JPH03136763A - Lens grinder - Google Patents

Abstract

PURPOSE:To easily measure the geometric center distance of a pair of lens frames as lens grinding data by providing a screen on which a scale for measuring the geometric center distance of a pair of lens frames provided on the frame of glasses is displayed in a main body of lens grinder. CONSTITUTION:A frame 9 of glasses is mounted on a scale displayed on a screen 6. Then, the inner reference position of one lens frame 9b of the frame 9 of glasses is set to the reference position of the scale so that the geometric center distance of a pair of lens frames 9a and 9b provided on the frame 9 of glasses is measured.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an abrasion machine that can directly obtain eyeglass frame data for lens processing.

(Prior Art) A beading machine is generally used as a device for processing lenses to be fitted into eyeglass frames.

When processing lenses with this aperture machine, the distance between the geometric centers of a pair of left and right lens frames (hereinafter referred to as frame PD or FP) is
(abbreviated as D) and other data such as the lens frame shape.

An example of a device capable of measuring 20FPD is a device for measuring balls of eyeglass frames, such as that disclosed in Japanese Patent Application Laid-Open No. 169009/1983. In this measuring device, the eyeglass frame is held by a holding mechanism made up of many parts, the holding mechanism rotates the eyeglass frame, the rotation angle is detected by a rotary encoder, and the eyeglass frame swings along with this rotation. Meanwhile, a filler that is movable along the inner surface of the lens frame is provided, and the movement of this filler is detected three-dimensionally by three rotary encoders, and the FPD is obtained from the detected data.

(Problem to be Solved by the Invention) By the way, with the above-mentioned eyeglass frame measuring device, the frame PD cannot be obtained unless both lens frames of the eyeglass frame are measured. This required measurement work and was time-consuming.

■When one lens of glasses is damaged and only the lens frame shape and frame PD need to be measured when replacing the lens.

■When replacing one lens of glasses when it is damaged, the lens frame shape is provided as data, but only the frame PD needs to be measured.

Moreover, the above-mentioned eyeglass frame measuring device has a problem that the structure is complicated and expensive.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a grinding machine that can easily measure only the frame PD as lens grinding data with an inexpensive and simple structure.

(Means for Solving the Problems) In order to achieve this object, the present invention provides a screen that displays a scale for measuring the distance between the geometric centers of a pair of lens frames provided in an eyeglass frame. It is characterized by a beading machine installed in the main body.

(Function) According to this configuration, the eyeglass frame is placed on the scale displayed on the screen, the reference inner position of one lens frame of the eyeglass frame is aligned with the reference position of the scale, and the FPD of the eyeglass frame is adjusted. Measure.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

[First Embodiment] FIGS. 1 to 3 show a first embodiment of a beading machine according to the present invention.

In Fig. 1, 1 is the main body of the machine, 2 is a carriage mounted on the machine main body 1 so as to be movable left and right and swingable up and down, and 3.3 is mounted on the carriage 2 so as to be rotatable. A lens holding shaft 4 is a lens to be processed which is held between the lens holding shafts 3 and 3.

An inclined surface 5 is formed in the front part of the beading machine body 1, a liquid crystal display section 6 is provided as a screen on the left side from the center of the inclined surface 5, and a portion near the right end of the inclined surface 5 is provided. is provided with a keyboard 7. Further, a reference wall 8 having a reference contact surface 8 a is formed along the liquid crystal display section 6 at the lower edge of the inclined surface 5 .

The liquid crystal display section 6 shows the distance between the geometric centers of the pair of lens frames 9m and 9b provided on the eyeglass frame 9 (FPD
In other words, a scale lO for measuring frame PD) is displayed. As shown in FIG. 2, this scale 10 has a reference line Ion extending perpendicularly to the reference contact surface 7a, and a moving measuring line 1 parallel to this reference line 10a.
0b (cursor), and a scale 10c arranged in a direction perpendicular to the reference line 10a for reading the distance of the moving measuring line iob from the reference line lot.

