JP2003295130A - Method of assembling and adjusting spectacle frame and lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adjust another lens with a lens specified by optopmetry or a spectacle frame selected by a customer as a reference, then assemble the both. <P>SOLUTION: In accordance with the data inputted to a computer from a retail store relating to the lens 1 specified by optopmetry or the spectacle frame 5 selected by the customer, an agency imparts the required curve to an eyewire section 6 of the spectacle frame 5 by selected molds, and thereafter assembles both thereof. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling and adjusting an eyeglass frame and a lens.

[0002]

2. Description of the Related Art In order to integrate a new lens specified by optometry and a spectacle frame selected by a customer, hold a finger or the like so that the rim portion of the spectacle frame made separately from the lens is aligned with the curvature of the lens. After partially bending, the groove is fitted with the bevel that was cut on the peripheral edge of the lens.

It has been said that the bending correction should be made so that the lens and the rim portion fit together, but in recent years, the lens is molded from plastic, and the material itself has a high refractive index so that it can be formed thinly. When it comes to, the curvature in the thickness direction between the rim and the rim, that is, the difference in the curvature in the thickness direction, causes the outer periphery of the lens to bend, distorting the visible image, or having a high function like a multifocal lens. In the case of a lens with a mark, it is not possible to maximize its characteristics, and the curvature of the spectacle frame in which a remarkably large dummy lens with a curvature of 5 degrees in the thickness direction is fitted is used. When fitting a small lens, the mold must be prevented from collapsing by giving the required curvature to the entire rim or by bending it. The problem is that the selected eyeglass frame is extremely small, as seen in women's eyeglasses, and it is a multifocal lens depending on the progressive zone length, that is, the distance between the near and far points. There is a problem that it becomes impossible to incorporate.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to:
A new assembly adjustment method that allows one to be used as a reference while correcting the other without compromising the optical characteristics of the lens and the design shape of the spectacle frame. To provide.

Another object of the present invention is to:
It is an object of the present invention to provide a new method of assembling and adjusting a spectacle frame and a lens that allows the optical characteristics of the lens to be optimally matched to the user's feeling of use.

Still another object is to provide a new spectacle frame / lens assembling / adjusting method which can meet the demands of customers as much as possible and which can be easily customized.

[0007]

That is, the present invention provides, as a method of assembling and adjusting a spectacle frame and a lens for achieving such a subject, data concerning a lens specified by an optometry and a spectacle frame selected by a customer. In order to input from a retail store to a computer of a supplier, and to assemble these spectacle frames and lenses integrally, one of them is used as a standard and the other is adjusted based on the calculation contents of the computer.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

First, the visual acuity of the customer, for example, the degree of myopia, hyperopia or presbyopia, is examined by an optometry, and the original body of the lens obtained by this is selected from the stock, and the rim portion is based on the eye point M of the customer. It is cut according to the shape of 6, and as shown in FIG. 3, a bevel 3 based on the thickness of the lens 1 is formed on the periphery thereof.

For example, in a lens for myopia, as shown in FIG. 1, the base curve 1a of the lens 1, that is, the lens 1
A spherical surface having a small curvature corresponding to "degree" is formed on the outer surface thereof, and a concave surface whose curvature increases in proportion to "degree" is formed on the inner surface 1b of the outer surface 1a. The incident light is focused at a distance of 1 m from the surface 1a at 1 degree, and at a distance of 1/2 m at 2 degrees, and at a distance of 1/3, m, or 1/4 m below. Since it is decided that the focus is 3 degrees and 4 degrees, the "degree" is decided by the optometry, and when the customer's favorite spectacle frame is selected and the part number is decided, the lens is placed around the lens. The bevel 3 based on the thickness of 1 is cut, and the curvature of the bevel curve, that is, the curvature of the bevel 3 in the thickness direction is input to the computer together with “degree”.

In this way, when various data regarding the lens 1 and data regarding the product number of the spectacle frame 5 are input to the computer, the rim portion 6 of the spectacle frame 5 is a lens to be assembled based on the calculation contents of the computer. A curvature matched to the curve 1 is imparted by the molding dies 11 and 12.

