JP2014218255A - Lens holding member and contact lens packing container using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens holding member with new structure capable of effectively preventing deformation of a contact lens in a distribution process, and more certainly taking out the contact lens from the front surface side of the lens in taking out, and a contact lens packing container using the same.SOLUTION: In a lens holding member 10 to be arranged in a lens distribution case of a contact lens packing container, a formation part of a recessed inner surface 34 of a projected inner surface 22 and the recessed inner surface 34 defining a lens holding region is provided with a through-hole 36 to permit drift of preservation liquid inside and outside the lens holding region, and on the other hand, the projected inner surface 22 provides a holding surface having a curvature radius larger than that of a rear surface of a contact lens and facing the rear surface in a region of 95% or more of the whole including an edge part of the contact lens.

Description

  The present invention relates to a lens holding member that is accommodated in a distribution case used when distributing a contact lens and holds the contact lens, and a contact lens packaging container using the lens holding member.

  Contact lenses are distributed in a sealed state accommodated in a distribution case. In particular, a hydrous soft contact lens or the like is generally distributed in a distribution case together with a storage solution. As such a distribution case, conventionally, a blister package described in Japanese Patent Laid-Open No. 7-322911 (Patent Document 1) and US Pat. No. 4,691,820 (Patent Document 2) has been adopted. The blister package has a structure in which a storage solution and a contact lens are accommodated in a container body having a certain degree of strength and sealed with a cover film.

  By the way, a contact lens is mechanically weak, and even a slight distortion may change the optical characteristics and affect the quality. Therefore, it is necessary to provide the user with no deformation or distortion. However, in the blister package described in Patent Document 1 and Patent Document 2, the contact lens is merely housed in a state in which the contact lens can be freely displaced in the housing area of the container body, and the contact lens is free due to vibration during transportation. The contact lens may be deformed when the front and back are reversed or attached to the cover film side in a folded state.

  Therefore, the present applicant has proposed a lens holding member that holds a contact lens and is accommodated in a distribution case in Japanese Patent No. 4520532 (Patent Document 3). The lens holding member includes a lid member having a concave inner surface and a main body member having a convex inner surface, and the lens is accommodated between the concave inner surface and the convex inner surface by overlapping the lid member and the main body member. The structure forms a region. According to such a lens holding member, the contact lens is accommodated in the lens accommodation region, thereby restricting excessive displacement of the contact lens in the accommodation region and maintaining the desired shape of the contact lens. Can be protected from external force and distributed.

  However, in the lens holding member of Patent Document 3, when the lid member is opened from the main body member, there is a high probability that the contact lens is attached to the lid member side. When the contact lens is attached to the concave inner surface side of the lid member, the lens is taken out from the rear surface side of the concave lens, and there is a high possibility that the fingertip directly touches the rear surface of the lens. Since the rear surface of the contact lens is a surface superimposed on the cornea when worn, it is preferable from a hygienic viewpoint that contact with the fingertip is avoided as much as possible. Also, if the lens is attached to the lid member side, the front and rear direction of the lens must be reversed on the hand in order to point the rear surface of the taken out lens to the eyeball side, which takes time and effort. There is also a problem. Therefore, the lens holding member of Patent Document 3 still has room for improvement.

JP-A-7-322911 US Pat. No. 4,691,820 Japanese Patent No. 4520532

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is that it is possible to effectively prevent deformation of the contact lens in the distribution process, and more reliably in front of the lens when taking it out. A lens holding member having a novel structure that can be taken out from the side, and a contact lens packaging container using the same.

  Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible.

  A first aspect of the present invention relating to a lens holding member is a lens holding member that is disposed in a lens distribution case filled with a preservative solution and that accommodates and holds a contact lens, and has a spherical crown-shaped convex inner surface. The holding portion and the second holding portion having a spherical crown-shaped concave inner surface are overlapped with each other, so that a lens holding region is defined between the convex inner surface and the concave inner surface, and the second A through hole is provided in a portion where the concave inner surface of the holding part is formed, and the flow of the storage solution through the through hole is allowed inside and outside the lens holding region, while the convex inner surface of the first holding part Has a larger radius of curvature than the rear surface of the contact lens and provides a holding surface facing the rear surface in an area of 95% or more of the entire region including the edge portion of the contact lens. And

  In the lens holding member according to the present invention, a lens holding region having a shape close to a contact lens is defined between the opposing surfaces of the convex inner surface of the first holding portion and the concave inner surface of the second holding portion. Thereby, the displacement of the contact lens can be suppressed, and the desired shape of the contact lens can be stably held in the lens distribution case in which the lens holding member is accommodated. Then, by sandwiching the contact lens between the first holding part and the second holding part, it is possible to protect against a strong hit or an external force in the lens distribution case. As a result, deformation of the contact lens can be suppressed, and the desired shape can be maintained more reliably.

  Furthermore, the concave inner surface is provided with a through hole, and the flow of the preservation solution is allowed through the through hole. As a result, when the first holding part and the second holding part are opened when the lens is taken out, the surface tension of the preserving liquid existing between the concave inner surface and the lens front surface causes the flow of the preserving liquid through the through hole. It is canceled with. On the other hand, the radius of curvature of the convex inner surface is made larger than the rear surface of the contact lens, and a gap is formed between the rear surface of the lens and the convex inner surface. As a result, the storage liquid can be accommodated in the gap between the lens rear surface and the convex inner surface, and the contact lens can be adsorbed on the convex inner surface based on the surface tension and atmospheric pressure of the storage liquid. The convex inner surface provides a holding surface facing the lens rear surface in the region including the edge portion of the contact lens. Therefore, there is no hole or the like on the convex inner surface facing at least the edge portion, and a holding surface facing the rear surface of the lens is provided. Thereby, the outflow of the preservation | save liquid from between an edge part and a convex inner surface can be reduced. At the same time, the convex inner surface provides a holding surface facing the rear surface of the lens in an area of 95% or more of the entire contact lens. Therefore, the convex inner surface is a small hole that has a hole area of less than 5% of the lens rear surface of the contact lens, even if a hole or the like is not formed over the entire surface. It is opened without hanging. By adopting such a convex inner surface with a specific shape, the preservation solution can be effectively held in the gap between the rear surface of the lens and the convex inner surface, and the adsorption force based on the surface tension of the preservation solution can be made more effective. Can be obtained. As a result, when the lens holding member is opened, the attractive force on the convex inner surface can be superior to the attractive force on the concave inner surface of the contact lens. Can be attached.

  The contact lens attached to the convex inner surface is placed on the convex inner surface with the lens front side exposed. Subsequently, when the contact lens is taken out, the front surface of the lens is pressed with a fingertip to crush the gap between the rear surface of the lens and the convex inner surface, and the edge portion of the contact lens is lifted from the convex inner surface, thereby The storage solution is discharged to the outside through a gap between the edge portion of the contact lens and the convex inner surface. Thereby, the surface tension of the preservation solution can be reduced or eliminated, and the contact lens can be removed from the convex inner surface. And since the contact lens can be taken out from the front side of the lens, the chances of the fingertip touching the rear surface of the lens can be reduced, the hygiene can be improved, and the fingertip is attached to the front surface of the lens and used as it is. It is possible to improve the handleability of the lens.

