JPH04357401A - Measuring apparatus for shape of eyeglass frame - Google Patents

Abstract

PURPOSE:To continuously measure the shape data of a right and a left frames correctly by a single setting operation and to obtain the correct data on the nose width of the frames. CONSTITUTION:This apparatus is provided with a contact element 200 in contact with a lens fixing groove of eyeglass frames, and encoders 150, 188, 204 for measuring the movement amount of both the moving mechanisms 162, 211,... moving the contact element 200 along the lens fixing groove of each of the right and left frames and the contact element 200. Moreover, there are provided an operating means for operating the shape data of the frames and the data on the width of the nose the frames from the measured movement amount, and holding means 122, 123, ... for gripping each of the right and left frames at two points. When the shape of each of the right and left frames is to be measured, a control means controls the holding means 122, 123 to grip the frame to be measured at two points, and to hold the other frame at one point.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the shape of eyeglass frames.

0002

2. Description of the Related Art A V-shaped groove for fitting a lens is formed in the rim of an eyeglass frame. Conventionally, this type of device for measuring the lens groove shape of eyeglass frames measures the groove shape on either the left or right side of the eyeglass frame (this is called a lens shape) and applies it to the other side, or After measuring the groove shape of the rim, the groove shape of the other rim was measured again by manually setting the groove according to the previously measured procedure. Furthermore, depending on the method of holding the eyeglass frames at that time, the eyeglass frames may become deformed.

0003

[Problems to be Solved by the Invention] In the conventional technology as described above, the frame shape can only be measured for each frame of each eye, and the frame shape of each left and right frame can be measured by this measurement, but the frame nose width However, when grinding the lens afterwards, the person measuring the frame nose width must either actually measure it or use the nominal value displayed on the frame, which is cumbersome. There were also problems with accuracy. Furthermore, depending on the method of holding the eyeglass frame, deformation such as distortion may occur in the eyeglass frame, which hinders accurate measurement.

An object of the present invention is to provide an eyeglass frame shape measuring device that can accurately and continuously measure the left and right lens shapes of an eyeglass frame with one setting.

[0005]

[Means for Solving the Problems] An eyeglass frame shape measuring device for achieving the above object includes a contact element that contacts a lens fixing groove formed on the inner peripheral side of the eyeglass frame frame;
a moving mechanism for moving the contact along the lens fixing grooves of each of the pair of left and right frame frames; a measuring means for measuring the amount of movement of the contact; a calculation means for calculating shape data and frame nose width data; a clamping means for clamping the pair of left and right frames at two places each; and when measuring the shape of the pair of left and right frames, the clamping means The apparatus is characterized by comprising a control means for holding the frame on the measuring side at two places and holding the frame on the non-measuring side at one place.

[0006] Here, the calculation means calculates the center of gravity of each of the pair of left and right frames from the shape data of the frame, and converts the shape data of the frame into a reference passing through the center of gravity and each center of gravity. It is preferable to have a function that allows conversion into values based on the axis. Furthermore, since an astigmatic axis prescription may be applied, it is preferable that the calculation means also have a function of converting the converted shape data into data based on the astigmatic axis.

[0007]

[Operation] First, the eyeglass frame is placed on the device. Then, when the device is started, the clamping means is driven according to instructions from the control means. At this time, the clamping means clamps the frame on the side to be measured at two places, and the frame on the side not to be measured at one place. In this way, the eyeglass frame is held in three places: the frame frame on the side to be measured is held in two places, and the frame frame on the side not to be measured is held in one place, so the eyeglass frame will not be deformed and accurate measurements can be made. Measurements can be taken. Therefore, accurate shape data can be obtained.

Next, the moving mechanism is driven to bring the contact into contact with the lens fixing groove of the frame to be measured.
Move the contactor along the lens fixing groove. The amount of movement in this movement process is measured by a measuring means.

[0009] When the measurement of one frame is completed, the clamping means is driven again to clamp the other frame to be measured in two places, and to clamp the one frame for which the measurement has been completed in one place. . Next, the moving mechanism is driven,
The contactor is brought into contact with the fixing groove of the other frame, and the measurement is also performed on the other frame in the same manner as described above.