Further, on the right side of the liquid crystal display section 6, an FPD display section 11. which displays data on the geometric center-to-center distance (frame FD) of both lens frames of the eyeglass frame. A PD display section 12 that displays the interpupillary distance (PD) of the patient according to the prescription, and an UP display section 13 that displays the amount of increase of the lens optical axis with respect to the geometric center of the lens frame. A data display section such as a 5IZE display section 14 for displaying the finished dimensions of the lens processing is provided.

And on the keyboard 7, there is a button 15 for increasing data.
, a data reduction button 16, a button 15, a button 16, and an FPD button 17 for instructing FPD measurement.

FIG. 6 is a block diagram showing the circuit configuration of the FPDilf determining device according to the present invention. The command from the FPD button 17 is configured to be input to the second input terminal 21b of the AND circuit 21, the second input terminal 22b of the AND circuit 22, and the image forming circuit 28, respectively. Here FPD
The button 17 is a self-holding switch, and has the function of self-holding an operation command until a command from a switch button that commands another function (not shown) is input to the ball-sliding machine.

The AND circuit 21 is configured such that a command from the data increase button 15 is input to the first input terminal 21a, and a pulse from the pulse generator 23 is input to the third input terminal 21c. The command from the data reduction button 16 is input to the first input terminal 22a of the AND circuit 22, and the command from the data reduction button 16 is input to the third input terminal 22c.
is configured such that pulses from a pulse generator 23 are inputted thereto.

The output of the AND circuit 21 is input to the address addition circuit 24,
The output of the AND circuit 22 is configured to be input to an address subtraction circuit 26.

The reference address memory 25 stores a reference address X on the X axis, which is the initial display position of the cursor fob in the address coordinate system x-y of the pixels of the liquid crystal display section 6, as shown in FIG. is stored, and the reference address xe is input to the address addition circuit 24 and address subtraction circuit 26.

The outputs of the address addition circuit 24 and address subtraction circuit 26 are input to an image forming circuit 28. The image forming circuit 28 includes fixed pixel address information and a cursor 10 of the liquid crystal display section 6 for configuring a reference line 10a and a scale 10c, which are fixed images.
A fixed image information memory 27 is connected to store predetermined Y-axis information YA to Y for setting b to a predetermined length. The image forming circuit 28 is in charge of displaying images on the liquid crystal display section 6 and displaying numerical values on the FPD display section.

Next, a case will be described in which the frame PD is measured using the abrasive machine having such a configuration.

In this measurement, first, the eyeglass frame 9 is placed on the liquid crystal display section 6, and the lens frames 9a, 9 of the eyeglass frame 9 are placed on the liquid crystal display section 6.
The outside of b is brought into contact with the reference contact surface 8a of the reference wall 8 as shown in FIGS. 1 and 3, and the point A on the inner side of the lens frame 9a closest to the bridge 9c is aligned with the reference line 10a.

When you press the FPD button 17 to command FPD measurement, the command is self-held and the AND circuit 21 and AND circuit 22
and 9 image forming circuits 2 inputted to the image forming circuit 2B.
8 receives this measurement command and inputs the fixed pixel address information from the fixed image information memory 27, the Y-axis information YA to Y8 of the cursor 10b, and the output of the address addition circuit 24 or the AND circuit 22.

Since no commands have been issued from the data increase button 15 or the data decrease button 16, the reference address XII of the reference address memory 25 is input directly to the image forming circuit 28 via the address addition circuit 24 or the address subtraction circuit 26. Therefore, the image forming circuit 28 displays the fixed image of the reference line 10a and the scale 10c on the liquid crystal display so that the cursor 10b is located at the reference position (the position of the scale 70 mm), as shown by the broken line in FIG. Display the image on 6. Further, the reference FPD value is numerically displayed on the FPD display section.

As shown in FIG. 3, when the cursor lOb is located inside the lens frame 9b, the data increase button 15 is operated. Only while the button 15 is pressed, the command from the button 15 is input to the AND circuit 21, and the pulse generator 2
The 0-address addition circuit 24, in which the pulse from 3 is input to the address addition circuit 24, adds the address x1 corresponding to the input pulse to xe from the reference memory 25, and after the addition (X a
+Xe) address is output to the image forming circuit 2B. As a result, the image forming circuit 28 moves the cursor tab to a new (X
e+xi) Move and display the address.

