JP2003202527A - Method of forming notches of spectacle lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of forming notches of spectacle lenses which can exactly and easily position the lenses and can constantly maintain quality. <P>SOLUTION: A prepared demonstration lens 12A has the same notched part 36A as the notches 36 of the lens 12 to be fabricated and is formed to the shape and size approximately the same as those of the lens 12. The lens 12 and the demonstration lens 12A are respectively bored with a lens through-hole 38 and a demonstration lens through-hole 38A. The lens 12 and the demonstration lens 12A are superposed on each other. Positioning rods 68 and 70 are respectively inserted into the lens through-hole 38 and the demonstration lens through-hole 38A, by which the lens 12 is positioned. An exposed part 72 of the lens exposed to the inner side of the notch 36A of the lens of the positioned demonstration lens 12A is chipped along the notch 36A by an electric drill 80 or the like. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a notch in a spectacle lens, and more particularly to a method for forming a notch in a spectacle lens for processing the notch at the peripheral edge of the lens.

[0002]

2. Description of the Related Art In a conventional method for forming a cutout portion of an eyeglass lens, which is the background of the present invention, after marking a desired position on the peripheral edge portion of the eyeglass lens, while gripping the lens,
It was to cut the marked part with a file.

[0003]

However, in such a conventional method, it is difficult to accurately position the lens because the lens is scraped with a file while holding it by hand, and sometimes a mark is added. There was a risk of cutting away from the position. In this case, depending on the skill level of the operator, the shaving condition varies, and it is difficult to keep the quality constant. Therefore, it was unsuitable for mass production. In addition, it takes a lot of time to mark the lens each time, and since it is a work by hand such as sanding, the work time for each piece is long.

Therefore, a main object of the present invention is to provide a method for forming a notch in a spectacle lens, which enables accurate and easy positioning of the lens and also keeps quality constant. is there.

[0005]

According to a first aspect of the present invention, there is provided a step of preparing a lens having a predetermined lens shape, a step of forming a lens through hole at a predetermined position of the lens, and a step of forming the lens. In order to form a notch at a desired position on the peripheral edge, a step of preparing a demo lens that is formed to have substantially the same shape and size as the lens and has the same notch as the notch, and the lens and the demo lens The demo lens through hole that allows communication with the lens through hole when they are stacked in the plane direction is opened, and the lens and demo lens are stacked in the plane direction. A positioning step of inserting a positioning rod into the lens through hole and the demo lens through hole, and positioning the position of the cutout portion of the demo lens. The exposed portion of the lens exposed to the inside of the notch of Morenzu along the notch of the demo lens,
A method for forming a notch in a spectacle lens, comprising a cutting step of cutting from a peripheral edge surface of the lens. Claim 2
The present invention according to claim 1 is a method of forming a notch in an eyeglass lens according to the invention of claim 1, wherein a protective member is provided on one main surface and / or the other main surface of the lens before the step of punching the lens. It is characterized by including a step of arranging. A third aspect of the present invention is a method for forming a notch portion of a spectacle lens according to the first or second aspect of the present invention, wherein the cutting step applies a drill to a peripheral edge of the lens in the exposed portion. After the step of abutting the drill and the step of abutting the drill,
Displacement step of displacing the drill in the cutout direction of the cutout portion of the demo lens. The present invention according to claim 4 is a method for forming a notch portion of an eyeglass lens according to the invention of claim 1 or claim 2,
The drill abutment step includes a step of obliquely abutting the drill with respect to the peripheral edge surface of the lens in the exposed portion. It is characterized by including a step of swinging one end side in the axial direction of the drill as a fulcrum toward the notch direction of the notch portion of the demo lens. A fifth aspect of the present invention is a method for forming a cutout portion of an eyeglass lens according to the fourth aspect of the invention, wherein the positioning step includes a support base that supports one end side of the positioning rod in the axial direction, Among the positioning rods inserted into the through holes and the demo lens through holes, one positioning rod is fixed to the support base, one positioning rod is used as a fulcrum, and the other demodulating rod and the superimposed demo lens and lens are It is characterized by including a rotating step of rotating around the positioning rod. A sixth aspect of the present invention is a method for forming a notch portion of a spectacle lens according to any one of the first to fifth aspects,
The drill is characterized by being an electric drill. A seventh aspect of the present invention is a method for forming a notch portion of an eyeglass lens according to the first or second aspect of the present invention, wherein the cutting step is performed with a space from a peripheral edge of the lens of the exposed portion, It is characterized by including a cutting step of cutting the notch on the peripheral edge surface of the lens by disposing the electric drill at a position facing the notch, and then displacing the demo lens and the lens that are superposed on each other toward the electric drill. There is.

