Artificial intraocular lens conductor

Abstract

An intraocular lens insertion tool for inserting an intraocular lens into the eye, said intraocular lens insertion tool comprising: an insertion tool body 5; an insertion tube 7 that is attached to a tip end section of the insertion tool body 5 and has a nozzle section 7b; and an attachment member 16 that has a protruding surface, said protruding surface being positioned protruding outward from an outer circumferential surface of the nozzle section 7b. The attachment member 16 has a sleeve section 16a and a fastening section 16b, and is structured so as to be movable with regard to the insertion tube 7.

Description

Intraocular lens insertor The present invention relates to an intraocular lens inserter used when inserting an intraocular lens into the inside of the eyeball (intraocular). In cataract surgery, the removal of the cloudy lens using phacoemulsification and subsequent implantation into the eye are widely performed. Currently, flexible intraocular lenses made of soft materials such as silicone elastomer are inserted into the eye using an intraocular lens inserter. Regarding intraocular lens implanters, for example, Patent Document 1 employs a configuration in which the implanter body is equipped with an insertion tube, and the insertion tube is equipped with a nozzle. In actual surgery, the nozzle of the insertion tube is inserted into the incision of the eyeball, and in this state, the rod of the intraocular lens implanter releases the intraocular lens from the nozzle. On the other hand, Patent Document 2 discloses a cartridge configuration for inserting an intraocular lens, in which a peripheral projection is formed on the outer surface of the nozzle portion. In this cartridge, when the nozzle portion is inserted into the incision of the eyeball, the peripheral projection comes into contact with the surface of the eyeball, thereby preventing the nozzle portion from being fully inserted into the incision. Japanese Patent Publication No. 2015-177845, Japanese Patent Publication No. 4685897 The technologies described in the aforementioned Patent Documents 1 and 2 each have different advantages. In other words, in the technology described in Patent Document 1, since no peripheral protrusions are formed on the outer surface of the nozzle, the nozzle can be inserted deeply into the incision of the eyeball. Furthermore, when the nozzle is inserted deeply into the incision of the eyeball, the intraocular lens can be guided into the lens capsule more reliably than when it is inserted shallowly. Therefore, it becomes possible to reduce the effort required to manipulate the intraocular lens inserted into the eye with an intraocular lens inserter to place it into the lens capsule using forceps or the like. In the technique described in Patent Document 2, since a peripheral protrusion is formed on the outer surface of the nozzle portion, the nozzle portion can be inserted shallowly into the incision of the eyeball. And when the nozzle is inserted shallowly into the incision of the eyeball, the intraocular lens can be inserted through a smaller incision than when inserted deeply. Therefore, it becomes possible to apply the Wound-assisted method, which reduces the size of the incision and improves the postoperative closure property. The Wound-assisted method is a surgical method that enables reduction of the size of the incision required for the passage of the intraocular lens by using the tunnel portion of the incision as the insertion path of the intraocular lens. As described above, the techniques described in Patent Documents 1 and 2 have different advantages. On the other hand, among the users (mainly surgeons such as ophthalmologists) who use an intraocular lens inserter when performing cataract surgery, there are users who prefer the technique of inserting the nozzle portion deeply into the incision of the eyeball and users who prefer the technique of inserting it shallowly. Therefore, in order to accommodate the preferences of each user's technique, it is necessary to prepare both an intraocular lens inserter having a nozzle portion with a peripheral protrusion or the like formed thereon and an intraocular lens inserter having a nozzle portion without a peripheral protrusion or the like formed thereon. A main object of the present invention is to provide an intraocular lens inserter that can flexibly cope with differences in the techniques of intraocular lens insertion surgery. (First Aspect) The first aspect of the present invention is an intraocular lens inserter for inserting an intraocular lens into the eye, comprising a hollow body having a nozzle portion, and an accessory member having a projecting surface disposed in a state of projecting outward from the outer peripheral surface of the nozzle portion, wherein the accessory member is configured to be movable with respect to the hollow body. This is the intraocular lens inserter. (Second Aspect) The second aspect of the present invention is the above-mentioned intraocular lens inserter according to the first aspect, wherein the accessory member is detachable from the hollow body. This is the intraocular lens inserter according to the first aspect. (Third Aspect) A third aspect of the present invention is: The aforementioned accessory member is movable in the axial direction of the hollow body. This is an intraocular lens insertor described in the first or second embodiment above. (Fourth aspect) A fourth aspect of the present invention is: The aforementioned accessory member is movable in the axial direction of the hollow body while remaining attached to the hollow body. This is an intraocular lens insertor described in the third aspect above. (Fifth aspect) A fifth aspect of the present invention is: The aforementioned accessory member has a fastening portion that fastens to the hollow body, The hollow body has a portion to be attached, corresponding to the attachment portion. This is an intraocular lens insertor described in any one of the first to fourth embodiments described above. (Sixth aspect) A sixth aspect of the present invention is: The engagement portion has a locking mechanism that temporarily fixes the attached member to the hollow body by engaging with the attached portion. This is the intraocular lens intubator described in the fifth aspect above. (Seventh aspect) A seventh aspect of the present invention is: The aforementioned engagement portion includes a tongue piece having a plurality of engagement holes, The engagement portion includes a locking claw that engages with one of the plurality of engagement holes. This is the intraocular lens intubator described in the fifth aspect above. (Eighth aspect) An eighth aspect of the present invention is: The aforementioned accessory member is configured such that the insertion amount of the nozzle portion when it is inserted into the incision of the eyeball can be limited by the protruding surface. This is an intraocular lens insulator as described in any one of the first to seventh embodiments described above. (The ninth aspect) A ninth aspect of the present invention is: A viewing window is provided in the aforementioned accessory member. This is an intraocular lens insulator as described in any one of the eight embodiments described above. (Tenth aspect) A tenth aspect of the present invention is: The aforementioned protruding surface is formed in a shape with the upper part cut out, The viewing window is formed to communicate with the notched portion of the protruding surface. This is an intraocular lens inserter as described in the ninth aspect above. (The 11th aspect) An eleventh aspect of the present invention is: The aforementioned protruding surface is formed of a flexible resin. This is an intraocular lens insertor described in any one of the first to tenth embodiments described above. (The twelfth aspect) A twelfth aspect of the present invention is: The nozzle portion has a notch formed along the axial direction of the hollow body. The aforementioned accessory member has a tapered portion that contacts the outer circumferential surface of the nozzle portion and the portion where the notch is formed, thereby reducing the outer diameter of the nozzle portion. This is an intraocular lens insertor described in any one of the first to eleventh embodiments described above. (The 13th aspect) A thirteenth aspect of the present invention is: The hollow body has a lens mounting portion, An intraocular lens is installed in the aforementioned lens mounting section. This is an intraocular lens insertor described in any one of the first to twelfth embodiments described above. According to the present invention, it is possible to flexibly accommodate differences in the technique of intraocular lens implantation surgery. This is a perspective view showing an example of the configuration of an intraocular lens insulator according to the first embodiment of the present invention. (A) is a plan view showing an example of the configuration of an intraocular lens insulator according to the first embodiment of the present invention, (B) is a side view, and (C) is a cross-sectional view taken along E1-E1 in (A). This is a perspective view showing the configuration of the insulator body. (A) is a side view showing the configuration of the insulator body, (B) is a cross-sectional view taken along F1-F1 in (A), and (C) is an enlarged view of part F2 in (B). (A) is a perspective view showing the insulator body with the rotation restricting part open, and (B) is a view taken along arrow G in (A). This is a perspective view showing the structure and arrangement of the tip portion of the insulator body. This shows the configuration of the insertion tube, with (A) being a plan view, (B) being a side view, and (C) being a bottom view. This is a cross-sectional view taken along H-H in Figure 7(B). This is a perspective view showing the configuration of an accessory member. This is a three-view drawing showing the configuration of an accessory member, with (A) being a plan view, (B) being a side view, and (C) being a rear view. Figure 2 shows the attached accessory member to the insertion tube, with (A) being a plan view, (B) a side view, and (C) a bottom view. Figures 2 and 3 show a preferred configuration example when the accessory member is used, with (A) being a cross-sectional view from the axial direction and (B) being a cross-sectional view from a direction perpendicular to the axial direction. Figures 2 and 3 show the procedures for attaching and detaching the accessory member. Figure 2 is an enlarged view of part E5. Figure 2 is a cross-sectional view taken from E2-E2. Figure 2 is a cross-sectional view taken from E3-E3 in Figure 2, and (B) is a cross-sectional view taken from E4-E4 in Figure 2. Figure 2 shows a diagram illustrating the function of the accessory member. Figure 3 shows an example of changing the protrusion amount of the nozzle member. Figure 4 shows a perspective view of the intraocular lens inserter according to the second embodiment of the present invention with the attached accessory member to the insertion tube. Figure 5 shows a perspective view of the configuration of the insertion tube according to the second embodiment of the present invention. Figure 6 shows a perspective view of the configuration of the accessory member according to the second embodiment of the present invention. Figure 7 shows the configuration of the accessory member according to the second embodiment of the present invention, with (A) being a plan view, (B) a side view, (C) a bottom view, and (D) a rear view. This shows the attached components in the insertion tube, with (A) being a plan view, (B) a side view, and (C) a bottom view. (A) is a cross-sectional view of J2-J2 in Figure 23, (B) is a cross-sectional view of J1-J1 in Figure 23, and (C) is an enlarged view of section K in (B).(A) is a side view showing the locking hole engaged with the rear engagement hole, (B) is a side view showing the locking hole engaged with the central engagement hole, and (C) is a side view showing the locking hole engaged with the front engagement hole. This is a perspective view showing the configuration of an intraocular lens inserter according to the third embodiment of the present invention. (A) is a plan view showing the configuration of an intraocular lens inserter according to the third embodiment of this embodiment, (B) is a side view, and (C) is a cross-sectional view taken along M-M in (A). This is a perspective view showing the configuration of the inserter body according to the third embodiment of the present invention, with (A) showing the rotation restricting part provided on the inserter body in an open state and (B) showing the rotation restricting part in a closed state. This shows the configuration of the insertion tube according to the third embodiment of the present invention, with (A) being a plan view, (B) being a side view, and (C) being a bottom view. (A) is a perspective view of the insertion tube according to the third embodiment of the present invention viewed from diagonally above, and (B) is a perspective view viewed from diagonally below. This is a perspective view of an accessory member according to the third embodiment of the present invention, viewed from diagonally above, where (A) shows the accessory member before attachment to the insertion cylinder and (B) shows the accessory member after attachment to the insertion cylinder. This shows the configuration of the accessory member according to the third embodiment of the present invention, where (A) is a plan view, (B) is a side view, and (C) is a bottom view. This is a view from arrow N in Figure 32(B). This is a longitudinal cross-sectional view of the accessory member according to the third embodiment of the present invention, showing the state in which the locking portion is closed. This is a perspective view (1) showing the attachment procedure of the accessory member according to the third embodiment of the present invention. This is a perspective view (2) showing the attachment procedure of the accessory member according to the third embodiment of the present invention. This is a longitudinal cross-sectional view showing the state in which the accessory member attached to the insertion cylinder is attached to the insertion cylinder in the third embodiment of the present invention. This is a longitudinal cross-sectional view showing the state in which the accessory member attached