JPS636521A - Manufacture of rimless spectacles - Google Patents

Abstract

PURPOSE:To exactly and easily work a lens by providing a drilling indication mark for indicating clearly a hole position of the lens, and a fastener which can correct the hole position, etc. CONSTITUTION:In case of joining a spectacle frame and a lens 3, the lens is placed on an indicating mark in which a drilling position for a fastener 4 and an appointed position have been brought to drawing, and drilling position information is obtained and a hole is made. Subsequently, by the fastener 4 and a fixing tool 5, the lens 3 and the spectacle frame are screwed. As for an edge part of the lens 3, a lens edge holding material whose tip has been curved abuts on, and in the direction of 90 deg. to the edge part, the lens surface is fixed by the lens holding material. Accordingly, when the lens 3 has been moved upward and downward, the upward and downward force applied to the lens holding part of the fastener 4 is transferred to the lens edge holding material. However, since the lens holding material is abutting on the lens edge, its force is obstructed by the edge of the lens 3 and the fastener 4 does not move. In this way, by placing the lens 3 against the indicating mark, an actual wearing state of spectacles can be known, therefore, at the time point when the lens 3 has been brought to edge rubbing before manufacturing the spectacles, a working state of the optical center can be compared correctly.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method of manufacturing rimless eyeglasses.

(Conventional technology) Rimless glasses have bridges, pads, endpieces, temples,
Consists of eyeglass frames and lenses made of fasteners,
Manufacturers combine lenses and eyeglass frames and supply them as finished products to optical stores.

In particular, the processing procedure for rimless glasses that use vision correction lenses is that after the manufacturer receives an order, the manufacturer selects the specified lens power and eyeglass frame, and then cuts the lenses into a wooden shape to fit the eyeglass frame. Next, drill a screw hole to secure the lens. At this time, in order to secure the eyeglass frame and lens without any play, it is necessary to drill holes at the specified screw hole positions accurately.

Therefore, manufacturers created an accurate outer frame to match the lens shape, fixed the frame on a drilling machine, fitted the lens into the frame, and drilled screw holes.

That is, in order to eliminate errors caused by drilling, machining is performed using a numerically controlled wire cutter, a numerically controlled milling machine, or other dense machining equipment to eliminate machining errors as much as possible. However, since this processing method is very expensive, it has been an obstacle to the widespread use of frameless eyeglass frames for vision correction based on prescriptions.

In addition, in this eyeglass manufacturing method, the most important point is that the eyeglass frame and lens must be firmly fixed, and for this purpose, the shape of the bridge parts must be determined at the O side bridge mounting part. The hole in the lens must be positioned accurately, and the shape and length of the stopper are determined by the connection between the hole on the ear side of the lens and the lens stopper. Therefore, if the hole position is shifted towards the ear side, the stopper will not be firmly fixed to the lens and a gap will be created between the lens and the stopper, and when wearing these glasses,
The temple becomes unstable, the lens moves up and down, the viewpoint becomes unstable, and a good wearing feeling cannot be expected.

For this reason, as a method of firmly fixing the stopper,
No. 0-2568 discloses a technique in which a plurality of small holes are formed and fixed with small screws.

(Problem to be solved by the invention) However, with the technology described in the above publication, if the position of the hole shifts due to manufacturing errors, there is no room for adjustment at all, and a new lens processing has to be performed. Things you shouldn't do.

In addition, when it comes to joining lenses and eyeglass frames, we rely on the long experience of experts to determine the optimal joining of lenses and the position of the holes, so if one lens is damaged, it is difficult to replace the lens. It was difficult to reproduce the same lens as the previous one, so the only option was to accurately measure the position of the hole in one lens.

The present invention has been made to improve the above-mentioned problems, and the first purpose is to provide a method for determining the hole drilling position of a lens by a simple method, and the second purpose is to Another object of the present invention is to provide a simple method for manufacturing rimless eyeglass frames by providing a hole-fixing method that can correct even when the hole position shifts due to manufacturing errors.