This operation causes the cursor fob to match the point B inside the lens frame 9b, which is farthest from the bridge 9C, as shown by the solid line in FIG. As a result, the image forming circuit 28 prints the frame FD corresponding to the new address (X a+ xi).
Display the value numerically on the FPD display. Also, this FPD
can also be obtained by reading the position of the cursor 10b on the scale 10c.

Contrary to the above, when the cursor 10b is located outside the lens frame 9b, the data reduction button 16 is operated.

Only while the button 16 is being operated, the command from the button 16 is input to the AND circuit 22, and the pulse from the pulse generator 23 is input to the address subtraction circuit 26. The address number X corresponding to the input pulse is subtracted from the reference address X6 of , and the subtracted address (X e - XJ) is output to the image forming circuit 28 . As a result, the image forming circuit 28 moves and displays the cursor 10b to a new address (X5-XJ).

This operation causes the cursor 10b to
coincides with point B inside the lens frame 9b. This results in
The image forming circuit 28 numerically displays the frame PD value corresponding to the new address (X@xJ) on the FPD display section.

In addition, the second FPD has the position of the cursor 10b on the scale 10c.
It can also be obtained by reading.

The data of the frame PD obtained on the display section 12 is directly input to an arithmetic and control circuit (not shown) together with other data displayed on the display sections 12 to 14, and is processed into processing data for the lens to be processed. . However, this arithmetic control circuit drives and controls the carriage 2 based on the processed processing data to process the lens 4 to be processed into a lens frame shape.

[Second Embodiment] FIGS. 4 and 5 show a second embodiment of the present invention.

This embodiment shows an example in which a reference positioning pin 18 is provided in place of the reference line 10a in the first embodiment. This reference positioning pin 18 is projected and held in a slit 19 provided at the left end of the inclined surface 5 so as to be freely movable in the longitudinal direction. Note that the slit 19 extends perpendicularly to the reference contact surface 8a.

In this embodiment, the eyeglass frame 9 is placed on the liquid crystal display section 6, and the outer sides of the lens frames 9a, 9b of the eyeglass frame 9 are brought into contact with the reference contact surface 8a of the reference wall 8 as shown in FIG. At the same time, the reference positioning pin 18 is positioned within the lens frame 9a, and the eyeglass frame 9 is moved to the right in FIG. As a result, the reference positioning pin 18 moves longitudinally along the slit 19 while slidingly contacting the inner surface of the lens frame 9a, and finally reaches a point C inside the lens frame 9a that is farthest from the bridge 9c side. come into contact with Therefore, by performing the same button operation as in the first embodiment at this position, the lens frame 9b
By aligning the moving measurement line 10b with the dot on the bridge 9c side, the frame PD of the eyeglass frame 8 can be directly obtained on the FPD display section 11. In this case, the position of the moving measurement line 10b can also be directly read from the scale 10c.

(Effects of the Invention) As explained above, the present invention has a configuration in which the main body of the beading machine is provided with a screen on which a scale for measuring the distance between the geometric centers of a pair of lens frames provided on an eyeglass frame is displayed. Therefore, only the frame FD can be easily measured as lens grinding data with an inexpensive and simple structure.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing a first embodiment of a beading machine according to the present invention. 2 and 3 are explanatory diagrams for explaining the use of the liquid crystal display section of the beading machine shown in FIG. 1. FIG. 4 is a schematic perspective view showing a second embodiment of the ball-sliding machine according to the present invention. FIG. 5 is an explanatory diagram of the use of the liquid crystal display section of the beading machine shown in FIG. 4. FIG. 6 is a block diagram showing the circuit configuration of the first embodiment. FIG. 7 is a schematic diagram showing the relationship between display images and pixel addresses of the image display section. 1...Damezuri machine body 6...Liquid crystal display section (screen) 9...Eyeglass frame 9g, 9b...Lens frame lO...Scale Figure 1 Figure 2 10 Figure 3 n Figure 5n Figure 4 Figure 7

Claims (1)

[Claims] A beading machine characterized in that the main body of the beading machine is provided with a screen on which a scale for measuring the distance between the geometric centers of a pair of lens frames provided on an eyeglass frame is displayed.