  The second aspect of the present invention relating to the lens holding member is the one described in the first aspect relating to the lens holding member, wherein the convex inner surface of the first holding part is disposed over the entire region facing the contact lens. It has a smooth surface shape.

  The smooth surface shape in this aspect refers to a surface shape having no irregularities and having no opening hole. By forming the convex inner surface without a hole, it is possible to provide a holding surface facing the entire area of the rear surface of the lens, and to ensure the surface tension of the preservation solution more effectively. Furthermore, by smoothing the convex inner surface, it is possible to more stably obtain the surface tension of the storage solution accommodated in the gap between the convex inner surface and the rear surface of the lens. The surface roughness of the convex inner surface is preferably set to Ra 25.0 μm or less, more preferably Ra 6.3 μm or less.

  A third aspect of the present invention relating to the lens holding member is the one described in the first or second aspect relating to the lens holding member, wherein the formation area of the concave inner surface of the second holding portion is a porous structure. It is what.

  According to this aspect, since the plurality of holes are provided on the concave inner surface, even when the contact lens partially overlaps the concave inner surface, it is possible to avoid blocking all the holes. . As a result, the fluidity of the preservative solution between the lens front surface and the concave inner surface can be secured by any of the holes, and the surface tension between the lens front surface and the concave inner surface can be more reliably broken. I can do it. As a result, adhesion of the contact lens to the concave inner surface side can be more reliably prevented.

  According to a fourth aspect of the present invention relating to the lens holding member, in the one according to any one of the first to third aspects relating to the lens holding member, in the contact lens housed in the lens holding region, Movement in the optical axis direction between the opposing surfaces of the convex inner surface of one holding portion and the concave inner surface of the second holding portion is allowed without contact deformation. .

  In this aspect, a margin is set with respect to the contact lens in the lens holding region. Thereby, in the lens accommodation state in the lens holding region, it is possible to avoid generation of excessive stress on the lens, and it is possible to prevent residual distortion when taken out from the lens holding member.

  A fifth aspect of the present invention relating to a lens holding member is the one described in any one of the first to fourth aspects relating to a lens holding member, wherein the concave inner surface of the second holding portion is the contact lens. It has a larger radius of curvature than the front surface.

  According to this aspect, even when the front surface of the contact lens is in contact with the concave inner surface, the contact area between the lens front surface and the concave inner surface can be reduced, and storage can be performed between the lens front surface and the concave inner surface. It is possible to prevent the formation of a closed gap for containing the liquid. Thereby, the surface tension of the preservation | save liquid produced between a lens front surface and a concave inner surface can be reduced more, and adhesion to the concave inner surface side of a contact lens can be prevented more effectively.

  The sixth aspect of the present invention relating to the lens holding member is the one described in any one of the first to fifth aspects relating to the lens holding member, and the formation area of the convex inner surface in the first holding portion; The formation area of the concave inner surface in the second holding part is an inverted bowl-shaped wall part that opens downward.

  According to this aspect, the first holding part and the second holding part can be formed with a plate structure having a substantially constant thickness dimension. As a result, it is possible to reduce the size and weight of the lens holding member and to reduce the formation material.

  A seventh aspect of the present invention relating to the lens holding member is the one described in any one of the first to sixth aspects relating to the lens holding member, wherein the first holding part and the second holding part are mutually It is configured integrally so that it can be bent.

  In this aspect, since the 1st holding | maintenance part and the 2nd holding | maintenance part are connected, a 1st holding | maintenance part and a 2nd holding | maintenance part do not isolate | separate, but a handleability can be improved. In addition, the 1st holding | maintenance part in this aspect and the 2nd holding | maintenance part may be made into an integrally molded product, and may be comprised integrally by engagement structure, welding, adhesion | attachment, etc. after carrying out separate shaping | molding. good.

  An eighth aspect of the present invention relating to the lens holding member is the one described in any one of the first to seventh aspects relating to the lens holding member, wherein the first holding part and the second holding part are Engagement means for holding the lens holding region in an overlapping state is provided.

  According to this aspect, the first holding portion and the second holding portion can be held in an overlapped state with the lens holding member alone, and the contact can be made without providing a special structure in the lens distribution case that houses the lens holding member. The accommodation state of the lens can be maintained. Thereby, a lens holding member can be used for a more various lens distribution case.

  A feature of the first aspect of the present invention relating to the contact lens packaging container is that the lens holding member according to any one of the first to eighth aspects relating to the lens holding member is filled with a storage solution. The contact lens packaging container is accommodated in a distribution case, and contact lenses are accommodated and held in the lens holding region of the lens holding member.

  According to the contact lens packaging container of the present invention, the contact lens is housed in the lens distribution case in a protected state by the lens holding member, so that the contact lens is protected from various vibrations and impacts during transportation. I can do it. Thereby, damage or deformation of the contact lens in the distribution process can be suppressed, and the target lens shape can be more reliably protected and provided to the end user. Further, since the lens holding member is provided with a through hole in the second holding portion, the storage solution enters the lens holding region through the through hole, and the stored contact lens is stored in a state of being immersed in the storage solution. I can do it. The lens distribution case may be, for example, a blister package or the like, or may be an easily deformable one formed by bonding a flexible sheet. According to the present invention, since the contact lens can be protected by the lens holding member, the contact lens can be prevented from being deformed even if the lens distribution case is easily deformed. The contact lens packaging container of the present invention includes a contact lens held by a lens holding member.

  A second aspect of the present invention relating to a contact lens packaging container is the one described in the first aspect relating to a contact lens packaging container, wherein the lens holding defined by the first holding part and the second holding part. The contact lens that has been surface-treated in advance by plasma processing for the region is accommodated.

  In this aspect, since the plasma processing is performed in advance on the contact lens accommodated in the lens holding member, it is not necessary to perform the plasma processing after accommodation in the lens holding member. Therefore, the convex inner surface defining the lens holding region can be a surface having no hole or a small hole, and the holding surface facing the contact lens can be formed large. Accordingly, the contact lens can be effectively attached to the convex inner surface, and the contact lens can be reliably attached to the convex inner surface side when the lens holding member is opened.

  According to a third aspect of the present invention relating to a contact lens packaging container, in the first or second aspect relating to the contact lens packaging container, the lens is disposed between the overlapping surfaces of the first sheet and the second sheet. A holding member is disposed by overlapping the first holding portion and the second holding portion, and the first sheet and the second sheet are brought into close contact with each other in a sealing region that surrounds the outer periphery of the lens holding member. The lens distribution case is configured.

  In this aspect, the lens distribution case formed by the first sheet and the second sheet can be compactly formed by placing the first sheet and the second sheet along the lens holding member. Thereby, in particular, a large number of lenses can be accommodated in the lens distribution case and used suitably as a lens distribution case of a disposable lens provided collectively. Further, since the lens distribution case can be made compact, it is possible to reduce the amount of the storage solution stored in the lens distribution case.

  A fourth aspect of the present invention relating to a contact lens packaging container is the one described in the third aspect relating to a contact lens packaging container, wherein at least one of the first sheet and the second sheet is a thermoplastic synthetic resin on a metal foil. It is a laminate material in which films are laminated.

  According to this aspect, by adopting a laminate material for at least one of the first sheet or the second sheet, it is possible to reduce the thickness and weight of the contact lens packaging container while ensuring a high gas barrier performance and an evaporation preventing performance of the storage liquid. Softening can be further improved.