to the insertion cylinder is moved in the axial direction in the third embodiment of the present invention. (A) to (D) are diagrams illustrating the arrangement relationship between the plunger and the rotation restricting portion in the third embodiment of the present invention. Embodiments of the present invention will be described in detail below with reference to the drawings. <Configuration of an intraocular lens inserter> Figure 1 is a perspective view showing an example of the configuration of an intraocular lens inserter according to the first embodiment of the present invention. Figure 2(A) is a plan view showing an example of the configuration of an intraocular lens inserter according to the first embodiment of the present invention, (B) is a side view, and (C) is a cross-sectional view taken along E1-E1 in (A). The intraocular lens inserter 1 is used when inserting an intraocular lens into the eye. In this embodiment, as an example of an intraocular lens, we will handle a one-piece type intraocular lens 4 (see Figure 6) made of a flexible material such as silicone elastomer or flexible acrylic, which has a circular optical section 4a that performs optical functions and two support sections 4b that curve outward from two locations on the outer circumference of the optical section 4a. Furthermore, in this embodiment, when explaining the relative positional relationships and directions of movement of each part of the intraocular lens inserter 1, one direction in the X-axis direction is defined as direction X1 and the other as direction X2, one direction in the Y-axis direction is defined as direction Y1 and the other as direction Y2, one direction in the Z-axis direction is defined as direction Z1 and the other as direction Z2, direction X1 is defined as the front end side (forward), direction X2 is defined as the rear end side (backward), direction Y1 is defined as the left side (leftward), direction Y2 is defined as the right side (rightward), direction Z1 is defined as the upper side (upward), and direction Z2 is defined as the lower side (downward). Of these, the X-axis direction (directions X1 and X2) corresponds to the length direction of the intraocular lens inserter 1, the Y-axis direction (directions Y1 and Y2) corresponds to the width direction of the intraocular lens inserter 1, and the Z-axis direction (directions Z1 and Z2) corresponds to the height direction of the intraocular lens inserter 1. The intraocular lens inseminator 1 comprises an inseminator body 5, a slider 6, an insertion tube 7, a rotating member 8, a plunger 9, a rod 10 (see Figure 2(C)), and an accessory member 16. These components are preferably made of molded resin. The inseminator body 5 and the insertion tube 7 each have a hollow structure and are connected to each other to form a hollow body. The slider 6 is attached to the inseminator body 5. The insertion tube 7 is connected to the tip of the inseminator body 5. The rotating member 8 is rotatably connected to the rear end of the inseminator body 5. The plunger 9 is arranged coaxially with the inseminator body 5. Part of the plunger 9 is located inside the inseminator body 5 via the rotating member 8, while the other part of the plunger 9 protrudes rearward from the rotating member 8. The rod 10 is located inside the hollow body consisting of the inseminator body 5 and the insertion tube 7. The accessory member 16 is a member attached to the hollow body to provide a predetermined additional function. (Insertor body) Figure 3 is a perspective view showing the configuration of the inserter body. Figure 4(A) is a side view showing the configuration of the inserter body, (B) is a cross-sectional view of F1-F1 in (A), and (C) is an enlarged view of section F2 in (B). The intubator body 5 is formed in a cylindrical shape overall. A lens mounting section 11 is provided at the tip of the intubator body 5. The intraocular lens 4 is placed in this lens mounting section 11. The lens mounting section 11 is formed to protrude forward from the lower outer peripheral wall of the intubator body 5. An insertion tube connecting portion 5a is formed on the outer circumference of the tip side of the inserter body 5. Slits 12 are formed on both the left and right sides of the inserter body 5. The slits 12 are formed on the tip side of the inserter body 5. The slits 12 support the slider 6 so that it can move in the axial direction (central axis direction) of the inserter body 5 when the slider 6 is attached to the inserter body 5. The rear end of the inserter body 5 has a circular opening, through which the plunger 9 and rod 10 can be inserted into the interior of the inserter body 5. A rotation restricting portion 13, a flange portion 14, and a rotation support portion 15 are formed at the rear end of the inserter body 5 and in its vicinity. The rotation restricting portion 13 restricts the rotation of the plunger 9 that is inserted into the inserter body 5. Figures 4(A) to 4(C) above show the inserter body with the rotation restrictor closed. In contrast, Figure 5(A) is a perspective view of the inserter body with the rotation restrictor open, and (B) is a view taken along arrow G in (A). The rotation restricting portion 13 is formed slightly forward of the flange portion 14. The rotation restricting portion 13 constitutes a part of the outer wall of the inserter body 5 and is rotatably mounted around the pivot portion 13a so as to be able to open and close an opening formed in the outer wall. A pair of sliding guides 13b are formed on the rotation restricting portion 13, and a concave guide groove 13c is formed between these sliding guides 13b. The pair of sliding guides 13b are positioned inside the cylinder of the inserter body 5 when the rotation restricting portion 13 is closed, and outside the cylinder of the inserter body 5 when the rotation restricting portion 13 is open. The closed state of the rotation restricting portion 13 is maintained by, for example, the fitting of protrusions and indentations (not shown). When the rotation restricting portion 13 is rotated around the pivot portion 13a against the holding force of the fitting of these protrusions and indentations, the rotation restricting portion 13 opens, as shown in Figure 5. The tip surface of each sliding guide 13b is a retaining portion 13d (see Figure 4(C)). The retaining portion 13d prevents the plunger 9 from coming out of the inserter body 5. The flange portion 14 is a part for the user to hook their fingers (usually the index and middle fingers) onto when operating the intraocular lens inserter 1 using a push mechanism. The rotation support portion 15 is located slightly behind the flange portion 14. The rotation support portion 15 is formed in a ring shape with a stepped structure that protrudes in a ring shape. As shown in Figure 6, the lens mounting section 11 comprises a bottom surface 11a, a lens receiving section 11b, and a lens guide section 11c. The lens receiving section 11b supports the intraocular lens 4 from below. The intraocular lens 4 is installed in the lens mounting section 11 with one support section 4b positioned forward and the other support section 4b positioned backward. The intraocular lens inserter 1 is a pre-loaded type in which the intraocular lens 4 is pre-installed in the lens mounting section 11 of the inserter body 5. Therefore, the intraocular lens 4 is one of the components of the intraocular lens inserter 1. However, it is not necessarily required to be a pre-loaded type when implementing the present invention. The central portion in the width direction of the bottom surface portion 11a is formed to be slightly recessed. The lens receiving portions 11b are formed on both the left and right sides of the lens installation portion 11. The lens receiving portions 11b are formed to be one step higher than the bottom surface portion 11a. This is for supporting the intraocular lens 4 placed on the lens receiving portions 11b in a state floating from the bottom surface portion 11a without contacting the optical portion 4a of the intraocular lens 4 with the bottom surface portion 11a. The lens guide portions 11c are formed on both the left and right sides of the lens installation portion 11, similar to the lens receiving portions 11b. The lens guide portions 11c guide the optical portion 4a of the intraocular lens 4 supported by the lens receiving portions 11b so as to sandwich it from both the left and right sides. The lens guide portions 11c are formed in a state of standing upright vertically from the lens receiving portions 11b. At the upper end portions of the left and right lens guide portions 11c, an inclined surface 11d and a regulating portion 11e are formed adjacent to the axial direction of the inserter main body 5. The inclined surface 11d is formed to be inclined outward so as to facilitate receiving the intraocular lens 4 into the lens installation portion 11. The inclined surface 11d is formed on the tip side of the lens installation portion 11 rather than the regulating portion 11e in the axial direction of the inserter main body 5. The regulating portion 11e is formed in a state of protruding toward the center side in the width direction of the lens installation portion 11. The regulating portion 11e limits the vertical movement range of the intraocular lens 4 supported by the lens receiving portions 11b. (Slider) As shown in FIGS. 1, 2, and 6, the slider 6 has a configuration including a lens pressing portion 6a and a pair of wing portions 6b. The lens pressing portion 6a is disposed at the tip end portion of the slider 6, and the pair of wing portions 6b are disposed in pairs on the left and right of the slider 6. When the slider 6 is moved forward, as shown in FIG. 6, the lens pressing portion 6a advances and is disposed above the optical portion 4a of the intraocular lens 4 installed in the lens installation portion 11. The pair of wings 6b are arranged outside the outer wall portion of the inserter body 5. When using the intraocular lens inserter 1, the pair of wings 6b serve as the portions where the user's fingers (usually the index finger and the thumb) are placed when moving the slider 6 in the axial direction of the inserter body 5. The user refers to the surgeon such as an ophthalmologist performing the surgery or a nurse assisting the surgeon. On the outer surface of each wing 6b, irregularities for anti-slip and marks (triangular arrows in this exemplary embodiment) indicating the moving direction of the slider 6 are formed. Further, the outer surface of each wing 6b is curved from the rear end side toward the front end side so that the user's finger can easily catch, and irregularities for anti-slip are formed on this curved portion. (Insertion tube) FIG. 7 shows the configuration of the insertion tube, where (A) is a plan view, (B) is a side view, and (C) is a bottom view. FIG. 8 is a cross-sectional view taken along the line H-H in FIG. 7(B). The insertion tube 7 is for folding the intraocular lens 4 installed in the lens installation portion 11 and guiding it into the eye when inserting the intraocular lens 4 into the eye. The insertion tube 7 is formed of a transparent or translucent material so that the state of the intraocular lens 4 moving inside the insertion tube 7 can be visually recognized from the outside. The insertion tube 7 has a hollow insertion tube body 7a and a thin tubular nozzle portion 7b. The insertion tube 7 is attached to the tip of the inserter body 5. At that time, the lens installation portion 11 of the inserter body 5 is accommodated and arranged together with the intraocular lens 4 installed therein in the insertion tube body 7a of the insertion tube 7. An injection hole 7c is formed on the upper surface of the insertion tube body 7a. The injection hole 7c is for injecting a viscoelastic substance (for example, sodium hyaluronate, etc.). The viscoelastic substance injected from the injection hole 7c is supplied to the intraocular lens 4 installed in the lens installation portion 11. On the other hand, the rear end of the insertion tube body 7a is open, and a hook portion 7d and a wedge portion 7e are formed around this opening. The hook portions 7d are arranged in pairs vertically, and the wedge portions 7e are arranged in pairs horizontally. The hook portions 7d are the parts that hook onto the insertion tube connecting portion 5a of the inserter body 5 when the insertion tube 7 is attached to the tip of the inserter body 5. The wedge portions 7e are the parts that are inserted into the entrance portion of the slit 12 of the inserter body 5 when the insertion tube 7 is attached to the inserter body 5. The insertion tube body 7a is divided into a first portion 7f and a second portion 7g in the axial direction of the insertion tube 7. The first portion 7f has an internal space capable of accommodating the lens mounting portion 11 of the inserter body 5 and is wider than the second portion 7g. The second portion 7g is located forward of the first portion 7f. The internal space of the inserter body 7a gradually narrows from the first portion 7f to the second portion 7g in order to fold the intraocular lens 4 into a smaller size when the rod 10 pushes it out. The second portion 7g of the insertion tube body 7a has a first projection 7h, a second projection 7i, and a third projection 7j. These three projections 7h, 7i, and 7j are formed in accordance with the attachment portion 16b, which will be described later, in order to attach the accessory member 16 to the insertion tube 7, and constitute the attachment portion. The first projection 7h is formed to protrude from one (left) side of the second portion 7g. The second projection 7i is formed adjacent to the rear of the first projection 7h. The second projection 7i protrudes from one (left) side of the second projection 7i with a smaller projection amount than the first projection 7h. The third projection 7j is formed to protrude downward from the bottom surface of the second portion 7g. The third projection 7j is formed to be positioned rearward from the first projection 7h. The nozzle portion 7b is the part that is inserted into the incision of the eyeball when inserting the intraocular lens 4 into the eye using the intraocular lens inserter 1. The nozzle portion 7b is formed at the tip of the insertion tube 7. The nozzle portion 7b is formed to protrude forward from the tip of the second portion 7g of the insertion tube body 7a. The nozzle portion 7b is formed in a