WO2004087019A1

WO2004087019A1 - Distribution container for intraocular lens

Info

Publication number: WO2004087019A1
Application number: PCT/JP2004/004162
Authority: WO
Inventors: Masayoshi Tanaka
Original assignee: Menicon Co., Ltd.
Priority date: 2003-03-28
Filing date: 2004-03-25
Publication date: 2004-10-14
Also published as: JPWO2004087019A1; JP4231048B2; CN1767793A

Abstract

A distribution container for an intraocular lens allowing the easy and stable holding of the intraocular lens on the lens holding part thereof, comprising a base, a cap, and the lens holding part having a pair of lens gripping parts disposed on the base, wherein the pair of lens gripping parts are disposed to be opposed to each other through a separation part for separating the pair of lens gripping parts by a distance allowing the intraocular lens to be held thereon. A holding and stably engaging part is projectedly installed inward from the inner surface of the cap, and the tip of the holding and stably engaging part is chamfered to form an inlet part. The intraocular lens is disposed between the lens gripping parts, the inlet part is brought into contact with the lens holding part when the cap is installed on the base to narrow the distance of the separation part. Thus, the container is characterized in that the intraocular lens disposed between the lens holding parts can be held without being pressed and fallen down.

Description

Akira Itoda Distribution container for intraocular lenses Technical field

The present invention relates to a distribution container for an intraocular lens (hereinafter, referred to as “I〇L”) and a container having a function of folding a foldable I〇L optical unit. Background art

When cataracts occur, surgical procedures to remove the cloudy lens are commonly performed, and often introduce an artificial lens, the IOL. In such a surgical procedure, an incision is usually made in a part of the eye (conjunctiva and sclera), and surgery is performed through the incision.

Large incisions are likely to cause astigmatism after surgery.Therefore, in recent years, it has been desired to perform surgery with the incision as small as possible. A bendable IOL has been developed so that it can be used in the field.

For this reason, various methods and apparatuses for bending IOL have been conventionally proposed.

For example, a method and a device for bending an IOL with a hinge-like device, and a case in which the IOL is combined with the device have been proposed (see, for example, JP-A-3-215258).

In addition, an auxiliary device has been proposed that facilitates the operation of bending the I〇L optical unit by grasping it in the diameter direction with forceps (for example, see Japanese Patent Application Laid-Open No. Hei 4-309348). In addition, when bending the I〇L stored in the case, after removing the lid from the board, the knobs on both sides of the split groove of the board are picked, and the IOL optical pinch is sandwiched between the knobs on both sides. There has also been proposed one that can be bent (see, for example, JP-A-2001-161727). Further, there has been proposed a type in which I〇L is folded in conjunction with an operation of opening a cover for protecting IOL (for example, see Japanese Patent Application Laid-Open No. 2002-102261).

Further, a folding instrument provided with a guide for regulating the position of the forceps when picking up the folded IOL with the forceps has been proposed (for example, see Japanese Patent Application Laid-Open No. 2002-248122).

Further, there has been proposed an apparatus that folds an IOL by a rotary movable operation part that is coupled to a movable folding surface via a cam mechanism and a contact slider mechanism (see, for example, Japanese Patent Application Laid-Open No. 2002-515291).

Then, remove the cap, remove the folder from the base, insert the jaws of the tweezers for picking the IOL into the recess, press the pair of rails of the folder against each other, and place the IOL so that the jaws face each other. It has also been proposed that the IOL can be held between the jaws of a pair of tweezers by being moved (see, for example, US Pat. No. 5,528,127).

However, in the case of the invention disclosed in JP-A-3-215258, it is necessary to take out the device from the case to bend the IOL, and the IOL comes off or pops out at the time of bending. There is a high possibility that dust and bacteria may adhere to the IOL.

Also, in the case of the invention disclosed in Japanese Patent Application Laid-Open No. 4-309348, it is necessary to maintain a state in which the frame of the folding device is grasped in order to hold the frame in a folded state. Dust and bacteria adhere to the IOL There is a risk of doing so.

Further, in the case of the invention disclosed in Japanese Patent Application Laid-Open No. 2001-161727, since the folding operation is performed after the lid is opened, there is a possibility that I〇L may come off and fly out during the folding operation. In addition, in order to hold in a bent state, it is necessary to maintain the knob portion in a pinched state. Furthermore, if the IOL is not transplanted and inserted into the bladder bag immediately after opening the lid, dust and bacteria may adhere to the IOL.

Further, in the case of the invention disclosed in Japanese Patent Application Laid-Open No. 2002-102261, since the folding operation is performed while the lid is being changed from the closed state to the open state, the folded state is opened. Therefore, if the IOL is not immediately implanted and inserted into the sacs, dust and bacteria may adhere to the I〇L.

Further, in the case of the invention disclosed in Japanese Patent Application Laid-Open No. 2002-248122, since the operation is performed in an open state, there is a possibility that dust or bacteria may adhere to the IOL at the time of bending, or the IOL may come off and fly out.

In the case of the invention disclosed in Japanese Patent Application Laid-Open No. 2002-515291, since the lid is opened and then bent, unless the IOL is immediately implanted and inserted into the sac bag, dust and bacteria may adhere to the I〇L. In addition, there is a risk that the IOL may come off or fly out at the time of bending.