  A fifth aspect of the present invention relating to a contact lens packaging container is the one described in the third or fourth aspect relating to a contact lens packaging container, wherein the first sheet is superimposed on the first holding part, The second sheet is superposed on the second holding part, and only the first holding part of the first holding part and the second holding part is fixed to the first sheet.

  In this aspect, only the first holding part on which the convex inner surface is formed is fixed to the first sheet, and the second holding part on which the concave inner surface is formed is not fixed to the second sheet. Therefore, when the first sheet and the second sheet are opened, the second holding portion does not follow the second sheet, and the lens holding member is maintained in the closed state. Thereby, it is necessary to open the lens holding member again after the sheet is opened, and in this case, the user turns the second holding portion upward. As a result, the first holding part on which the convex inner surface is formed can be positioned on the lower side, and the contact lens is more likely to be located on the convex inner surface side with the action of gravity along with the surface tension and atmospheric pressure of the preservation solution. Can be attached. In addition, since the second holding portion is not fixed to the second sheet, opening the sheet leaves the lens holding member in a closed state, and allows the storage solution in the lens holding area to pass through the second holding member. It can be discharged from the hole. Thereby, before opening a lens holding member, the preservation | save liquid between a concave inner surface and a contact lens can be excluded, and the attractive_force | adsorptive_power on the convex inner surface side can also be enlarged relatively. In this way, the contact lens is removed by following a two-step procedure of opening the lens distribution case formed of the first sheet and the second sheet and opening the lens holding member. It can be more reliably adhered to the convex inner surface side, and subsequent lens removal and wearing can be made smooth.

  A sixth aspect of the present invention relating to a contact lens packaging container is the one described in the third or fourth aspect relating to a contact lens packaging container, wherein the first sheet is overlapped and fixed to the first holding portion. In addition, the second sheet is superposed and fixed on the second holding portion.

  In this embodiment, the first holding part and the second holding part are fixed to the first sheet and the second sheet, respectively. Thereby, by opening the first sheet and the second sheet, the lens holding member can be opened simultaneously with the opening of the lens distribution case by causing the first holding part and the second holding part of the lens holding member to follow.

  In the present invention relating to the lens holding member, the contact lens is protected by housing the contact lens in a lens holding region defined by the convex inner surface of the first holding portion and the concave inner surface of the second holding portion. I can do it. When opening the lens holding member, the preserving liquid between the concave inner surface and the lens is discharged through the through hole formed in the concave inner surface, and the gap between the holding surface of the convex inner surface and the rear surface of the lens is discharged. By securing a large amount of the preservative solution, it is possible to relatively increase the adsorption force to the convex inner surface side based on the surface tension of the preservative solution, and to attach the contact lens to the convex inner surface side. As a result, the contact lens can be taken out from the front side of the lens, the chances of the fingertip touching the rear surface of the lens can be reduced, the hygiene can be improved, and the lens can be taken out smoothly.

  In the present invention relating to the contact lens packaging container, the contact lens is held by the lens holding member as described above and accommodated in the lens distribution case, so that the deformation of the contact lens in the distribution process can be prevented. It is possible to provide the final user with the lens shape more reliably maintained. Furthermore, by allowing the storage liquid to enter the lens holding member through the through holes provided in the lens holding member, the contact lens can be stored in a state of being immersed in the storage liquid, and when removing the lens, the contact lens is removed. It can be taken out from the front side of the lens more reliably, and can be worn hygienically and smoothly.

The perspective view of the open state of the lens holding member in 1st embodiment of this invention regarding a lens holding member. The perspective view of the closed state of the lens holding member shown in FIG. The top view of the open state of the lens holding member shown in FIG. IV-IV sectional drawing in FIG. FIG. 2 is a cross-sectional view of the lens holding member shown in FIG. 1 in a closed state. Explanatory drawing for demonstrating the plasma processing to a contact lens. The perspective view of the open state of the contact lens packaging container in 1st embodiment of this invention regarding a contact lens packaging container. The top view of the closed state of the contact lens packaging container shown in FIG. IX-IX sectional drawing in FIG. Explanatory drawing for demonstrating the filling method of the preservation | save liquid to the contact lens packaging container shown in FIG. The perspective view of the state which opened only the lens distribution case of the contact lens packaging container shown in FIG. Explanatory drawing for demonstrating the lens holding member at the time of lens distribution case opening. Explanatory drawing for demonstrating the taking-out method of the contact lens from a lens holding member. The perspective view of the open state of the contact lens packaging container in 2nd embodiment of this invention regarding a contact lens packaging container. The perspective view of the open state of the lens holding member in 2nd embodiment of this invention regarding a lens holding member. The perspective view of the closed state of the lens holding member in 3rd embodiment of this invention regarding a lens holding member. The perspective view of the open state of the lens holding member shown in FIG. FIG. 17 is a cross-sectional view of a main part of the lens holding member shown in FIG. 16. The upper side figure of the open state of the lens holding member in 4th embodiment of this invention regarding a lens holding member. The upper side figure of the open state of the lens holding member in 5th embodiment of this invention regarding a lens holding member. The top view which shows each test body used in order to confirm the effectiveness of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, the lens holding member 10 as 1st embodiment of this invention is shown in FIGS. The lens holding member 10 is an integrally molded product in which a main body side plate 12 as a first holding portion and a lid side plate 14 as a second holding portion are connected by a hinge portion 16 so as to be opened and closed. . The closed state of the lens holding member 10 refers to a state where the main body side plate 12 and the lid side plate 14 are overlapped (the state shown in FIG. 2), and the open state of the lens holding member 10 refers to the main body side plate 12. And the state where the overlapping of the lid side plate 14 is released (the state shown in FIG. 1). In the following description, the vertical direction refers to the vertical direction in FIG. 4 that is the vertical direction in the open state.

  At the center of the main body side plate 12, a lens support portion 18 is provided which is formed by a wall portion having an inverted bowl shape or a reverse circular bowl shape opening downward. A flat plate-shaped main body side flange portion 20 that extends to the outer peripheral side over the entire circumference of the lens support portion 18 is formed at the opening peripheral edge portion of the lower end of the lens support portion 18. And the convex side surface of the lens support part 18 is made into the convex inner surface 22 which has a convex spherical crown shape as a whole, and the whole lens support part 18 protrudes upwards from the upper surface of the main body side flange part 20. Yes.

  The curvature radius Rb of the convex inner surface 22 of this embodiment is larger than the curvature radius (base curve) of the rear surface 26 in the swollen state after the hydration treatment of the soft type contact lens 24 shown in FIG. . Generally, since the curvature radius (base curve) of the rear surface 26 of the contact lens 24 is 8.4 mm to 8.7 mm, the curvature radius of the convex inner surface 22 is, for example, 10 mm to 15 mm, more preferably, It is set to 12 to 13 mm. Although the curvature radius of the convex inner surface 22 in the present embodiment is set to be constant as a whole, the curvature radius of the convex inner surface 22 is not necessarily set to be constant as a whole.