(Means for Solving the Problems) The present invention has been made to solve these problems, and is composed of a lens and an eyeglass frame consisting of a bridge, a pad, an endpiece, a lens stopper, and a temple. Greenless glasses are made up of a lens edge holder that stands upright in the shape of a beam with a variable curvature angle, and a lens holder that has a lens through hole at the tip and whose @ end is joined to the edge holder. Using the formed lens stopper and a fixing tool for fixing the retaining shell to the lens, the hole drilling position information is obtained from an indicator drawn with the hole position for the lens stopper and the eye point position, and the lens and eyeglass frame are assembled. It is characterized by joining.

(Function) To join a rimless eyeglass frame and a lens, place the lens on the indicator on which the hole position for the lens stopper and the eye point position are drawn, obtain the hole position information, make the hole, and then attach the lens stopper. A lens and a spectacle frame are screwed together using a tool and a fixing tool. The edge of the lens is in contact with a lens edge presser with a curved tip, and the lens surface is fixed by the lens presser in the 90'' direction with this edge, so when the lens is tilted up or down, The vertical force applied to the lens holding part of the lens stopper is transmitted to the lens edge holding material, but since the lens holding material is in contact with the lens edge, the force is blocked by the lens edge and the lens stopper is It does not move. By placing the lens on the indicator, you can check the actual wearing condition of the glasses, so when the lenses are edge-processed before the glasses are manufactured, it is possible to properly fill and process the optical center without deviation. You can compare whether it worked or not.

(Example) Examples of the present invention will be described in detail below.

FIG. 1 shows a rimless eye 1Ili manufactured by the manufacturing method of the present invention, and the eye v11 is assembled from a metal eyeglass frame 2 and a plastic lens 3 made of diethylene glycol bisallyl carbonate resin.

The eyeglass frame 2 is composed of a stopper 4, a fastener 5, an endpiece 6, a temple 7, a bridge 8, and a pad 9, and the left and right lenses are connected via the bridge 8, the fastener 4, and the fastener 5. , the left and right temples 7 each have the same stopper 4.
and fixture 5 are manufactured using the same fixing method.

In addition, the armor 6 is Blanka Z (copper, nickel, zinc,
The temple 7 and the bridge 8 are made of a high nickel alloy, and the pad 9 is made of nickel silver.

The shapes of the bridge 8, temples 7, endpieces 6, and pads 9 are those of ordinary eyeglass parts, and the manufacturing method for assembling the eyeglass frame from each of these parts is carried out by an ordinary known method.

The characteristic manufacturing method will be described below.

A monomer mainly composed of diethylene glycol bisallyl carbonate is polymerized to form a lens 3a with a 19-sided shape.
(Not shown in Figure 2. For example, refractive index 1.499, power -1,
00 diopters, diameter 75φ) using a lens meter (not shown) and a layout marker (not shown),
After the lens layout is performed, edges are milled into a desired shape using a lens milling machine (not shown) to obtain a lens 3b as shown in FIG.

This edge processing is a commonly used method, and as mentioned above, it is performed using a lens processing machine (not shown) and the lens end face is cut using a long processing method. A template 3c (FIG. 3) of a desired frame shape is prepared in advance, and processed according to its shape and lens layout.

The lens layout positions the eye point 1 to (the optical center of the lens) of the lens after edge processing based on the prescription and lens information, etc., and includes the interpupillary distance, apex refractive power for near and far vision, and astigmatic axis direction. It is determined by prescription and lens information such as astigmatism refractive power, eccentric gravity, etc.
This is done using an eyeglass device such as a layout marker.

Next, the hole-drilling position of the lens 3b is determined using the indicator 10 shown in FIG. 4.

(shown in Figure 11'5) That is, in order to join the lens 3 and the eyeglass frame 2, the stopper 4 is
, fixing tool 5, on the lens, and in the method for manufacturing a rimless eyeglass frame,
The most important points are the accuracy of the positioning and the viscosity of the positioning of the hole.If there is an error in this, it will not be possible to manufacture glasses that match the prescription, and especially in the case of prescription glasses, the effectiveness of the glasses for correcting vision will be affected. Doesn't play.

The indicator 10 in FIG. 4 has a lens shape 11 (11a,
11b), stopper hole point 12 (12a).

12b, 12c, 12d), center line 13 (13a.

13b), grid lines 14 (14a, 14b), and a frame size display 15. The lens shield 11 is printed to have the same size and shape as the actual eyeglass lens frame, and is centered around the center line 13a. It is symmetrical as follows.

