> A and the first inner wall surface 24 a of the insertion portion 20. Therefore, the base portion 116A of the front support portion 112A is not interfered with from the first inner wall surface 24a, and thus the front support portion 112A is easily bent inside the optical portion 110. Therefore, the front support portion 112A can be easily placed on the surface of the optical unit 110 on the ceiling surface 20d side. Note that “after the optical unit 110 is separated from the inner side surface 40a of the first protrusion 40” is the same as when the optical unit 110 is separated from the inner side surface 40a of the first projection 40, or the optical unit 110 is That is, after the distance from the inner surface 40a of one protrusion 40.

  Further, the inner side surface 42a of the second protrusion 42 is a base portion of the rear support portion 112B when the front support portion 112A and the optical portion 110 are disposed in the passage 20b of the insertion portion 20 when the intraocular lens 100 is pushed out. It is formed at a position in contact with 116B. Thereby, even if the optical part 110 contacts the inner wall surface 20c of the insertion part 20 and receives stress from the inner wall surface 20c, the posture of the intraocular lens 100 is such that the optical part 110 is in contact with the first protrusion 40. Maintained in time.

  As a modification, the placement unit 22 may not include the first protrusion 40 but may include the second protrusion 42. According to this modification, the orientation of the intraocular lens 100 in the circumferential direction of the optical unit 110 is controlled by bringing the inner side surface 42a of the second protrusion 42 into contact with the root portion 116B of the rear support portion 112B. Therefore, as shown in FIG. 22, the eye in the circumferential direction of the optical unit 110 is formed so that a gap C1 is formed between the root portion 116A of the front support portion 112A and the first inner wall surface 24a of the insertion portion 20. The orientation of the inner lens 100 can also be controlled.

  Therefore, the technical idea grasped from this modification is described as an additional item below.

[Additional notes]
A disc-shaped optical part; and a first support part and a second support part that extend outward from an outer peripheral portion of the optical part, wherein the first support part and the second support part are based on the center of the optical part. As an intraocular lens insertion device for inserting an intraocular lens formed at a point-symmetrical position into the eye,
A front passage gradually reducing the passage area toward the tip side,
A rear passage formed behind the front passage in the pushing direction of the intraocular lens;
A first inner wall surface formed on both sides of a direction parallel to the radial direction of the optical unit when the intraocular lens is disposed in the rear passage, and is orthogonal to the axial direction of the rear passage. 2 inner walls,
An extrusion member for extruding the intraocular lens,
When the intraocular lens is inserted into the eye, the second support is located in the rear passage with the first support portion positioned closer to the distal end than the optical portion. The intraocular lens is pushed out to the front passage side by the push member while the support portion is bent inside the optical portion, and then the intraocular lens is pushed by the push member in the front passage side in the front passage. The first support part is bent inside the optical part by pushing
The second inner wall surface is formed at a position on a side where a root portion of the second support portion is disposed when the intraocular lens is disposed in the rear passage with respect to a central axis of the rear passage. And
A contact portion is formed at a position closer to the central axis of the rear passage than the second inner wall surface,
The contact portion is formed at a position in contact with a root portion of the second support portion when the intraocular lens is pushed out;
An intraocular lens insertion device.

[Third Embodiment]
As the third embodiment, a combination of the first embodiment and the second embodiment is also conceivable. As an example, the injector 1 of the present embodiment includes a protruding portion 36, a first protrusion 40, and a second protrusion 42.

  According to the present embodiment, when the intraocular lens 100 is pushed out by the plunger 12, first, the optical part 110 is pushed by the first protrusion 40, whereby the root portion 116A of the front support part 112A and the first inner wall surface 26a. A gap C0 is formed between the two. After that, when the intraocular lens 100 is pushed out toward the distal end 20a in the passage 20b of the insertion portion 20, the posture of the intraocular lens 100 is maintained by the second protrusion 42, so that the root portion of the front support portion 112A A gap C1 is formed between 116A and the first inner wall surface 24a. Therefore, the base portion 116A of the front support portion 112A is less likely to receive interference from the first inner wall surface 24a.

  In this way, the base portion 116A of the front support portion 112A is made difficult to receive interference from the first inner wall surface 24a, and the protruding portion 36 causes the tip 12a of the plunger 12 to be moved to the first inner wall surface 24a or the second inner wall surface 24a. Since it advances toward the inner wall surface 24b, the orientation of the intraocular lens 100 in the circumferential direction of the optical unit 110 can be easily controlled. Therefore, the intraocular lens 100 is easily rotated in the circumferential direction of the optical unit 110 so that the root portion 116A of the front support portion 112A is separated from the first inner wall surface 24a and approaches the extrusion shaft Lp. Therefore, since the amount of entry δ1 of the front support portion 112A can be controlled to be increased, the front support portion 112A can be bent and placed on the optical unit 110 when the intraocular lens 100 is inserted into the eye. . Therefore, the intraocular lens 100 can be suitably deformed and ejected.