[0006]

In the present invention according to claim 1, the prepared demo lens has the same notch as the notch of the lens to be processed, and is formed to have substantially the same shape and size as the lens. Through the hole forming step, a lens through hole and a demo lens through hole are formed in the lens and the demo lens, respectively. By the superposing process, the lens and the demo lens are superposed in the surface direction. In this case, the demo lens through hole and the lens through hole are communicated with each other. Further, since the positioning rod is inserted through the lens through hole and the demo lens through hole in the positioning step, the position of the notch portion to be processed into the lens is accurately positioned by the notch portion of the demo lens. Then, in the cutting step, the exposed portion of the lens exposed inside the cutout portion of the positioned demo lens is cut from the peripheral edge surface of the lens along the cutout portion of the demo lens. As a result, a notch portion of the spectacle lens is formed at a desired portion on the peripheral edge surface of the lens. In the present invention according to claim 2, since the protective member is arranged on the one main surface and / or the other main surface of the lens before the hole forming step of the lens, when the notch is formed in the lens by the cutting step, Protect one principal surface and / or the other principal surface of the lens. Therefore, it is possible to prevent the one main surface and / or the other main surface of the lens from being damaged. According to the third aspect of the present invention, since the drill is brought into contact with the peripheral edge of the lens in the exposed portion in the drill contacting step, the initial positioning at the time of cutting is further ensured. Further, in the displacement step, the drill is displaced in the notch direction of the notch portion of the demo lens, so that the notch portion serves as a guide groove and cutting can be performed accurately. In the present invention according to claim 4, after the drill is brought into contact with the peripheral edge surface of the lens at the exposed portion obliquely, one of the axial directions of the drill is set with the contact portion between the drill and the peripheral edge surface of the lens as a fulcrum. Since the end side is swung toward the notch direction of the notch portion of the demo lens, the rocking action enables more stable cutting. According to the fifth aspect of the present invention, since the one end side of the positioning rod in the axial direction is supported by the support base, the demo lens and the lens which are superposed can be stably supported. In addition, the rotating step makes it possible to rotate the demo lens and the lens, which are superposed together with the other positioning rod, with the one positioning rod as a fulcrum around the one positioning rod. It becomes possible to arrange a lens. In the present invention according to claim 6, since the cutting is performed by the electric drill, the cutting time can be shortened as compared with the cutting by hand machining such as a file. In the present invention according to claim 7, after disposing the electric drill at a position facing the cutout portion at a distance from the peripheral edge of the lens of the exposed portion, the demo lens and the lens that are superposed are displaced to the electric drill side. As a result, the notch is provided on the peripheral edge surface of the lens, that is, the notch can be easily cut by displacing only the lens side.

The above-mentioned objects, other objects, features and advantages of the present invention will be more apparent from the following detailed description of embodiments of the invention with reference to the drawings.

[0008]

DETAILED DESCRIPTION OF THE INVENTION

EXAMPLES The present invention relates to a method for forming a notch in a spectacle lens. In this example, first, spectacles to which the method for forming a notch in a spectacle lens according to the present invention is applied will be described. . FIG. 1 is a front view solution diagram showing an example of eyeglasses to which a method for forming a notch portion of an eyeglass lens according to the present invention is applied. 2 is an enlarged cross-sectional schematic view of the main part of the spectacles shown in FIG. 1 when viewed from the plane side, and FIG.
FIG. 3 is an exploded diagrammatic view of a main part of the glasses shown in FIGS. 1 and 2 when viewed from the plane side.