[0010] The calculation means calculates the shape data of each frame from the data obtained by measurement. Furthermore, the nose width of the frame is also calculated from the difference in predetermined shape data between the left and right frame frames. In this calculation process, the shape data is converted, so even if you set the eyeglass frames without taking much consideration to the setting position, the frame shape data will be converted based on the reference axis obtained by calculation. This makes it possible to accurately obtain the data required during lens grinding. This is extremely useful, especially when astigmatic axis prescription is required.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An eyeglass frame shape measuring apparatus according to an embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a partially cutaway perspective view of the eyeglass frame shape measuring device of this embodiment, FIG. 2 is a view taken in the direction of arrow II, FIG. 3 is an explanatory diagram for explaining the measuring section, and FIG. 4 is a diagram of FIG. IV in
-IV sectional view, FIG. 5 is a V-V sectional view in FIG. 1,
FIG. 8 is a block diagram of the control circuit.

As shown in FIGS. 1 and 2, shaft support blocks 105, 1 are provided at each corner of the substantially square base 100.
06, 107, and 108 are fixedly installed, and guide rods 103 and 104 parallel to the vertical direction (Y direction) are arranged. The guide rods 103 and 104 include a moving stage 101.
, 102 are fitted to be slidable in the Y direction. Fixed side pins 122 and 123 whose tips extend in the (-)Y direction are implanted in the moving stage 101, and further pin opening/closing motors 124 and 125 are fixed. Pin fixing members 126,
127 is fixed. Pin fixing members 126, 127
, movable side pins 120 and 121 are fixedly provided corresponding to the positions of fixed side pins 122 and 123. Further, fixed side pins 142 and 143 whose tips extend in the (+)Y direction are implanted on the moving stage 102, and a cylindrical member 146, an encoder body 150, and a pin up/down motor 148 are also fixedly installed. There is. A shaft 145 implanted in the pin up and down member 144 is fitted into the cylindrical member 146 so as to be slidable in the up and down direction (Z direction). The pin upper and lower members 144 have fixed side pins 1 to which the movable side pins 140 and 141 correspond.
42, 143, and a linear scale 149 is fixed by the encoder body 150 to detect the vertical position of the movable pins 140, 141. This vertically moving member 144 includes a moving stage 102.
One end of the tension spring 151 is fixedly attached to the other end of the tension spring 151. A cam 147 that comes into contact with the vertical movement member 144 is fixed to the shaft of the pin vertical motor 148 . The vertically moving member 144 moves vertically according to the outer peripheral shape of the cam 147.

Axial support blocks 108, 109, 110, and 111 are fixed at each corner of the back surface of the base 100, and guide rods 165 and
166 are arranged. At the bottom of the base 100, there is a
As shown in FIG. 2, a lateral movement base 160 is disposed that has a substantially rectangular shape and has a circular hole formed in its center. A guide rod 165 is provided at each corner of this lateral movement base 160.
, 166 and a horizontal shaft support member 167, 1 that is slidably fitted to the
68, 169, and 170 are fixedly installed. 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 rack 113 fixed to the back surface of the base 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.

A base 100 is mounted on the lateral movement base 160.
A disc table 180 is arranged concentrically with the center of the circular hole. A gear is formed on the outer periphery of this disc table 180, and this gear meshes with the gear 161 of the table rotation motor 162. The disc table 180 is shown in FIG.
As shown in FIG. 2, holes formed in the lateral movement stage 160 are used as guide surfaces to rotatably engage the lateral movement stage 160 by stepped rings 196, 197, and 198 rotatably provided at three locations on the disc table 180. It matches.

A moving member 181 that can move in the Y direction in the state shown in FIG. 3 is also arranged on the disc table 180. One side of the moving member 181 is slidably fitted into a guide rod 182 supported by guide support plates 183 and 184 fixed to the disc table 180. Further, a ring 191 is attached to the other side of the moving member 181.
is rotatably provided, and this ring 191 rolls in a groove of a guide member 190 fixed to the disc table 180 in parallel with the guide bar 182.