  In addition, the form which combined 1st Embodiment and 2nd Embodiment is not restricted above. What is necessary is just to combine at least any one of the structure contained only in 1st Embodiment, and the structure contained only in 2nd Embodiment. For example, the injector 1 may only have the protruding portion 36 and the first protrusion 40. That is, the injector 1 combining the first embodiment and the second embodiment may not have the second protrusion 42. In other words, the injector 1 may be configured such that the optical unit 110 is pushed by the first protrusion 40 and the protruding portion 36 advances the tip 12a of the plunger 12 toward the first inner wall surface 24a or the second inner wall surface 24b. Good.

1 Injector 10 Tube body (main body)
12 Plunger 12a Tip 20 Insertion portion 20a Tip 20b Passage 20c Inner wall surface 20d Ceiling surface 20e Bottom surface 22 Mounting portion 22a Passage 22b Ceiling surface 22c Bottom surface 22d Inner wall surface 24a First inner wall surface 24b Second inner wall surface 26a First inner wall surface 26b Second inner wall surface 30 Guide portion 32 First projection 34 Second projection 36 Projection portion 36a Guide surface 40 First projection 40a Inner side surface 42 Second projection 42a Inner side surface 100 Intraocular lens 110 Optical portion 110a Outer peripheral portion 112A Front support portion 112B Back support portion 116A Root portion 116B Root portion 118A Tip portion 118B Tip portion 120 End portion 122 Portion Lt (Passage) center axis Lp Extrusion shaft C0 Clearance C1 Clearance D Distance

Claims (12)