Frame resize display 15 indicates the frame size displayed by the boxing system, such as 55014 or 58014.Display 55014 indicates that the outer width of the frame is 14M and the width of the lens shake is 55NR.
The center line 13a is located at the center between the inner edges of the left and right lens shapes 11a and 11b, and similarly, the center line 13b is a line that bisects the lens shape 11 in the vertical direction and is called a datum line (boxing). system display).

The horizontal scale indicated by the grid lines 14a and 14b is 13a (
The vertical scale indicates the vertical distance from the datum line, allowing the optical center for continuous vision and near vision to be displayed. Stopper hole point 12 (12a
, 12b, 12c, and 12d) are disposed, for example, at a distance 1lI3.2 im from the opposing lens shapes 11, respectively.

Next, buy a lens 3 with a beaded edge on the indicator 10,
The frame shield is aligned according to the indicator 1o, and the lens hole drilling position is marked with paint (as shown in FIG. 5). At this time, it is also checked whether the eye point (optical center of the lens) and the center of the eyeglass wearer's pupil are aligned using the grid-like lines drawn in the wooden pattern.

In addition, if the frame PD (distance between the left and right eye points when the frame is assembled) is too large,
It can also be used as a guideline for determining the cutting a when cutting the 0 side edge of the lens to match the frame PD.

Furthermore, by comparing the optical center of the lens and the pupil center position on the indicator before the edge edging process, a lens with an appropriate outer diameter can be selected.

The drilling position of the instruction aio is, for example, 3.2 #l from the outer periphery.
Vertical upward from the datum line is the stopper hole (12a) on the ear side.
, 12G), for example, 8tar, and the stopper hole on the IJ side (12G).
b, 12(1), for example at 9M. The reason for this is that if the distance is within 3 m from the outer periphery of the lens, the outer periphery will be too close to the outer periphery during drilling, making the edge more likely to chip, and the bonding strength between the metal fitting and the lens will also weaken, making the hole more likely to break.

The position above the datum line is not particularly limited and depends on the size of the frame, but it is preferably about 4 m to about 12 m depending on the design balance with the lens at the bridge position.

Next, drilling is performed using a drill.

These steps (1) and (2) are performed using a normal eyeglass lens drilling machine (not shown, for example, Drill Master manufactured by Hoya Co., Ltd.). (The mechanical operation method will not be described in detail.) The outer surface of the lens hole should be chamfered, and it is preferable to chamfer the outer surface of the lens hole evenly around the lens hole in order to prevent cracks, etc. that are likely to occur from the outer surface. . The number of holes is
Each lens has one bridge-side joining stopper hole and one temple-side joining stopper hole.

Next, a method of joining a lens to a lens hole provided by this drilling process using a lens stopper and a fixture will be described.

First, the connection state with the lens hole on the temple side will be explained.

FIG. 6 shows a parts diagram of the stopper 4 and the endpiece 6. When attaching the stopper 5 to the lens hole, the work process involves attaching the eyeglass frame parts on the temple side (temple 7, endpiece 6,
It is effective to assemble the stopper 4) or the eyeglass frame parts on the bridge side (bud 9, bridge 8, stopper 4) in advance and then assemble the lens and assembly stand as the final step. (However, the order of assembly is optional.)
As shown in FIG. 6, the stopper 4 has a shape in which a lens presser plate 4a and a lens edge presser plate 4b are combined into a single character shape, and are integrally molded. The tip of the holding plate 4a is provided with a mounting hole 4C corresponding to a lens hole (not shown), and the other end is curved and connected to the side surface of the edge plate 4b. The fastener 4 is made of, for example, a high nickel material (containing 90% Ni and 10% Cr) to strengthen its rigidity and prevent deformation due to the general pressure applied when wearing glasses. It is possible to adjust the deformation by gradually applying partial pressure with a tool including the like. In addition, the endpiece 6 has a hinge 6a formed at its tip for joining with the temple 7, and a stopper 4 at the other end.
It has a curved portion 6b to be joined to the holder 4, and is joined to the stopper 4 by pressing the yaw 6 in the direction and brazing to assemble the stopper shell for joining on the temple side.

The fixture 5 has a screw 7a (for example, outer diameter 1.44III+)
, sleeve 7b with nylon washer (for example, outer diameter 1.8
NR), and is fixed to the lens in the state shown in FIG.