substantially circular shape when viewed from the axial direction of the insertion tube 7. The outer diameter of the nozzle portion 7b is substantially uniform over the entire length Ln of the nozzle portion 7b. The tip of the nozzle portion 7b opens with an oblique cut from top to bottom, and the intraocular lens 4 is released to the outside through this opening. A notch 7k is formed at the lower opening edge of the nozzle portion 7b. The notch 7k is formed along the axial direction of the insertion tube 7. Preferably, the notch 7k is formed in a V shape as shown in the figure. (Accessories) Figure 9 is a perspective view showing the configuration of the accessory component. Figure 10 is a three-view drawing showing the configuration of the accessory component, where (A) is a top view, (B) is a side view, and (C) is a rear view. As an example of the additional functions described above, the attached member 16 is a member that provides a function to limit the insertion amount of the nozzle portion 7b when inserting the nozzle portion 7b into the incision of the eyeball (hereinafter also referred to as the "nozzle insertion amount limiting function"). The nozzle insertion amount limiting function is realized by utilizing the tip surface 16d of the sleeve portion 16a of the attached member 16 (details will be described later). The accessory member 16 is a separate component from the insertion cylinder 7 and is configured to be movable relative to the insertion cylinder 7. There are no particular restrictions on the direction or form of movement of the accessory member 16 relative to the insertion cylinder 7. For example, regarding the direction of movement, possible movements include movement in the axial direction of the insertion cylinder 7, movement in a direction intersecting (including perpendicular to) the axial direction of the insertion cylinder 7, movement around the axis of the insertion cylinder 7, and movement around the axis intersecting (including perpendicular to) the axial direction of the insertion cylinder 7. Regarding the form of movement, possible movements include linear movement, rotational movement, twisting movement, opening / closing (oscillating) movement, and extension / contraction movement. In this embodiment, the accessory member 16 is configured to be detachable from the insertion cylinder 7 by the movement of the accessory member 16 relative to the insertion cylinder 7. Here, "detachable" means "it is possible to attach the accessory member 16 to the insertion cylinder 7 or to remove the accessory member 16 from the insertion cylinder 7." In the intraocular lens implanter 1 of this embodiment, the accessory member 16 may be provided attached to the insertion tube 7 or detached from the insertion tube 7. In either case, the accessory member 16 is one of the elements constituting the intraocular lens implanter 1. Furthermore, when the nozzle insertion amount limiting function provided by the accessory member 16 is used, the accessory member 16 is attached to the insertion tube 7. When this function is not used, the accessory member 16 is detached from the insertion tube 7. However, even in the latter case, i.e., when the accessory member 16 is not used in intraocular lens implantation surgery, the accessory member 16 remains one of the elements constituting the intraocular lens implanter 1. The accessory member 16 comprises a sleeve portion 16a and a locking portion 16b. The sleeve portion 16a has a through hole 16c into which the nozzle portion 7b of the insertion cylinder 7 can be fitted. The through hole 16c is formed to penetrate the sleeve portion 16a in the axial direction. The tip surface 16d of the sleeve portion 16a is formed to be inclined at an angle with respect to the central axis of the sleeve portion 16a. When the accessory member 16 is attached to the insertion cylinder 7, the tip surface 16d of the sleeve portion 16a is positioned to protrude outward (in the direction of increasing diameter) from the outer circumferential surface of the nozzle portion 7b. Thus, the tip surface 16d of the sleeve portion 16a corresponds to the "protruding surface". However, the shape of the protruding surface is not limited to a continuous annular plane in the circumferential direction, such as the tip surface 16d of the sleeve portion 16a, but may be formed in any shape as long as it provides a nozzle insertion amount limiting function. For example, the protruding surface may be arranged discontinuously in the circumferential direction by dividing it into at least one location, preferably two locations at 180-degree intervals, or three or more locations. The protruding surface may also be a curved surface. The engagement portion 16b is the part that engages with the insertion tube 7 when the accessory member 16 is attached to the insertion tube 7. The engagement portion 16b is configured to be able to engage with the insertion tube 7 and to be able to release the engagement in order to make the accessory member 16 detachable from the insertion tube 7. The engagement portion 16b has a structure in which the outer wall of the insertion tube body 7a (second portion 7g) of the insertion tube 7 is partially cut out in a roughly trapezoidal cone shape. The engagement portion 16b has a hook portion 16e, a stopper portion 16f, and a viewing window 16g formed therein. Of these, the hook portion 16e and the stopper portion 16f constitute a locking mechanism for positioning and temporarily fixing the accessory member 16 on the insertion tube 7. The hook portion 16e is the part that hooks onto the first projection 7h of the insertion tube 7. A semicircular recessed portion 16h is formed on the inner circumference side of the hook portion 16e. The recessed portion 16h is configured to be able to engage with and disengage from the insertion tube 7 in the axial direction of the insertion tube 7 from the second projection 7i of the insertion tube 7. "Axial direction" means the direction of rotation around the central axis of a certain member. The stopper portion 16f is configured to be able to abut against the first projection 7h of the insertion tube 7 in the axial direction of the insertion tube 7, and to abut against the third projection 7j of the insertion tube 7 in the axial direction of the insertion tube 7. The viewing window 16g is formed by cutting out the upper part of the engaging portion 16b in a roughly V-shape in plan view. The viewing window 16g is formed so that the state of the intraocular lens 4 moving inside the insertion tube 7 can be seen from the outside even when the accessory member 16 is attached to the insertion tube 7. The material of the accessory member 16 is not particularly limited, for example, metal, ceramic, resin, etc., but a transparent or translucent material is preferred so that the state of the intraocular lens moving inside the insertion tube 7 can be seen from the outside. Furthermore, the protruding surface of the attached member 16 comes into direct contact with the cornea when the intraocular lens is inserted into the eye, and this places a load on the cornea. Therefore, in order to reduce this load, it is preferable that it be made of a soft resin such as silicone or urethane. Figure 11 shows the attached components in the insertion tube, with (A) being a top view, (B) a side view, and (C) a bottom view. As shown in the figure, when the accessory member 16 is attached to the insertion tube 7, the nozzle portion 7b is fitted into the through hole 16c of the sleeve portion 16a. At this time, the tip surface 16d of the sleeve portion 16a is positioned to protrude outward from the outer peripheral surface of the nozzle portion 7b, and is also positioned to be inclined in the same direction as the cut surface of the nozzle portion 7b with respect to the axial direction of the insertion tube 7. In this case, the inner diameter of the through hole 16c of the sleeve portion 16a may be set to be the same as or slightly larger than the outer diameter of the nozzle portion 7b along the entire axial length of the sleeve portion 16a, so as not to deform the shape of the nozzle portion 7b that is fitted therein. Another preferred embodiment is to form a tapered portion 16i in a part of the through hole 16c of the sleeve portion 16a, as shown in Figures 12(A) and (B). The tapered portion 16i is formed such that the diameter of the through hole 16c gradually decreases toward the tip of the sleeve portion 16a at the tip side of the sleeve portion 16a. The minimum diameter of the through hole 16c in the tapered portion 16i is set to be smaller than the outer diameter of the nozzle portion 7b. As a result, when the accessory member 16 is attached to the insertion cylinder 7, the tapered portion 16i contacts the outer surface of the nozzle portion 7b and the portion where the notch 7k is formed. Therefore, at the tip of the sleeve portion 16a, the outer diameter of the sleeve portion 16a is reduced by contact with the tapered portion 16i. On the other hand, the hook portion 16e of the engagement portion 16b is hooked onto the first projection 7h. At this time, the recessed portion 16h is fitted into the second projection 7i (see Figure 12(A)). Also, the stopper portion 16f of the engagement portion 16b is in close proximity to or in contact with the third projection 7j of the insertion cylinder 7. At this time, the positioning of the attached member 16 with respect to the insertion cylinder 7 is done as follows. That is, in the axial direction of the insertion cylinder 7, the position of the attached member 16 is determined by the recessed portion 16h fitting into the second projection 7i of the insertion cylinder 7 and the hook portion 16e being hooked onto the first projection 7h of the insertion cylinder 7. Also, in the axial direction of the insertion cylinder 7, the position of the attached member 16 is determined by the stopper portion 16f abutting against the third projection 7j. To remove the attachment member 16 from the insertion tube 7, the attachment member 16 is released from the insertion tube 7 by first rotating the attachment member 16 around the axis of the insertion tube 7, and then moving the attachment member 16 in the axial direction of the insertion tube 7. Specifically, as shown in Figure 13(A), the attachment member 16 is first rotated in the direction of the arrow, so that, as shown in Figure 13(B), the stopper portion 16f of the attachment portion 16b comes into contact with or close to the first projection 7h of the insertion tube body 7a. This causes the hook portion 16e of the attachment portion 16b to detach from the first projection 7h of the insertion tube 7, and the recessed portion 16h (see Figures 10 and 12) inside the hook portion 16e to detach from the second projection 7i. Next, as shown in Figure 13(C), the attachment member 16 is pulled out in the direction of the arrow along the axial direction of the insertion tube 7. This allows the attachment member 16 to be removed from the insertion tube 7. On the other hand, when attaching the accessory member 16 to the insertion tube 7, the procedure is the reverse of the above, that is, the accessory member 16 is moved in the axial direction of the insertion tube 7, and then rotated in the direction of the axis of the insertion tube 7 to engage the accessory member 16 with the insertion tube 7. Specifically, in Figure 13(C), the accessory member 16 is fitted into the insertion tube 7 from the direction opposite to the arrow, so that the stopper portion 16f of the engaging portion 16b comes into contact with or is close to the third projection 7j of the insertion tube 7, as shown in Figure 13(B). Next, by rotating the accessory member 16 in the opposite direction to when it was removed, the hook portion 16e of the engaging portion 16b is hooked onto the first projection 7h of the insertion tube 7, and the recessed portion 16h is fitted onto the second projection 7i. This allows the accessory member 16 to be attached to the insertion tube 7. Thus, with the attachment member 16 attached to the insertion cylinder 7, the movement of the attachment member 16 in the axial direction of the insertion cylinder 7 is restricted by the engagement (contact) between the first projection 7h and the hook portion 16e, and the engagement (contact) between the third projection 7j and the stopper portion 16f. For this reason, the attachment member 16 cannot be moved in the axial direction of the insertion cylinder 7. In other words, the position of the attachment member 16 is fixed in the axial direction of the insertion cylinder 7. Furthermore, the engagement between the locking portion 16b of the attachment member 16 and the locking portions (7h, 7i, 7j) of the insertion cylinder 7 cannot be released unless the attachment member 16 attached to the insertion cylinder 7 is rotated in the axial direction of the insertion cylinder 7, as the attachment member 16 cannot be moved in the axial direction of the insertion cylinder 7 as described above. (Rotating member) As shown in Figure 14, the rotating member 8 is attached to the rear end of the inserter body 5. In this attached state, the rotating member 8 is positioned coaxially with the inserter body 5 and is supported to rotate freely in the direction of the inserter body 5's axis. The rotating member 8 is formed in a cylindrical shape. The front and rear ends of the rotating member 8 are each open in a circular shape. As shown in Figures 1 and 2, a plurality of protrusions 8a are formed on the outer circumferential surface of the rotating member 8. Each protrusion 8a is formed parallel to the axial direction of the rotating member 8. The rotating member 8 is the part that is rotated by the user when the intraocular lens inserter 1 is used in a screw-type manner. At that time, if a plurality of protrusions 8a are formed on the outer circumferential surface of the rotating member 8, the user's fingers can catch on the protrusions 8a, making it easier to rotate the rotating member 8. A first threaded portion 8b is formed on the inner circumferential surface of the rotating member 8. The first threaded portion 8b is formed at a predetermined pitch. Two windows 8c are formed at the tip of the rotating member 8. The two windows 8c are spaced 180 degrees apart in the circumferential direction. These windows 8c are for visually confirming whether the inserter body 5 and the rotating member 8 are correctly connected. A pair of hooking claws 8d are formed on the inner