JPH03261814A - Measuring apparatus for shape of spectacle frame - Google Patents

Abstract

PURPOSE:To calculate the width of a nose of a spectacle frame by relatively moving a detecting part and a measuring means towards a pair of rims, and continuously measuring the two rims. CONSTITUTION:A spectacle frame 230 is mounted on fixed pins 122, 123, 142, 143 so that an axis of the frame is in the direction X. Movable pins 120, 121 are made to abut against an upper rim, and pins 140, 141 are pressed in contact with a lower rim, thereby fixing the frame 230. When the measurement is started, a disc-shaped contacting element 200 is placed at a predetermined posi tion within a frame of the frame 230 on an extension line of the fixed pin 143. Then, a moving plate 212 is moved in the direction X, so that the height is agreed to the height of a rim groove from the height information of the contacting element 200 obtained from a linear scale 203 and an encoder main body 204. As the contacting element 200 is measured while being made to abut on the inside of the rim groove, three-dimensional data of the lens is stored in a lens shape memory. In this manner, the shape of the right and left rims is continuously and automatically measured in the directions X and Y, and the moving distance of the contacting element 200 is measured. Accordingly, the width of the nose of the frame 230 can be obtained through calculations.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for measuring the shape of a lens frame of an eyeglass frame.

[Conventional technology]

A V-shaped groove for fitting a lens is formed in the rim of the eyeglass frame. Conventionally, the shape of the grooves on either the left or right side of this type of eyeglass frame (this is called the upper mold) was measured and applied to the other rim, or the shape of the grooves on one rim was measured and then the shape of the groove on the other rim was measured. The groove shape was manually set and measured again according to the procedure previously used.

[Problem to be solved by the invention]

In the conventional technology as described above, the frame shape can only be measured for each frame of one [1ffIrf], and although it is possible to measure the frame shape of each left and right frame by that measurement, it is not possible to measure the frame nose width. When creating eyeglass prescription data manually, the frame PD must be measured by hand or the nominal value displayed on the frame must be entered manually, which is complicated and has problems with accuracy. .

When measuring the frame frame shape, you can freely set the frame vertically and horizontally, but
Regarding the frame reference axis, if you do not set the frame reference axis and the measurement system reference axis so that they are exactly the same, an error will occur in the astigmatic axis prescription, so it may take time to match the axes, or it may be difficult to match them accurately. I couldn't.

The purpose of the present invention is to have a degree of freedom in matching the frame reference axis and the measurement system reference axis when setting eyeglass frames, and to continuously set the left and right lens shapes of the II mirror frame in a single setting. An object of the present invention is to provide a shape measuring device for eyeglass frames that can perform measurements.

[Means to solve problems]

For the above purpose, the present invention includes a holding means for holding an eyeglass frame, a detection section for a lens fixing groove that is inserted into and removed from a rim of the eyeglass frame, and a lens shape of the rim into which the detection section is inserted. a measuring means for measuring, a moving means for relatively moving the detecting section and the measuring means in the direction of the pair of rims, and calculating the shape of the eyeglass frame from the data of the measuring means and the amount of movement of the moving means. The means to solve the problem is to have the means.

[Effect]

In the present invention, the detection section and the measuring means are configured to move relative to each other in the direction of a pair of rims to continuously measure the two rims, and the method is suitable for prescription of the amount of shift used when processing lenses. It is possible to measure the value of the nose width of the frame, which is the necessary information, and it is possible to measure the nose width of the frame by other means, as in the past, or to use the nominal value displayed on the frame and enter it newly when inputting prescription data, or to check the accuracy. The inconveniences affecting the will be resolved.

In addition, since it is configured to perform arithmetic processing using the data obtained from the above continuous measurements, even when prescribing astigmatism, where the reference axis of the frame and the reference axis of the measurement system must reliably match when centering the frame, It is simple to install and can be easily accommodated.

〔Example〕

Next, the embodiment of the present invention shown in the figures will be described in detail.