  Furthermore, the convex inner surface 22 is a continuous surface having no holes over the entire surface. Thereby, the convex inner surface 22 does not have a hole over the entire circumference facing the edge portion 27 of the contact lens 24, and is 95% or more of the rear surface 26 with respect to the rear surface 26 of the contact lens 24. Opposing holding surfaces 28 are provided. The holding surface 28 refers to a region surrounded by the edge portion 27 of the contact lens 24 on the convex inner surface 22. In the present embodiment, since the convex inner surface 22 is a continuous surface without holes, the holding surface 28 is opposed to the rear surface 26 in a region of 100%. However, the convex inner surface 22 is not necessarily limited to a continuous surface without a hole, and has an opening area of less than 5% of the rear surface 26 of the contact lens 24 and is opposed to the edge portion 27 without facing. May be formed.

  Furthermore, the convex inner surface 22 has a smooth surface shape without irregularities. Specifically, the surface roughness Ra of the convex inner surface 22 is a smooth surface of 25 μm or less, more preferably 6.3 μm or less. The surface roughness Ra is based on the JIS standard for surface roughness (JIS B 0601-2001).

  Further, a hinge portion 16 is integrally formed at an edge portion on one side of the main body side flange portion 20. Further, in the main body side flange portion 20, an engaging wall portion 29 as an engaging means that protrudes slightly outward is integrally formed at an end edge portion on the opposite side of the hinge portion 16 across the convex inner surface 22. ing.

  On the other hand, the lid-side plate 14 has a shape in which a central portion of a flat plate swells upward in the same manner as the main body-side plate 12. That is, a lens cover 30 formed by a reverse bowl-shaped or reverse-shaped circular bowl-shaped wall that opens downward is provided at the center of the lid-side plate 14. A cylindrical portion 31 extending with a certain diameter is formed at the lower end of the lens cover 30. Further, a flat lid-side flange portion 32 that extends to the outer peripheral side over the entire circumference of the lens cover portion 30 is integrally formed at the opening peripheral edge portion of the lower end of the cylindrical portion 31. The concave surface of the lens cover 30 is a concave inner surface 34 having a concave spherical crown shape as a whole, and the entire lens cover 30 protrudes upward from the upper surface of the lid side flange portion 32. Yes.

  The lens cover 30 is provided with a plurality of through holes 36, and the concave inner surface 34 communicates with the outer surface 38 of the lens cover 30 through the through holes 36. The number and size of the through holes 36 are set to a size that allows the storage liquid 82 to flow through the through holes 36 inside and outside a lens holding region 44 described later, and the concave inner surface 34 and the contact lens 24 described later. The surface tension of the preserving liquid 82 existing between them is set to a size that can be released by the flow of the preserving liquid 82 through the through-hole 36. Specifically, the concave inner surface 34 is preferably formed with an opening area of 10% or more of the surface facing the front surface 40 of the contact lens 24. Accordingly, a single through hole 36 may be formed as long as the storage liquid 82 is allowed to flow between the opposed surfaces of the contact lens 24 and the concave inner surface 34 through the through hole 36. The lens cover 30 of the present embodiment has a porous structure in which a plurality of through holes 36 are formed. The lens cover 30 has a through-hole 36 formed in a substantially fan shape, and a non-formed portion of the through-hole 36 is formed in a bowl shape, but a plurality of through-holes 36 are formed in a rectangular shape, A non-formed portion of the through-hole 36 may have a lattice shape that intersects vertically and horizontally.

  Further, the radius of curvature of the concave inner surface 34 is larger than the radius of curvature (front curve) of the front surface 40 of the contact lens 24 in the swollen state after the hydration treatment. In general, the contact lens 24 has a curvature radius (front curve) of the front surface 40 of about 9.0 mm. Therefore, the curvature radius of the concave inner surface 34 is, for example, 9.2 mm to 15 mm, more preferably 9 mm. .5 mm to 13 mm. In this embodiment, the radius of curvature of the concave inner surface 34 is set to be constant as a whole, but the radius of curvature of the concave inner surface 34 is not necessarily set to be constant as a whole.

  And the hinge part 16 is connected to the edge part of the one side side of the lid side flange part 32, The main body side plate 12 and the lid side plate 14 are connected so that opening and closing is possible by bending the hinge part 16. ing. Further, in the lid side flange portion 32, an engaging claw 42 as an engaging means is integrally formed on an end edge portion opposite to the hinge portion 16 with the concave inner surface 34 interposed therebetween, and the lid side plate 14 is attached to the main body. The overlapping state of the main body side plate 12 and the lid side plate 14 is maintained by overlapping the locking claw 42 with the engaging wall portion 29 of the main body side plate 12 so as to overlap the side plate 12. ing.

  By overlapping the main body side plate 12 and the lid side plate 14, as shown in FIG. 5, the concave inner surface 34 covers the convex inner surface 22 with a gap therebetween. A lens holding region 44 for accommodating the contact lens 24 is defined between the opposing surfaces of the convex surface 34 and the convex inner surface 22. The lens holding region 44 has a generally circular dome shape as a whole. The lens holding region 44 communicates with the inside and outside through a plurality of through holes 36 opened in the concave inner surface 34. The distance between the opposing surfaces of the concave inner surface 34 and the convex inner surface 22 is the same as the distance between the front surface 40 and the concave surface in the optical axis: O direction in the contact lens 24 placed with the edge portion 27 superimposed on the convex inner surface 22. A gap 48 is set across the entire front surface 40 between the opposing surfaces of the inner shape 34. Specifically, even if the lens cover 30 is deformed by external pressure, the strength and gap of the lens cover 30 where the contact lens 24 does not touch the concave inner surface 34 are set. Dimension: t is 0.7 mm to 1.0 mm, optical axis from the top of swollen contact lens 24 placed on convex inner surface 22 to concave inner surface 34: distance in O direction: d is preferably It is set to 1 mm or more, more preferably about 1.5 mm to 3 mm. Thereby, the contact lens 24 accommodated in the lens holding region 44 is separated from the convex inner surface 22 without contact deformation in the optical axis: O direction between the opposed surfaces of the convex inner surface 22 and the concave inner surface 34. It can be moved to the concave inner surface 34. In particular, since the cylindrical portion 31 is formed in the lens cover portion 30, the light from the convex inner surface 22 and the concave inner surface 34 also at the outer peripheral edge portions of the convex inner surface 22 and the concave inner surface 34 having different curvatures. The facing distance in the axis: O direction is ensured, and the gap 48 can be effectively secured throughout the contact lens 24 including the edge portion 27.

  Such a lens holding member 10 is integrally formed of a plastic-based synthetic resin such as polypropylene (PP) or polyethylene (PE) by a conventionally known resin molding method such as injection molding. Preferably, the lens holding member 10 has a transparent structure that transmits visible light. Thereby, the visibility at the time of confirming the contact lens 24 accommodated in the lens holding | maintenance area | region 44 from the exterior, without opening the lens holding member 10 can be improved.

