KR20070035522A - Contour reading appliance comprising an effort sensor - Google Patents

Abstract

The present invention relates to a method of reading a shape on an article, such as a lens frame of eyeglasses, wherein the method uses a device including a support and a rotating platform for holding the article, the platform being associated with the support about an axis of rotation. Rotate and mount and support a reading subset with a sensor 8 consisting of a finger 9 and a rod 12, the finger 9 having a distal end. According to the method of the invention, the distal end is arranged along the contour and the continuous position of the distal end is detected. The method comprises the steps of measuring the force exerted between the platform and the rod 12 in parallel to the rod; and the finger 9 in such a way that the strength of the force is kept below a predetermined threshold. And a control step in which the distance between the platform and the platform is controlled according to the force.

Glasses, frames, lens frames, supports, rotating platforms, fingers, rods, contour readings.

Description

CONTOUR READING APPLIANCE COMPRISING AN EFFORT SENSOR}

FIELD OF THE INVENTION The present invention relates to the general field of dimensional measuring devices used in the manufacture of individual customized eyeglasses, and more particularly to a contour reader and a contour reading method applied to measuring the shape of an article disposed on a support using a sensor. It is about. The article sensed by the sensor is generally a lens frame or spectacle lens of the spectacles.

For example, the apparatus may be formed in a groove vertically recessed in the lens frame of the glasses, that is, along a thin and long line in the interior of the lens frame of the glasses, and the groove for fixing the lens in the lens frame of the glasses. Used to measure. To achieve this object, a sensor is inserted inside the groove, and while the sensor is moving along the contour of the groove, the device stores a digital image of the contour of the groove in the storage while recording coordinates indicating the position of the sensor. do. In this way, the spectacle lens in the pre-processing state may be completely inserted into the lens frame of the spectacles cut along the grooves.

A contour reader of this kind is disclosed in US Pat. No. 5121550. The reader disclosed in this patent document includes a support for holding an article to be sensed with a sensor. The circular plate is installed in such a way that it rotates about the support, which plate has a sensor-mounted reading sub-set. The sensor includes a rod and a finger extending from the rod. The distal end of the finger is provided to be able to move along the curve of the contour.

The reading subset includes a slide, which is mounted on the slide in such a way that the carriage connected to the sensor moves.

The device records the position of the sensor in polar coordinates along the course of the movement of the sensor. In the polar coordinates the angular dimension θ corresponds to the rotational movement of the rotating platform and the radial dimension ρ corresponds to the translational movement of the carriage on the slide.

The finger moves within the bottom of the elongated groove in the lens portion, and the finger and the groove maintain contact with each other by the action of a radial force applied to keep the finger and the groove in contact with each other.

Since the article to be sensed by the sensor has three directions, the sensor must be able to move along the z-axis, which coincides with the direction of movement perpendicular to the plane including the ρ and θ dimensions.

Devices of this kind include a motor, which first continues to move the sensor along the z axis until it faces the groove. When the finger makes contact with the groove while translating along the slide, the motor is disengaged or passive, freeing the movement along the z-axis direction while the contour is read.

In the case where the article to be read is a rented frame of spectacles showing a slight curve, the upper and lower movement width along the z-axis direction of the sensor is small, and the finger can be kept in easy contact with the bottom of the groove.

On the other hand, if the curve of the lens frame of the glasses is clear and thus the upper and lower movement width along the z-axis becomes large, it is difficult for the finger to move freely along the z-axis so that the finger is maintained at the bottom of the groove.

For example, if the finger moves along a very clear curve, it is desirable to reduce the rotation speed in order to avoid the risk of leaving the bottom of the groove.

In addition, the contour reader disclosed in US Pat. No. 6325700 has a device which can calculate the upper and lower widths of the contour to be read in three directions, especially the z-axis, to prevent the finger from deviating from the bottom of the groove. Can be. The calculating device estimates and calculates a portion to be driven along the z-axis in the future based on the coordinates of the positions of the portions where the driving is already completed. The motor provided for determining the position of the sensor along the z axis is controlled according to the calculation result. The sensor is guided while moving along the contour, but there is no guarantee that the finger can be held at the bottom of the groove.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of reading a contour that can consider the simplicity and convenience of product use and can supplement the above-mentioned problems. It is a further object of the present invention to provide a reader applicable to all types of contours suitable for implementing such contour reading methods.

The contour reading method provided by the present invention for achieving the above object is for an article, such as a lens frame of glasses, in a manner to rotate around the axis of rotation R with respect to the support and the support for holding the article. Use a device with an installed rotating platform. The rotating platform has a subset including a finger and a sensor having a rod extending transverse to the finger, the finger having a distal end. The contour reading method comprising moving the distal end along the contour and recording successive positions of the distal end, wherein the moving step is applied in a direction parallel to the rod between the rotating platform and the rod. Measuring a losing force and controlling the distance between the finger and the rotating platform according to the force such that the strength of the force can be maintained below a predetermined threshold.