Furthermore, none of the known documents provides a practical means for easily placing I〇L in a case and for securely and securely holding IOL without being squeezed during distribution.

In other words, if the distance between the portions where the IOL is gripped is made larger than the diameter of the optical portion, it becomes easier to dispose the IOL. On the other hand, if the interval between the parts to be gripped by IOL is narrowed, it becomes difficult to remove the IOL. Workability at the time of placement becomes poor. Also, if the interval between the arranged portions is made smaller than the diameter of the optical portion, the 1〇L optical portion is constantly pressed, which causes distortion in the IOL. Disclosure of the invention

An object of the present invention is to solve the above-mentioned conventional problems and to provide an I〇L distribution container in which the IOL can be easily arranged in the lens holding section, and to stably maintain the IOL in the lens holding section. Providing an IOL distribution container that can hold the I〇L by simply selecting the rotation direction of the cap, the I〇L can be easily, safely, and reliably folded in two at the desired center. Provide an IOL distribution container that can be taken out in a state that can be taken out without being bent, and that the IOL will not be exposed immediately when the I〇L is bent, and the bent IOL The purpose of the present invention is to provide an I ことが L distribution container that can maintain a non-exposed state until just before picking up the IOL with forceps or the like and prevent contamination of the IOL by dust and bacteria.

An IOL distribution container according to the present invention includes a base having a lens stage, a cap, and a lens holding portion having a pair of lens holding portions, and the lens holding portion has an interval capable of holding the IOL. An IOL distribution container arranged on the base, wherein the pair of lens holding portions are arranged so as to face each other via a separation portion that separates the IOL by an interval capable of holding the IOL. A holding / stabilizing engagement portion protrudes inward from the inner surface, and a leading end of the holding / stabilizing engagement portion is chamfered to define an introduction portion, and an IOL is disposed on the lens stage and between the lens holding portions. Then, when the cap is attached to the base, the introduction portion comes into contact with the lens holding portion, and the interval between the separation portions is slightly narrowed. Without IOL said lens disposed between the lens grip portion of the holding portion is compressed and be substantially off from the lens grip portion It is characterized by being held without.

The cap base includes a base having a guide hole, a cap having a cap base engaging portion, and a lens holding portion, and is provided so as to be engaged with a claw-shaped projection in the cap base engaging portion. A guide hole, whereby the cap can be slidably engaged with the base, and the guide hole is engaged by fitting the projection into the guide hole; A guide introduction portion configured to allow the cap to be attached to the base so as not to be detached; and a protrusion configured to be slidable without coming off from the guide hole. It is preferable to have at least one guide narrow portion for guiding, and at least one guide wide portion having a width that allows the protrusion to come off the guide hole.The cap may include a cam contact portion, the lens holding portion may include a cam surface, the cam contact portion may protrude inward from an inner surface of the cap, and the damping surface may be one side of the lens holding portion. A force applied as a relative movement of the cap to the base by slidably contacting the force contact portion, acts on the lens stage in a direction in which the distance between the separation portions is reduced. Preferably, the force is converted into a force to bend the optical portion of the IOL disposed between the lens holding portions.

In addition, it is preferable that a slide stop projection is provided at a boundary between the guide introduction portion and the guide narrow portion of the guide hole, and the slide of the cap with respect to the base can be stopped by interfering with the protrusion. .

In addition, the guide introduction portion includes, at both ends thereof, the slide stopping protrusion, the narrow guide width portion, and the wide guide portion. When the cap is slid in one direction with respect to the base, the IOL is bent, and the IOL is bent. It is preferable that the IOL does not bend when sliding.

The base further includes a holding portion fixing portion, and the lens holding portion has a holding portion fixed portion. The holding portion fixing protrusion engages with the holding portion fixing portion so as to maintain a state in which the distance between the separation portions is reduced and prevent restoration of the bent I〇L. Is preferred.

A holding portion engaging portion that engages with the lens holding portion of the base; and a claw-shaped protrusion protruding from the base engaging portion of the lens holding portion, wherein the base engaging portion is provided. Preferably, it is slidably engaged with the holding portion engaging portion. Further, a holding portion housing portion for housing the lens holding portion is defined on the base, and is provided to protrude from a bottom surface of the housing portion of the holding portion housing portion to determine a position of the lens holding portion and hold the lens in a stable manner. It is preferable to include a pin.

In addition, it is preferable that a through hole is formed in the lens stage, the upper surface and the lower surface being opened.

Further, it is preferable that at least one groove is provided on the upper part of the lens stage.

Further, it is preferable that an opening is formed near the guide introduction portion. In addition, it is preferable that the pair of lens grips is connected to each other via an elastic spring frame having an elastic spring structure, and the elastic spring frame urges in the direction in which the separated portion is to be expanded.

Further, a first engaging claw is provided at a tip of a supporting portion support pillar protruding inward of the separation portion from a vicinity of one of the pair of lens holding portions, and the pair of lens holding portions. A second engaging claw at a tip of a support portion support column positioned so as to face the first engaging claw with the separating portion interposed therebetween in the vicinity of the first engaging claw. It is preferable that the second engaging claw is engaged so that the separated portion is held in a narrowed state, and the state in which the IL is bent is maintained.