FIG. 2 shows that the lens 1 is attached to the rim portion 6 of the elastic eyeglass frame 5 formed of titanium or a resin material by using the forming dies 11 and 12 selected so as to be compatible with the contents of calculation of the computer. This is for imparting a curvature that matches the curvature in the thickness direction, and in this embodiment, four sets of molding dies having a curvature larger than that according to the curvature in the thickness direction of each bevel curve for each group are provided. Used.

Next, based on FIG. 6, an adjusting method by the "lens reference mode" in which the lens 1 is used as a standard and the curvature of the rim portion 6 is corrected and the lens 1 is assembled to the spectacle frame 5 will be described.

Now, when a customer who needs spectacles determines the optimum "degree" by optometry and at the same time selects his or her favorite spectacle frame 5 (step a), the retail store stores these data.
Inform the supplier, that is, the distributor or the designated factory that supplies the desired eyeglass frames and lenses to the retail store,
The operator of the supplier inputs these sent data to the computer (stepro).

Based on these data, the operator selects the corresponding lens original body to which "degrees" are added from the stock, and as shown in FIG. 4, the customer selects the central portion of the original body. The required lens 1 is cut so as to match the eye point of (1) and the shape of the rim portion 6 of the spectacle frame 5 (step C), and then according to the contents calculated by the computer (step D), the peripheral edge thereof. Remove bevel 3 (step E).

On the other hand, the operator takes out the spectacle frame 5 selected by the customer from the frame stock, and at the same time, the spectacle frame 5 such as the material and thickness of the rim portion 6 and various types of the lens 1 such as the bevel curve and the eye point. Input the data of to the computer (step F).

Then, when the corresponding mold is selected by the computer and displayed on the display (step), as shown in FIG. 2 (b), the operator turns the mold 11, 12 into a hand press. Put on the lens 1
The rim portion 6 is curved (step) according to the curvature of the bevel 3 provided on the peripheral portion of the lens 1, and finally the cut lens 1
Is fitted into the rim portion 6 of the spectacle frame 5 and these are combined and integrated without impairing the optical characteristics thereof (step).

By the way, the process of assembling the lens 1 to the rim portion 6 of the titanium frame 5 having a standard thickness has been described above. However, the titanium frame 5 having a thickness larger than this and a rigidity different from this are used. Resin frame 5
In order to fit the lens 1 into the lens 1, it is sufficient to arrange the dedicated molding dies 11 and 12 for imparting a required curvature to the respective rim portions 6 by the number of groups.

On the other hand, the spectacle frame 5 having a large curvature, for example, the spectacle frame 5 in which a dummy lens having a large curvature such as a curvature of 5 degrees in the thickness direction is fitted, is 1 to 3 degrees.
When the lens 1 having a standard curvature such as degrees is fitted,
This spectacle frame 5 will be largely deformed from the originally designed mold.

FIG. 7 shows an embodiment of a "frame reference mode" applied in such a case, that is, an adjusting method for adjusting the lens 1 with the spectacle frame 5 as a reference and assembling the lens 1 to the spectacle frame 5. It is shown.

Now, when the data regarding the "degree" of the lens 1 specified by the optometry and the product number of the spectacle frame 5 selected by the customer is sent from the retail store to the agency (step
b), the operator cuts the lens 1 according to the shape of the rim portion 6 of the spectacle frame 5 and at the same time (step
c) Based on data such as the thickness of the peripheral portion of the lens 1 and the curvature of the spectacle frame 5 in the thickness direction, the computer performs a three-dimensional calculation (step d) and inputs the calculation content to the bevel shaving machine. Then (step e), on the periphery of the lens 1,
The bevel 3 corresponding to the degree of curvature of the rim portion 6 is ground within the range allowed by the thickness thereof (step f), and the curvature of the ground bevel 3 in the thickness direction corresponds to the degree of curvature of the rim portion 6. When they match, the lens 1 is assembled to the spectacle frame 5 as it is (step i), and when they do not match (step f), the spectacle frame 5 is supplementarily corrected by using the molding dies 11 and 12. (Step g), the lens 1 is assembled to the spectacle frame 5 to be integrated (step
i).