An intraocular lens insertion device for inserting an intraocular lens comprising a disk-shaped optical unit and a first support unit extending outward from an outer peripheral portion of the optical unit,
A passage where the passage area gradually decreases toward the tip side,
Inner wall surfaces formed on both sides in a direction orthogonal to the axial direction of the passage and parallel to the radial direction of the optical portion of the intraocular lens disposed in the passage;
An extrusion member for extruding the intraocular lens;
The intraocular lens is pushed out to the distal end side by the pushing member in a state where the first support portion is located closer to the distal end side than the optical portion in the passage, and the first support portion is bent and the After the distal end portion of the first support portion is arranged on the inner side of the outer peripheral portion of the optical portion, the contact portion with the intraocular lens in the pushing member is advanced toward the inner wall surface, thereby A lens control mechanism for controlling the orientation of the intraocular lens in the circumferential direction of the optical unit;
An intraocular lens insertion device comprising: The intraocular lens insertion device of claim 1,
The intraocular lens includes a second support portion that extends outward from an outer peripheral portion of the optical portion,
The first support part and the second support part are formed at point-symmetric positions with respect to the center of the optical part,
A first inner wall surface and a second inner wall surface as the inner wall surface;
The root portion of the first support portion is disposed at a position closer to the first inner wall surface than the central axis of the passage,
The root portion of the second support portion is disposed at a position closer to the second inner wall surface than the central axis of the passage,
The lens control mechanism is configured to advance a contact portion of the push-out member with the intraocular lens toward the first inner wall surface;
An intraocular lens insertion device. The intraocular lens insertion device according to claim 1 or 2,
A first axial surface and a second axis formed on both sides in a direction perpendicular to the axial direction of the passage and parallel to the axial direction of the optical portion of the intraocular lens disposed in the passage A directional surface,
The lens control mechanism protrudes from the first axial surface side toward the second axial surface side in the passage;
An intraocular lens insertion device. The intraocular lens insertion device of claim 3,
A guide portion that is formed on the first axial surface and guides the pushing direction of the pushing member;
A protrusion that constitutes a wall surface of the guide part,
The lens control mechanism protrudes toward the guide portion at a position of an end portion on the distal end side of the protrusion;
An intraocular lens insertion device. The intraocular lens insertion device according to claim 1 or 2,
The contact portion of the push member with the intraocular lens proceeds on the push shaft,
The lens control mechanism is a deflection passage that constitutes at least a part of the passage,
A central axis of the deflection path is inclined with respect to the push-out axis toward a radial side of the optical part of the intraocular lens disposed in the path;
An intraocular lens insertion device. An intraocular lens insertion device for inserting an intraocular lens comprising a disk-shaped optical unit and a first support unit extending outward from an outer peripheral portion of the optical unit,
A passage where the passage area gradually decreases toward the tip side,
A first inner wall surface and a second inner wall surface formed on both sides in a direction perpendicular to the axial direction of the passage and parallel to the radial direction of the optical portion of the intraocular lens disposed in the passage When,
An extrusion member for extruding the intraocular lens,
The intraocular lens is pushed to the distal end side by the push member while the optical unit is in contact with the first inner wall surface and the second inner wall surface,
The intraocular lens is pushed out to the distal end side by the pushing member in a state where the first support portion is located closer to the distal end side than the optical portion in the passage, and the first support portion is bent and the The magnitude of the first frictional force generated between the first inner wall surface and the optical part after the distal end portion of the first support part is disposed inside the outer peripheral part of the optical part and the second Controlling the circumferential direction of the optical part of the intraocular lens by changing the magnitude of the second frictional force generated between the inner wall surface and the optical part;
An intraocular lens insertion device. The intraocular lens insertion device according to any one of claims 1 to 6,
A rear passage formed behind the intraocular lens in the pushing direction of the intraocular lens;
A first inner wall surface formed on both sides in a direction perpendicular to the axial direction of the rear passage and parallel to the radial direction of the optical unit when the intraocular lens is disposed in the rear passage; A second rear inner wall surface,
When the intraocular lens is inserted into the eye, the intraocular lens is inserted into the passage side by the push-out member in a state where the first support portion is located closer to the distal end side than the optical portion in the rear passage. The first support part is bent inside the optical part by pushing the intraocular lens to the distal end side by the pushing member in the passage.
The first rear inner wall surface is formed at a position on a side where a root portion of the first support portion is disposed when the intraocular lens is disposed in the rear passage with respect to a central axis of the rear passage. Has been
A first contact portion is formed at a position closer to the central axis of the rear passage than the first rear inner wall surface,
The first contact portion is formed at a position in contact with an outer peripheral portion of the optical portion when the intraocular lens is pushed out;
An intraocular lens insertion device. An intraocular lens insertion device for inserting an intraocular lens comprising a disk-shaped optical unit and a first support unit extending outward from an outer peripheral portion of the optical unit,
A front passage gradually reducing the passage area toward the tip side,
A rear passage formed behind the front passage in the pushing direction of the intraocular lens;
A first inner wall surface formed on both sides of a direction parallel to the radial direction of the optical unit when the intraocular lens is disposed in the rear passage, and is orthogonal to the axial direction of the rear passage. 2 inner walls,
An extrusion member for extruding the intraocular lens,
When the intraocular lens is inserted into the eye, the intraocular lens is inserted into the front passage by the push-out member in a state where the first support portion is positioned closer to the distal end side than the optical portion in the rear passage. After pushing out to the side, the first support part is bent inside the optical part by pushing the intraocular lens to the tip side by the pushing member in the front passage,
The first inner wall surface is formed at a position on a side where a root portion of the first support portion is disposed when the intraocular lens is disposed in the rear passage with respect to a central axis of the rear passage. And
A first contact portion is formed at a position closer to the central axis of the rear passage than the first inner wall surface,
The first contact portion is formed at a position in contact with an outer peripheral portion of the optical portion when the intraocular lens is pushed out;
An intraocular lens insertion device. The intraocular lens insertion device of claim 8,
The distance between the first contact portion and the central axis of the rear passage is less than the radius of the optical portion;
An intraocular lens insertion device. The intraocular lens insertion device according to claim 8 or 9,
The first contact portion is formed at a tip portion of a protrusion protruding from the first inner wall surface toward the central axis of the rear passage;
An intraocular lens insertion device. The intraocular lens insertion device according to any one of claims 8 to 10,
The intraocular lens includes a second support portion that extends outward from an outer peripheral portion of the optical portion,
The first support part and the second support part are formed at point-symmetric positions with respect to the center of the optical part,
When inserting the intraocular lens into the eye, the intraocular lens is pushed to the front passage side in a state where the second support portion is bent inside the optical portion in the rear passage,
The second inner wall surface is formed at a position on a side where a root portion of the second support portion is disposed when the intraocular lens is disposed in the rear passage with respect to a central axis of the rear passage. And
A second contact portion is formed at a position closer to the central axis of the rear passage than the second inner wall surface;
The second contact portion is formed at a position in contact with the root portion of the second support portion after the outer peripheral portion of the optical portion is separated from the first contact portion when the intraocular lens is pushed out. about,
An intraocular lens insertion device. The intraocular lens insertion device of claim 11,
The second contact portion is formed at a position in contact with a root portion of the second support portion when the first support portion and the optical portion are disposed in the front passage when the intraocular lens is pushed out. That
An intraocular lens insertion device.

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