The spectacles 10 according to this embodiment include a pair of left and right two lenses 12. The lens 12 is the front 14
Mounted on. The front 14 includes a tip 16 and a bridge 18. The two lenses 12 are locked to the lens stoppers 20 of the tip 16 on both sides of the front 14 in the longitudinal direction. Further, the two lenses 12 are locked to the lens stop portion 20 of the bridge 18 on the center side in the longitudinal direction of the front surface 14. The lens 12 has a lens set screw 22.
Is fixed to the lens stopper 20.

A temple 26 is rotatably arranged on the tip 16 via a hinge portion 24. Tomo 16
A part thereof includes a semi-bent body 28 that is bent toward the temple 26. The lens stopper 20 is disposed on one side of the semi-bent body 28. The lens stop portion 20 is provided so as to extend from one end surface of the semi-bendable body 28 to the front surface side of the spectacles
A base 30 that serves as a seating surface for the lens 12 is included. Base 30
Is about half of the thickness of the one end surface of the semi-bending body 28, for example. The base 30 has a screw hole 32 penetrating from one main surface to the other main surface. The inner peripheral surface of the screw hole 32 has, for example, a valley diameter of 2.0 mm and an inner diameter of 1.6 mm.
Female thread is formed. Furthermore, on the upper surface of the base 30, for example, a U-shaped claw piece 34 in a front view extending from one end surface of the semi-bent wisdom body 28 in the same direction as the longitudinal direction of the base 30.
Is provided.

The lens 12 has a semicircular cutout portion 36 in a front view at one end edge and the other end edge thereof in the longitudinal direction. Further, the lens 12 has a lens through hole 38 having a circular cross section, which penetrates the main surface of the lens 12, on one end side and the other end side in the longitudinal direction thereof and in the vicinity of the cutout portion 36.
The lens through hole 38 is arranged at a position corresponding to the screw hole 32 of the base 30. The lens 12 has a base 3 so that the notch 36 is engaged with the claw piece 34 of the tip 16.
0 is placed on the upper surface. At this time, the lens through hole 38 of the lens 12 and the screw hole 32 of the base 30 are arranged such that their hole centers are on the same straight line. Furthermore, lens set screw 2
2 is inserted into the lens through hole 38, and the base 30
The lens 12 is fixed to the tip 16 by being screwed into the screw hole 32.

The lens set screw 22 includes a head portion 40 and a core portion 4.
Including 2 and. The head portion 40 has a cross portion or the like 44. The head 40 and the core 42 are integrally formed of, for example, a metal material. Further, a covering portion 46 made of, for example, a plastic material is formed around the portion of the head portion 40 except at least the upper surface and the core portion 42. Coating 4
6 has a function as a shaft portion of the lens set screw 22,
The outer peripheral surface has a male screw portion 48. The core portion 42 has a function as a reinforcing core material for the covering portion 46. The lens setscrew 22 may be appropriately formed by insert-molding a reinforcing core material made of a metal material inside a machine screw having a cross hole and a machine screw having a cross hole, which are made of a resin material. The lens set screw 22 is, for example, the head 4
The covering portion 46 including 0 has an axial length of 15 mm, the head portion 40 has a diameter of 3 to 3.5 mm, and the covering portion 46 has a diameter of about 2.0 mm.

In the spectacles shown in FIGS. 1 to 3, the lens 12 is fixed to the tip 16 by the lens fixing portion 20 and the lens fixing screw 22, and in particular, the notch portion 36 of the lens 12 is formed.
Is engaged with the claw piece 34 of the tip 16, and is further fixed by the lens set screw 22. Therefore, the lens 12 is more firmly fixed to the tip 16. The lens 12 is also firmly fixed to the bridge 18 by the same method. The core portion 42 of the lens set screw 22 is formed with a mesh-shaped, spiral-shaped concave and convex groove portion on the outer peripheral surface thereof, and the covering portion 46.
Those having a strong adhesiveness with may be used.

On the other hand, a hinge portion 24 for rotatably connecting the temple 26 is arranged on the other side of the semi-bent body 28 of the tip 16. The hinge part 24 is a semi-bent body 2
8, a top portion 50 extending from the other end, a top portion 52 extending from the tip of the temple 26, and a pivot portion 5 rotatably supporting the top portion 50 and the top portion 52.
Including 4 and.