  The type and material of the contact lens 24 held by the lens holding member 10 are not limited. For example, a hydrophilic soft contact lens made of HEMA (hydroxyethyl methacrylate) or silicone hydrogel may be used. Further, an oxygen permeable hard contact lens may be used. The contact lens 24 is preferably subjected to surface treatment in advance by plasma processing before being accommodated in the lens holding region 44. For example, as schematically shown in FIG. 6, the contact lens 24 before the hydration treatment is set in the lens housing portion 52 of the transport device 50. The conveyance device 50 is, for example, a belt conveyor or the like, and conveys the plurality of lens housing portions 52 in the conveyance direction (from left to right in FIG. 6). A pair of plasma generators 54 are arranged at a predetermined distance from each other on both sides of the transfer device 50 perpendicular to the transfer direction. The plasma gas is sprayed from the plasma generator 54 onto the front surface 40 and the rear surface 26 of the contact lens 24, so that the hydrophilicity of the front surface 40 and the rear surface 26 is enhanced. The contact lens 24 that has been subjected to plasma processing is housed in the lens holding member 10, and in this state, is subjected to a hydration process and a cleaning process to be in a swollen state containing water.

  When the contact lens 24 is accommodated and held in the lens holding region 44 of the lens holding member 10, the front surface 40 side is protected by the lens cover portion 30, while the rear surface 26 side is protected by the lens support portion 18. Further, since the lens holding region 44 has a shape close to the contact lens 24 by the convex inner surface 22 and the concave inner surface 34, strong contact and reversal of the contact lens 24 in the lens holding region 44 are prevented. Thus, the contact lens 24 can be stably held.

  Such a lens holding member 10 is arranged in a lens distribution case used for transportation or storage for providing a contact lens from a lens manufacturer to an end user, and is used for a contact lens packaging container. 7 to 9 show a contact lens packaging container 60 as a first embodiment of the present invention relating to a contact lens packaging container using the lens holding member 10. The contact lens packaging container 60 has a structure in which the lens holding member 10 holding the contact lens 24 is accommodated in a lens distribution case 62. 7 shows a state where the lens distribution case 62 and the lens holding member 10 are opened, and FIG. 8 shows a lid side sheet 66 side which will be described later in a closed state of the lens distribution case 62.

  The lens distribution case 62 includes a main body side sheet 64 as a first sheet and a lid side sheet 66 as a second sheet, and the main body side sheet 64 overlaps the main body side plate 12 of the lens holding member 10. On the other hand, the lid side sheet 66 is superimposed on the lid side plate 14. Each of the main body side sheet 64 and the lid side sheet 66 is a flexible sheet that can be easily deformed, and is formed with an area capable of covering the main body side plate 12 or the lid side plate 14 to be overlaid. . As the main body side sheet 64 and the lid side sheet 66, the whole may be formed of a synthetic resin material such as nylon, polyester, or polyolefin. Preferably, a metal foil such as aluminum foil is coated with polyethylene terephthalate, polypropylene, or the like. A laminate material in which a thermoplastic synthetic resin film is laminated may be employed. As a laminate material in which a thermoplastic synthetic resin film is laminated on a metal foil, in consideration of corrosion resistance, strength resistance to external force, etc., for example, a multilayer of three or more layers such as nylon, aluminum alloy and polypropylene Those consisting of are preferably employed. The main body side sheet 64 and the lid side sheet 66 are appropriately printed with information such as a base curve and a lens diameter of the contact lens 24 to be accommodated, information such as a manufacturer and serial number, and decorations such as appropriate characters and designs. Applied.

  The main body side sheet 64 is superimposed on the surface of the main body side plate 12 opposite to the lid side plate 14 and is fixed to the main body side plate 12 by adhesion, welding, or the like. The main body side sheet 64 is spot welded at two spot welding surfaces 68 and 68 at the end of the main body side plate 12 on the engagement wall portion 29 side. On the other hand, the lid side sheet 66 is superimposed on the surface of the lid side plate 14 opposite to the main body side plate 12. In the present embodiment, of the main body side plate 12 and the lid side plate 14 of the lens holding member 10, the lid side plate 14 is not fixed to the lid side sheet 66, and only the main body side plate 12 is attached to the main body side sheet 64. It is fixed.

  As shown in FIG. 9, a lens holding member in which the contact lens 24 is held between the overlapping surfaces of the main body side sheet 64 and the lid side sheet 66 and the main body side plate 12 and the lid side plate 14 are overlapped. 10 is arranged. Then, the main body side sheet 64 and the lid side sheet 66 are heat sealed at a heat seal fixing surface 70 (see FIG. 7 and the like) as a sealing region surrounding the outer periphery of the lens holding member 10 and fixed in a watertight manner so as to be peelable from each other. Thus, the lens distribution case 62 is configured. Between the overlapping surfaces of the main body side sheet 64 and the lid side sheet 66, a housing portion 72 is formed in which the outer peripheral edge portion is hermetically sealed by the heat seal fixing surface 70, and the lens holding member 10 is It is accommodated in the accommodating portion 72. The fixing strength of the heat seal fixing surface 70 is set lower than the fixing strength of the spot welding surface 68.

  Further, the heat seal fixing surface 70 has three sides except for one side of the open end portions 74 and 76 located on the opposite side of the hinge portion 16 of the lens holding member 10 in each of the main body side sheet 64 and the lid side sheet 66. The side edges 64 and 76 are formed on the outer peripheral edges of the body-side sheet 64 and the lid-side sheet 66, while the sides on the open end portions 74 and 76 are inward of the sheets 64 and 66 from the open end portions 74 and 76. Is located. Thereby, even in the sealed state of the main body side sheet 64 and the lid side sheet 66, the open end portions 74 and 76 are free end portions, and the open end portions 74 and 76 are gripped to open the open end portions 74 and 76. It can be opened easily. In addition, a hook-like portion 78 sharpened toward the open end portions 74 and 76 is formed at the central portion of one side of the open end portions 74 and 76 on the heat seal fixing surface 70, so that the peeling operation can be performed. It is easier.

  The overlapping portion of the lid-side sheet 66 with the lid-side plate 14 has a substantially similar shape that is slightly larger than the lid-side plate 14 and is recessed toward the lid-side plate 14. It is formed by drawing or the like. Accordingly, the lid side sheet 66 is superposed along the outer surface of the lid side plate 14 so as to accommodate the lid side plate 14 in the accommodating recess 80 in a state of being superimposed on the lid side plate 14. . On the other hand, the main body side sheet 64 superimposed on the main body side plate 12 has a substantially flat shape.

  Note that the storage liquid 82 is stored in the storage portion 72 together with the lens holding member 10. The type and material of the preservative solution 82 are not limited, and prevent the contact lens 24 from drying and keep the contact lens 24 ready for use. For example, a sterile aqueous solution or an isotonic saline solution may be used. Used. As shown in FIG. 10, the storage liquid 82 is accommodated in the accommodating portion 72 by leaving a part of the heat seal on the circumference of the heat seal fixing surface 70 to communicate the inside and outside of the accommodating portion 72. A through hole 84 is formed. The storage solution 82 is injected from the nozzle 85 into the storage portion 72 through the through-hole 84 and the heat seal fixing surface 70 of the through-hole 84 is heat-sealed, so that the storage portion 72 is sealed water-tight over the entire circumference. Stopped. As a result, the storage liquid 82 is filled in the storage portion 72 and the lens holding member 10 is immersed in the storage liquid 82. As a result, the storage liquid 82 flows into the lens holding area 44 of the lens holding member 10 through the through hole 36, and the contact lens 24 accommodated in the lens holding area 44 is immersed in the storage liquid 82. In this way, the lens distribution case 62 is formed, and the lens holding member 10 is accommodated in the lens distribution case 62 to form the contact lens packaging container 60.