FIG. 1 is a partially cutaway perspective view of an embodiment of the present invention;
FIG. 2 shows a plan view thereof, FIG. 3 is a detailed view illustrating the measuring section, and FIG. 4 is a sectional view taken along the line A-A' in FIG. 1.
FIG. 5 is a sectional view taken along the arrow BB in FIG. 1, and FIG. 8 is a block diagram showing the calculation and control circuits.

The following description will be made based on FIGS. 1, 2, 3, 4, 5, and 8.

A guide rod 103 parallel to the vertical direction (Y direction) is supported by shaft support plates (105, 106, 107, 108) fixed at each angle on the substantially square base 100.
．． 104 are arranged.

A moving stage IOL 102 is slidably fitted into this guide barrel. Fixed side pins 122 and 123 are implanted in the movable stage 101, and further support temporary pins 127.1
2B is fixedly installed. A support rod 126 is rotatably supported by the temporary support 127.12B, and pin fixing members 124.125 are fixed to the support rod 126. Furthermore, a gear 131 is similarly fixed to the support rod 126. The gear 131 meshes with a pinion 130 fixed to the shaft of a pin opening/closing motor 129 fixed to the moving stage 101.

Note that the movable pin 12 is attached to the pin fixing members 124 and 125.
0.121 is fixed.

Next, on the moving stage 102, fixed side pins 142.
143 is implanted, and furthermore, a cylindrical member 146, an encoder main body 150, and a pin vertical motor 148 are fixedly installed. A shaft 145 implanted in the pin upper and lower members 144 is slidably fitted into the cylindrical member 146 .

Further, the pin up/down member 144 includes a vertical movement pin 140.1.
41 and the linear scale 149 are fixed, and the tension spring 15 has one end fixed to the moving stage 102.
The other end of 1 is hung.

A cam 147 is fixed to the shaft of the pin vertical motor 14B.

Next, guides are supported by lower shaft supports (108, 109, 110, 111) fixed at each corner of the back surface of the base 100, and are arranged parallel to the lateral direction (X direction of the measurement coordinate system). Bars 165,166 are arranged. This guide rod moves the lateral movement base 260 to the lateral movement base 1604.
This fixed horizontal shaft support member (167, 168, 169,
17o). A lateral movement motor 164 is fixed on the lateral movement base 160, a pinion 163 is fixed to its shaft, and meshes with a rank 112 fixed to the back side of the heath 100 in the lateral direction.

Further, a table rotation motor 162 is fixed to the lateral movement base 160, and a gear 161 is fixed to the shaft thereof.

The gear 161 meshes with a gear formed on the outer periphery of a disc table 180, and the disc table 180 has stepped rings 196 rotatably provided at three locations on the disc table 180, as shown in FIG. .19'7.198, it is rotatably engaged with the lateral movement stage 160 using a hole formed in the lateral movement stage 160 as a guide surface.

Further, on the disc table 180, one side is placed on the table 18.
A guide member 190 is slidably fitted into a guide rod 1B2 supported by guide support plates 183 and 184 fixed at 0, and the other side is also fixed to the table 180.
A moving member 181 is disposed that is driven by a ring 191 that rolls in a groove.

A rack 185 is fixed to the end surface of the moving member 1131 in parallel with the guide rod 182, and meshes with a gear 186 fixed to the shaft of an encoder 188 fixed to the lower surface of the disc table 18 (). ing.

Further, one end of a tension spring 189 is applied to one end of the moving member 181 in parallel with the guide rod 182.
The other end of 89 is hung on a disc table 180.

Furthermore, the moving member 181 is provided with a guide portion in a direction orthogonal to the guide rod 182, and the vertical shaft 202 is fitted to be slidable in the Z direction.

A green plate 201 is fixed to the upper end of the vertical shaft 202 to which a disc-shaped contact 200 for contacting the rim groove of the frame is fixed.

Further, a plate-like member 205 is fixed to the lower end of the vertical shaft 202, and as shown in FIGS. 4 and 5, the plate-like member 205
A shaft 226 is installed at one end, a rotatable ring 209 is attached to the shaft, and the ring 209 fits into the groove of the rotation stopper plate 207 fixed to the lower part of the moving member 181, and the vertical shaft 2
02 is prevented from rotating. Note that one end of the tension spring 208 is hung near the tip of the shaft 226, and the other end is hung around the moving member 181.