circumferential surface of the tip of the rotating member 8. The pair of hooking claws 8d are used to hook onto the rotation support portion 15 of the inserter body 5 when connecting the rotating member 8 to the rear end of the inserter body 5. Each hooking claw 8d is formed adjacent to the windows 8c and near the opening on the tip side of the rotating member 8. The rotating member 8 is supported so as to be rotatable in the axial direction of the inserter body 5 with the pair of hooking claws 8d hooked onto the rotation support portion 15. Furthermore, the pair of hooking claws 8d are fitted between the flange portion 14 and the rotation support portion 15 of the inserter body 5. Therefore, the rotating member 8 is rotatable in the direction of the inserter body 5's axis, but does not move in the axial direction of the inserter body 5. (Plunger) The plunger 9 is positioned coaxially with the inserter body 5. The plunger 9 is provided to be movable in the axial direction of the inserter body 5. The plunger 9 has a rod-shaped plunger shaft 9a. The tip of the plunger 9 is a seal material mounting portion 9b, as shown in Figure 15. Figure 15 is a cross-sectional view taken along E2-E2 in Figure 2. The seal material mounting portion 9b consists of two disc portions having an outer diameter slightly smaller than the inner diameter of the inserter body 5, and a seal material 17 is mounted between these two disc portions. For example, an O-ring can be used as the seal material 17. When the plunger 9 is moved axially (forward) by the inserter body 5, the seal material 17 comes into contact with the inner circumferential surface of the inserter body 5, generating appropriate sliding resistance. The vertical cross-sectional shape of the plunger shaft 9a is approximately cross-shaped, as shown in Figures 16(A) and (B). Figure 16(A) is a cross-sectional view taken along E3-E3 in Figure 2, and Figure 16(B) is a cross-sectional view taken along E4-E4 in Figure 2. As shown in Figures 1 and 2 above, a second threaded portion 9c is formed on the upper and lower surfaces of the plunger shaft 9a, respectively. The second threaded portion 9c is formed in correspondence with the first threaded portion 8b of the rotating member 8. For this reason, the second threaded portion 9c is formed with the same pitch as the first threaded portion 8b. The second threaded portion 9c is always held in a state of engagement with the first threaded portion 8b of the rotating member 8. Therefore, when the rotating member 8 is rotated, the plunger 9 moves in the axial direction of the inserter body 5 according to the direction and amount of rotation. The plunger 9 is the part that is pushed in by the user when the intraocular lens inserter 1 is used in a push-type operation. Here, the second threaded portion 9c of the plunger 9 and the corresponding first threaded portion 8b of the rotating member 8 engage in a thread-groove relationship, and at the engaging portion, the first threaded portion 8b and the second threaded portion 9c are inclined at a predetermined taper angle with respect to the Z-axis (vertical direction in the figure), as shown in Figure 14. By adjusting (setting) the taper angles of these threaded portions 8b and 9c to an appropriate angle, it becomes possible to rotate the rotating member 8 with almost no resistance when pushing in the plunger 9. In particular, it is preferable that the rear taper angle θ of the second threaded portion 9c that contacts the first threaded portion 8b of the rotating member 8 when the plunger 9 is pushed in is between 5° and 15°, because when the plunger 9 moves forward due to the pushing operation, the threaded portions 8b and 9c do not catch on each other, allowing the rotating member 8 to rotate freely. Furthermore, in order to efficiently apply the load necessary to move the plunger 9 forward by the pushing operation to the rotating member 8, it is desirable to set the groove width (dimension in the Y-axis direction) of the screw portion 9c of the plunger 9 to 1.0 mm or more and 4.0 mm or less. In addition, it is desirable to adjust the screw pitch according to the set release load of the intraocular lens. The tip of the plunger 9, including the seal material attachment portion 9b, is inserted and positioned inside the inserter body 5, while the rear end of the plunger 9 is positioned to protrude behind the rotating member 8. In the initial state before use, the protrusion dimension Lp of the plunger 9 (see Figure 2(B)) relative to the rear end position of the rotating member 8 is set to be greater than or equal to the movement dimension of the rod 10 required to push out the intraocular lens 4 from the tip of the insertion tube 7. Here, the initial state before use refers to the state before the operation to push out the intraocular lens 4 with the rod 10 is performed when using the intraocular lens inserter 1. In this embodiment, the rod 10 can be moved forward by either the rotation operation of the rotating member 8 or the pushing operation of the plunger 9. Therefore, in the initial state before use, neither the rotation operation of the rotating member 8 nor the pushing operation of the plunger 9 has been performed. In its initial state before use, the plunger 9 is positioned with its shaft 9a protruding to approximately its maximum extent Lp, or close to it. In this state, the seal material mounting portion 9b of the plunger 9 is positioned close to or in contact with the rotation restricting portion 13 of the inserter body 5. At this time, the seal material mounting portion 9b of the plunger 9 faces the retaining portion 13d of the rotation restricting portion 13. Therefore, if the plunger 9 is moved backward from its initial state before use, the seal material mounting portion 9b will abut against the retaining portion 13d. This prevents the plunger 9 from coming out of the inserter body 5. Furthermore, when inserting the tip of the plunger 9 into the inserter body 5 together with the rod 10, the rotation restricting part 13 is opened as shown in Figure 5. This allows the tip of the plunger 9 to be inserted into the inserter body 5 with the sealing material 17 attached, avoiding interference with the rotation restricting part 13. When the rotation restricting part 13 is closed from this state to fit onto the plunger shaft 9a of the plunger 9, a part of the plunger shaft 9a (the part where the second threaded portion 9c is formed) fits into the guide groove 13c of the sliding guide 13b, as shown in Figures 16(A) and (B). At this time, the two opposing surfaces of the guide groove 13c are arranged to support a part of the plunger shaft 9a by sandwiching it from both sides, as shown in Figure 16(B). As a result, the plunger 9 is supported so as to be movable in the axial direction of the inserter body 5. However, the rotation of the plunger 9 in the direction of the axis of the inserter body 5 is restricted by the rotation restricting part 13. (rod) The rod 10 pushes the intraocular lens 4, which is installed in the lens mounting section 11, forward, thereby releasing the intraocular lens 4 from the tip of the insertion tube 7 (the opening of the nozzle section 7b). The rod 10 is formed in the shape of a long, slender rod. The rod 10 is connected to the tip of the plunger 9 and moves integrally with the plunger 9 in the axial direction of the hollow body. <How to use an intraocular lens inserter> Next, we will explain how to use the intraocular lens insertor 1. First, the user injects a viscoelastic substance into the injection hole 7c of the insertion tube 7. This supplies the viscoelastic substance to the intraocular lens 4 installed in the lens mounting section 11 of the intubator body 5. Next, the user moves the slider 6 forward. This causes the lens contact portion (not shown) formed at the tip of the slider 6 to come into contact with the intraocular lens 4, and the intraocular lens 4 is then pushed out. As a result, the intraocular lens 4 is deformed into a predetermined shape. By deforming the intraocular lens 4 in this way by moving the slider 6, it becomes easier to fold the intraocular lens 4 into the desired shape when the rod 10 pushes out the intraocular lens 4 in subsequent operations. Next, the user operates the intraocular lens inserter 1 using a push or screw mechanism to move the rod 10 forward together with the plunger 9, thereby releasing the intraocular lens 4 from the nozzle portion 7b of the insertion tube 7. At this time, the rod 10 comes into contact with the intraocular lens 4 as it moves forward, and pushes the intraocular lens 4 out. As a result, the intraocular lens 4 moves inside the insertion tube 7 while folding into a predetermined shape and is released from the opening at the tip of the nozzle portion 7b. Therefore, by releasing the intraocular lens 4 with the nozzle portion 7b of the insertion tube 7 inserted into the incision in the eyeball, the intraocular lens 4 can be inserted into the eye in a compactly folded state. Furthermore, after intraocular insertion, the intraocular lens 4 can be restored to its original shape by its own restorative force. <Effects of the First Embodiment> Next, the effects of the intraocular lens inserter 1 according to the first embodiment of the present invention will be described. The intraocular lens inserter 1 of this embodiment can accommodate two different operating methods, namely the screw method and the push method. The screw method is a method in which the intraocular lens 4 is pushed out by the rotation of the rotating member 8, and the push method is a method in which the intraocular lens 4 is pushed out by the pushing operation of the plunger 9. Therefore, when using the intraocular lens inserter 1, users who prefer the screw method can push out the intraocular lens 4 by the rotation of the rotating member 8, and users who prefer the push method can push out the intraocular lens 4 by the pushing operation of the plunger 9. The following describes each operating method. (Screw type) When using the intraocular lens inserter 1 with a screw mechanism, the user rotates the rotating member 8. Specifically, the user supports the inserter body 5 with one hand and rotates the rotating member 8 with the other. At this time, including the initial state before use, the first screw portion 8b of the rotating member 8 and the second screw portion 9c of the plunger 9 are always kept engaged. Therefore, when the rotating member 8 is rotated in a predetermined direction (clockwise when viewed from the rear end of the intraocular lens inserter 1), the plunger 9 moves forward in accordance with the rotation of the rotating member 8, and the rod 10 also moves forward with it. Furthermore, since the rotation of the plunger 9 in the axial direction of the inserter body 5 is restricted by the rotation restricting part 13, the plunger 9 and the rod 10 move forward without rotating in the axial direction of the inserter body 5. As a result, the intraocular lens 4 installed in the lens mounting portion 11 of the inserter body 5 is pushed out from the tip of the nozzle portion 7b by the movement of the rod 10. (Push type) When using the intraocular lens inseminator 1 in a push-type manner, the user pushes in the plunger 9. Specifically, the user hooks their index and middle fingers onto the flange portion 14 of the inseminator body 5 and presses their thumb against the rear end of the plunger 9. Then, in this position, they push the plunger 9 forward. When this is done, the pushing force applied to the plunger 9 is converted into a rotational force on the rotating member 8 through the engagement of the first screw portion 8b and the second screw portion 9c. As a result, when the plunger 9 is pushed forward, the plunger 9 moves forward together with the rod 10, and the rotating member 8 rotates in accordance with the movement of the plunger 9. Furthermore, since the rotation of the plunger 9 in the axial direction of the inseminator body 5 is restricted by the rotation restricting portion 13, the plunger 9 and the rod 10 move forward without rotating in the axial direction of the inseminator body 5. As a result, the intraocular lens 4 installed in the lens mounting portion 11 of the inseminator body 5 is pushed out from the tip of the nozzle portion 7b by the movement of the rod 10. As described above, the intraocular lens inserter 1 of this embodiment is compatible with both screw-type and push-type operating methods. Therefore, users of the intraocular lens inserter 1 can choose either operating method according to their preference or for other reasons or circumstances. This makes it possible to flexibly accommodate differences in intraocular lens insertion techniques with a single intraocular lens inserter 1. It also accommodates both users who prefer the screw-type and users who prefer the push-type. Furthermore, since the first screw portion 8b of the rotating member 8 and the second screw portion 9c of the plunger 9 are always engaged, including in the initial state before use, when operating with the screw-type method, the intraocular lens 4 can be pushed out by rotating only the rotating member 8. When operating with the push-type method, the first screw portion 8b and the second screw portion 9c are kept engaged from the start to the end of the operation, so vibrations and other issues are less likely to occur during the pushing operation of the plunger 9. (Nozzle insertion depth limiting function for attached components) The intraocular lens inseminator 1 of this embodiment can utilize or avoid the nozzle insertion depth limiting function provided by the attached member 16. Specifically, the attached member 16 is configured to be movable relative to the insertion tube 7, thereby making the attached member 16 detachable from the insertion tube 7. Therefore, when the attached member 16 is attached to the insertion tube 7, the nozzle insertion depth limiting function can be utilized, and when the attached member 16 is removed from the insertion tube 7, the use of the nozzle insertion depth limiting function can be avoided. The following will explain the cases in which the nozzle insertion depth limiting function is used and in which it is not used separately. (When using the nozzle insertion depth limiting function) When using the nozzle insertion depth limiting function provided by the accessory member 16, the accessory member 16 is attached to the insertion tube 7. This causes the nozzle portion 7b of the insertion tube 7 