A guide rod 18 is provided on the end surface of the moving member 181.
A rack 185 is fixedly installed in parallel with the disc table 18.
It meshes with a gear 186 fixed to the shaft of an encoder 188, which is fixed to the lower surface of the encoder 188. One end of a tension spring 189 is applied to one end of the moving member 181 in parallel with the guide rod 182, and the other end of the tension spring 189 is connected to the disc table 1.
It is set to 80. Furthermore, the moving member 181 has
A guide section is provided parallel to the vertical direction (Z direction),
A vertical shaft 202 is fitted therein so as to be slidable in the Z direction.

A U-shaped member 201 is fixed to the upper end of the vertical shaft 202 to which a disk-shaped contact 200 that contacts the rim groove of the frame is fixed. Further, a plate member 205 is fixed to the lower end of the vertical shaft 202, and as shown in FIGS. 4 and 5, a shaft 226 extending in the (-)X direction is implanted at one end of the plate member 205. A rotatable ring 209 is attached to the shaft 226, and is fitted into a groove of a rotation stopper plate 207 fixed to the lower part of the moving member 181 to prevent the vertical shaft 202 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 203 is fixed to one side of the plate member 205, and an encoder main body 204 is fixed to the lower part of the moving member 181. Note that a shaft 227 extending in the (-) Z direction is provided on the lower surface of the plate member 205.
is implanted, and a rotatable ring 206 is attached to its shaft.

A support plate 225 having an L-shaped cross section is fixed to the lower surface of the lateral movement base 160. Support plate 22
Guide shafts 219 and 220 are provided on the upper surface of the guide shaft 5 and are arranged parallel to the guide shafts 103 and 104, and a movable plate 212 is slidably attached to the guide shafts 219 and 220. Guide shafts 219 and 22 are provided on the end surface of the moving plate 212.
A rack 216 is fixed parallel to 0 and meshes with a pinion 217 attached to a motor 218 fixed to the lower surface of the support plate 225. Further, a motor 211 is fixed to the lower surface of the moving plate 212, and a screw 210 is fixed to the motor shaft and engaged with the ring 206.

As shown in FIG. 8, a control device that performs various calculations based on the operation of each motor 148, 164, .
A motor drive circuit 605 that drives... and a counter 6 that counts values from each encoder 150, 188,...
06, a data display device 610 that displays various data, a data display circuit 609, a key input means 608 that inputs various data, etc., a key input circuit 607, an I/O port 604, and a central unit that performs various calculations. Arithmetic processing unit 602
, a calculation program memory 603 that stores programs for various calculations and operation control, and a lens shape memory memory 601 that stores data obtained by calculations.

In this embodiment, the calculation means is composed of the calculation program memory 603 and the central processing section 602, and the control means is composed of the motor drive circuit 605, the calculation program memory 603, the central processing section 602, and It consists of Further, the clamping means includes a movable pin 120,
120, vertically movable pins 140, 143, and fixed side pin 1
22, 123, 142, 143 and pin opening/closing motor 1
24, 125, a pin up/down motor 148, etc.

The operation of the frame shape measuring device constructed as described above will be explained below. First, as shown in FIG. 4, the pin opening/closing motors 124 and 125 are driven to open the movable pins 121 and 120 in the direction of arrow a. The opening amount of the movable pins 121 and 120 is controlled by the key input means 60.
8 to input an appropriate opening amount, process this in the calculation program 603 and central processing unit 602, and input the processed value to the motor drive circuit 605 via the I/O port 604. be exposed.

Furthermore, the pin up/down motor 148 is driven to move the movable pins 140, 141 in the direction of arrow c. The pin up/down member 144 is urged downward by a spring 151, but the cam 147 in contact with the pin up/down member 144 rotates and moves in the direction of arrow c in the figure against the urging force of the spring 151. The pin upper and lower members 144 move. Of course, the movable pin 14 fixed to the pin upper and lower members 144
0 and 141 move in conjunction with each other in the direction of arrow c. The rotation amount of the cam 147 is controlled by the key input means 608 as described above.
, 607.

Next, the eyeglass frame 230 is placed on the four fixed side pins 122, 123, 142, and 143 so that the frame axis is approximately parallel to the X direction. after that,
The pin opening/closing motor 124 is driven, and the movable pin 121
is moved in the direction of arrow b in FIG. This clamping force is achieved by controlling the voltage applied to the pen opening/closing motor 124. At the same time, the pin up/down motor 148 is driven to move the movable pins 140, 141 as shown in FIG.
The lower rim of the eyeglass frame 230 is held between the fixed side pins 142 and 143. This clamping force is due to the biasing force of the spring 151. At this time, the eyeglass frame 230 is held in three places: the upper rim and lower rim of the left frame, and the lower rim of the right frame.