On the other hand, in the case of the spectacle frame 5 which looks good when the base curve 1a of the lens 1 is assembled so as to be substantially flush with the rim portion 6, as shown in FIG. Based on the data of the spectacle frame 5, the bevel 3 is mounted on the base curve 1a side of the lens 1 by the bevel shaving machine.

Further, as shown in FIG. 5, when a female customer or the like desires to attach the multifocal lens 1a to an oval spectacle frame 5a having a small frame,
The agent who inputs the data of the lens 1 and the spectacle frame 5 determines the distance from the bottom to the lower edge of the eyepoint M of the spectacle frame 5 and the progressive zone length of the multifocal lens 1, that is, the distance point P1 and the near vision point. When it is determined whether or not the assembly is possible based on the distance L from the point P2, and it is determined that the normal multifocal lens 1 having a progressive zone length in the range of 12 mm to 18 mm cannot be installed. To send this data to the lens factory and instruct the new multifocal lens 1 to be approximately manufactured.

[0024]

As described above, according to the present invention, based on the data of the lens and the spectacle frame sent from the retail store, the supplier can select one of the lens and the spectacle frame based on the calculation content of the computer. Since the other is corrected based on the standard as described above, it is possible to assemble the both without deteriorating the characteristics of the lens and the shape of the spectacle frame. Can manufacture a lens that suits the customer's preference in a semi-customized manner and attach it to a desired spectacle frame.

[Brief description of drawings]

FIG. 1 is a curvature in the thickness direction of a myopic lens and its “degree”.
It is the figure shown about.

FIG. 2 is a view showing an eyeglass frame and a molding die for imparting a curvature to a rim portion thereof.

FIG. 3 is a diagram showing a bevel formed on a peripheral edge of a lens so as to correspond to a curvature of a rim portion of an eyeglass frame.

FIG. 4 is a diagram showing a bevel formed on a base curve side of a lens so as to correspond to a curvature of a rim portion of an eyeglass frame.

FIG. 5 is a diagram showing a progressive zone length of a spectacle frame and a lens.

FIG. 6 is a diagram showing a “lens reference mode” in which a rim portion is corrected with a lens as a reference.

FIG. 7 is a diagram showing a “frame reference mode” in which a bevel is cut in a thickness direction of a lens according to a curvature of a rim portion.

[Explanation of symbols]

1 lens 3 bevel 5 eyeglass frames 6 rim part 11,12 Mold

Claims (4)

[Claims] 1. A computer for inputting data regarding a lens specified by an optometry and a spectacle frame selected by a customer to a computer of a supplier from a retail store, and for assembling the spectacle frame and the lens integrally. A method of assembling and adjusting an eyeglass frame and a lens, characterized in that one is used as a standard and the other is adjusted based on the contents of the calculation. 2. From a plurality of molding dies having a curvature larger than an elastic limit of a rim portion of the spectacle frame so as to correspond to a curvature in a thickness direction of the lens with reference to data input with respect to the lens. Choose one,
The spectacle frame according to claim 1, wherein the molding die imparts a curvature corresponding to a curvature in a thickness direction of the lens based on a three-dimensionally calculated content by the computer. And how to adjust the lens assembly. 3. A bevel corresponding to a curvature in a thickness direction of a rim portion of the spectacle frame is formed on a peripheral portion of the lens based on data input with respect to the spectacle frame, based on a calculation content of the computer. The method for assembling and adjusting an eyeglass frame and a lens according to claim 1, wherein the adjustment is performed. 4. When the progressive zone length of the multifocal lens to be assembled does not match the vertical dimension of the rim portion of the spectacle frame with reference to the data input with respect to the spectacle frame, the calculation content of the computer The method of assembling and adjusting the spectacle frame and the lens according to claim 1, wherein the progressive band length of the lens is shaped so as to match the vertical dimension of the rim portion.