to be partially covered by the sleeve portion 16a of the accessory member 16. The nozzle insertion depth limiting function is activated during cataract surgery, as shown in Figure 17, when an incision 50a is made in the peripheral part of the cornea 50 of the eyeball and the nozzle portion 7b of the insertion tube 7 is inserted into this incision 50a, by the tip surface 16d of the sleeve portion 16a coming into contact with the outer surface 50b of the cornea 50. At that time, the tip surface 16d of the sleeve portion 16a comes into contact with the outer surface 50b of the cornea 50 and acts as a stopper to prevent further insertion of the nozzle portion 7b, thereby limiting the insertion amount of the nozzle portion 7b. When applying the wound-assisted method, it is desirable to set the relative positions of the insertion tube 7 and the attached member 16 such that the maximum protrusion amount L1 of the nozzle portion 7b, relative to the tip surface 16d of the sleeve portion 16a, is 1.0 mm or more and 1.2 mm or less. This makes it possible to limit the insertion amount of the nozzle portion 7b into the incision 50a of the cornea 50 to the equivalent of the above protrusion amount L1. Therefore, the intraocular lens 4 can be released from the tip of the nozzle portion 7b while the nozzle portion 7b is shallowly inserted into the incision 50a of the cornea 50. Furthermore, in order to utilize the nozzle insertion amount limiting function, when the attached member 16 is attached to the insertion tube 7, the movement of the attached member 16 in the axial direction of the insertion tube 7 is restricted by the engagement of the first projection 7h and the hook portion 16e, and the engagement of the third projection 7j and the stopper portion 16f. Therefore, after the intraocular lens 4 is released from the tip of the nozzle portion 7b, the nozzle portion 7b can be withdrawn from the incision 50a of the cornea 50, and at the same time, the tip surface 16d of the attached member 16 can be separated from the outer surface 50b of the cornea 50. Furthermore, when using the nozzle insertion amount limiting function, the insertion tube 7 and the attached member 16 are used in a state where they are combined as a single unit, as described above. Therefore, the engagement portion 16b of the attached member 16 and the engagement portions (7h, 7i, 7j) of the insertion tube 7 are always maintained in an engaged state, and the engaged state is never released. (If the nozzle insertion depth limiting function is not used) On the other hand, if the nozzle insertion depth limiting function provided by the accessory member 16 is not used, the accessory member 16 is removed from the insertion tube 7. As a result, the nozzle portion 7b of the insertion tube 7 is not covered by the sleeve portion 16a of the accessory member 16, and the entire nozzle portion 7b is exposed to the outside. Therefore, when inserting the nozzle portion 7b of the insertion tube 7 into the incision 50a of the cornea 50, the nozzle portion 7b can be inserted deeper than when the nozzle insertion depth limiting function described above is used. Consequently, the intraocular lens 4 can be released from the tip of the nozzle portion 7b while the nozzle portion 7b is deeply inserted into the incision 50a of the cornea 50. Thus, the intraocular lens inseminator 1 of this embodiment can utilize the nozzle insertion depth limiting function by attaching the accessory member 16 to the insertion tube 7, and it can also avoid using the nozzle insertion depth limiting function by removing the accessory member 16 from the insertion tube 7. Therefore, users of the intraocular lens inseminator 1 can use or avoid using the nozzle insertion depth limiting function according to their preference, or for other reasons or circumstances. This makes it possible to flexibly accommodate the preferences of each user, even if some users prefer a technique of deeply inserting the nozzle portion 7b into the incision 50a of the eyeball, while others prefer a technique of shallow insertion. Furthermore, by providing multiple accessory members 16 of different sizes (especially length) of the sleeve portion 16a, when using the nozzle insertion amount limiting function, the amount of protrusion of the nozzle portion 7b relative to the tip surface 16d of the sleeve portion 16a can be changed (increased or decreased) depending on which size accessory member 16 is attached to the insertion tube 7. For example, if it is desired to change the protrusion amount of the nozzle portion 7b to a larger amount than the protrusion amount L1 shown in Figure 17 (for example, 5.0 mm or more and 6.5 mm or less), as shown in Figure 18, the protrusion amount (maximum value) L2 of the nozzle portion 7b can be made larger than the above protrusion amount L1 by attaching an accessory member 16 of a suitable size to the insertion tube 7. This makes it possible to change the insertion amount when inserting the nozzle portion 7b into the incision 50a of the cornea 50. Furthermore, the intraocular lens inseminator 1 of this embodiment has the effect of allowing the user to select between a screw-type and a push-type operation method for the intraocular lens inseminator 1 (hereinafter referred to as the "first effect"), and the effect of allowing the user to select whether or not to use the nozzle insertion amount limiting function (hereinafter referred to as the "second effect"). However, the first effect and the second effect are obtained by different configurations. That is, the first effect is obtained by a configuration comprising the inseminator body 5, rotating member 8, plunger 9, and rod 10 as described above (hereinafter referred to as the "first configuration"), and the second effect is obtained by a configuration comprising the insertion tube 7 and accessory member 16 as described above (hereinafter referred to as the "second configuration"). Therefore, the first effect can be obtained even without the second configuration, and the second effect can be obtained even without the first configuration. Furthermore, in this embodiment, a tapered portion 16i is formed in the through hole 16c of the accessory member 16, and by bringing this tapered portion 16i into contact with the outer surface of the nozzle portion 7b, a configuration is adopted that allows the outer diameter of the nozzle portion 7b to be reduced. As a result, even if the size of the incision made in the eyeball is reduced, the tip of the nozzle portion 7b can be easily inserted into this incision. Also, when the intraocular lens 4 is passed through the nozzle portion 7b in a folded state, the nozzle portion 7b is deformed by being pressed from the inside by the intraocular lens 4. At this time, if a notch 7k is formed in the nozzle portion 7b, even if the nozzle portion 7b is deformed by being pressed by the intraocular lens 4, it becomes less likely for damage such as cracks to occur in the nozzle portion 7b. In addition, the amount of deformation of the nozzle portion 7b is kept to the minimum necessary for the release of the intraocular lens 4. As a result, the intraocular lens 4 can be inserted through a smaller incision. Furthermore, in this embodiment, a configuration is adopted in which a viewing window 16g is formed in the accessory member 16. Therefore, even when the intraocular lens inseminator 1 is used with the accessory member 16 attached to the insertion tube 7, the state of the intraocular lens 4 moving inside the insertion tube 7 can be visually observed from the outside through the viewing window 16g. Thus, even with the accessory member 16 attached, the user of the intraocular lens inseminator 1 can operate the intraocular lens inseminator 1 while visually confirming the state of the intraocular lens 4 being pushed out by the rod 10. <Second Embodiment> Next, a second embodiment of the present invention will be described. Figure 19 is a perspective view showing an intraocular lens inserter according to a second embodiment of the present invention, with an accessory member attached to the insertion tube. The configuration of the insertion tube and accessory member according to the second embodiment of the present invention will be described in detail below. (Insertion tube) Figure 20 is a perspective view showing the configuration of the insertion tube according to a second embodiment of the present invention. The insertion tube 7 differs from the first embodiment in only the configuration of the engagement portion. Specifically, in the first embodiment, the engagement portion is composed of three protrusions 7h, 7i, and 7j, while in the second embodiment, the engagement portion is composed of a single locking claw 7m. The locking claw 7m is formed in a roughly U-shape when viewed from the front, extending from both sides to the bottom surface of the second portion 7g of the insertion tube body 7a. Furthermore, the locking claw 7m is formed to protrude downward from the bottom surface of the second portion 7g. (Accessories) Figure 21 is a perspective view showing the configuration of an accessory member according to a second embodiment of the present invention. Figure 22 also shows the configuration of an accessory member according to a second embodiment of the present invention, where (A) is a top view, (B) is a side view, (C) is a bottom view, and (D) is a rear view. The attached member 16, like the first embodiment described above, is equipped with a sleeve portion 16a and an engagement portion 16b, but the configuration of the engagement portion 16b is different. Specifically, the engagement portion 16b has a tongue piece 16j integrally formed in addition to the viewing window 16g, and does not have a hook portion 16e or a stopper portion 16f. The tongue piece 16j is formed to extend from the lower part of the engagement portion 16b in the axial direction of the attached member 16. The tongue piece 16j is formed in a ladder shape having three engagement holes 16k. In the following description, the three engagement holes 16k will be distinguished by identification codes such as 16k-1, 16k-2, and 16k-3. The three engagement holes 16k-1, 16k-2, and 16k-3 are formed adjacent to each other at a predetermined interval in the axial direction of the attached member 16. Furthermore, the three engagement holes 16k-1, 16k-2, and 16k-3 are arranged sequentially from front to rear in the axial direction of the attached member 16. The attached member 16 is secured to the insertion cylinder 7 by the engagement of the locking claw 7m of the insertion cylinder 7 into one of the three engagement holes 16k-1, 16k-2, and 16k-3. Figure 23 shows the attached components in the insertion tube, with (A) being a plan view, (B) a side view, and (C) a bottom view. Figure 24(A) is a cross-sectional view of the section between J2 and J2 in Figure 23, (B) is a cross-sectional view of the section between J1 and J1 in Figure 23, and (C) is an enlarged view of section K in (B). As shown in the figure, when the accessory member 16 is attached to the insertion tube 7, the nozzle portion 7b is fitted into the through hole 16c of the sleeve portion 16a. The locking claw 7m formed on the insertion tube 7 engages with the central engagement hole 16k-2 of the three engagement holes 16k-1, 16k-2, and 16k-3 formed on the tongue piece 16j of the accessory member 16. At this time, the tip surface 16d of the sleeve portion 16a is positioned to protrude outward from the outer circumferential surface of the nozzle portion 7b, and is also positioned to be inclined in the same direction as the cut surface of the nozzle portion 7b with respect to the axial direction of the insertion tube 7. When using the nozzle insertion amount limiting function, the locking claw 7m is engaged with one of the three engagement holes 16k-1, 16k-2, or 16k-3. In this case, the amount of protrusion of the nozzle portion 7b relative to the tip surface 16d of the sleeve portion 16a changes depending on which engagement hole 16k the locking claw 7m is engaged with. Figure 25(A) is a side view showing the state in which the locking hole 7m is engaged with the rear engagement hole 16k-3. In this state, the attached member 16 is positioned relatively towards the front in the axial direction of the insertion cylinder 7. Therefore, the amount of protrusion of the nozzle portion 7b becomes relatively small. In contrast, Figure 25(B) is a side view showing the state in which the locking hole 7m is engaged with the central engagement hole 16k-2. In this state, the amount of protrusion of the nozzle portion 7b is larger compared to the state in Figure 25(A). Figure 25(C) is a side view showing the state in which the locking hole 7m is engaged with the front engagement hole 16k-1. In this state, the accessory member 16 is positioned relatively towards the rear in the axial direction of the insertion cylinder 7. As a result, the amount of protrusion of the nozzle portion 7b is larger compared to the state in Figure 25(B). As described above, in the second embodiment of the present invention, the amount of protrusion of the nozzle portion 7b can be changed (adjusted) in three stages: large, medium, and small, by appropriately moving the attached member 16 in the axial direction of the insertion cylinder 7 and engaging the locking piece 7m with one of the engagement holes 16k of the tongue piece 16j. Furthermore, if more engagement holes 16k are formed in the tongue piece 16j of the attached member 16, the amount of protrusion of the nozzle portion 7b can be changed in more stages. Also, when the attached member 16 is pressed in the axial direction of the insertion cylinder 7 while the locking piece 7m of the insertion cylinder 7 is engaged with the central engagement hole 16k-2, the tongue piece 16j of the attached member 16 undergoes elastic deformation (flexural deformation) in response to the pressing force, thereby causing the locking piece 7m to engage with the adjacent engagement hole 16k-1 or 16k-3. For this reason, the amount of protrusion of the nozzle portion 7b can be changed while the attached member 16 remains attached to the insertion cylinder 7. This makes it possible to change the amount the nozzle portion 7b protrudes without having to attach or detach the accessory member 16 to the insertion tube 7. Therefore, it eliminates the hassle of removing the accessory member 16 from the insertion tube 7 and the hassle of placing the removed accessory member 16 on a tray or the