Further, it is preferable that a support portion support rib protruding upward is further provided on the upper surface of the support portion support column, and the IOL support portion is sandwiched between the support portion support ribs. Further, it is preferable that a window is provided substantially at the center of the upper surface of the cap.

An IOL distribution container according to another aspect of the present invention includes a base, a cap, and a lens holding portion having a pair of lens holding portions, and the base has an interval at which the lens holding portion can hold an intraocular lens. A distribution container for an intraocular lens disposed above, wherein the pair of lens gripping portions are disposed so as to face each other via a separation portion that separates the intraocular lens by a gap that can be gripped, A holding / stable engagement portion protrudes inward from an inner surface of the cap, and a leading end of the holding / stable engagement portion is chamfered to define an introduction portion, and an IOL is arranged between the lens holding portions. After that, when the cap is attached to the base, the introduction portion comes into contact with the lens holding portion, the interval between the separation portions is slightly narrowed, and the intraocular lens disposed between the lens holding portions is reduced. The lens is held without being pressed and substantially without dropping from the lens holding portion. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view of a distribution container according to one embodiment of the present invention. FIG. 2 is a perspective view of a base constituting the distribution container of FIG.

FIG. 3 is an enlarged view of a main part of the base of FIG.

FIG. 4 is a plan view of a cap constituting the distribution container of FIG. Fig. 5 (a) is a sectional view taken along line A-A of Fig. 4, Fig. 5 (b) is a sectional view taken along line B-B of Fig. 4, and Fig. 5 (c) is a sectional view taken along line C-C of Fig. 4. is there.

FIG. 6 is a perspective view of a lens holding unit constituting the distribution container of FIG. FIG. 7 is a sectional view taken along line DD of FIG.

FIG. 8 is an enlarged view of a main part of the lens holding unit of FIG.

FIGS. 9 (a) and 9 (b) are cross-sectional views of the main parts of the distribution container of FIG. You.

FIG. 10 is an enlarged cross-sectional view of a main part of the distribution container of FIG.

FIG. 11 is a perspective view of a distribution container according to another embodiment of the present invention.

FIG. 12 is a plan view of a base constituting the distribution container of FIG. FIG. 13 is a cross-sectional view taken along line EE of FIG.

FIG. 14 is a plan view of a cap constituting the distribution container of FIG. FIG. 15 is a plan view of a lens holding unit constituting the distribution container of FIG.

FIG. 16 is a sectional view taken along line FF of FIG.

FIG. 17 is an enlarged view of a main part of the lens holding unit of FIG.

FIGS. 18 (a) and (b) are enlarged cross-sectional views of a main part of the lens holding unit of FIG. 6, and FIG. 19 is a plan view of a lens holding unit according to still another embodiment of the present invention. .

FIG. 20 is a sectional view taken along line GG of the distribution container of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

The distribution container according to the present embodiment includes a base 10 having a lens stage 15, a cap 40, and a lens holding unit 50 having a pair of lens holding units 54. The pair of lens holding portions 54 are arranged on the base 10 so as to face each other via a separation portion 60 that separates the IOL 1 by an interval at which the IOL 1 can be held.

In addition, a holding / stabilizing engagement portion 46 is protruded inward from the inner surface of the cap 40, and the tip of the holding / stabilizing engagement portion 46 is introduced by being chamfered in an R shape or a tapered shape. Part 46a is defined. When the cap 40 is engaged with the base 10 after the I〇L 1 is placed on the lens stage 15 and between the lens holding portions 54, the introduction portion 46a becomes the lens holding portion. In order to make contact with the side corners of 50 and the side surface 51, and to slightly narrow the clearance 60 to the interval where I〇L 1 can be gripped, the IOL 1 is not pressed and the lens stages 15 and And / or held without substantially falling off the lens grip 54.

The base 10 has a guide hole 31, and the cap 40 has a cap base engaging portion 44. The base 10 is provided with a guide hole 31 formed so as to engage with a claw-shaped protrusion 44 N at the tip of the cap base engaging portion 44. The cap 40 can be slidably engaged with the base 10 by fitting the projection 44N into the guide hole 31. Here, if the corners of the cap base engaging portion 44 are chamfered into an R shape, the resistance at the time of inserting the cap pace engaging portion 44 can be reduced, and the advantage that deformation can be prevented. is there. Further, as another embodiment, one of the guide hole 31 and the cap base engaging portion 44 is provided with a protrusion formed in a claw shape, and the other is formed so as to be engaged with the protrusion. A hole may be provided so that both are slidably engaged.

In the guide hole 31, a protrusion 44 N is fitted into and engaged with the guide hole 31, and a guide introduction portion 32 is provided so that the cap 40 can be attached so as not to come off the base 10. The projection 44N can slide without coming off the guide hole 31.In order to guide the sliding of the cap 40 with respect to the base 10, at least the guide introduction portion 32 is sandwiched. One guide narrow portion 3 3 and at least one guide wide portion 34 having a width such that the protrusion 44 N can deviate from the guide hole 31 are defined.

When the guide introduction portion 32 is formed into a tapered shape 32a having a wide front side and a narrow rear side that first comes into contact with the projection 44N (see FIG. 3), Since the resistance when the cap 40 is inserted into the guide hole 31 can be reduced, there is an advantage that the deformation of the base 10 can be prevented, and the attached cap 40 cannot be easily removed.