The height of the movable side pins 140, 141 with respect to the fixed side pins 142, 143 is measured by the linear scale 149 and the encoder body 150 at the same time as the eyeglass frame 230 is held in the above procedure. This value is
It is counted by a counter 606, processed as a value of the thickness of the lower rim of the eyeglass frame 230 by the central processing unit 602 via the I/O port 604, and stored in the lens shape memory memory 601 as data D1. Generally, the groove position of the lower rim of an eyeglass frame is formed approximately at the center of the rim thickness, so the absolute height of the groove position relative to the device is calculated and stored in the lens shape memory memory 601 as data D2. .

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 determined by driving the lateral movement motor 164 to rotate the pinion 163, and this rotation is performed by driving the table rotation motor 162 to rotate the gear 161. The above-mentioned settings of the X direction of the contactor 200 and the reference position for starting rotation are programmed in advance, and are performed by the central processing unit 602 instructing the motor drive circuit 605. After that, motor 21
8 to rotate the gear 217 and move the moving plate 212 to the left in FIG. 4, the contact 200 is positioned 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 the data on the groove height of the rim obtained previously is stored in the lens shape memory memory 601.
The screw 210 is rotated by the motor 211 so that the height of the contactor 200 and the groove height of the rim match, and the ring 206, shaft 227, plate member 205, vertical shaft 202, and U-shaped member are Disk type contactor 2 via 201
Move 00 up and down.

Next, the gear 217 is activated by the motor 218.
4 to move the screw 210 to the right in FIG. During this movement process, the disc-shaped contact 200 comes into contact with the groove of the rim, and the contact 200 and the moving member 181 stop. On the other hand, the screw 210 separates from the ring 206 and moves further to the right, and stops when the screw 210 separates from the ring 206 sufficiently. Subsequently, the table rotation motor 162 is driven to rotate the disc table 180 by 360 degrees, and the rotation center OR of the disc table 180 and the radius r of the center of the disc type contactor 200 at that time are made to correspond to the rotation angle θ. and measure
Three-dimensional data PRn (rRn, θRn, hRn) is obtained and stored in the lens shape memory 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 rack 185. When the three-dimensional data PRn of the entire inner circumference of the right frame of the frame is acquired, the contact 200 is at the position at the start of measurement, that is, on the extension of the fixing pin 143 and in contact with the rim groove. be. Next, the contactor 200 in this state is moved again by moving the screw 210 to the left in FIG.
10 and move the disc-shaped contact 200 to near the center of the right ball. Next, screw 210 is rotated to move ring 206 downward. That is, the contact 20
0 sufficiently downward relative to the rim of the eyeglass frame 230.

Next, the gear 163 is rotated by the lateral movement motor 164, and the lateral movement base 160 is moved by a predetermined distance S in the (-)X direction, that is, to the left in FIG. At this time, the disc type contactor 200 also moves in the (-)X direction by the same distance S in conjunction with the lateral movement base 160. Next, the pin opening/closing motor 124 is rotated to open the movable pin 121, and at the same time, the pin opening/closing motor 125 is rotated to bring the movable pin 120 into contact with the upper rim of the left frame of the frame, and the fixed pin 122 is rotated. be held by. Next, the left ball's three-dimensional data PLn (rLn, θLn, hL
n) and store it in the lens shape memory memory 601.
is memorized. The center of rotation of the disc table 180 at this time is assumed to be OL.

Calculation of the frame shape based on the data obtained as described above will be explained with reference to FIGS. 6 and 7. Two-dimensional data PRn(r
When converting Rn, θRn), PLn (rLn, θLn) into orthogonal coordinates with the moving direction of the lateral movement base 160 (measuring system reference axis) as the x axis and the vertical direction of the measurement center when measuring the right ball as the y axis, Left and right frame shape data (XRn, YRn),
(XLn, YLn) are, respectively, XRn=rRncosθRn, YRn=rRnsinθ
RnXLn=rLncosθLn−S, YLn=rLn
sin θLn.