Furthermore, a linear scale 2 is provided on one side of the plate member 205.
03 is fixed, and an encoder main body 204 is fixed to the lower part of the moving member 181.

Note that a shaft 227 is implanted on the lower surface of the plate member 205, and a rotatable ring 206 is attached to the shaft.

A support plate 225 having an L-shaped cross section is fixed to the lower surface of the lateral 1s moving base 160, and guide shafts 219 and 225 disposed in parallel to the guide shafts 103 and 104 are fixed to the upper surface of the support plate 225. A movable plate 212 that is slidable in the axial direction is fitted to the guide shafts 219 and 220.

A rank 21G is fixed to the end surface of the movable plate 212 in parallel with the guide shafts 219 and 220, and a pinion 217 attached to the motor 218 is fixed to the lower surface of the support plate 225.
It's in sync with.

Furthermore, a motor 21 is provided on the bottom surface of the movement +Fj, 212.
1 is fixedly installed on the motor shaft, and a screw 210 is fixedly installed on the motor shaft with a lateral force (2), and is in contact with a ring 206.

The operation of the frame shape measuring device configured as described above will be explained below.

First, as shown in FIG. 4, the motor 129 is simultaneously rotated to open the movable pin 121 in the direction of arrow a in order to clamp the frame. The opening amount of the movable pin 121 is controlled by starting the key manual means 608 and 607 and using the calculation program 6.
03, central processing unit 602 processes, l/○ boat 60
4 by the motor drive circuit 605.

Note that the movable side pin 120 is interlocked with the movable side pin 121 and opened at the same time.

The pin upper and lower member 144 is urged downward by a spring 151, and the cam 14 fixed to the shaft of the motor 148
7 comes into contact with the pin up and down member 144 by the rotation of the motor 148, and moves the pin up and down member 144 in the direction of arrow C in the figure against the biasing force of the spring 151. Naturally, the movable pins 140 and 141 fixed to the pin upper and lower members 144 are interlocked.

Note that the rotation amount of the cam 147 is controlled by the key manual means 608, 607 as described above.

Next, attach the glasses frame 230 to the fixed side pins 122.12.
3. Place the frame on top of the four 142 and 143 pieces so that the frame axis is in the X direction.

After that, the motor 129 is rotated, and the movable pin 12
0.121 in the direction of the arrow in FIG.
123. This abutting force is generated by controlling the voltage applied to the motor 129. At the same time, the cam 147 is rotated by the motor 14B to move the movable pins 140 and 141 in the direction of arrow d in FIG. Fix the lower rim with side pin 142
．． 1 and 43. This holding power is
This is due to the biasing force of the spring 151.

Note that the movable side pins 140.141 and the fixed side pins 142.
143 is measured by the linear scale 149 and the encoder body 150, the thickness of the lower rim of the eyeglass frame 230 is counted by the counter 606 at the same time as the eyeglass frame 230 is held in the above procedure. Central processing unit 602 via 10 ports 604
is processed and stored in the lens diameter storage memory 601.

Furthermore, since the groove position of the lower rim of the glasses frame is formed in the vessel at approximately the center of the rim thickness, the absolute height of the groove position with respect to the device is simultaneously adjusted to the lens radial memory memory 60.
1 is stored.

Next, at the start of measurement, the contact 200 is placed at a predetermined position within the frame of the eyeglass frame 230 on the extension of the fixed side pin 143. The position in the X direction is set by rotating the lateral movement base 160 by rotating a gear 163 with a motor 164, and the position in the rotational direction is set by rotating the disc table 180 by rotating a gear 161 with a motor 62. The setting of the reference position of the contactor 200 in the X direction and rotational direction is programmed in advance and is performed by instructing the motor drive circuit 605 using the key means 608, 607.

Thereafter, the motor 218 rotates the gear 217 to move the moving plate 212 to the left in FIG. 4, thereby positioning the contact 200 near the center of the right ball of the eyeglass frame 230.