Here, the guide hole 31 is shown at two places corresponding to the cap base engaging portion 44, but the guide hole 31 may be at two places or at three or more places. It is sufficient if the same number as the corresponding cap base engaging portions 4 4.

The cap 40 is provided with a cam contact portion 45, and the lens holding portion 50 is provided with a cam surface 52. The cam contact portion 45 protrudes inward from the inner surface of the cap 40. The cam surface 52 is provided on a part of the side surface 51 of the lens holding portion 50. The cam surface 52 is slidably contacted with the cam contact portion 45 so that the cap 40 can be moved relative to the base 10. The force applied as a movement acts in the direction of narrowing the distance between the separation portions 60, and the force to bend the optical portion 2 of the I〇L 1 on the lens stage 15 and between the lens holding portions 54. Is converted to Further, the cam surface 52 is formed into a smooth shape so that the bending speed of the IOL 1 can be controlled to some extent when the cap 40 rotates at a substantially constant angular speed.

In addition, a slide stop projection 36 is provided at a boundary between the guide introduction portion 32 and the guide narrow portion 33. As a result, the slide stopping projections 36 and the projections 44N interfere with each other, and the sliding of the cap 40 with respect to the base 10 can be stopped. In the distribution container according to the present embodiment, when the cap 40 is rotated counterclockwise while rotating the cap 40 counterclockwise, the cap 40 is bent with respect to the spread of the separation portion 60 of the lens gripping portion 54. In order to prevent the optical part 2 of IOL 1 from catching up and the IOL 1 from dropping off the lens gripper 54, the holding part fixed part 16 on the tongue on the base 10 has a cantilever shape. The notch 16a is provided at least at one or more places on the free end side of the holding portion fixing portion 16. Is formed. Also, there is a slight gap SP between the free end of the holding portion fixing portion 16 and the housing portion bottom surface 21. On the other hand, a holding portion fixing projection 52P is provided below the side surface 51 of the lens holding portion 50. That is, when the cap 40 is inserted into the base 10, the holding and stable engaging portion 46 contracts the lens holding portion 50, and the notch 16 a of the holding portion fixing portion 16 (first notch) is formed. The holding part fixing projections 52P are fitted. As a result, the lens gripper 54 is fixed to the base 10 with an interval capable of gripping the IOL 1. When the cap 40 is rotated counterclockwise, the cam contact portion 45 compresses the lens holding portion 50, the holding portion fixing protrusion 52 moves the free end of the holding portion fixing portion 16 and the bottom of the housing portion 2 Insert into the gap SP (2nd notch) between 1. In this case, the holding portion fixing projection 52 P cannot be disengaged from the gap SP even when the lens is rotated in the reverse direction, so that the lens holding portion 54 is kept narrow. This prevents .. IOL 1 from restoring to its original shape.

Further, the base 10 has a holding part housing part 20 for housing the lens holding part 50, and the holding part bottom face 21 of the holding part housing part 20 has a holding part engaged with the lens holding part 50. An engaging portion 23 is provided, and a claw-like projection of a base engaging portion 59 protruding downward from the lower surface of the lens holding portion 50 is engaged with the holding portion engaging portion 23. When the holding portion engaging portion 23 is formed into a tapered shape in which the front side that first comes into contact with the projection of the base engaging portion 59 is wide and the back side is narrow, the lens holding portion 50 holds the lens holding portion 50. Since the resistance at the time of insertion into the engaging portion 23 can be reduced, the deformation of the lens holding portion 50 and the base 10 can be prevented, and the attached lens holding portion 50 cannot be easily removed. There is an advantage.

Further, as another embodiment, one of the holding portion engaging portion 23 and the base engaging portion 59 is a claw-shaped protrusion protruding, and the other is engaged with the protrusion by receiving the protrusion. It may be in the form of matching. As a result, the base engaging portion 59 is held in place so that the lens holding portion 50 does not substantially come off with respect to the base 10. Slidably engaged with 23.

Further, a holding portion engaging portion 23 and a holding stabilizing pin 24 for determining and stabilizing the positions of the lens holding portion 50 are provided on the bottom surface 21 of the housing portion. Here, the holding section stabilizing pin 24 projects upwardly from the housing section bottom face 21 at a position and at a height such that the cam contact section 45 of the cap 40 does not interfere with the holding section stably engaging section 46. Is established. For this reason, the holding part stabilizing pin 24 serves as a guide for positioning the lens holding part 50 in the holding part holding part 20 of the base 10 and for preventing the optical part 2 of the IOL 1 from being displaced during bending. It functions and stabilizes the position of the lens holding section 50. Here, the number of the holding stabilizing pins 24 is preferably about 2 to 4 in order to stabilize the position of the lens holding portion 50, and it is preferable to provide them at positions where the insertion of the forceps is not hindered.

In addition, since the lens stage 15 has a through hole 15 P with an open top and bottom surface, viscoelastic substances used in the introduction and discharge of ethylene oxide gas and IOL 1 implantation can be injected. . Further, at least one groove 15G is provided at an upper portion of the lens stage 15. As described above, when the groove 15 G is provided in the lens stage 15, it becomes easy to insert forceps when taking out the IOL 1 without bending it. Here, the diameter of the lens stage is sufficiently larger than the outer diameter of the optical part 2 of the IOL 1 because the IOL 1 has a width that allows easy and stable arrangement, and the diameter of the through hole is the IOL 1 It is preferable that the diameter is sufficiently smaller than the outer diameter of the optical section 2.