As above, the point where the finger is placed every minute in the distance between the rotating platform and the finger coincides with the point of constant force on which the article to be read is exerted on the sensor. This allows the finger to move along a predetermined course and above all can prevent the finger from deviating from the contour. In addition, the measurement of the force in only one direction facilitates the measurement.

In addition, the contour reader according to the present invention is for an article such as a lens frame of glasses, and includes a support for holding the article and a rotating platform installed in such a manner as to rotate about a rotation axis with respect to the support. The rotating platform has a subset comprising a finger and a sensor having a rod extending transverse to the finger, the finger having a distal end provided to move along the contour, wherein the contour reader is configured to: A set motor comprising a member extending generally transverse to said rod, said rod being fixed on said member, said drive motor of said member being provided for controlling said distance between said finger and said rotating platform An force sensor disposed on the member and for measuring a force subject to the member along a direction parallel to the rod, the force sensor coupled to the actuation force sensor and the motor and the strength of the force; The motor so that is maintained at a level below a predetermined threshold Groups is characterized in that it comprises a suitable control device.

By determining the position of the member relative to the rod, it is possible to use a relatively large and available receiving space under the plate. In addition, by separating the actuation force sensor from the finger in the accommodation space, it prevents external access of the actuation force sensor, thereby enabling the actuation force sensor to be protected from failure or dust caused by inadvertent mistake of the user.

The control device according to an embodiment of the present invention has a control performance capability for the motor, so that when the force is applied in the first direction, the strength of the force is maintained at a level below a first allowable threshold value, and the force When applied in a second direction opposite to the first direction, the strength of the force can be maintained at a level below the second acceptable threshold. As such, when the sensor reads the lens frame of the glasses, the finger is located in close proximity to the bottom of the groove every moment. At the bottom of the groove the force is zero and readings can be made at high speed.

Copiers comprising a sensor head and a finger are already known in US Pat. No. 5,534,79. Such a device is provided with a throat and an actuation force sensor capable of measuring the force applied on the finger. Is provided to the department. The actuation force sensor measures that the finger moves minutely along three directions with the sensor head as a reference point. This minimal movement coincides with the force exerted on the finger by the throat.

The throat tracking device disclosed in Japanese Patent Laid-Open Publication No. 5477119 includes such a sensor head. The device disclosed in the patent document is based on the force sensed by the sensor so that the force in the transverse direction with respect to the finger is zero and the force of the force in the direction of the major axis of the finger is consistent with the expected value. The interlock of the sensor head is controlled. Accordingly, the finger is located at the center of the throat to maintain contact with the bottom. In addition, the device is provided with a position sensor capable of sensing the position of the sensor in three reference directions along the contour. The reference point of the stationary support of the device is also recorded.

The volume of the actuation force sensor must provide a small and reduced volume, but because it is located at the distal end, it is not only largely exposed outward, but also the sensor must record the force position in three directions and adjust the position of the sensor head in three directions. Therefore, there is a relatively complicated aspect (the apparatus according to the present invention can provide the same result as above in only one direction).

Another aspect of the invention in terms of simplicity and convenience of manufacture and use is:

The member is a first support member, the subset comprising a second support member protruding transversely with respect to the plate, the subset further comprising a first support member on the axis of rotation on the second support member. Installed in such a way as to translate in parallel directions; In some cases

The rotatable platform comprises a lighting device, the rod extending between the lighting devices, the finger being located on the first side of the plate, while opposite the second supporting member, the first supporting member, and the finger A proximal distal end of the rod positioned in the direction is located at the second side of the plate; And / or

The second support member comprises a support shaft; And / or

The first support member is a support arm having two distal ends and including a small plate, two thin films parallel to each other extending transversely from the distal ends of the support arm, each thin film being in the axis of rotation; Wherein the sleeve extends to each other at two distal ends of the membranes opposite the fingers, the sleeve being suitably provided to surround the proximal distal end of the rod; In some cases

One of the distal ends of each thin film opposite the small plate is provided with a circular opening suitable for receiving the rod enclosed in the sleeve; And / or

The second support member comprises a support shaft and the support arm comprises a bushing, the bushing being fixed about the support shaft about a central axis via a linear bearing, the linear bearing translating the bushing relative to the support shaft. To exercise; In some cases

The drive motor comprises a pinion and the pinion is engaged with a rack operating in conjunction with the bushing; And / or

The drive motor comprises a coding device to detect the position of the first support member relative to the second support member; And / or