FIG. 8 is a cross-sectional view showing the joined state of the lens 3, the stopper 4, and the fixture 5, and shows the lens edge pressing plate 4b of the stopper 4.
is brought into contact with the edge surface of the lens 3, and the lens surface is pressed with the lens holding plate 4a from the concave side of the lens 3, and the lens hole and the mounting hole 4C provided at the tip of the lens holding plate 4a are connected. In this state, remove the screw 7 from the convex side of the lens 3.
a, pass it all the way to the lens press plate 4a, and remove the lens press plate 4a from the outside of the lens press plate 4a using the washer 7C.
and firmly tighten lens 3. At this time, the entire surface of the lens edge presser plate 4b must be in contact with the lens edge so that the lens edge presser plate 4a cannot move up and down. However, if the hole is misaligned due to inaccurate drilling, especially if the lens hole is biased towards the outer periphery of the lens (
The state indicated by the broken line in FIG. 9) is the state shown by the broken line in FIG.
Correction is made by pressing both ends of the lens in the b direction using a tool such as pliers, and bending the lens so that both ends come into contact with the lens edge. That is, in rimless glasses, the material of the stopper is the joint between the lens and the frame, and is required to have rigidity that can withstand deformation strength. % and other copper), and the shape of the stopper is made into a single-letter shape, thereby strengthening the joint strength and allowing for partial deformation to a certain extent. In addition, if the position of the lens hole is too far inside the lens and the lens stop plate of the stop shell is misaligned with the lens hole, you can partially remove the edge of the lens with a beading machine, etc. to adjust the hole position. It is also possible to make adjustments.

FIG. 10 shows the assembly of the joining parts on the bridge side. The stopper 4 and the bridge 8 have already been joined by brazing, and the pad arm 9 is attached to the bridge part of this part.
a. Pad box 9b.

The pad component 9, which is composed of a pad plate 9c and a pad plate 9d, assembled as shown in FIG. 10, is brazed in eight directions to assemble the bridge-side joint component.

This joint is then assembled in a manner similar to that used for the temple-side joint described above, and using similar fixtures.

The rimless eyeglass frame 1 shown in FIG. 1 is manufactured by the above method.

(Effects of the Invention) As described above, according to the method of the present invention, the combination of a drilling indicator that clearly indicates the hole position of the lens and a structure of a stopper that allows the hole position to be adjusted allows expensive machinery and technology to be used. Lenses for rimless glasses can be processed easily and accurately without using it. As a result, it is now possible to assemble rimless glasses, which was previously possible only at manufacturers with large-scale facilities, at general eyeglass stores, resulting in great economic benefits and time savings. Even if the lenses are damaged, replacement lenses can be easily replaced, and lightweight rimless glasses with a wide field of vision can be provided.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of rimless eyeglasses manufactured by the method of the present invention, FIG. 2 is a perspective view of the lens of the embodiment of FIG. 1, and FIG. 3 is a frame of the embodiment of FIG. 1. Fig. 4 is a diagram of the indicator of the embodiment shown in Fig. 1, Fig. 5 is a manufacturing process diagram of the embodiment shown in Fig. FIG. 7 is a partially enlarged view of the embodiment shown in FIG. 1; FIG. 8 is a cross-sectional view showing the joined state of the temple side of the embodiment shown in FIG. 1; FIG. 10 is an assembled view of the bridge side of the embodiment shown in FIG. 1. FIG. 1... Rimless glasses, 2... Glasses frame, 3... Lens, 4... Stopper, 5... Fixed (1, 6... Endpiece, 7... Temple, 8... ...Bridge, 9...-Pad, 1o...Indicator.

Claims (1)

[Scope of Claim] A method for manufacturing rimless eyeglasses consisting of a lens and an eyeglass frame consisting of a bridge, a pad, an endpiece, a lens stopper, and a temple, comprising: a lens edge holder erected in the shape of a beam with a variable curvature angle; and a lens holding member having a lens through hole at its tip and joined to the edge holding member at the other end, and formed into a T-shape, and a fixture for fixing the stopper to the lens. A method for manufacturing rimless eyeglasses, characterized in that the lens and eyeglass frame are joined by obtaining the hole position information from an indicator depicting the hole position for a lens stopper and the eye point position.