The tip portion 50 of the tip 16 is a semi-bent tip body 28.
Including, for example, two top pieces 50a which are arranged at intervals in the thickness direction of the other end portion of the two top pieces 50a, 5
0a is formed in a substantially U-shaped plate piece. One of the top pieces 50a is connected to one main surface (upper surface) of the semi-bending tip body 28, and the other top piece 50a is connected to the other main surface (bottom surface) of the half-bending tip body 28. For example, a semicircular arc-shaped portion 51a is formed on the tip end side of each of the two top pieces 50a.

The top 52 of the temple 26 includes, for example, one top piece 52a extending from the root end of the temple body 26A, that is, the end opposite to the temple end (temple tip). The top piece 52a is formed in a substantially U-shaped plate piece like the top piece 50a. The top piece 52a is arranged at the root end of the temple body 26A and in the middle in the thickness direction. Furthermore, the two pieces 50a of the wisdom 16 and the piece 52a of the temple 26
Each of them has an axial hole 54 penetrating its main surface.

Further, a temple collar 56, which is separated from the outer peripheral surface of the top piece 52a, is disposed from the root end of the temple body 26A. The temple collar portion 56 is provided so as to extend forward from a root end portion on the outside of the temple body 26A. In this case, at the base of the temple 26, the top piece 52a
An arcuate portion 58 slidable with the arcuate portion 51a of the top piece 50a is formed on both sides of the temple main body 26A from the root end surface to the inner side surface of the temple collar 56.
The temple collar 56 is preferably configured to have a shape along the outer peripheral surfaces of the two top pieces 50a, that is, along the opening / closing direction of the temple 26. For example, in the present embodiment, the temple collar 56 has an arcuate cross section. It is preferably formed.

Then, one top piece 52a of the temple 26 is held between the two top pieces 50a of the tip 16.
At this time, the shaft holes 54 of the two top pieces 50a and the top piece 52a are arranged such that their hole centers are on the same straight line. Further, a pivot shaft portion 60 made of, for example, a pin is inserted into the shaft hole 54. The pivot portion 60 rotatably supports the two top pieces 50a and the top piece 52a. That is, by the action of the hinge portion 24, the wisdom 16 and the temple 26
And are rotatably connected.

In this embodiment, the semi-bent wisdom body 28, the base 30, the claw piece 34, the top piece 50a of the tip 16, the temple body 26A, the top piece 52a of the temple 26, and the temple collar portion 5.
The 6 and the pivot part 60 are formed of, for example, a plastic material, but it is particularly preferable that the 6 and the pivot portion 60 are formed of a hard plastic material.

In the temple opening / closing structure of the spectacles 10 of this embodiment, for example, as shown by the chain double-dashed line in FIG. 2 and FIG.
When the temple 26 is opened to the maximum, the abutment 100 where the tip 16 and the temple 26 come into contact with each other is a straight line that is substantially parallel to the longitudinal direction of the front 14 and passes through the rotation center 24A of the hinge portion 24 (hereinafter referred to as a reference straight line. ) When the position on RL is taken as the reference position, when the temple 26 is opened to the maximum, the abutment 100 is biased to the side of the tip 16 rather than on the reference straight line RL at the reference position. The wisdom 16 and the temple 26 are arranged. In this case, when the temple 26 is opened from the closed state to the maximum, for example, as shown in FIG. 2, the temple collar 56 slides along the outer peripheral surfaces of the two top pieces 50a of the wisdom tooth 16, for example. The abutment end face 62 of No. 26 and the abutment end face 64 of the wisdom 16 side contact.