Further, an arc-shaped opening 35 is formed in the vicinity of the guide introduction portion 32 concentrically with the guide introduction portion 32. Thus, when the opening 35 is provided, when the cap 40 is attached to the base 10, the vicinity of the guide introduction portion 32 of the base 10 elastically deforms, and the cap 40 is inserted into the guide introduction portion 32. The resistance of the base 10 can be reduced, so that deformation of the base 10 can be prevented. In order to increase the effect of the spring, the length of the opening 35 must be 1 It is preferably up to 3 times, more preferably 1.5 to 3 times. Further, the pair of lens holding portions 54 are integrally connected via an elastic spring frame 53 having an elastic spring structure. Here, since the elastic spring frame 53 has an elastic spring structure, the lens holding portion 50 is urged in a direction to widen the separation portion 60. As a result, when the cap 40 is engaged with the base 10, the introduction portion 46 a comes into contact with the side corners and the side surface 51 of the lens holding portion 50, and the space between the separation portions 60 is slightly reduced. In addition, it is possible to maintain the separated portion 60 at an interval at which the IOL 1 can be grasped.

Further, a pair of elastic spring frame receiving portions 25 is provided on the housing portion side surface 22 of the holding portion housing portion 20 so that a part of the elastic spring frame 53 of the lens holding portion 50 can be slid. By supporting, the lens holder 50 is substantially prevented from moving when the IOL 1 is bent. In the case of the present embodiment, a pair of elastic spring frame receiving portions 25 are provided on the side surface 22 of the holding portion housing portion 20 in a direction perpendicular to the bending direction of the optical portion 2 of the IOL 1. A part of the elastic spring frame 53 of the lens holding part 50 is fitted into the elastic spring frame receiving part 25 to slidably support a part of the elastic spring frame 53. Therefore, the rotation of the lens holding portion 50 is prevented. The elastic spring frame receiving portion 25 preferably has a thickness capable of preventing warpage in consideration of the resin used, the thickness at the time of molding, and the like.

Further, the lens holding portion 50 has a first engaging claw 57 at the tip of a support portion support column 55 protruding inward from the vicinity of the lens holding portion 54 to the separating portion 60, and a lens holding portion facing the lens holding portion 54. A second engaging claw 58 is provided at the tip of the supporting portion support column 55 positioned so as to face the first engaging claw 57 with the separating portion 60 therebetween in the vicinity of the portion 54. I have. As a result, when the separation portion 60 is narrowed, the first engaging claw 57 and the second engaging claw 58 are engaged with each other, so that the bent state of the I〇L 1 is maintained. Here, the first mating claw 5 7 and the second mating claw A recess 57 R is provided in a part of the support column 55 in order to facilitate elastic deformation of the support column 55 when the column 58 comes into contact with or in contact with the column 58. Here, the recess 57R may be provided on either the left or right side of the support column 55.

In the case of the present embodiment, the support portion support rib 56 is provided on the upper surface of the support portion support column 55. When the support ribs 56 are provided on the base end side of the support pillars 55, the interference between the first and second engaging claws 57 and 58 in the vertical direction is improved. This makes the rotation of the cap 40 smooth, and also makes it easier to insert forceps when removing the IOL 1 without bending it. Also, in the case of the present embodiment, since two support portion support ribs 56 are provided, and the support portion 3 of the IOL 1 is accommodated between the two support portion support ribs 56, the rotation of the IOL 1 is performed. Can be prevented. This ensures that the IOL 1 is bent at the desired position. Further, as another embodiment, by providing the support portion support rib 56 on the upper surface of the first engaging claw 57, the support portion 3 of the IOL 1 is locked by the support portion support rib 56.

The inner shape of the lens gripping portion 54 in the present embodiment is a taper shape that spreads in the direction of the separation portion 60, and the end portion is chamfered into an R shape. Therefore, the optical section 2 of the IOL 1 is not damaged when the IOL 1 is bent and the IOL 1 is taken out with forceps.

The spacing 60 between the lens grips 54 is an opening in which the distance between the ends of the lens grips 54 is substantially the same as or slightly smaller than the outer diameter of the optical unit of the IOL 1, and the other lens The distance between the side surfaces 5 4 b of the gripping portions 54 is substantially equal to or slightly larger than the outer diameter of the optical portion 2 of I〇L 1, so that IOL 1 is the lens gripping portion 5. It is configured so that it can be easily placed between the four.

The side surface 54b has a tendency for the IOL 1 to bend downward if the curvature of the outer surface of the IOL 1 is larger than the curvature of the inner surface when the IOL 1 is bent. It has an angle of inclination that always bends upward. The inclination angle ι6 of the upper surface 54a is preferably 5 to 35 degrees, and more preferably 15 to 25 degrees. The inclination angle of the side surface 54b is preferably 0 to 30 degrees, and more preferably 5 to 15 degrees.

In another embodiment, the lens holding portion 54 can be formed in a groove shape. In this case, the IOL 1 can be grasped without projecting the lens stage 15 on the base 10.

