JP3054470U - Eyeglass lens processing template - Google Patents

Abstract

(57) [Summary] [Problem] An eyeglass lens processing capable of accurately processing an eyeglass lens with a small error, stably holding the lens processing machine, and giving an accurate scale to the holding part. To provide a template. SOLUTION: A substantially arc-shaped plate having a curve corresponding to the curvature of a lens to be processed is provided, and a positioning hole to be used as a reference of a pupil position is opened at the center of the plate. At least one detent hole is provided on the outer periphery of the positioning hole, and a holding part to be held by the lens processing machine by the positioning hole and the detent hole is formed to be thick and flat. A means of setting a scale was adopted. [Effect] High-precision lens processing and accurate measurement of optical conditions such as the distance between pupils can be performed.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention is an improvement of the template used when processing the spectacle lens according to the shape of the spectacle frame, and more specifically, the spectacle lens can be accurately processed with a small error, and is used in a lens processing machine. The present invention relates to a spectacle lens processing template capable of being stably held and capable of giving an accurate scale to the holding portion.

[0002]

[Prior art]

 When processing a spectacle lens by adapting it to the shape of the spectacle frame, it is necessary to accurately grasp the relationship between the two so that the optical center of the spectacle lens coincides with the center of the pupil of the spectacle wearer. For this purpose, a template with vertical and horizontal reference lines, scales, etc. attached to the surface is used. Then, the template is fitted to the spectacle frame to measure the relative positions of the two, then the template is removed and set on the fitting portion of the ball-sliding machine. The outer edge of the mirror lens is shaped with a grinding wheel.

However, since the conventional template is manufactured by cutting a flat plate material into a spectacle frame shape, it is compared with an actual spectacle lens having an uneven curve corresponding to correction of perspective, astigmatism, and the like. A deviation is inevitably generated in the contour shape and size of the template. For this reason, no matter how accurate the spectacle lens is shaped into a flat template using a balling machine, a processing error occurs, and as a result, when the processed lens is framed, There was a problem that the finishing process had to be performed again to make fine adjustments, and the shaping process of the eyeglass lens was inefficient and difficult.

[0006] Therefore, it is conceivable to bend a conventional flat template so as to have a curve having the same curvature as the actual spectacle lens to be processed. Since the deviation between the bent template and the spectacle lens to be processed is very small, if the spectacle lens is shaped with a ball-slider according to the template, the processing error of the spectacle lens can be minimized. Can be suppressed.

However, in the case of the curved template as described above, when shaping and processing the spectacle lens with a ball-slider, the fitting portion of the ball-slider is brought into contact with the curved surface of the template to form the template. Therefore, the holding state of the template becomes unstable, and it becomes difficult to shape and process the spectacle lens according to the template. In addition, since the vertical and horizontal reference lines and graduations cannot be accurately attached to the curved surface of the template as in the case of the conventional flat template, the relative distance between the optical center of the spectacle lens and the center of the pupil of the spectacle wearer can be reduced. There is also the problem that relationships cannot be accurately grasped.

[0006]

[Problems to be solved by the invention]

 The present invention has been made in view of the above-mentioned problems in the conventional spectacle lens processing template, and can precisely process the spectacle lens with a small error. It is an object of the present invention to provide a spectacle lens processing template that can stably hold the lens and that can provide an accurate scale on the holding part.

[0007]

[Means for Solving the Problems]

 The means adopted by the present inventors to solve the above technical problem will be described below with reference to the accompanying drawings.

That is, the present invention relates to a substantially arc-shaped plate having a curve corresponding to the curvature of a lens to be processed, and a center portion of the plate which is to be a reference position of a pupil position. A hole is formed, and at least one detent hole is formed outside the positioning hole. At the same time, the holding part held by the lens processing machine by the positioning hole and the detent hole is formed to be thick and flat. The feature is that the above-mentioned problem has been solved by adopting a means of forming a scale on the flat part of the holding part.