Further, information on the height of the contactor 200 at that time is obtained from the linear scale 203 and the encoder body 204, and information data on the groove height of the rim obtained previously is obtained from the lens radial storage memory 601 and compared. The screw 210 is rotated by the motor 211 so that the height of the cuff 200 and the groove height of the rim match, and the ring 206, shaft 227, and plate member 2 are rotated by the motor 211.
05. The disc type contactor is moved up and down via the vertical shaft 202 and the green plate 201.

Next, the gear 217 is rotated by the motor 21B to move the screw 210 to the right in FIG. Turn the screw 210 until the screw 210 is fully separated.
move to the right.

Next, the disc table 180 is rotated 3601 times by the gear 161, and the rotation center 08 of the disc table 180 and the radius r of the center of the disc type contactor 200 at that time are measured by making them correspond to the rotation angle 0. Dimensional data P++n(r+++, θ□
, h□〉 are obtained and stored in the lens diameter storage memory 601. The radius r at this time is measured by the encoder body 188 based on the rotation of the gear 186 meshed with the rank 185.

Next, the contact 200, which is now located on the extension of the fixing pin 143 and in contact with the rim groove, is moved again by moving the screw 210 to the left in FIG. is brought into contact with the screw 210, and the disc-shaped contact 200 is moved to near the center of the right ball.

Next, the screw 210 is rotated to move the ring 206 downward. That is, the contactor 200 is moved sufficiently downward relative to the rim of the glasses frame.

Subsequently, the gear 163 is rotated by the lateral movement motor 164, and the lateral movement base 160 is moved to the left in FIG. 5 by a predetermined distance 1111S.

At this time, the disc-shaped contactor 200 also moves to the left by the circuit Is in conjunction with the lateral movement base l60.

Next, in the same procedure as when measuring the stonework mentioned above, the information on the large ball is stored in the lens diameter storage memory 601 obtained as three-dimensional data Ptn (rtn, θ, 7, hLj. The center of rotation of the board table 180 is assumed to be OL.The calculation of the frame shape based on the data obtained as described above will be explained with reference to FIGS. 6 and 7. 2D information Pan(ra,,
, θ□), PL,.

When converting (r Lm, θLa) into orthogonal coordinates in which the moving direction of the lateral movement base 160 (measuring system reference axis) is the y-axis, and the vertical direction of the measurement center during masonry measurement is the y-axis, the left and right frame shape data ( X□, YIIR), (XL, l, YLR)
are respectively X 1n = r @, 1cosθ111% Yla=
r +++m sinθhX Lll-r LlI
CO5θ111 3% Yta-rLB SinθL1
It becomes 1.

Next, the centers of gravity Q, , QL of the stone mason and the large ball are Qm
= (q□, q□) = (ΣX□8, ΣY1..mu) QL
-(Q ra, Q ty) -(ΣXLa 8, ΣYL,
8).

However, the number of samplings n at this time does not need to be equal to the number of points at which the frame shape was measured, and can be calculated using several representative points.

A straight line J connecting the left and right centers of gravity Q and QL serves as the reference axis of the glasses frame 230. This reference axis indicates how much the frame horizontal is deviated from the measurement system reference axis when setting the frame, and is generally the astigmatism axis when astigmatic eyeglass lenses are fitted into eyeglass frames. This is an item that requires absolute accuracy.

The angle θ1 of the reference axis J of this eyeglass frame with respect to the measurement reference axis is determined by the following equation.

θ+=tan −' (Qry Qty / QFI
Therefore, the polar coordinates of the measured frame shape data based on the frame reference axis J are R'RhCr,, θ17-θI), P'Ln(rLn
, θ1 - θ1).

Then, the orthogonal coordinates based on the frame reference axis J, (X's-, Y'a, ,), (X'L, l, Y't-
) is Tsuretsure xi, 1-rllllcos(θ□-θ1)
Y'++a-r l+ 5in(θ□-θI)X'ee rL, 1cos(θLll-θ,) -3/cosY'
, a= r La 5in(θLR-θ1). Thereafter, frame shape data will be treated as data with this frame reference axis J as the y-axis.

Next, the maximum and minimum values of the X and Y coordinates of the left and right frame shapes are determined and determined as follows.

Right frame shape data X coordinate maximum value, minimum value X, □0, X5□.

