WO2021210824A1

WO2021210824A1 - Penetration hole processing method, and contact lens processed using same

Info

Publication number: WO2021210824A1
Application number: PCT/KR2021/004184
Authority: WO
Inventors: 김지태
Original assignee: 김지태
Priority date: 2020-04-14
Filing date: 2021-04-05
Publication date: 2021-10-21
Also published as: KR102229389B1

Abstract

The presented technology relates to a penetration hole processing method, and a contact lens processed using same, and, more specifically, the invention relates to: a method for processing penetration holes, formed on a soft contact lens, for tear circulation; and a contact lens processed using same.

Description

Drilling tool processing method and contact lenses processed using the same

The proposed technology relates to a perforated ball processing method and a contact lens processed using the same, and more particularly, a method for processing a perforated ball formed in a soft contact lens for tear circulation, and a contact lens processed using the same am.

In general, contact lenses, like glasses, are lenses that correct refractive errors in the eyes such as nearsightedness and farsightedness. These contact lenses are good for vision correction in patients with severe or irregular corneal astigmatism, and have a long lifespan. In addition, it is easy to wash, and it is easy to wear and separate, and in particular, compared to glasses, it is possible to maintain a natural impression of a person, so it is in the spotlight from many people.

In addition, contact lenses are also being developed for various purposes, such as therapeutic contact lenses that prevent the corneal recovery from being inhibited by the interference of external factors by blocking the damaged cornea from the outside.

However, unlike glasses, contact lenses have many inconveniences and problems behind some convenient points because they are worn in the form of being directly attached to the eyeball.

Typically, the cornea of the eye receives oxygen from the air and nutrients from tears.

To solve this problem, a perforation ball is processed in the contact lens.

In general, the punching sphere is processed by irradiating a laser to the contact lens, and in the prior art, the punching sphere was processed by irradiating the laser directly to the contact lens.

However, in this method, as shown in FIG. 6 , when the laser is irradiated, a laceration occurs in the contact lens, and damage and burr caused by the laceration occurring around the perforation sphere are various inflammations when wearing the contact lens in the eye. And there was a problem that it was difficult to actually wear it by generating a feeling of foreign body.

The present invention was invented to solve the above problems, and it provides a drilling tool processing method that can prevent damage and viseme caused by lacerations occurring around the drilling tool during drilling tool processing using a conventional laser. There is a purpose.

In the punching tool processing method of the present invention for achieving the above object,

preparing a first mold forming a front surface of the contact lens and a second mold forming a rear surface of the contact lens;

A liquid-phase injection step of a monomer, which is a raw material for a contact lens, into the concave portion of the first mold;

coupling a second mold to the first mold so that the first mold and the second mold are superimposed on each other;

a step in which the monomer is polymerized;

fixing the first mold and the second mold coupled to each other to a jig;

irradiating a laser toward the convex portion of the first mold;

Forming a perforation hole in the contact lens by a laser;

separating the first mold and the second mold;

Completing the manufacturing of the contact lens; characterized in that it includes.

In the preparation step of a first mold forming the front surface of the contact lens and a second mold forming the rear surface of the contact lens,

The first mold and the second mold are formed by a cast mold casting method.

In the step of injecting a liquid monomer, which is a raw material for a contact lens, into the concave part of the first mold,

The monomer is characterized in that it is HEMA (2-Hydroxyethylmethacrylate).

The temperature applied to the monomer in the step of the polymerization reaction of the monomer is characterized in that a certain temperature or more.

In the step in which the monomer is polymerized, the monomer is characterized in that it is solidified.

In the step of polymerization reaction of the monomer,

The first mold and the second mold have higher strength than the polymerization-reacted monomer.

The monomer solidified in the step of polymerization reaction is characterized in that the first mold and the second mold are fixed by compression.

In the step of irradiating a laser toward the convex portion of the first mold,

The laser sequentially penetrates the first mold, the monomer and the second mold.

In the step of irradiating a laser toward the convex portion of the first mold,

The laser is irradiated perpendicular to the convex portion.

In the step of forming a hole in the contact lens by the laser,

It is characterized in that a plurality of perforations are spaced apart from each other at a predetermined angle in the radial direction of the contact lens.

According to the present invention, there is an effect that can prevent damage and viseme around the punching hole that occurred in the prior art during the processing of the drilling tool using a laser.

Therefore, there is an effect that can solve the problem of various inflammation and foreign body sensation caused by damage around the perforation hole and viseme when wearing contact lenses.

1 is a first mold and a second mold preparation step according to the present invention.

2 is a perspective view illustrating a mold core for manufacturing a first mold according to the present invention.

3 is a monomer injection step according to the present invention.

4 is a monomer polymerization reaction step according to the present invention.

5 is a laser irradiation step according to the present invention.