[0009]

[Embodiment of the invention]

 Hereinafter, the present invention will be described in more detail based on embodiments shown in the accompanying drawings. FIG. 1 is a rear view of the template according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line XX of the template of the first embodiment of FIG. 1, and FIG. FIG. 4 is a perspective view showing a state before the holding portion of the lens processing machine is set in the fitting portion of the lens processing machine. FIG. 4 is a perspective explanatory view showing a main part structure of the lens processing machine holding the template according to the first embodiment. FIG. 4 is a rear view of the template according to the second embodiment of the present invention.

First, a template according to a first embodiment of the present invention will be described with reference to FIGS. In the drawings, what is indicated by reference numeral 1 is a substantially arc-shaped plate having a curve corresponding to the curvature of the lens to be processed, and the front curve is formed in a convex shape. This substantially arc-shaped plate 1 is made by injection molding a transparent synthetic resin material. In the present embodiment, polymethyl methacrylate (PMMA) resin is used as the synthetic resin material. .

At the center of the plate 1, there are formed positioning holes 11 to be used as a reference for the pupil position of the spectacle wearer.・ 12 are established. As shown in FIGS. 2 and 3, the periphery of the center of the plate 1 including the positioning holes 11 and the detent holes 12 is a thick circular plate having a flat portion 13a formed on the back side. The holding unit 13 is provided. As a result, the flat portion 13a of the holding portion 13 abuts on the fitting portion of the lens processing machine described later, so that the plate 1 can be stably mounted on the lens processing machine. The plate 1 can be effectively prevented from flexing or cracking when the plate is mounted. In this embodiment, two detent holes 12 are provided. However, one or three or more detent holes 12 may be provided. A detent hole 12 is sufficient.

As shown in FIG. 1, a horizontal reference line 14 passing through the center of the positioning hole 11 is formed on the surface of the plate 1, and a vertical reference line 15 orthogonal to the horizontal reference line 14 is formed. ing. These reference lines 14 and 15 are used as a reference for the horizontal and vertical directions of the axialness when processing the astigmatism lens, and as a reference when various scales described later are provided. Further, on the flat portion 13a of the holding portion 13 of the plate body 1, vertical scales 16 are provided at regular intervals at right angles to a horizontal reference line 14, and the vertical scales 16 are provided between the pupils of the spectacle wearer. Used to measure distance (PD). Since the vertical scale 16 is formed not on the arc surface of the plate 1 but on the flat portion 13a, the vertical scale 16 is very accurate, and the distance between pupils can be measured accurately.

In FIG. 4, what is indicated by reference numeral 2 is a prescription lens to be processed. The one designated by the reference numeral 3 is a lens processing machine for shaping the lens 2 based on the outer contour of the plate 1, and in the present embodiment is a ball mill. The lens processing machine 3 includes a swing frame 32 provided on a processing machine body 31 so as to be able to swing back and forth (in the direction of the arrow in FIG. 4) about a swing fulcrum P, and one of the swing frames 32. A template fitting portion 33 provided at an end of the plate, a lock screw 34 for fixing the plate 1 to the fitting portion 33, and a portion provided at a position where the plate 1 locked to the fitting portion 33 is pressed against the plate. A guide plate 35 for swinging the swing frame 32 in accordance with the outer contour of the plate body 1 and a lens 2 provided at substantially the center of the swing frame 32 to sandwich the lens 2 to be processed. It basically has a vice mechanism (36, 37) that can be held and a grinder device 38 attached to the processing machine main body 31 so as to face the lens 2 sandwiched between the vice mechanisms. It is a well-known device in between.

In the above-described template for processing an eyeglass lens composed of the plate member 1 having a substantially circular arc shape, the plate member 1 has a curve corresponding to the curvature of the lens 2 to be processed. The deviation of the contour shape and size between the plate 1 and the lens 2 set in the lens processing machine 3 becomes very small, and as a result, the lens processing machine 3 shapes the lens 1 based on the plate 1. Processing errors of the lens 2 to be processed can be greatly reduced, and accurate lens processing becomes possible. Moreover, since the holding portion 13 of the plate 1 to be attached to the fitting portion 33 of the lens processing machine 3 is formed to be thick and flat, the plate 1 can be stably held by the lens processing machine 3 and the height is higher. Accurate lens processing becomes possible, and at the same time, an accurate vertical scale 16 or the like can be provided on the flat portion 13a of the holding portion 13, so that an accurate measurement of the pupil distance or the like can be performed.