Y coordinate maximum value, minimum value Y, □8, Y, □0 Left frame shape data X coordinate maximum value, minimum 41LXL □8, XL, .

Y coordinate maximum value, minimum value YL□, , YL□7 From this, the nose width of the frame is determined by X, □n YLa□.

In addition, the boxing system center Ba (Bt-1B-j,
Bt (B, x, BLy) are B, X= <
x,,,,-x*,t,)/2,Bty-(Ym□-
YR-,,,)/2,BL,-(XL,,,-X,,i
,)/2,BL,-(YL,□-Yt-t,l)/
2. Therefore, when the coordinates of the frame shape are moved to a system with the center of the boxing system as the reference (center), the new positional second display is as follows: The right frame shape data is (Xl,, BIIX, Yl-B11y), and the left frame shape data is (X , fi-BLX, Y, , -BL,).

This left and right data is stored in the lens radial storage memory 6°l.

- In lens processing work, where the frame shape data is treated as numerical data and the lens is processed based on the shape data, a suction rubber is adsorbed to the optical center of the lens, and the lens is attached to the lens rotation axis of the polishing machine. to process the lens.
For this reason, the frame shape data necessary for processing with the Tamazuri machine requires a frame shape with the optical center as the origin, and the frame shape data with an arbitrary measurement center is calculated into a frame shape with the center of the boxing system as the origin. Then, in order to calculate the amount of shift to the optical center, input means 608 and 607 input keys manually, and the central processing unit 602 uses the calculation program 603 to calculate the amount of vertical shift, the human eye PD, and the frame. PD (FPD
), the astigmatic axis is manually adjusted to obtain the value of the amount of deviation, and the value is stored in the lens diameter storage memory 601. The shape data stored in the lens diameter storage memory 601 is used as the frame shape with the center of the boxing system as the origin.

Further, various data stored in the lens radial storage memory 601 are transmitted to the data display device 6 via the data display circuit 609.
10 is displayed.

[Effect 3 of the invention As described above, according to the present invention, the shapes of the right frame and the left frame of the frame shape can be automatically measured, and the moving distance of the disc-type contact moving means can also be measured, so that the nose of the frame can be measured automatically. The width can be calculated by calculation, and there is no need to manually enter the frame's convergence value using keys afterwards. There is also the effect that data with better accuracy than before can be obtained.

Furthermore, the frame setting when measuring the frame shape is
It is possible to freely layout not only the Y force direction but also the axis degree, which makes frame setting easier, and because the reference axis can be obtained by calculation from various measurement data in one frame set, the axis There is also the advantage of improved accuracy.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of an embodiment of the device according to the invention, FIG. 2 is a plan view showing an embodiment of the device according to the invention, and FIG. 3 is a detailed view illustrating the measuring section of the device according to the invention. , FIG. 4 is a sectional view taken along the line A-A' in FIG. 1, FIG. 5 is a sectional view taken along the line B-B' in FIG. The figure is a diagram explaining the nose width of the frame shape, and FIG. 8 is a block diagram showing the number of operations and the control circuit. [Explanation of symbols of main parts] 120.121...Movable side pin, 122.123.142.143...Fixed side pin, 1
40.141... Vertical movement pin, 144... Pin vertical member, 129.14B, 211.218... Motor 162
...Table rotation motor, 164... Lateral movement motor, 150.18B, 204... Encoder body, 160
... Lateral movement base, 161 ... Gear, 180 ... Disc table, 181 ... Moving member, 200 ... Disc type contactor, 201 ... Raw plate, 202 ... - Vertical shaft, 205... plate-shaped member, 20 &... ring, 210... eagle, 212... moving plate.

Claims (1)

[Claims] a holding means for holding an eyeglass frame; a detection section for a lens fixing groove that is inserted into and removed from a rim of the eyeglass frame; a measurement means for measuring the shape of the rim into which the detection section is inserted; and the detection section. and the measuring means relative to each other in the direction of the pair of rims, and means for calculating the shape of the eyeglass frame from the data of the measuring means and the amount of movement of the moving means. Shape measurement position of eyeglass frames.