Figure 6 is a cross-sectional view of a drilling tool processed in the contact lens according to the present invention.

7 is a cross-sectional view of a drilling tool processed in a conventional contact lens.

8 is a complete step of manufacturing a contact lens according to the present invention.

The features and effects of the present invention described above will become more apparent through the following detailed description in relation to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains can easily implement the technical idea of the present invention. will be able Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. The terms used in the present application are only for describing specific embodiments, and are not intended to limit the present invention.

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

The present invention relates to a method of processing a punching ball and a contact lens processed using the same, and more particularly, to a method of processing a punching ball formed in a soft contact lens for tear circulation and a contact lens processed using the same am.

The punching tool processing method of the present invention,

preparing a first mold (2) forming the front surface of the contact lens and a second mold (8) forming the rear surface of the contact lens;

liquid injection of the monomer 10, which is a raw material for the contact lens, into the concave portion 4 of the first mold 2;

coupling the second mold (8) to the first mold (2) so that the first mold (2) and the second mold (8) are superimposed on each other;

polymerizing the monomer (10);

fixing the first mold (2) and the second mold (8) coupled to each other to a jig (12);

irradiating a laser 14 toward the convex portion 6 of the first mold 2;

forming a perforation hole (16) in the contact lens by the laser (14);

separating the first mold (2) and the second mold (8);

It proceeds including; the step of completing the manufacture of the contact lens (10).

1 shows a first mold and a second mold preparation step according to the present invention.

In the preparation step of the first mold 2 forming the front surface of the contact lens and the second mold 8 forming the rear surface of the contact lens, the first mold 2 and the second mold 6 are It is formed by a cast mold casting method, and is formed of a plastic material.

2 is a perspective view illustrating a mold core for manufacturing the first mold according to the present invention. The mold core 10 for manufacturing the first mold 8 will be described in detail with reference to FIG. 2 as follows.

The mold core 10 may be formed to have a predetermined diameter and height, and a space for manufacturing the first mold 8 may be formed therein. In addition, a curve 11 inclined downwardly inward may be formed on the upper surface, and an inner groove 20 may be formed in a circular band shape on the surface of the curve 11 . The inner groove 20 may be formed using a diamond turning cutting machine (DTM) or the like, and the sharp edge portion on which the inner groove 20 is formed may be gently rounded.

A plurality of discharge grooves 30 spaced apart from each other may be formed in the inner groove 20 . For example, the discharge groove 30 can be formed in the inner groove 20 by using an ultra-precision drilling machine, and the first mold 8 manufactured by the mold core 10 by the discharge groove 30 protrusions may be formed. Accordingly, in the case of the contact lens manufactured by the first mold 8, a perforation is formed so that the discharge and inflow of tears can be made.

The shape of the aforementioned mold core 10 is not limited to the illustrated bar, and the configuration of the discharge groove 30 may be selectively provided. That is, since the perforation hole 16 is formed in the contact lens by irradiation of the laser 14 to be described later, the configuration of the discharge groove 30 may be omitted, and before the formation of the perforation hole 16 using the laser 14 . It is possible to guide the irradiation position of the laser 14 by forming a perforation in the contact lens in advance.

3 shows the monomer injection step according to the present invention.

When the preparation of the first mold 2 and the second mold 8 is completed, the monomer 10, which is a raw material for the contact lens, is placed in the concave portion 4 of the first mold 2 in a liquid state. is injected

In this case, the monomer 10 may be HEMA (2-Hydroxyethylmethacrylate), and the type of the monomer 10 may vary according to the intention of the manufacturer.

When the monomer 10 is injected into the concave portion 4 of the first mold 2 , the monomer 10 is injected by a predetermined amount.

When the injection of the monomer 10 is completed, the step of coupling the second mold 8 to the first mold 2 so that the first mold 2 and the second mold 8 are superimposed on each other proceeds

When the first mold 2 and the second mold 8 are combined, the second mold 8 is partially inserted into the concave portion 4 of the first mold 2 .

When the first mold 2 and the second mold 8 are fully coupled to each other, the second mold 8 does not come into contact with the concave portion 4 of the first mold 2, and A space between the concave portion 4 of the first mold 2 and the second mold 8 becomes a space into which the monomer 10 is injected.

That is, the space between the concave portion 4 of the first mold 2 and the second mold 8 becomes a space in which the contact lens is formed, so that it has a cross section of the same shape as the cross section of the contact lens. is formed

4 shows the steps of the monomer polymerization reaction according to the present invention.

When the bonding of the first mold 2 and the second mold 8 is completed, the polymerization reaction of the monomer 10 proceeds.

In the step of the polymerization reaction of the monomer 10, a high temperature of at least a certain temperature is applied to the monomer 10, whereby the monomer 10 is solidified.

In this case, the first mold 2 and the second mold 8 have higher strength than the polymerization-reacted monomer 10 .