  According to such a contact lens packaging container 60, the contact lens 24 can be protected by the lens holding member 10. As a result, the contact lens 24 can be stably held in the lens distribution case 62, and the contact lens 24 can be protected from vibration, impact, etc. during storage and transportation. In particular, in the lens holding region 44 of the lens holding member 10, the contact lens 24 is movable in the direction of the optical axis: O (see FIG. 5) without contact deformation. Can be more effectively prevented.

  Since the contact lens 24 can be protected by using the lens holding member 10, the lens distribution case 62 can be formed by the main body side sheet 64 and the lid side sheet 66 which can be easily deformed, and the main body side sheet 64 and the lid side. By arranging the sheet 66 along the lens holding member 10, the lens distribution case 62 can be made compact. As a result, the amount of the storage solution 82 required can be greatly reduced.

  When the contact lens 24 is taken out from such a contact lens packaging container 60, the open end portions 74 and 76 of the main body side sheet 64 and the lid side sheet 66 are respectively picked and peeled from each other. Thereby, the heat seal fixing surface 70 is peeled off, and the lid side sheet 66 is peeled off from the main body side sheet 64. Here, since only the main body side plate 12 of the lens holding member 10 is fixed to the main body side sheet 64, only the lid side sheet 66 is separated from the lens holding member 10 as shown in FIG. The lens distribution case 62 is opened while the member 10 is maintained in the closed state.

  At this time, as shown in FIG. 12, the storage liquid 82 between the front surface 40 and the concave inner surface 34 of the contact lens 24 is discharged to the outside of the lens holding region 44 through the through hole 36. On the other hand, the surface tension of the storage liquid 82 acts between the rear surface 26 and the convex inner surface 22 to define a closed storage liquid filling region 86, and the contact lens 24 is adsorbed and held on the convex inner surface 22. . Then, by releasing the engagement between the locking claw 42 and the engagement wall portion 29 in the lens holding member 10 and opening the lid side plate 14 from the main body side plate 12, as shown in FIG. The contact lens 24 can be taken out in a state in which 24 is attracted and held on the convex inner surface 22. Next, as shown in FIG. 13, for example, the surface tension of the preservation solution 82 is broken by pressing the belly of the index finger against the central portion of the contact lens 24 to crush the contact lens 24. As a result, the preservation solution 82 filled in the preservation solution filling region 86 flows out, the contact of the contact lens 24 due to the surface tension is eliminated, and the contact lens 24 is removed from the convex inner surface 22.

  According to the present embodiment, the concave inner surface 34 is provided with a through hole 36, while the convex inner surface 22 faces the entire edge portion 27 of the contact lens 24 and an area of 95% or more of the rear surface 26. A holding surface 28 is provided. Therefore, when the lens distribution case 64 is opened, the storage liquid 82 between the concave inner surface 34 and the front surface 40 of the contact lens 24 is discharged through the through-hole 36, and thereby the concave inner surface 34 and the front surface 40. Between the convex inner surface 22 and the rear surface 26, the storage liquid 82 is held in the storage liquid filling region 86 to effectively express the surface tension between the convex inner surface 22 and the rear surface 26. I can do it. As a result, the attracting force on the convex inner surface 22 can be increased as compared with the attracting force on the concave inner surface 34 of the contact lens 24, and with a higher probability when the lens holding member 10 is opened. The contact lens 24 can be adsorbed on the convex inner surface 22 side. As a result, the contact lens 24 can be taken out from the front surface 40 side, can be easily worn without being placed on the fingertip of the other hand, and the chance of the finger touching the rear surface 26 is reduced. Can be improved.

  In particular, since the convex inner surface 22 has a shape with no holes over the entire surface, it is possible to provide the holding surface 28 that faces the rear surface 26 of the contact lens 24 in a region of 100%. Thereby, the preservation | save liquid 82 can be hold | maintained more reliably between the rear surface 26 and the convex-shaped inner surface 22, and more excellent adsorption power can be obtained. That is, since the contact lens 24 is preliminarily plasma processed before being accommodated in the lens holding member 10, it is not necessary to perform plasma processing after being accommodated in the lens holding member 10, and the convex inner surface 22 is formed. It can be made into the shape without a hole over the whole surface. Further, the convex inner surface 22 is configured with a radius of curvature (for example, 10 mm to 15 mm) larger than the radius of curvature of the rear surface 26 (for example, 8.6 mm), and the surface roughness of the convex inner surface 22 is Since Ra is set to 25.0 μm or less, the edge portion 27 is formed by the surface tension of the storage liquid 82 while the storage liquid filling region 86 is reliably defined between the rear surface 26 and the convex inner surface 22. It is possible to more reliably realize that it is closely attached to. On the other hand, the lens cover 30 formed with the concave inner surface 34 has a porous structure in which a plurality of through holes 36 are formed. As a result, even when the front surface 40 of the contact lens 24 overlaps the concave inner surface 34, the storage liquid 82 can be discharged through any of the through holes 36, and the surface tension between the front surface 40 and the concave inner surface 34. Can be broken more reliably. Furthermore, the radius of curvature of the concave inner surface 34 is larger than the radius of curvature of the front surface 40, and it is difficult to form a closed space such as the storage liquid filling region 86 between the concave inner surface 34 and the front surface 40. Therefore, it is difficult for the surface tension of the storage liquid 82 to be exerted on the concave inner surface 34 side.

  The lens distribution case 62 of the present embodiment is formed from a sheet material of a main body side sheet 64 and a lid side sheet 66. Thereby, the lens distribution case 62 can be formed in a compact manner, and the amount of the storage solution 82 to be stored can be reduced. Further, the lid side sheet 66 is not fixed to the lens holding member 10, and only the main body side sheet 64 is fixed to the lens holding member 10. Thereby, the lens holding member 10 is maintained in the closed state at the stage where the main body side sheet 64 and the lid side sheet 66 are peeled off, and the contact lens 24 can be prevented from falling off even when peeled off vertically. . At the same time, even when the upper and lower parts are accidentally peeled off, the main body side plate 12 can be more reliably positioned downward before the lens holding member 10 is opened, and the contact lens 24 can be more reliably attached with the action of gravity. Can be adsorbed to the convex inner surface 22 side. In addition, by opening the lens distribution case 62 before opening the lens holding member 10, the storage liquid 82 in the lens holding region 44 is discharged through the through hole 36, so that the suction force toward the concave inner surface 34 side is increased. It can also be released more securely.

  The lens holding member and the contact lens packaging container having the structure according to the present invention have been described in detail above. However, this is merely an example, and the present invention is interpreted in a limited manner by such specific description. is not. In the following, several different embodiments of the present invention are illustrated, but it should be understood that the present invention is not limited to the aspects described below. In the following description, members and parts having the same structure as in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description thereof is omitted. .