In the above-mentioned spectacles 10, when adjusting the opening angle of the temple 26 according to the width of the user's face, first, the temple 26 is rotated in the closing direction to bring the temple 26 and the wisdom 16 into contact with each other. Move away from the state. Then, among the contact surfaces of the abutment 100, the abutment end surface 62 on the temple 26 side, that is, the tip end surface of the temple collar 56 is ground with a cutting tool such as a file or a grinding / polishing tool to appropriately adjust the opening angle of the temple 26. Get monkey

In this case, if the tip end face (abutment end face) 62 of the temple collar 56 which is in contact with the abutment end face 64 on the wisdom 16 side is shaved, the opening angle of the temple 26 can be made larger than that before it is shaved. You can That is, the temple collar 5
When the temple 26 is opened to the maximum after the shaving, the amount of the shaving of the temple collar 5 is larger than that before the shaving of the front end surface 62 of the temple.
As the length of 6 is shortened, the temple 26
The range of rotation in the opening direction is widened. Therefore, the opening angle of the temple 26 can be increased. Since the temple collar portion 56 is arranged apart from the outer peripheral surface of the top piece 52a of the temple 26, the temple collar portion 56 can be compared with the case where the hinge portion 24 and the temple collar portion 56 are close to each other. It is possible to easily grind off with a file. Therefore, it is possible to prevent the hinge portion 24 from being carelessly cut and damaged.

In this embodiment, the length of the temple collar 56 spaced from the outer peripheral surface of the top piece 52a is, for example, 1.
The length of the temple collar 56 is set to about 2 to 1.5 mm, depending on the opening angle of the temple 26.
The settings can be changed as appropriate.

Next, a method of forming and processing the cutout portion 36 of the lens 12 of the spectacles 10 will be described. Figure 4
FIG. 3 is an exploded perspective view showing the steps of an embodiment of a method for forming a notch in a spectacle lens according to the present invention. Figure 5
It is a perspective view of the state where the process shown in FIG. 4 was completed. Figure 6
5 shows a state in which the process shown in FIG. 4 is completed.
It is a partial cutaway front view solution figure.

First, a lens 12 with a degree having a predetermined sphere shape is prepared. Further, in order to form the cutout portion 36 at a desired position on the peripheral edge portion of the lens 12, the cutout portion 3 of the lens 12 is formed to have substantially the same shape and size as the lens 12.
A demo lens 12A having a notch portion 36A having the same shape and structure as 6 is prepared.

In this case, for example, a sheet-shaped or film-shaped protective member (not shown) is detachably arranged on the one main surface and the other main surface of the lens 12. The protective member protects the one main surface and the other main surface of the lens 12 during a hole making step and a cutting step described later. It should be noted that this protective member may be arranged at least on the surface which will be the contact surface between the lens 12 and the demo lens 12A in the overlapping step described later.

Further, the lens 12 is provided with a lens through hole 38 at a predetermined position, and similarly, the demo lens 12
A demo lens through hole 38A is also formed in A. In this case, the lens through hole 38 and the demo lens through hole 38A are respectively formed so that the lens through hole 38 and the demo lens through hole 38A can communicate with each other when the lens 12 and the demo lens 12A are superposed on each other in the main surface direction. Can be opened [drilling process]. The lens through hole 38 and the demo lens through hole 38A have a hole diameter of, for example, about 2.0 mm. In addition, the lens 12 in which the lens through hole 38 is previously formed, and the demo lens through hole 3 in advance.
The demo lens 12A having the opening 8A may be prepared.

Next, the demo lens 12A and the lens 12
Are superposed in the direction of the main surface. In this case, the demo lens 12A is superposed on the upper surface of the lens 12.
At this time, the lens through hole 38 and the demo lens through hole 38A
In particular, as shown in FIG. 4, for example, the centers of the holes are arranged on the same straight line, so that they are communicated with each other [superposition step].

Further, after the superposing step, FIGS.
As shown in, from the upper side of the demo lens 12A to the demo lens through hole 38A and the lens through hole 38, respectively.
Positioning rods 68 and 70 are inserted. This allows
The position of the notch 36A of the demo lens 12A is the lens 1
It is defined on the upper surface of 2 and is accurately positioned [positioning step].

In this case, in particular, as shown in FIG. 5, for example, the notch portion 36A of the positioned demo lens 12A.
The lens 12 is exposed inside. Looking at the exposed exposed portion 72 in detail, the exposed portion 72 is the exposed portion of the lens 12 exposed inside the cutout portion 36A of the demo lens 12A.
Of the lens 12, the side end surface of the lens 12 (hereinafter, used as the same meaning as the peripheral end surface of the lens 12), and the lower surface of the lens 12 corresponding to the exposed upper surface of the lens 12.