Next, based on this frame shape data,
As shown in FIG. 6, the respective centers of gravity QR of the right ball and left ball,
Find QL. The centers of gravity QR and QL are expressed by the following equations.

[0031]

[Math 1]

Note that the number of samplings n at this time does not have to be equal to the number of points at which the frame shape was measured, and may be calculated using several representative points.

A straight line J connecting the left and right centers of gravity QR and QL serves as the reference axis of the eyeglass frame 230. This reference axis indicates how much the horizontal angle of the frame deviates from the measurement system reference axis when setting the frame, and is generally used as the reference axis for astigmatism when fitting spectacle lenses with astigmatism 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. θ1=tan￣1(qry-qLy/qrx-qLx)
In order to convert the reference axis J of the frame data measured here into the XY coordinate with the new reference axis, first convert it to the XY coordinate centered on the center of gravity of the right ball. , Y1Rn), (X1Ln, Y1Ln
) are expressed as follows. X1Rn=XRn-qRx Y1Rn=YRn-qRy X1Ln=XLn-qRx Y1Ln=YLn-qRy Next, when this orthogonal coordinate representation is converted to polar coordinate representation, the following equation is obtained.

[0034]

[Math 2]

Next, a value obtained by shifting the previously obtained reference axis J from the measurement reference axis by an angle θ1 is obtained and is expressed as follows.

R′Rn(r1Rn, θ1Rn−θ1)P
'Ln(r1Ln, θ1Ln-θ1) Then, it is an orthogonal coordinate display with the frame reference axis J as the reference (X'R
n, Y'Rn) and (X'Ln, Y'Ln) are each expressed as follows. X'Rn=r1Rncos(θ1Rn-θ1)Y'Rn
=r1Rnsin(θ1Rn-θ1)X'Ln=r1L
ncos(θ1Ln-θ1)Y'Ln=r1Lnsin
(θ1Ln−θ1) Thereafter, frame shape data will be treated as data with this frame reference axis J as the x-axis.

Next, the maximum and minimum values of the X and Y coordinates of the left and right frame shapes are determined as follows. Right frame shape data X coordinate maximum value, minimum value XR max, XR min
Y coordinate maximum value, minimum value YR max, YR min
Left frame shape data X coordinate maximum value, minimum value XL max, XL min
Y coordinate maximum value, minimum value YL max, YL min
As a result, the nose width of the frame is
It is determined by R min - YL max.

Furthermore, boxing system centered BR (B
Rx, BRy) and BL (BLx, BLy) are each BRx=(XR max-XR min)/2BRy
=(YR max-YR min)/2BLx=(XL
max-XL min)/2BLy=(YL max
−YL min)/2. Therefore, when the coordinates of the frame shape data are moved to a system with the center of the boxing system as the reference (center), the new coordinate display is as follows: The right frame shape data is (X'Rn-BRx, Y'Rn-BRy), and the left frame shape data is (X'Ln-BLx, Y'Ln-BLy).

This left and right data is stored in the lens shape memory memory 601. When it is necessary to prescribe the astigmatic axis for a lens, before converting the frame shape data to a coordinate system based on the center of the boxing system,
The astigmatism axis is input using the key input means 608 and converted into a coordinate system based on this axis, and then converted into a coordinate system based on the center of the boxing system. Typically,
When it is necessary to perform astigmatic axis prescription, it is necessary to match the reference axis of the measurement system and the frame reference axis.
It takes a lot of effort to set the eyeglass frame on the shape measuring device, and it is not possible to accurately align the measurement system reference axis with the frame reference axis. However, in this embodiment, the center of gravity of the frame is calculated, and the frame shape data obtained by measurement is converted using a reference axis passing through the left and right centers of gravity as a reference, and when an astigmatic axis prescription is required, Furthermore, since this data can be converted to data based on the astigmatism axis, it is possible to obtain the data necessary for lens grinding without spending time and effort on setting eyeglass frames.