The first member is also installed in a manner that rotates around the second member; And / or

The actuation force sensor comprises a detection element and a flag located opposite each other; In some cases

The detection element is an optoelectronic element; And / or

The first support member is a support arm comprising a small plate providing two distal ends, the two thin films parallel to one another extending transversely from the distal ends of the support arm, the detection element and the flag Is located between the two thin films; In some cases

The detection element and the flag are respectively fixed on the small plate and the sleeve and the sleeve extends to each other at two distal ends opposite the small plate of the ends of the membranes, the subset being connected to the drive motor. An associated signal processing unit, the element including a detection device for detecting a position of a flag relative to the device and a transmission device for transmitting a signal to the processing unit in accordance with a result of the position detection;

The sensor is movable in the transverse direction with respect to the axis of rotation as much as it is movable in the direction parallel to the axis of rotation.

Hereinafter, other features and advantages of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a perspective view showing a contour reader according to the present invention;

FIG. 2 is a schematic view similar to that of FIG. 1, in the form of a lens frame of glasses provided for the purpose of being recorded by a sensor, the contour reader containing the frame

3 is a perspective view from below of the rotating platform to illustrate a subset of readings supported by the rotating platform;

4 is a perspective view showing a portion of a reading subset, including a sensor, a support arm and an actuation force sensor;

5 is a schematic view showing a state in which a force is applied to a sensor including thin films of the rod and the supporting arm portion;

6A through 6C are schematic views showing three types of directions in which forces are applied on the sensor, the finger, and the throat boot according to the position of the finger in the throat portion; And

7 is a schematic diagram illustrating the principle of feedback control with respect to sensor position.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a schematic diagram illustrating the outline reader in a ready-to-use state. The device 1 comprises a top cover 2, which covers the entire device except the center top.

The rotating platform 6 is installed in such a way that it rotates with respect to the chassis 5 of the device 1. The rotatable platform 6 comprises an illuminating device 7 which is circular and extends in the longitudinal direction, in which a sensor 8 protrudes between the illuminating devices 7. The sensor has a rod 12 mounted at the distal end of the finger 9.

The device 1 of FIG. 1 is provided for use in accommodating the spectacle frame 10.

As shown in FIG. 2, the device 1 comprises a tightening device of the spectacle frame 10, which has two jaws 3 and four clamps parallel to one another. The clamps, each comprising two fixed supports 4, are located on the jaws 3 and face each other with the clamps of another jaw 3.

The distance between the at least one jaw portion 3 and another jaw portion may be narrowed or distant from each other so that the spectacle frame 10 may be tightened. In the position where the spectacle frame 10 is tightened, along the vertical direction when the spectacle frame is mounted inside the apparatus 1 and the spectacle frame is supported by the support and fixed in the horizontal direction, the clamps face each other and the image of the spectacle frame Located in The fixed supports 4 provided in each clamp can capture the lens frames of the eyeglass frame 10 and hold the eyeglass frame fixed for reading.

As shown in Figure 2, the jaw portion (3) can be close to each other to maintain the eyeglass frame 10 in the horizontal direction. The fixed supports 4 support the lens frames of the spectacles. As such, the lens frames 10 of the respective glasses are prepared to be detected by the sensor. The detection of the sensor is made so that the entire section of the lens frame of the eyeglass is covered along the start course and along the groove of the eyeglass frame 10 while the sensor is inserted at a predetermined position between the two fixed supports 4.

In the embodiment according to the invention, the device 1 is equipped with jaws suitable for fixing the position of the spectacle frame, but other tightening devices are, for example, clamps for positioning the spectacle lens to which the outer contour is to be recorded. Note the fact that it can be used.

The chassis 5 is provided as a support plate, in which is provided a circular cut 11 with a diameter slightly larger than the diameter of the rotating platform 6. The circular cut 11 accommodates the rotary platform 6, which is guided by three crosshead roller guides (not shown) arranged regularly along the perimeter of the rotary platform.

The roller guides are alternately controlled by a motor-equipped coding device (not shown) so that the rotary platform 6 rotates by user manipulation and each position of the rotary platform can be recorded every moment.

The arcuate lighting device 7 has a length approximately coincident with the radius of the rotating platform 6 and extends between the center of the rotating platform 6 and the rotating platform.

The lighting device 7 is also fixed to the central axis around the A axis (see FIG. 3).

As shown in FIG. 3, the tapered groove 14 is disposed along the rim of the rotating platform. The tapered groove 14 enables positioning and driving of the rotating platform relative to the chassis 5 by means of a roller guide with a motor mounted thereon.