The cross section of the lens gripper 54 is formed in a tapered shape with a gentle taper on both the upper surface 54c and the lower surface 54d. However, IOL 1 does not jump out of the lens grip. That is, the optical part 2 of I 0 L 1 is certainly bent. Generally, the inclination angle a of the lower surface 54d is preferably about 0 to 7 degrees, more preferably about 5 degrees. In the case of a biconvex lens, it is more preferable that the gradient of the tangent of the curved surface of the optical section 2 of the IOL 1 near the portion where the optical section 2 of the IOL 1 is in contact with the lower surface 54 d of the lens holding section 54 is more preferable. On the other hand, the inclination angle δ of the upper surface 54c is preferably 5 to 35 degrees, more preferably 15 to 25 degrees. The outer shape of the cap 40 as viewed from the plane is substantially circular, but the outer shape is not limited to a circular shape, and may be a square, a hexagon, an octagon, or the like, so long as the cap 40 can be easily rotated. There is no particular limitation. Note that the cap 40 is not limited to the movement of rotating and sliding with respect to the base 10. That is, the sliding of the cap 40 with respect to the base 10 in the present invention is not necessarily limited to the movement caused by rotation. Instead, it may constitute other movements such as a linear movement.

Further, a plurality of knurl-shaped irregularities 47 are formed on the outer periphery of the cap side surface 42. The knurled unevenness 47 functions as a non-slip when the cap 40 is gripped and rotated by hand. Knurled knurls 4 7 corners If the cap 40 is chamfered into an R shape, the feel when the cap 40 is gripped by hand can be reduced.

In the distribution container of the present embodiment, if a window W through which the I〇L 1 accommodated in the distribution container is visible from the outside is provided substantially at the center of the upper surface of the cap 40, the IOL 1 It can be checked from the outside of the cap 40 whether or not is stored in a desired position and whether or not is bent. The size of the window W may be any size as long as the state of the IOL 1 accommodated in the distribution container can be confirmed, and a size larger than the diameter of the optical unit 2 of the IOL 1 is preferably employed, but is particularly limited. Not done. Note that the window W in the present invention is not limited to an open structure, and in the case where the material of the cap 40 is made of a transparent material or is made of a translucent material, It also includes a configuration in which the upper surface of the cap 40 is made thin so as to be visible from the outside, and a configuration in which a transparent film is stuck to an opening formed in the upper surface of the cap 40. Further, by providing the window W with a lens function, the IOL 1 accommodated in the distribution container can be viewed in an enlarged manner. The lens function can be realized by, for example, a biconvex lens, a plano-convex lens, a frennel lens shape, or the like, but is not limited thereto.

The cap 40 may be provided with an inlet capable of attaching a viscoelastic substance to the IOL 1 housed in the distribution container. The inlet may be located at the above-mentioned window W or at a different position from the window W, and may be provided near the window W on the upper surface of the cap 40 or at an arbitrary position on the side surface of the cap 40. it can. Providing the injection port in this way allows the viscoelastic substance to adhere to the upper surface of I〇L 1 contained in the distribution container, thus making it possible to carry out IOL 1 implantation more advantageously. .

The base 10 includes a label space 14 as necessary. label The space 14 constitutes a part of the base 10 on the side of the holding portion accommodating portion 20, and the name and standard (lens power) of the IOL 1 accommodated in the distribution container of the present invention. , Lens diameter, etc.).

Further, providing the rotation end mark M on the cap 40 and the base 10 has an advantage that bending can be confirmed. As another embodiment, a rotation direction indicating mark Ma indicating the rotation direction of the cap may be provided.

In the case of the present embodiment, after the IOL 1 is disposed on the lens stage 15 and between the lens holding portions 54, the cap 40 is attached to the base 10, and the cap base of the cap 40 is fixed. When the joint portion 44 is fitted into the guide introduction portion 32, the cap base engagement portion 44 slides into engagement with the guide introduction portion 32, and the cap base engagement portion 44 slides. Since the sliding is restrained by the restraining protrusion 36, the cap 40 is mounted so as not to rotate easily. At the same time, the introduction section 46a comes into contact with the lens holding section 50, and the separation section 60 is slightly narrowed. For this reason, the separation portion 60 is set at a distance such that the IOL 1 disposed on the lens holding portion 54 is not pressed and the IOL 1 does not easily fall off the lens holding portion 54. That is, according to the distribution container of the present invention, IOL 1 is stably held without being pressed during distribution.

Then, the cap base engaging portion 4 4 is slid over the slide stopping protrusion 36, and the cap base engaging portion 4 4 is slid from the guide introducing portion 3 2 to the guide narrow portion 3 3. The contact portion 45 slidably abuts the cam surface 52, whereby the force applied as a relative movement of the cap 40 to the base 10 acts in a direction to reduce the distance between the separation portions 60. It is converted into a force to bend the optical part 2 of the IOL 1 and acts in a direction to reduce the distance between the separation parts 60, and is disposed on the lens stage 15 and between the lens holding parts 54. 1 is folded. Further, when the cap base engaging portion 44 is slid to the wide guide portion 34, the pair of the first engaging claws 57 and the second engaging claws 58 opposed to each other on the lens holding portion are moved. They will engage and engage. As a result, even after the cap 40 is removed from the base 10, the state in which the distance between the separation parts 60 is narrowed, that is, the state in which the optical part of the IOL 1 is completely bent is maintained. . By picking it out with forceps or the like, I〇L1 can be easily taken out in a folded state and can be implanted directly into the eye.