like. Furthermore, there is no risk of the accessory member 16 being dropped or lost due to user carelessness after being removed from the insertion tube 7. Furthermore, if the nozzle insertion amount limiting function is not used, the entire nozzle portion 7b can be exposed by, for example, releasing the engagement between the locking piece 7m and the tongue piece 16j and removing the accessory member 16 from the insertion cylinder 7. Alternatively, the accessory member 16 may be attached to the insertion cylinder 7, and when the accessory member 16 is moved backward by a predetermined amount, the entire nozzle portion 7b may be exposed, and in that state, the accessory member 16 may be secured to the insertion cylinder 7 by the engagement between the locking piece 7m and the engagement hole 16k. If this configuration is adopted, it is possible to switch whether or not to use the nozzle insertion amount limiting function without removing the accessory member 16 from the insertion cylinder 7. For this reason, the accessory member 16 does not need to be detachable from the insertion cylinder 7. <Third Embodiment> Figure 26 is a perspective view showing the configuration of an intraocular lens inserter according to the third embodiment of the present invention. Figure 27(A) is a plan view showing the configuration of the intraocular lens inserter according to the third embodiment of this invention, (B) is a side view, and (C) is a cross-sectional view taken along line M-M in (A). The intraocular lens inserter 1 according to the third embodiment of the present invention differs from the first embodiment in the position and structure of the rotation restricting portion 13, the structure of a part of the plunger 9, the structure of the insertion tube 7, and the structure of the accessory member 16. (Location and structure of the rotation restricting mechanism) Figure 28 is a perspective view showing the configuration of the inserter body according to the third embodiment of the present invention, where (A) shows the state in which the rotation restricting part provided on the inserter body is open, and (B) shows the state in which the rotation restricting part is closed. The rotation restricting portion 13 is formed at the rear end of the inserter body 5, slightly behind the flange portion 14 in the axial direction of the inserter body 5. When the rotating member 8 is attached to the rear end of the inserter body 5, the rotation restricting portion 13 is positioned inside the rotating member 8 (see Figure 27(C)). As a result, the entire rotation restricting portion 13 is shielded by the rotating member 8. The function and structure of the rotation restricting portion 13 are basically the same as those of the first embodiment described above. As described above, by forming the rotation restricting portion 13 at the rear end of the inserter body 5 and shielding the rotation restricting portion 13 with a rotating member 8 attached thereto, the length of the inserter body 5 can be shortened compared to the first embodiment, and the intraocular lens inserter 1 can be made smaller. Furthermore, after the intraocular lens inserter 1 is assembled, the rotation restricting portion 13 is hidden inside the rotating member 8, making it impossible to open the rotation restricting portion 13. This reduces the risk of the surgeon or other personnel disassembling the intraocular lens inserter 1. In addition, since it is no longer necessary to form the rotation restricting portion 13 in front of the flange portion 14, reinforcing ribs 18 can be formed on the outer circumferential surface of the inserter body 5 to reinforce the flange portion 14. As a result, deformation of the flange portion 14 can be suppressed even when a strong force is applied to the flange portion 14 during push-type operation. In this third embodiment, the entire rotation restricting portion 13 is shielded by the rotating member 8. However, the configuration is not limited to this; as long as at least a part of the rotation restricting portion 13 is shielded by the rotating member 8, the risk of the surgeon or other personnel disassembling the intraocular lens inserter 1 can be reduced. Furthermore, the position of the rotation restricting portion 13 adopted in this third embodiment can also be adopted in the first and second embodiments described above. Furthermore, in this third embodiment, a hook mechanism is employed to hold the rotation restricting section 13 in a closed state. The hook mechanism comprises, for example, a first hook claw 13e formed on the rotation restricting section 13 and a second hook claw 19 formed on the outer circumferential surface of the inserter body 5, as shown in Figure 39(A). Figures 39(A) to (D) all show the rotation restricting section 13 as viewed from the rear of the inserter body 5. The first hook claw 13e is formed on the rotation restricting portion 13 on the opposite side of the pivot portion 13a. The pivot portion 13a connects the rotation restricting portion 13 to the inserter body 5 and supports the rotation restricting portion 13 so that it can rotate (open and close). The second hook claw 19 is formed on the opposite side of the pivot portion 13a in the left-right direction. In the hook mechanism with the above configuration, when the rotation restricting part 13 is closed from an open state, the first hook claw 13e of the rotation restricting part 13 catches on the second hook claw 19 of the inserter body 5 and locks into place. At this time, in the radial direction of the inserter body 5, the first hook claw 13e is positioned relatively outward, and the second hook claw 19 is positioned relatively inward. In addition, the plunger 9 fits into the guide groove 13c formed between the pair of sliding guides 13b of the rotation restricting part 13. Therefore, when the rotating member 8 is rotated to use the intraocular lens inserter 1 in a screw-type manner, the rotation of the plunger 9 in the axial direction of the inserter body 5 is restricted by the rotation restricting part 13. Furthermore, since the first threaded portion 8b of the rotating member 8 and the second threaded portion 9c of the plunger 9 are engaged with each other, when the rotating member 8 is rotated to move the plunger 9 forward, a rotational force Fr is applied to the plunger 9 by the rotation of the rotating member 8. When a rotational force Fr is applied to the plunger 9, the rotation restricting portion 13 is pushed by the plunger 9. As a result, the first hook claw 13e of the rotation restricting portion 13 is pressed against the second hook claw 19. Therefore, the first hook claw 13e and the second hook claw 19 can be held in a locked state. Consequently, there is no risk of the first hook claw 13e and the second hook claw 19 coming loose during the rotation of the rotating member 8. In contrast, if, for example, as shown in Figure 39(B), the positional relationship between the pivot portion 13a of the rotation restricting portion 13 and the first hook claw 13e is reversed left to right, and the second hook claw 19 is formed on the inserter body 5 accordingly, there is a risk that the first hook claw 13e and the second hook claw 19 may detach during the rotation operation of the rotating member 8. Specifically, when a rotational force Fr is applied to the plunger 9 by the rotation operation of the rotating member 8, depending on the properties of the material constituting the inserter body 5 (including the rotation restricting portion 13), the rotation restricting portion 13 may deform or be displaced by being pushed by the rotational force Fr. As a result, there is a risk that the first hook claw 13e may be displaced outward and detach from the second hook claw 19. For this reason, as shown in Figure 39(A), it is preferable to configure the system so that the rotational force Fr applied to the plunger 9 by the rotation operation of the rotating member 8 is applied in a direction that presses the first hook claw 13e against the second hook claw 19. Furthermore, as shown in Figure 39(C), it is also possible to adopt a configuration in which the first hook claw 13e of the rotation restricting part 13 is positioned relatively inward, and the second hook claw 19 of the inserter body 5 is positioned relatively outward. In this configuration as well, the rotational force Fr applied to the plunger 9 by the rotational operation of the rotating member 8 is applied in a direction that presses the first hook claw 13e against the second hook claw 19. Therefore, there is no risk of the first hook claw 13e and the second hook claw 19 coming off during the rotational operation of the rotating member 8. Incidentally, as shown in Figure 39(D), if the positional relationship between the pivot part 13a of the rotation restricting part 13 and the first hook claw 13e is reversed left to right, and the second hook claw 19 is formed on the inserter body 5 accordingly, the rotation restricting part 13 may deform or be displaced by being pushed by the rotational force Fr applied to the plunger 9. As a result, there is a risk that the first hook claw 13e will be pushed outward and come off the second hook claw 19. Therefore, it is preferable to adopt the configuration shown in Figure 39(C). Furthermore, the hook mechanism shown in Figures 39(A) to (D) is also applicable to the first and second embodiments described above, and in those cases, it is preferable to adopt the configuration shown in Figure 39(A) or (C). (Part of the plunger structure) A pressing plate portion 9d is formed at the rear end of the plunger 9. The pressing plate portion 9d is the part against which the operator's thumb is pressed when operating in a push manner, and is formed to protrude radially from the plunger shaft 9a. The surface of the pressing plate portion 9d against which the operator's thumb is pressed may be provided with irregularities to prevent slipping. As described above, when a pressing plate portion 9d is provided at the rear end of the plunger 9, operation using a push method becomes easier. Also, compared to the first embodiment, the rear end of the plunger 9 contacts the thumb over a wider surface area, so the load applied to the thumb when pushing in the plunger 9 is distributed. Therefore, the burden on the thumb can be reduced. Furthermore, the configuration in which a pressing plate portion 9d is provided at the rear end of the plunger 9 can also be adopted in the first embodiment and the second embodiment described above. (Structure of the insertion tube) Figure 29 shows the configuration of the insertion tube according to the third embodiment of the present invention, where (A) is a plan view, (B) is a side view, and (C) is a bottom view. Figure 30(A) is a perspective view of the insertion tube according to the third embodiment of the present invention viewed from diagonally above, and (B) is a perspective view viewed from diagonally below. The insertion tube 7 has a hollow insertion tube body 7a and a thin tubular nozzle portion 7b, with an injection hole 7c formed on the upper surface of the insertion tube body 7a. The insertion tube body 7a is divided into a first portion 7f and a second portion 7g. The rear end of the insertion tube body 7a is open, and a hook portion 7d and a wedge portion 7e are formed around this opening. A notch 7k is formed in the nozzle portion 7b. The above points are the same as in the first embodiment described above. A locking portion 71 is formed on the lower surface of the first portion 7f of the insertion tube body 7a. The locking portion 71 has two small protrusions 71a and 71b and a groove 71c. In the axial direction of the insertion tube 7, the small protrusion 71b is positioned between the small protrusion 71a and the groove 71c. The small protrusion 71a has a slope 71d. The slope 71d has an inclination such that the amount of protrusion of the small protrusion 71a gradually increases toward the tip of the insertion tube 7. A pair of guide ribs 72 are formed on both sides of the second portion 7g of the insertion cylinder body 7a. The pair of guide ribs 72 serve as guides for positioning the insertion cylinder 7 and the attached member 16 relative to each other in the axial direction of the insertion cylinder 7 when attaching the attached member 16 to the insertion cylinder 7. The pair of guide ribs 72 are formed to protrude in a wing-like shape from both sides of the insertion cylinder body 7a (second portion 7g). (Composition of attached components) Figure 31 is a perspective view of an accessory member according to the third embodiment of the present invention, viewed from diagonally above, where (A) shows the accessory member before attachment to the insertion tube, and (B) shows the accessory member after attachment to the insertion tube. Figure 32 shows the configuration of the accessory member according to the third embodiment of the present invention, where (A) is a plan view, (B) is a side view, and (C) is a bottom view. Figure 33 is a view taken along arrow N in Figure 32(B). Note that Figure 32 shows the accessory member before attachment to the insertion tube. The attached member 16 is a member that provides a nozzle insertion amount limiting function, similar to the first embodiment described above. The material of the attached member 16 is preferably resin, and more preferably transparent or translucent resin. It is desirable that the attached member 16 be made of a single molded resin product. The attached member 16 is a separate member from the insertion cylinder 7 and is configured to be movable relative to the insertion cylinder 7. The direction in which the attached member 16 can move relative to the insertion cylinder 7 is the axial direction of the insertion cylinder 7. Furthermore, in this third embodiment, once the attached member 16 is attached to the insertion cylinder 7, it cannot be removed from the insertion cylinder 7, but the attached member 16 is configured to be movable in the axial direction of the insertion cylinder 7 while it is attached to the insertion cylinder 7 (details will be described later). The tip of the accessory member 16 has a protruding tip surface 161. The protruding tip surface of the accessory member 16 is the part that comes into direct contact with the cornea when the intraocular lens is inserted into the eye. For this reason, in order to minimize damage to the cornea, the main body of the accessory member 16 (excluding the protruding tip) may be made of a rigid resin, and the