After the positioning process, the demo lens 1
The exposed portion 72 exposed inside the notch portion 36A of 2A is
For example, the cutting is performed with an electric drill 80 [cutting process]. As the electric drill 80, a handy type that is easy to hold and work is used. That is, the exposed portion 72 is cut from the peripheral edge surface of the lens 12 by the electric drill 80 along the cutout portion 36A of the demo lens 12A. As a result, at a predetermined position on the peripheral edge surface of the lens 12,
The cutout portion 36 is formed.

In this case, first, the lens 12 of the exposed portion 72
The drill 80 is brought into contact with the peripheral edge of the [drill contact step]. Therefore, the initial positioning during cutting becomes more reliable. Next, the drill 80 uses the demo lens 12
It is displaced toward the notch direction of the notch portion 36A of A [displacement step]. Therefore, the notch portion 36A of the demo lens 12A serves as a guide groove, and the notch portion 36 of the lens 12 is cut more accurately. In the present embodiment, an electric drill, for example, is used as the cutting means for cutting the exposed portion 72, so that the cutting time can be shortened as compared with the cutting by hand machining such as a file.

In the above-mentioned drill contact step, the exposed portion 7
Of the two, the step of abutting the drill 80 obliquely on the peripheral edge surface of the lens 12 may be included. Then, after the step of abutting the drill 80 diagonally, the drill 80 and the lens 12
The one end in the axial direction of the drill 80 may be oscillated toward the notch direction of the notch portion 36A of the demo lens 12A with the contact portion with the peripheral edge face as the fulcrum. In this case, the rocking action of rocking the drill 80 with the contact portion as a fulcrum makes it possible to perform more stable cutting.

FIG. 8 is a perspective view showing another embodiment of the method for forming the notch portion of the spectacle lens according to the present invention.
In the embodiment of FIG. 8, in comparison with the above-described embodiments, particularly in the positioning step, one end sides of the positioning rods 68 and 70 in the axial direction are supported by a support base 74 having a rectangular plate shape, for example. That is, of the positioning rods 68 and 70, for example, one positioning rod 70 is the support base 7.
4 is inserted and fixed in the fixing hole 76 provided in 4. The other positioning rod 68 is only in contact with the upper surface of the support base 74. In this case, the demo lens 12A and the lens 12 that are superposed together with the other positioning rod 68 can be rotated around the one positioning rod 70 with the one positioning rod 70 as a fulcrum [rotating step].

In the embodiment shown in FIG. 8, since one end side of the positioning rod 70 in the axial direction is supported by the support base 74, the demo lens 12A and the lens 12 which are superposed on each other.
Can be stably supported. Further, since the demo lens 12A and the lens 12 can be rotated around the positioning rod 70 by the rotating step, the lens 12 can be arranged at a position where the notch 36 is easily cut.

In each of the above-described embodiments, the electric drill 80 as an example of the cutting means is provided with the notch 36 of the demo lens 12A.
Although it was displaced in the notch direction of A, in the cutting step, for example, the electric drill 80 is arranged at a position facing the notch part 36A of the demo lens 12A at a distance from the peripheral edge of the lens 12 of the exposed part 72. After that, the notch 36 may be shaved on the peripheral edge surface of the lens 12 by displacing the demo lens 12A and the lens 12 that are superposed on each other toward the electric drill 80 side. In this case, since the electric drill 80 side is arranged in a fixed state, the notch portion 36 can be cut more simply and accurately by displacing only the demo lens 12A and the lens 12 side that are overlapped.

[0037]

According to the present invention, it is possible to obtain a method for forming a notch portion of a spectacle lens, which can accurately and easily position the lens and can keep the quality constant.

[Brief description of drawings]

FIG. 1 is a front view solution diagram showing an example of eyeglasses to which a method for forming a notch portion of an eyeglass lens according to the present invention is applied.

FIG. 2 is an enlarged sectional view showing a main part of the spectacles shown in FIG. 1 when viewed from the plane side.

FIG. 3 is an exploded diagrammatic view of a main part of the glasses shown in FIGS. 1 and 2 when viewed from a plane side.