  For example, FIG. 14 shows a contact lens packaging container 90 as a second embodiment of the present invention relating to a contact lens packaging container. In the contact lens packaging container 90 of the present embodiment, the open end portion 76 of the lid side plate 14 is also welded to the lid side sheet 66 with the spot welding surface 68 in the contact lens packaging container 60 as the first embodiment. It is a thing. Therefore, in the present embodiment, the main body side sheet 64 is overlapped and fixed to the main body side plate 12, and the lid side sheet 66 is overlapped and fixed to the lid side plate 14. According to the present embodiment, when the main body side sheet 64 and the lid side sheet 66 are peeled, the main body side plate 12 and the lid side plate 14 of the lens holding member 10 are caused to follow, simultaneously with the opening of the lens distribution case 62. The lens holding member 10 can be opened. Even in this case, the surface tension of the storage liquid 82 acts between the rear surface 26 of the contact lens 24 and the convex inner surface 22, and the contact lens 24 can be adsorbed and held on the convex inner surface 22 side. As a result, as in the first embodiment, the contact lens 24 can be taken out from the front surface 40 side, and the chance of the finger touching the rear surface 26 can be reduced.

  Next, FIG. 15 shows a lens holding member 100 as a second embodiment of the present invention relating to the lens holding member. In the main body side plate 12 of the lens holding member 100, a protruding piece-shaped main body side engaging piece 102 is integrally formed at the edge of the lens holding member 100 opposite to the hinge portion 16. On the other hand, in the lid-side plate 14, a protruding piece-shaped lid-side engagement piece 104 is integrally formed at an end edge opposite to the hinge portion 16. The main body side engaging piece 102 and the lid side engaging piece 104 are formed over substantially half of the main body side plate 12 and the lid side plate 14 opposite to each other.

  When such a lens holding member 100 is overlapped with the main body side plate 12, the main body side engaging piece 102 and the lid side engaging piece 104 are brought into pressure contact with each other to be engaged with each other. The side plate 12 and the lid side plate 14 are held in an overlapped state. Thus, in the present embodiment, the main body side engaging piece 102 and the lid side engaging piece 104 constitute an engaging means.

  16 and 17 show a lens holding member 110 as a third embodiment of the present invention relating to the lens holding member. In the lens holding member 110, the main body side plate 12 and the lid side plate 14 have separate structures.

  Engagement plate portions 112 are integrally formed on both sides of the main body side plate 12 with the lens support portion 18 in between. The engagement plate portion 112 has a long rectangular plate shape, and as shown in a model in FIG. 18A, the main body side plate is formed by thin support portions 114 and 114 formed at both end edges in the longitudinal direction. 12 is supported in a state where it floats above a retraction hole 116 penetrating in the frame 12. In addition, the surface of the engagement plate portion 112 is formed with unevenness to prevent finger slipping as necessary. Further, a central thin portion 118 is formed in the central portion of the engagement plate portion 112 in the longitudinal direction, and the engagement plate portion 112 is formed in the retraction hole 116 in the central thin portion 118 as shown in FIG. It is possible to bend towards.

  In the main body side plate 12, positioning protrusions 120 and 120 are formed at a pair of opposing edge portions. The positioning protrusions 120, 120 protrude in the same direction as the lens support portion 18 by the thickness of the lid-side plate 14. The lid side plate 14 is positioned on the main body side plate 12 by the lid side plate 14 being sandwiched between the pair of positioning protrusions 120, 120.

  On the other hand, in the lid-side plate 14, a long rectangular engagement hole 122 that is substantially the same as the engagement plate portion 112 is provided at a position overlapping the engagement plate portion 112. Engagement ribs 124 and 126 are respectively formed on the outer peripheral surface at both ends in the longitudinal direction of the engagement plate portion 112 and the inner peripheral surface of the engagement hole 122 facing the engagement plate portion 112, as shown in FIG. The engagement rib 126 of the engagement hole 122 is sandwiched between the engagement rib 124 of the engagement plate portion 112 and the main body side plate 12 in a state where the engagement plate portion 112 is not bent.

  As shown in FIGS. 17 and 18B, such a lens holding member 110 is engaged when the lid plate 14 is superimposed on the main body side plate 12 with the engagement plate portion 112 folded. The engagement plate portion 112 is inserted into the joint hole 122. Then, as shown in FIGS. 16 and 18A, when the engagement plate portion 112 is not bent, the engagement rib 124 of the engagement plate portion 112 and the engagement rib 126 of the engagement hole 122 are formed. The lid side plate 14 is held in an overlapped state with the main body side plate 12 by being engaged with each other. When opening the lens holding member 110, as shown in FIGS. 17 and 18B, the engagement plate portion 112 is bent and the engagement between the engagement rib 124 and the engagement rib 126 is released. Thus, the lid side plate 14 can be detached from the main body side plate 12. Thus, in the present embodiment, the engagement plate portion 112 and the engagement hole 122 constitute an engagement means.

  According to the present embodiment, since a plurality of sets of the engagement plate portion 112 and the engagement hole 122 are provided, even when the engagement of any one of the engagement plate portion 112 and the engagement hole 122 is unexpectedly released. The overlapping state of the lid side plate 14 and the main body side plate 12 can be maintained. Further, as is apparent from the present embodiment, the first holding part by the main body side plate 12 and the second holding part by the lid side plate 14 may be formed separately from each other. As an aspect of this, it is good also as a structure etc. which are hold | maintained in an overlapping state by uneven | corrugated fitting.

  Next, FIG. 19 shows a lens holding member 130 as a fourth embodiment of the present invention relating to the lens holding member. The lens cover 30 of the present embodiment has a porous structure in which a plurality of through holes 132 partially extending in the circumferential direction of the concave inner surface 34 and a plurality of through holes 134 extending linearly are penetrated. Thus, various shapes can be adopted as the through holes.

  FIG. 20 shows a lens holding member 140 as a fifth embodiment of the present invention relating to the lens holding member. In the center of the convex inner surface 22 in the present embodiment, a circular through hole 142 that penetrates the main body side plate 12 is formed. The opening area of the through hole 142 is set to be less than 5% of the rear surface 26 of the contact lens 24. Thereby, the convex inner surface 22 of the present embodiment provides a holding surface 28 (see FIG. 5 and the like) that faces the rear surface 26 in an area of 95% or more. Further, since the through hole 142 is formed at the center of the convex inner surface 22, the edge portion 27 of the contact lens 24 is opposed to the convex inner surface 22 over the entire circumference. As is apparent from the present embodiment, the convex inner surface is not necessarily limited to a shape having no holes over the entire surface.

  Although several embodiments of the present invention have been described above, these are merely examples, and the present invention is not construed as being limited to specific descriptions in such embodiments.

  For example, the convex inner surface is not necessarily formed with a constant radius of curvature, and may be an aspherical shape or the like. In addition, the sterilization effect of the rear surface of the lens is improved by providing a flat portion on a part of the convex inner surface or by making the convex inner surface into a polyhedron shape so that more storage solution is accommodated between the rear surface of the lens and the convex inner surface. It may be equal.

  Further, as described above, in the lens holding member, the first holding portion having the convex inner surface and the second holding portion having the concave inner surface may be formed separately from each other or integrally formed. Even in this case, the first holding part and the second holding part which are formed separately from each other are not limited to being integrally formed, and may be integrally configured by adhesion or welding. Moreover, although the main body side plate 12 as the first holding part and the lid side plate 14 as the second holding part in the above-described embodiment have been formed into a thin and rectangular plate shape, the first holding part and the second holding part May have a predetermined thickness dimension, and is not limited to a rectangle, and any shape can be adopted. Furthermore, for example, in the contact lens packaging container 60 of the above-described embodiment, the main body side sheet 64 and the lid side sheet 66 are welded to each other so that the main body side plate 12 and the lid side plate 14 of the lens holding member 10 are superposed. The engagement means is not always necessary as long as it can be maintained.