protruding tip may be made of a flexible resin such as silicone or urethane. The tip surface 161, which serves as the protruding tip surface, is formed in a shape (C-shape) with the upper part of a ring cut out. A viewing window 162 is formed at the top of the attachment member 16. A hole 163 is formed at the bottom of the attachment member 16. The viewing window 162 is formed so that the state of the intraocular lens 4 moving inside the insertion tube 7 can be viewed from the outside, even when the attachment member 16 is attached to the insertion tube 7. The width of the viewing window 162 gradually narrows from the rear end to the front end of the attachment member 16, corresponding to the change in the width of the insertion tube 7. The front end of the viewing window 162 is open and not closed, and communicates with the notched portion of the front surface 161. Therefore, even when the attachment member 16 is attached to the insertion tube 7, the entire portion of the insertion tube 7 from the insertion tube body 7a to the nozzle portion 7b can be viewed from the outside through the viewing window 162. Thus, when pushing out the intraocular lens 4 through the nozzle portion 7b of the insertion tube 7, the state of the intraocular lens 4 moving inside the insertion tube 7 can be viewed without being obstructed by the attachment member 16. A pair of left and right side plates 164 are provided on both sides of the accessory member 16. As shown in Figure 34, a slit groove 164a is formed on the inner surface of each side plate 164. The slit groove 164a is formed to correspond to the guide rib 72 of the insertion tube 7. Figure 34 is a longitudinal cross-sectional view of the accessory member 16 with the locking portion 167 closed. A gripping portion 165 is formed on the outer surface of each side plate 164. The gripping portions 165 are provided on both the left and right sides of the accessory member 16 so that the operator can grip the accessory member 16 with their index finger and thumb when handling the accessory member 16. The gripping portions 165 have an uneven structure to make it easier for the operator to grip the accessory member 16. The rear of the accessory member 16 is provided with a bridging portion 166 and an engagement portion 167. The bridging portion 166 is formed on the upper part of the accessory member 16 so as to span between a pair of side plate portions 164. Part of the bridging portion 166 is bent into a corrugated shape so as not to block the injection hole 7c when the accessory member 16 is attached to the insertion cylinder 7. The bridging portion 166 is connected to the engagement portion 167 by a connecting portion 168. The connecting portion 168 is provided on one side in the left-right direction. The connecting portion 168 is formed thinly to have appropriate flexibility. The engagement portion 167 is supported so as to be rotatable around the connecting portion 168 as the center (fulcrum), utilizing the flexibility of the connecting portion 168. Figure 33 shows the engagement portion 167 in an open state, and the engagement portion 167 can be closed by rotating the engagement portion 167 in the direction indicated by the dashed arrow in the figure. When attaching the accessory member 16 to the insertion tube 7, the engaging portion 167 can be engaged with the attached portion 71 by rotating it to close the engaging portion 167. A connecting claw 169 is formed on the bridging portion 166. The connecting claw 169 is formed as a projection on the side opposite the connecting portion 168 in the left-right direction. On the other hand, a connecting hole 170 is formed on the locking portion 167 corresponding to the connecting claw 169. The connecting claw 169 and the connecting hole 170 connect the bridging portion 166 and the locking portion 167 in an annular manner by connecting the bridging portion 166 and the locking portion 167 on the side opposite the connecting portion 168. Specifically, by rotating the locking portion 167 around the connecting portion 168 to close it, the connecting claw 169 and the connecting hole 170 are fitted together and connected. This makes it possible to connect the bridging portion 166 and the locking portion 167 in an annular manner. When attaching the accessory member 16 to the insertion cylinder 7, the bridging portion 166 is positioned on the upper side of the insertion cylinder body 7a (first portion 7f), and the locking portion 167 is positioned on the lower side of the insertion cylinder body 7a. Therefore, the insertion cylinder body 7a is surrounded by the bridging portion 166 and the engaging portion 167. Furthermore, when the bridging portion 166 and the engaging portion 167 are connected, their inner circumferential surfaces take on a shape corresponding to the outer circumferential surface of the insertion cylinder body 7a. The engagement portion 167 has a fixed piece 171 and a movable piece 172 extending forward from the fixed piece 171. The movable piece 172 has a hole 173 between it and the fixed piece 171. The movable piece 172 has the property of being able to bend (hereinafter referred to as "leaf spring property") with the connection portion between the fixed piece 171 and the movable piece 172 as the fixed end and the tip portion 172a of the movable piece 172 as the free end. The fixed piece 171 and the movable piece 172 are formed in correspondence with the small protrusions 71a, 71b and the groove 71c that constitute the engagement portion 71 of the insertion cylinder 7. The tip portion 172a of the movable piece 172 is configured to be able to overcome the small protrusion 71a by moving along the slope 71d of the small protrusion 71a. Then, as the tip 172a of the movable piece 172 moves along the slope 71d and overcomes the small protrusion 71a, the attached member 16 moves forward, and the amount of protrusion of the nozzle portion 7b changes. A connecting bar 174 is formed at the lower part of the attached member 16 so as to span between a pair of side plate portions 164. The connecting bar 174 is positioned so as to face the tip portion 172a of the movable piece 172 when the locking portion 167 is closed. In the axial direction of the attached member 16, a hole 163 is formed in front of the connecting bar 174. (Installation procedure for included components) Next, the procedure for attaching the accessory member 16 to the insertion tube 7 will be described. Note that the attachment of the accessory member 16 is performed during the manufacturing process (assembly process) of the intraocular lens inserter 1. First, as shown in Figure 35, the attached member 16 with the engagement portion 167 open is positioned in front of the nozzle portion 7b of the insertion cylinder 7. Next, by bringing the attachment member 16 and the insertion cylinder 7 closer together, the attachment member 16 is placed over the outside of the insertion cylinder 7, as shown in Figure 36. At this time, the attachment member 16 is inserted all the way to the rear end of the insertion cylinder 7. This causes the nozzle portion 7b to protrude by a predetermined amount from the tip surface 161 of the attachment member 16. When inserting the attachment member 16 into the insertion cylinder 7, a pair of guide ribs 72 formed on the insertion cylinder 7 are fitted into a pair of slit grooves 164a formed on the attachment member 16 in correspondence with these ribs. This positions the insertion cylinder 7 and the attachment member 16 in the axial direction of the insertion cylinder 7. Next, by rotating the connecting portion 168 of the attached member 16 to close the engaging portion 167, the connecting hole 170 of the engaging portion 167 and the connecting claw 169 of the bridging portion 166 are fitted together and connected. As a result, the bridging portion 166 and the engaging portion 167 are joined in an annular manner. By following the above procedure, the accessory member 16 can be attached to the insertion tube 7. Once the accessory member 16 is attached to the insertion tube 7, it cannot be removed from the insertion tube 7. In other words, in this third embodiment, the accessory member 16 is not removable from the insertion tube 7. However, the accessory member 16 is configured to be movable relative to the insertion tube 7. This point will be explained below. First, when the accessory member 16 is attached to the insertion tube 7 as described above, the positional relationship between the small protrusions 71a, 71b, and groove 71c of the insertion tube 7 and the fixing piece 171, movable piece 172, and connecting bar 174 of the accessory member 16 is as shown in Figure 37. That is, in the axial direction of the insertion tube 7, the small protrusion 71a is positioned between the tip 172a of the movable piece 172 and the connecting bar 174, and the small protrusion 71b is positioned between the tip 172a of the movable piece 172 and the fixing piece 171. Also, the tip 172a of the movable piece 172 is positioned in contact with (or close to) the front surface of the small protrusion 71b adjacent to the slope 71d of the small protrusion 71a, and the connecting bar 174 is positioned in contact with (or close to) the entire surface of the small protrusion 71a. To move the attached member 16 from that state, first, the operator grasps the pair of gripping parts 165 formed on both sides of the attached member 16 with two fingers (usually the index finger and thumb). Next, while grasping the pair of gripping parts 165 with the fingers, a force in the P direction is applied to the attached member 16. As a result, the movable piece 172 formed on the lower part of the attached member 16 comes into contact with the slope 71d of the small projection 71a of the insertion tube 7 and deforms due to the leaf spring properties of the movable piece 172 itself. Then, the tip 172a of the movable piece 172 moves along the slope 71d and, once it has passed over the tip of the small projection 71a, the movable piece 172 returns to its original shape due to its own leaf spring properties. As a result, the positional relationship between the small protrusions 71a, 71b, and groove 71c of the insertion cylinder 7 and the fixing piece 171, movable piece 172, and connecting bar 174 of the accessory member 16 is as shown in Figure 38. That is, in the axial direction of the insertion cylinder 7, the small protrusion 71a is positioned between the tip 172a of the movable piece 172 and the fixing piece 171, and the small protrusion 71b is also positioned between the tip 172a of the movable piece 172 and the fixing piece 171. Furthermore, the tip 172a of the movable piece 172 is positioned in contact with (or close to) the front surface of the small protrusion 71a, and the fixing piece 171 is positioned in contact with (or close to) the rear surface of the small protrusion 71b. Thus, in this embodiment, the attachment member 16 can be moved in the axial direction of the insertion tube 7 while the attachment member 16 remains attached to the insertion tube 7. Therefore, the amount of protrusion of the nozzle portion 7b can be changed while the attachment member 16 remains attached to the insertion tube 7. As a result, surgeons who prefer a technique of deeply inserting the nozzle portion 7b into the incision of the eyeball can use the intraocular lens injector 1 in the state shown in Figure 37, and surgeons who prefer a technique of shallowly inserting the nozzle portion 7b can use the intraocular lens injector 1 in the state shown in Figure 38. Therefore, surgeons performing cataract surgery can use the intraocular lens injector 1 according to their preferred technique. In this third embodiment, the attachment member 16 is made movable in the axial direction of the insertion cylinder 7, allowing the amount of protrusion of the nozzle portion 7b to be adjusted in two stages. However, the embodiment is not limited to this, and a configuration that allows adjustment in three or more stages is also possible. Furthermore, in this third embodiment, after the attachment member 16 attached to the insertion tube 7 is moved forward, the attachment member 16 cannot be returned to its original position (rearward) due to contact between the tip portion 172a of the movable piece 172 and the small projection 71a. However, the embodiment is not limited to this, and the attachment member 16 may be configured to be returned to its original position. <Examples of variations, etc.> The technical scope of the present invention is not limited to the embodiments described above, but also includes various modified and improved forms to the extent that specific effects can be obtained by the constituent elements of the invention or combinations thereof. For example, in the above embodiment, the plunger 9 and the rod 10 are made of separate components, but it is also possible to make them an integrated structure. Furthermore, in the above embodiment, the viewing window 16g was formed by cutting out a part of the attached member 16, but the invention is not limited to this, and a hole (not shown) of an appropriate size may be made in a part of the attached member 16, and this hole may be used as the viewing window. Furthermore, in the above embodiment, the inserter body 5 and the insertion tube 7 were assembled together to form a hollow body, but the hollow body may be a single integrated structure (such as a single molded resin product). Furthermore, in the above embodiment, a slider 6 is included as one of the components of the intraocular lens inserter 1. However, this slider 6 is an auxiliary member for folding the intraocular lens 4 into a desired shape and is not necessarily required for inserting the intraocular lens 4 into the eye. For this reason, if, for example, the structure of the lens mounting section 11 in the inserter body 5 or the tip structure of the rod 10 can be modified so that the intraocular lens 4 can be folded into a desired shape simply by pushing it out with the rod 10, then there is no need to provide a slider 6. 1…Intraocular lens inserter 4. Intraocular lens 5. Insertion device body 7... Insertion tube 7b... Nozzle part 7k...cut section 7m...locking claw 8... Rotating member 8b...First threaded portion 9... Plunger 9c...Second threaded section 10... Rod 11...Lens mounting section 13... Rotation restricting section 13d... Retaining part 16... Attached parts 16a...Tip surface 16b...Locking part 16g... peephole 16i...Tapered section 16j...tongue piece 16k...Engagement hole