FIG. 4 is an exploded perspective view showing steps of an embodiment of a method for forming a notch portion of a spectacle lens according to the present invention.

FIG. 5 is a perspective view showing a state in which the step shown in FIG. 4 has been completed.

6 shows a state in which the steps shown in FIG. 4 have been completed,
It is a partially cutaway front view solution figure of FIG.

FIG. 7 is a perspective view diagram showing a step after the steps shown in FIGS. 4 to 6 are completed.

FIG. 8 is a perspective view showing another embodiment of the method for forming the notch portion of the spectacle lens according to the present invention.

[Explanation of symbols]

10 glasses 12 lenses 12A demo lens 14 Front 16 Satoshi 18 bridge 20 Lens stop 22 Lens set screw 24 Hinge part 26 Temple 26A Temple body 28 Semi-bending Satoshi 30 base 32 screw holes 34 nail pieces 36 Notch 36A Demo lens notch 38 lens through hole 38A Demo lens through hole 40 heads 42 core 44 Sliding part 46 Cover 48 Male thread 50 Sophia top 50a Sophisticated pieces 51a, 58 arcuate portion 52 Temple top 52a Temple piece 54 shaft hole 56 Temple collar 60 Axis 62 Temple side abutment end face (tip collar face of temple) 64 Face end face 68,70 Positioning rod 72 Exposed part 74 Support 76 fixing hole 80 electric drill 100 auction RL Reference straight line

Claims (7)

[Claims] 1. A step of preparing a lens having a predetermined lens shape, a step of forming a lens through hole at a predetermined position of the lens, and a notch portion formed at a desired position of a peripheral edge of the lens. In order to do so, a step of preparing a demo lens having substantially the same shape and size as the lens and having the same cutout portion as the cutout portion, when the lens and the demolens are superposed in a surface direction thereof, A step of forming a demo lens through hole in the demo lens, which can be communicated with the lens through hole, and a superposition step of superposing the lens and the demo lens in a plane direction thereof; and the lens through hole communicated by the superposition step. And a positioning step of inserting a positioning rod into the demo lens through hole and positioning the position of the cutout portion of the demo lens. Characterized in that it includes a cutting step of cutting the exposed portion of the lens exposed inside the cutout portion of the demo lens that has been cut along the cutout portion of the demolens from the peripheral end face of the lens, Method of forming notch. 2. The spectacles according to claim 1, further comprising a step of disposing a protective member on one main surface and / or the other main surface of the lens before the step of boring the lens. Method for forming notch in lens. 3. The cutting step includes a step of bringing the drill into contact with the peripheral edge of the lens in the exposed portion, and a step of notifying the drill with the notch of the demo lens after the step of contacting the drill. The method for forming a notch in a spectacle lens according to claim 1 or 2, further comprising a displacement step of displacing the notch in a notch direction of the portion. 4. The step of abutting the drill includes a step of abutting the drill diagonally with respect to a peripheral edge surface of the lens in the exposed portion, and the step of abutting the drill diagonally after the step of abutting the drill. And a step of swinging one end of the drill in the axial direction toward the notch of the notch of the demo lens with the contact portion between the peripheral edge surface of the lens and the fulcrum as a fulcrum. The method for forming a notch in a spectacle lens according to claim 1 or 2. 5. The positioning step includes a support base that supports one end side of the positioning rod in the axial direction, and one of the positioning rods is inserted into the lens through hole and the demo lens through hole. Fixed to the support base,
5. A rotating step of rotating the demo lens and the lens, which are superposed together with the other positioning rod, around the one positioning rod, with the one positioning rod as a fulcrum. The method for forming a notch in a spectacle lens according to item 1. 6. The method for forming a notch in a spectacle lens according to claim 1, wherein the drill is an electric drill. 7. In the cutting step, an electric drill is arranged at a position facing the cutout portion at a distance from a peripheral edge of the lens of the exposed portion, and then, the demo lens and the lens are overlapped with each other. 3. The method for forming a notch part of a spectacle lens according to claim 1, further comprising a cutting step of shaving a notch part on a peripheral edge surface of the lens by displacing the notch part toward the electric drill side. .