  Furthermore, in the lens distribution case 62 of the above embodiment, the main body side sheet 64 and the lid side sheet 66 may be integrally formed with a single flexible sheet. Further, as a lens distribution case, a blister pack in which the opening of a hard container is fluidly covered with a sheet may be used. By storing the lens holding member that stores the contact lens in the container of such a blister pack, the contact lens can be protected from being hit in the container. Each of the lens holding members described above is accommodated in the lens distribution case, for example, in the same manner as the lens holding member in the first embodiment, even though the description of the accommodation state in the lens distribution case is omitted. Of course, it can be used in the distribution process as a contact lens packaging container.

  About the usefulness of this invention, the test body of Example 1 and Example 2 and Comparative Examples 1-4 which are shown to Fig.21 (a)-(f) was prepared, and it compared and examined. In Examples 1-2 and Comparative Examples 1-4, the size of the holding surface facing the rear surface of the contact lens on the convex inner surface is different, and the size and shape of the holes penetrating the convex inner surface are different. It is different. Example 1 is a lens holding member having a structure according to the first embodiment (see FIG. 1 and the like), in which no hole is formed on the convex inner surface. Example 2 is a lens holding member having a structure according to the fifth embodiment (see FIG. 20), and has a hole having an opening area of 1.9% with respect to the rear surface of the lens (lens diameter 14.2 mm). Examples 1 and 2 that provide a holding surface facing the rear surface of the lens in an area of 95% or more are in accordance with the present invention. Similarly, a hole having an opening area with respect to the rear surface of the lens is formed in Comparative Example 1 of 6.8%, Comparative Example 2 of 9.5%, Comparative Example 3 of 19.4%, and Comparative Example 4 of 9.3%. Yes.

  Various contact lenses were accommodated in the lens holding members of Examples 1 to 2 and Comparative Examples 1 to 4, and the lens holding member was placed in a flexible container containing a storage solution and was swung in the container. Thereafter, the lens holding member taken out from the container was opened, and the number of times that the contact lens was adsorbed on the concave inner surface and the number of times that the contact lens was adsorbed on the convex inner surface were recorded.

  Table 1 shows the results of using a daily disposable type silicone lens (unreleased product) in a swollen state after hydration treatment as a contact lens. Table 2 shows the results of using a two-week exchange type silicone lens (product name: Premio) in a swollen state after hydration. As is apparent from Tables 1 and 2, according to the lens holding members of Examples 1 and 2 according to the present invention, it is confirmed that the contact lens is attracted to the convex inner surface side with a probability of 60% or more. It was done. In particular, according to Example 1 having no hole on the convex inner surface, it was confirmed that the contact lens can be adsorbed on the convex inner surface side with a high probability of 90% or more.

  Further, although not shown in the table, the same test was performed 10 times for the lens holding member of Example 1 using a dry-use daily disposable silicone lens (unreleased product) before hydration treatment. However, the contact lens was adsorbed on the convex inner surface side in all 10 times. Furthermore, when the lens holding member is taken out without swinging in the flexible container using the contact lens shown in Table 2, the contact lens is attracted to the convex inner surface in all 29 trials. It was. As described above, when the lens holding member according to the present invention is used, the contact lens can be attracted to the convex inner surface side with a high probability when the lens holding member is opened.

10: Lens holding member, 12: Main body side plate (first holding portion), 14: Lid side plate (second holding portion), 22: Convex inner surface, 24: Contact lens, 26: Rear surface (contact lens), 27 : Edge portion, 28: holding surface, 29: engagement wall portion (engagement means), 34: concave inner surface, 36: through hole, 38: outer surface (lens cover), 40: front surface (contact lens), 42 : Locking claw (engaging means), 44: lens holding region, 50: conveying device, 54: plasma generator, 60: contact lens packaging container, 62: lens distribution case, 64: main body side sheet (first sheet) , 66: lid side sheet (second sheet), 68: spot welding surface, 70: heat seal fixing surface (sealing area), 82: storage liquid, 86: storage liquid filling area

Claims (14)

A lens holding member that is arranged in a lens distribution case filled with a preservative solution and accommodates and holds a contact lens,
A lens holding region is formed between the convex inner surface and the concave inner surface by overlapping a first holding portion having a spherical inner surface with a convex shape and a second holding portion having a concave inner surface with a spherical shape. Is defined,
While a through hole is provided in the concave inner surface forming portion of the second holding part to allow the storage solution to flow through the through hole inside and outside the lens holding region,
The convex inner surface of the first holding portion has a larger radius of curvature than the rear surface of the contact lens and provides a holding surface facing the rear surface in a region of 95% or more including the edge portion of the contact lens. A lens holding member characterized in that   The lens holding member according to claim 1, wherein the convex inner surface of the first holding portion has a smooth surface shape over the entire region facing the contact lens.   The lens holding member according to claim 1, wherein a region where the concave inner surface is formed in the second holding portion has a porous structure.   In the contact lens accommodated in the lens holding region, the movement in the optical axis direction between the opposing surfaces of the convex inner surface of the first holding portion and the concave inner surface of the second holding portion is contact deformed. The lens holding member according to claim 1, wherein the lens holding member is allowed without being accompanied.   The lens holding member according to claim 1, wherein the concave inner surface of the second holding portion has a larger radius of curvature than the front surface of the contact lens.   The region where the convex inner surface is formed in the first holding part and the region where the concave inner surface is formed in the second holding part are both inverted bowl-shaped walls that open downward. The lens holding member according to any one of?   The lens holding member according to any one of claims 1 to 6, wherein the first holding portion and the second holding portion are integrally configured to be bendable with each other.   The lens according to claim 1, further comprising an engaging unit that holds the first holding unit and the second holding unit in an overlapped state that defines the lens holding region. Holding member.   The lens holding member according to any one of claims 1 to 8 is accommodated in a lens distribution case filled with a storage solution, and a contact lens is accommodated and held in the lens holding region of the lens holding member. A contact lens packaging container characterized by comprising:   The contact according to claim 9, wherein the contact lens that has been surface-treated in advance by plasma processing is accommodated in the lens holding area defined by the first holding part and the second holding part. Lens packaging container.   The lens holding member is disposed between the overlapping surfaces of the first sheet and the second sheet so that the first holding part and the second holding part are overlapped, and encloses the outer periphery of the lens holding member The contact lens packaging container according to claim 9 or 10, wherein the lens distribution case is configured by closely contacting the first sheet and the second sheet in a region.   The contact lens packaging container according to claim 11, wherein at least one of the first sheet and the second sheet is a laminate material in which a thermoplastic synthetic resin film is laminated on a metal foil.   The first sheet is overlaid on the first holding part, while the second sheet is overlaid on the second holding part, and the first holding part and the second holding part include the first The contact lens packaging container according to claim 11 or 12, wherein only the holding portion is fixed to the first sheet.   The contact lens packaging container according to claim 11 or 12, wherein the first sheet is overlapped and fixed to the first holding part, and the second sheet is overlapped and fixed to the second holding part. .

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