The monomer 10 solidified by a polymerization reaction, that is, prepared in the form of a contact lens 10, is in a compression-fixed state by the first mold 2 and the second mold 8, that is, the first There is no empty space between the first mold 2 and the contact lens 10 and between the second mold 8 and the contact lens 10 .

5 shows the laser irradiation step according to the present invention.

When the polymerization reaction of the monomer 10 is completed, a step of fixing the first mold 2 and the second mold 8 bonded to each other to a jig 12 is performed.

While the rear end of the second mold 8 is fixed to the jig 12 , the convex portion 6 of the first mold 2 is positioned to face forward.

When the fixing of the second mold 8 to the jig 12 is completed, the step of irradiating the laser 14 toward the convex portion of the first mold 2 is performed.

The laser 14 passes through the first mold 2 , the monomer 10 , that is, the contact lens and the second mold 8 in sequence. At this time, the laser 14 is irradiated perpendicular to the convex portion (6).

A perforation hole 16 is formed in the contact lens 10 by the laser 14 .

In the step of forming the perforations 16 in the contact lens 10 by the laser 14 , the perforations 16 are spaced apart from each other at a predetermined angle in the radial direction of the contact lens 10 to form a plurality The shape and number of the punching spheres 16 and the spacing angle and distance between the plurality of the punching spheres 16 may vary according to the intention of the manufacturer.

6 is a cross-sectional view of a drilling tool processed in a contact lens according to the present invention.

When the hole 16 is formed by the laser 14 , the contact lens 10 is compressed and fixed to the first mold 2 and the second mold 8 , so the contact lens 10 is ) by the laser 14 applied to the thermal reaction is suppressed.

Therefore, as shown in FIG. 7 , when the conventional processing method of processing the punching tool 18 by directly irradiating the laser 14 to the contact lens 10 is applied, damage caused by the laceration occurring around the punching tool 18 . And it is possible to prevent a burr phenomenon.

8 shows the steps of completing the manufacturing of the contact lens according to the present invention.

When the step of forming the perforation hole 16 in the contact lens 10 by the laser 14 is completed, the first mold 2 and the second mold 8 are separated and the contact lens 10 is will complete the manufacture of

In the foregoing detailed description of the present invention, although it has been described with reference to preferred embodiments of the present invention, those skilled in the art or those having ordinary knowledge in the technical field have the spirit of the present invention described in the claims to be described later And it will be understood that various modifications and variations of the present invention can be made without departing from the technical scope.

Claims

preparing a first mold forming a front surface of the contact lens and a second mold forming a rear surface of the contact lens;

injecting a liquid-phase monomer, which is a raw material for the contact lens, into the concave portion of the first mold;

coupling the second mold to the first mold so that the first mold and the second mold overlap each other;

polymerizing the monomer;

fixing the first mold and the second mold coupled to each other to a jig;

irradiating a laser toward the convex portion of the first mold;

forming a perforation hole in the contact lens by the laser;

separating the first mold and the second mold;

Completing the manufacturing of the contact lens; to include

A punching tool processing method, characterized in that.
According to claim 1,

In the preparation step of a first mold forming the front surface of the contact lens and a second mold forming the rear surface of the contact lens,

The first mold and the second mold are punched tool processing method, characterized in that formed by a cast mold (cast mold) casting method.
According to claim 1,

In the step of liquid-injecting the monomer, which is the raw material of the contact lens, into the concave portion of the first mold,

The monomer is a drilling tool processing method, characterized in that HEMA (2-Hydroxyethylmethacrylate).
According to claim 1,

The temperature applied to the monomer in the step of the polymerization reaction of the monomer is a drilling ball processing method, characterized in that at least a certain temperature.
5. The method of claim 4,

In the step in which the monomer is polymerized, the monomer is solidified.
6. The method of claim 5,

In the step of polymerization reaction of the monomer,

The first mold and the second mold are perforated tool processing method, characterized in that having a higher strength than the polymerization-reacted monomer.
7. The method of claim 6,

The monomer solidified in the step of polymerization of the monomer is a punching tool processing method, characterized in that the compression fixed to the first mold and the second mold.
According to claim 1,

In the step of irradiating a laser toward the convex portion of the first mold,

The laser is a drilling tool processing method, characterized in that through the first mold, the monomer and the second mold sequentially.
9. The method of claim 8,

In the step of irradiating a laser toward the convex portion of the first mold,

The laser is a punching tool processing method, characterized in that irradiated perpendicular to the convex portion.
According to claim 1,

In the step of forming a hole in the contact lens by the laser,

The punching ball processing method, characterized in that the plurality of punching balls are spaced apart from each other at a certain angle in the radial direction of the contact lens.
[Claim 11] A contact lens formed with a punched sphere processed by the punching sphere processing method of any one of claims 1 to 10.