The guide introduction section 32, the guide narrow section 33, the guide wide section 34, and the sliding stop projection 36 are held by the lens holding section 50 by the movement of the cap 40 with respect to the base 10. It is configured as a guide hole 31 for bending the IOL 1, but the other guide narrow part 33 a, wide guide part 34 a and sliding stop projection 36 a opposite to each other By moving the cap base engaging portion 44 over the sliding stop projection 36a and moving it to the wide portion 34a. Without bending the IOL 1 held by the lens holding portion 50, Cap 40 can be removed from base 10. Therefore, the surgeon himself or his assistant can arbitrarily bend by using a forceps injector or the like separately.

In the case of the present embodiment, as a material of the base 10, the cap 40, and the lens holding portion 50, for example, a thermoplastic resin that can be generally molded into a mold, such as polypropylene, polyethylene, or polystyrene, may be used.

Further, if there is a relationship expressed by the following equation between the lens stage 15, the separation section 60 and the diameter of the optical section 2 of the IOL 1, the IOL 1 can be arranged without difficulty in the lens holding section 54.

I O L 1 optics 2 diameter ≤ S 1 + S 2

When the lens holding portion 54 is formed in a groove shape, the interval S 3 is set to IOL 1 It is only necessary that the diameter is sufficiently smaller than the diameter of the optical part 2 of the optical element. Here, if S3 is larger than the diameter of the optical unit 2 of the IOL 1, the IOL 1 cannot be held between the lens holding units 54.

In the case of (the diameter of the optical part 2 of IOL 1 ≤ S 1 + S 2) and (the diameter of the optical part 2 of I〇L 1 ≥ S 1), the lens is tilted while the optical part 2 of the IOL 1 is tilted. When inserted into the grip 54, I〇L 1 can be arranged on the lens grip 54.

If the diameter of the optical part 2 of I OL 1 is smaller than the distance S 1, I 0 L 1 can be easily placed on the lens grip 54, but the diameter of the optical part 2 of the distance S 1 and I OL 1 If the difference between the two is too large, it is not preferable because the IOL 1 easily falls off from the lens holding portion 54 during distribution. Therefore, the difference between the distance S 1 and the diameter of the optical section 2 at I〇L 1 is 2 mm or less .. Preferably, it is 1 mm or less. The interval S 1 is used to prevent the risk of the I〇L 1 jumping out or falling off during the placement of the IOL 1, the assembly of the cap 40 to the base 10, during distribution, or during bending, etc. It is preferable that (the diameter of the optical section 2 of IOL 1 ≤S 1 + S 2) and that the diameter is substantially the same as or slightly smaller than the diameter of the optical section 2 of IOL 1.

The interval S2 is 3 mm or less, preferably 1 mm or less, and more preferably 0.6 mm or less, in consideration of the ease of arrangement of the I 1L 1 and the retention.

Also, after placing the IOL 1 on the lens grip 54 and assembling the cap 40 with the base 10, the outer circumference of the lens 2 of the IOL 1 and the lens grip 54 in the diameter direction of the optical section 2 of the I〇L 1 Taking into account the ease of arrangement of IOL1, the retention, and the like, the gap is 1 mm or less, preferably 0.5 mm or less, and more preferably 0.2 mm.

Regarding the distribution container according to the present embodiment, it is disclosed in the embodiment. Obviously, obvious variations, modifications, or alterations that can be made by those skilled in the art are included in the present invention. Industrial applicability

According to the present invention, it is possible to provide an I〇L distribution container in which the I 流通 L can be easily placed on the lens stage and in the lens holding portion, and it is stable even after the IOL is placed on the lens stage and in the lens holding portion. By simply providing the IOL distribution container that can hold the IOL, and selecting the rotation direction of the cap, the IOL can be easily, safely, and reliably folded in two at the desired center. It is possible to provide an IOL distribution container that can be taken out in a folded state or taken out without being bent. In addition, when the IOL is bent, the IOL is not exposed immediately, and the unfolded IOL can be kept unexposed until just before picking up the bent IOL with forceps or the like. It is possible to provide an IOL distribution container capable of preventing pollution as much as possible.

Claims

Scope of Word

1. An intraocular lens including a base having a lens stage, a cap, and a lens holding unit having a pair of lens holding units, wherein the lens holding unit is arranged on the base with an interval capable of holding the intraocular lens. Wherein the pair of lens gripping portions are disposed so as to face each other via a separating portion that separates the intraocular lens by an interval at which the intraocular lens can be gripped, and are held inward from the inner surface of the cap. A stable engaging portion is protruded, and the leading end of the holding stable engaging portion is chamfered to define an introduction portion, and an intraocular lens is disposed on the lens stage and between the lens holding portions. After that, when the cap is attached to the base, the introduction portion comes into contact with the lens holding portion, and the interval between the separation portions is slightly narrowed. Distribution container characterized by comprising been held without disposed between lens gripper intraocular lens without being squeezed, and substantially off from the lens grip portion.