Claims

------26 / 03 / 2019------(OCR) Page 1 of 2 pages of claims 1. Intraocular lens injector for the insertion of an intraocular lens into the eye, comprising: a hollow body with an injector; and an attachment element with protruding surfaces positioned in a state of protrusion outward from the outer circumferential surface of the injector, where the attachment element is arranged in a movable manner with the hollow body.

2. Intraocular lens injector as per claim 1, in which the attachment element is removable and can be attached to / from the hollow body.

3. An intraocular lens guide device under Case 1 or 2 in which the attachment part can move in the axial direction of the hollow body.

4. An intraocular lens guide device under Case 3 in which the attachment part can move in the axial direction of the hollow body while attached to the hollow body.

5. An intraocular lens guide device under any of Cases 1 through 4 in which the attachment part attached to the hollow body is made in the attachment part, and the part which is attached is made in the hollow body corresponding to the attachment part. 6.The intraocular lens guide device under claim 5, in which the attachment has a locking mechanism in which the attachment is temporarily fixed to the hollow body by an interlocking mechanism between the attachment and the attached part.

7. An intraocular lens guide device under Case 5 in which the attachment part includes a sub-flange with more than one number of attachment holes made on it, and the part which is attached includes a locking tab which is attached to one of more than one of the attachment holes.

8. An intraocular lens guide device under Cases 1 through 7 in which the attachment part is designed to limit the amount of conduction by the protruding surface when the nozzle is inserted into the surgical incision of the eye.

9. An intraocular lens guide device under Cases 1 through 8 in which a viewing window is provided on the attachment part.

10. An intraocular lens guide device under Case 9 in which the protruding surface is made in a shape with an overcut and the viewing window is made to connect to the overcut of the protruding surface. 11.Which of the following intraocular lens guides under Patents 1 through 10 has a protruding surface made of soft resin? (Page 2 of 2, page 12) Which of the following intraocular lens guides under Patents 1 through 11 has a nozzle with a cut-off section made along the axis of the hollow body, and a tapered section is made on the fastener to reduce the outer circumferential diameter of the nozzle by being brought into contact with the outer circumferential surface of the nozzle, which is part of the cut-off section. An intraocular lens injector according to any of the claims 1 through 12, in which a hollow body contains the lens mount, and the intraocular lens is mounted on that lens mount.------------Page 1 of 2 pages of Claims 1. An intraocular lens injector for the introduction of an intraocular lens into the eye, in which it is composed of: a hollow body containing the injector; and an attachment element with protruding surfaces which are positioned in a state of protrusion outward from the outer circumferential surface of the injector, in which the attachment element is arranged in a movable manner with the hollow body. 2.

1. An intraocular lens guide device under Case 1 in which the attachment element is removable and can be attached to / from the hollow body.

3. An intraocular lens guide device under Case 1 or 2 in which the attachment element can move in the axial direction of the hollow body.

4. An intraocular lens guide device under Case 3 in which the attachment element can move in the axial direction of the hollow body while attached to the hollow body.

5. An intraocular lens guide device under one of Cases 1 through 4 in which the attachment point to the hollow body is made in the attachment element, and the attachment point is made in the hollow body corresponding to the attachment point.

6. An intraocular lens guide device under Case 5 in which the attachment point has a locking mechanism in which the attachment element is temporarily fixed to the hollow body by an interlocking mechanism between the attachment point and the attachment point. 7.

8. An intraocular lens guide under Reputation 1 to 7 where the attachment element is designed to limit the amount of conduction by the protruding surface when the nozzle is inserted into the surgical incision of the eye.

9. An intraocular lens guide under Reputation 1 to 8 where a viewing window is provided on the attachment element.

10. An intraocular lens guide under Reputation 9 where the protruding surface is made in a shape with a cut-off top and the viewing window is made to connect to the cut-off top of the protruding surface.

11. An intraocular lens guide under Reputation 1 to 10 where the protruding surface is made of soft resin. Page 2 of 2, page 12.

13. An intraocular lens guide device under any of the claims 1 to 11 in which the nozzle has a cut-off section made in the axial direction of the hollow body, and a taper is made on the mounting part to reduce the outer circumferential diameter of the nozzle, by being brought into contact with the outer circumferential surface of the nozzle, which is part of the cut-off section.