In general, in lens processing work in which frame shape data is treated as numerical data and lenses are 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 abrasive machine. Attach and process the lens. For this purpose, the frame shape data necessary for processing with a beading machine is frame shape data with the optical center as the origin. Therefore, the input means 608,
607, the human eye PD is input, and using this human eye PD and the frame PD (nose width of the frame) obtained by calculation, frame shape data with the center of the boxing system as the origin is generated with the optical center as the origin. The frame shape data is converted into data with the optical center as the origin based on the shift amount. At this time, the lens processor may also use the amount of vertical adjustment, so this value can also be entered, and the amount of adjustment that takes into account the amount of vertical adjustment, human eye PD, and frame PD is calculated, and this amount is used. You can also convert the data using The above series of operations is performed by the calculation program memory 6.
The central processing unit 602 operates based on a program stored in the CPU 03. The finally obtained frame shape data is stored in the lens shape memory memory 601.
is memorized. Various data stored in the lens shape memory memory 601 are displayed on a data display device 610 via a data display circuit 609.

As described above, according to this embodiment, it is possible to continuously measure the shape data of the left and right frames in one set, and to obtain accurate frame nose width from the amount of movement of the contactor 200. Can be done. In addition, even if you do not take the setting position into account when setting eyeglass frames, the frame shape data is converted based on the reference axis obtained by calculation, so the data necessary for lens grinding is can be obtained accurately. This is extremely useful, especially when astigmatic axis prescription is required. Furthermore, when measuring the frame shape data, the eyeglass frame 230 is held in three places: the frame frame on the side to be measured is held in two places, and the frame frame on the side that is not being measured is held in one place. The eyeglass frame 230 is not deformed and accurate measurements can be made.

[0042]

As described above, according to the present invention, it is possible to continuously measure the shape data of the left and right frames in one set, and to obtain accurate frame nose width from the amount of movement of the contact. Can be done.

Furthermore, when obtaining frame shape data by measurement, since the eyeglass frame is held in three places, the eyeglass frame is not deformed and accurate data can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an embodiment of an eyeglass frame shape measuring device according to the present invention.

FIG. 2 is a view taken along arrow II in FIG. 1;

FIG. 3 is an explanatory diagram for explaining a measuring section of an embodiment of the eyeglass frame shape measuring device according to the present invention.

4 is a sectional view taken along the line IV-IV in FIG. 1. FIG.

FIG. 5 is a sectional view taken along the line V-V in FIG. 1.

FIG. 6 is an explanatory diagram for explaining frame shape calculation.

FIG. 7 is an explanatory diagram for explaining calculation of the nose width of the eyeglass frame.

FIG. 8 is a circuit block diagram of a control device of an embodiment of the eyeglass frame shape measuring device according to the present invention.

[Explanation of symbols]

100 base, 101, 102... moving stage, 120
, 121...Movable side pin, 122, 123, 142, 14
3...Fixed side pin, 140, 143...Vertical movable pin, 144
...Pin upper and lower members, 124, 125...Pin opening/closing motor,
148...Pin up and down motor, 150, 188, 204...
Encoder main body, 160... Lateral movement base, 162... Table rotation motor, 164... Lateral movement motor, 180... Disc table, 181... Moving member, 200... Disc type contact, 201... U-shaped member, 202... Vertical axis, 205... plate member, 210... screw, 211... contactor vertical movement motor,
212...Movement plate, 218...Contact horizontal movement motor, 2
30...eyeglass frame, 601...lens shape memory memory,
602... central processing unit, 603 calculation... program memory, 605... motor drive circuit.

Claims (2)

[Claims] 1. A contact element that comes into contact with a lens fixing groove formed on the inner peripheral side of an eyeglass frame frame, and the contact element is moved along each of the lens fixing grooves of a pair of left and right frame frames. a moving mechanism, a measuring means for measuring the amount of movement of the contact, a calculation means for calculating shape data and frame nose width data of the frame from the measured amount of movement, and each of the pair of left and right frames. A clamping means that clamps the frame at two places, and when measuring the shape of the pair of left and right frames, the clamping means clamps the frame on the side to be measured at two places, and the frame on the side that is not being measured. An eyeglass frame shape measuring device comprising: a control means for clamping the frame at one location. 2. The calculating means calculates the center of gravity of each of the pair of left and right frames from the shape data of the frame, and calculates the center of gravity of the pair of left and right frames from the shape data of the frame and a reference axis passing through the center of gravity and the respective center of gravity. The eyeglass frame shape measuring device according to claim 1, wherein the eyeglass frame shape measuring device is capable of converting into a reference value.