2. A base having a guide hole, a cap having a cap base engaging portion, and a lens holding portion, and piercing the cap base engaging portion so as to engage with a claw-shaped projection. A guide hole provided so that the cap can be slidably engaged with the base, and the guide hole is engaged by fitting the projection into the guide hole. A guide introduction portion configured to allow the cap to be attached to the base so as not to come off, and the projection to be slidable without coming off from the guide hole, and the cap to slide on the base. And at least one guide wide portion having a width that allows the protrusion to be disengaged from the guide hole. The distribution container according to paragraph 1 of the above.

3. The cap has a cam contact portion, the lens holding portion has a cam surface, the cam contact portion is protruded inward from an inner surface of the cap, and the cam surface is a side surface of the lens holding portion. The lens is provided in a part thereof, and slidably abuts the force contact portion, whereby a force applied as a relative movement of the cap with respect to the base acts in a direction to reduce a distance between the separation portions, and the lens described above. 3. The distribution container according to claim 1, wherein the force is converted into a force to bend an optical part of an intraocular lens disposed on a stage and between the lens holding parts.

4. A slide stop projection is provided at a boundary between the guide introduction portion and the guide narrow portion of the guide hole, and the slide of the cap with respect to the base can be stopped by interfering with the protrusion. 4. A distribution container for an intraocular lens according to claim 2, wherein the container is an intraocular lens.

5. At both ends of the guide introduction portion, the slide stop projections are provided with the narrow guide portion and the wide guide portion. When the cap is slid in one direction with respect to the base, the intraocular lens is bent, 5. The intraocular lens distribution container according to claim 2, wherein the intraocular lens does not bend when sliding in the opposite direction.

6. The base is provided with a holding portion fixing portion, the lens holding portion is provided with a holding portion fixing protrusion, and the space between the separation portions is kept narrow to prevent the bent intraocular lens from being restored. 6. The distribution container according to claim 1, wherein the holding portion fixing protrusion engages with the holding portion fixing portion.

7. A holding portion engaging portion that engages with the lens holding portion of the base, and a claw-shaped protrusion protruding from the base engaging portion of the lens holding portion, wherein the base engaging portion is Claims 1, 2, 3, 4, 5, or 6 characterized by being slidably engaged with the holding section engaging section. Distribution container.

8. A holding portion housing portion for housing the lens holding portion is defined on the base, and a protrusion is provided on the bottom surface of the housing portion of the holding portion housing portion to determine a position of the lens holding portion and hold for stabilization. 8. The distribution container according to claim 1, wherein the distribution container is provided with a stabilizing pin.

9. Claims 1, 2, 3, 3, 4, 5, 6, and 7 wherein a through-hole is formed in the lens stage, the top and bottom of which are open. Or the distribution container according to paragraph 8.

10. Claim 1, Claim 2, Clause 3, Clause 4, Clause 5, Clause 6, Clause 7, Clause 8, wherein at least one groove is provided on the upper part of the lens stage Or a distribution container for an intraocular lens according to item 9.

11. An opening is formed in the vicinity of the guide introduction portion, wherein the opening is drilled in the vicinity of the guide introduction portion. A distribution container according to paragraph 9, 9 or 10.

12. The pair of lens grips are connected to each other via an elastic spring frame having an elastic spring structure, and the elastic spring frame urges in the direction in which the separated portion is to be expanded. Claims 1, 2, 3, 3, 4, 5, 6, 7, 8, 9, 10, or 11 The described distribution container.

13. A first mating claw at a tip of a support portion supporting column protruding inward from the separation portion from near the one lens grip portion of the pair of lens grip portions; A second engaging claw is provided at a tip of a supporting portion support column positioned so as to face the first engaging claw with the separating portion interposed therebetween in the vicinity, and the first engaging claw and the second engaging claw are provided. (2) Engagement with the interlocking claw, the separated portion is held in a narrowed state, and the state where the intraocular lens is bent is maintained Claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 9 Distribution container according to Paragraph 0, Paragraph 11 or Paragraph 12.

14. The support according to claim 13, further comprising a support portion support rib protruding upward on an upper surface of the support portion support column, wherein the support portion of the intraocular lens is sandwiched between the support portion support ribs. Distribution container.

15. A window is provided at a substantially central portion of the upper surface of the cap, wherein the window is provided in claim 1, 2, 3, 4, 5, 6, or 7. A distribution container according to paragraph 7, 8, 9, 9, 10, 11, 12, 12, 13 or 14.

16. A distribution container for an intraocular lens, comprising: a base, a cap, and a lens holding portion having a pair of lens holding portions, wherein the lens holding portion is arranged on the base with an interval capable of holding the intraocular lens. Wherein the pair of lens gripping portions are arranged so as to face each other via a spacing portion that separates the intraocular lens by an interval at which the intraocular lens can be gripped, and the holding and stabilizing engagement portion is inward from an inner surface of the cap. When the cap is attached to the base after the intraocular lens is disposed between the lens gripping portions, the introduction portion is defined by chamfering the tip of the holding and stable engaging portion. In addition, the introduction portion contacts the lens holding portion so that the interval between the separation portions is slightly reduced, and the intraocular lens disposed between the lens holding portions is not pressed, and the lens holding portion is not pressed. A distribution container characterized by being held without substantially falling off the holding part.