Next, a template according to a second embodiment of the present invention will be described with reference to FIG. The second embodiment differs from the first embodiment in that various scales other than the vertical scale 16 are added. In the template of the second embodiment, a horizontal scale 17 and a diagonal scale 18 are provided on a flat portion 13a of the holding portion 13 of the substantially arc-shaped plate 1. The horizontal scale 17 is a scale provided at regular intervals at right angles to the vertical reference line 15, and is used to measure the height of the pupil line and the vertical position of the bifocal lens. The oblique graduations 18 are graduations provided at equal intervals in the centripetal direction along the circumference of the circular holding portion 13, and are used to measure the axiality when processing the astigmatic lens.

Since various scales 16, 17, and 18 can be accurately attached to the flat portion 13a of the holding portion 13 in this manner, it is possible to accurately measure optical conditions required when processing various lenses. Can be.

Although the embodiments of the present invention are generally as described above, the present invention is not limited to the above-described embodiments, and various changes may be made within the description of “claims for registering utility model”. For example, in the present embodiment, the holding portion 13 of the plate 1 is formed in a circular shape, but the holding portion 13 to be attached to the fitting portion 33 of the lens processing machine 3 is thick. If it is flat, the shape of the holding portion 13 can be changed as appropriate according to the shape of the contact surface of the fitting portion 33 and the type of the scales 16, 17 and 18. It is also possible to adopt a sunglass lens other than the prescription lens, and it is needless to say that any of these modified embodiments belongs to the technical scope of the present invention.

[0018]

[Effect of the invention]

 As described above with reference to the embodiment, the present invention employs a substantially arc-shaped plate having a curve corresponding to the curvature of the lens to be processed. The deviation of the contour shape and the size between the plate body to be processed and the processed lens is very small, and as a result, the processing error of the lens shaped by the lens processing machine based on the plate body is greatly reduced. Accurate lens processing can be performed with a reduction. In addition, since the holding portion of the plate to be mounted on the lens processing machine is formed to be thick and flat, the plate can be stably held on the lens processing machine, and more accurate lens processing can be performed. An accurate scale can be provided on the flat portion of the holding portion, and optical conditions such as the distance between pupils can be accurately measured. Therefore, such a large number of effects are achieved, and the practical value in the eyeglass field is extremely large.

[Brief description of the drawings]

FIG. 1 is a rear view of a template according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the template according to the first embodiment of FIG. 1 taken along line XX.

FIG. 3 is a perspective view showing a state before setting the holding portion of the template in the fitting portion of the lens processing machine according to the first embodiment;

FIG. 4 is an explanatory perspective view showing a main part structure of a lens processing machine holding a template according to the first embodiment;

FIG. 5 is a rear view of the template according to the second embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plate body 11 Positioning hole 12 Detent hole 13 Holding part 13a Flat part 14 Horizontal reference line 15 Vertical reference line 16 Vertical graduation 17 Horizontal graduation 18 Slant graduation 2 Lens 3 Lens machine 31 Machine body 32 Swing frame 33 Fitting Part 34 Lock screw 35 Guide plate 36 Vice mechanism 37 Vice mechanism 38 Grinder device P Swing fulcrum

Claims (3)

[Utility model registration claims] 1. A substantially arc-shaped plate having a curve corresponding to the curvature of a lens to be processed, and a positioning hole to be used as a reference for a pupil position is opened in the center of the plate. At least one detent hole is formed in the outer periphery of the positioning hole, and a holding part to be held by the lens processing machine by the positioning hole and the detent hole is formed to be thick and flat. A template for processing eyeglass lenses, characterized in that the part is graduated. 2. The plate according to claim 1, wherein a horizontal reference line and a vertical reference line passing through the center of the positioning hole are formed on the plate body surface.
A template for processing eyeglass lenses. 3. The spectacle lens processing template according to claim 1, wherein at least one of a vertical scale, a horizontal scale, and a diagonal scale is provided on the flat portion of the holding portion.