The rotating platform 6 has a reading subset 15, which includes the main bearing 16. A support shaft 17 is installed on the main bearing and the support shaft is fixed on the rotating platform 6 by rivets (not shown). The support shaft 17 is fixed to the A axis as a center axis.

The support arm 18 is mounted on the support shaft 17 via a linear bearing 19. One distal end of the support arm 18 comprises a bushing which surrounds the linear bearing 19 and the support shaft 17. Through the linear bearing 19, the support arm 18 can rotate around the A axis and translate along the axis.

The distal end of the support arm 18, which is located opposite the bushing 20, has a cylindrical sleeve 21, in which the rod 12 is in a position parallel to the support shaft 17. The rod 12 is enclosed.

4 is a schematic view showing the support arm 18.

The support arm 18 is generally rectangular.

Two thin films having the same shape extend in the transverse direction at two end portions of the small plate 40 which are almost rectangular.

Here, each of the thin films 41 and 42 has a triangular shape, and distal ends of the respective thin films positioned in the opposite direction to the small plate 40 are rounded. Each of the thin films 41 and 42 has a circular opening (not shown) suitable for receiving the sleeve 21, and the rod 12 is surrounded by the sleeve 21.

The small plate 40 is provided with a reinforcing plate 49, which is fixed to the small plate 14 by two pairs of screws 43 and 44. In addition, the two pairs of screws 43, 44 secure the small plate 40 to the bushing 20. The first pair 43 includes two screws and is horizontal with the compact plate 40 at the same height as the surface.

The second pair 44 includes longer screws, each transverse to the small plate 40 and extending through the duct 45 to oppose the small plate 40 of the support 46 for the device. On the surface located in the direction, the element support 46 is fixed in parallel with the small plate 40. An optoelectronic device 47 is provided in the support 46 for the device, which includes two wall portions 48. The wall portions 48 are parallel to each other and cross the thin films 41 and 42 and the small plate 40. The optoelectronic device 47 is provided to be suitable for detecting the position of the flag 51 mounted between the two wall portions 48 of the optoelectronic device 47 by measuring the light beam.

One of the two wall portions 48 includes an optical transmitter and another wall portion includes an optical receiver. The optical receiver generates an output signal having a value that is transmitted from the optical transmitter and varies according to the amount of light received by the optical receiver. The thin films 41 and 42, the element 47 and the flag 51 form an operating force sensor. The electrical signal is transmitted by a signal transmission device (not shown) of the element 47 to the motor-coding device 31 to be described below. The transmission device may be, for example, an RF transmitter, a connection wire, or the like.

The sensor 8 comprises a rod 12 for the sensor, which rod 12 provides a finger 9 at the distal end opposite the arm 18. The rod 12 is fixed by the sleeve 21 around two openings. The sleeve 21 surrounds the rod between two openings and the sleeve 21 extends slightly further in the direction in which the finger 9 is located. The rod 12 is secured with screws and nuts 50 in the openings of the membrane 41 corresponding to the proximal distal ends located opposite the fingers 9.

The sleeve 21 has a flag 51 between two membranes 41, 42, which occupies a portion of the space in which one of the corners of the flag 51 is located between the two wall portions 48. Stretched to make.

Each of the thin films 41 and 42 imparts overall rigidity by its shape, but each of the thin films 41 and 42 provides some flexibility to bend in a direction parallel to the rod 12.

By providing the thin films 41 and 42 which hold the sensor 8 fixed, the supporting arm 18 obtains the lateral flexibility. In addition, by holding the sensor 8 fixed at the positions of the two openings, it is possible to prevent the pivoting of the sensor, which may occur when the sensor 8 is attached on only one thin film.

As above, the actuation force sensor 64 is located in a zone that provides a relatively wide and usable accommodation space within the device 1. When the device 1 is ready for use, access from the outside of the actuation force sensor 64 is blocked, so that the actuation force sensor is not only dust but also external intervention, and above all, an unconscious machine of the user of the apparatus 1. To be protected from manipulation. This can prevent the occurrence of abnormalities in all functions of the actuation force sensor 64.

Due to the fact that the support arm 18 is installed in such a way as to rotate around the A axis, the sensor 8 arcs along the lighting device 7 in a plane transverse to the axis of rotation R of the rotating platform 6. You can move in the shape of. Here, the rotation axis R is parallel to the A axis. In addition, the sensor 8 can perform the entry / exit movement of the finger 9 relative to the surface of the rotating platform 6 when the support arm 18 slides along the A axis. When the device is in operation, only a portion of the finger 9 and the rod 12 are out and the rest of the subset 15 is located on the other side of the rotating platform.

The reading subset 15 also includes a guide arm 22, which is connected to the base of the shaft 17 via a roller (not shown). The roller allows the guide arm 22 to only make rotational movement around the A axis. The guide arm 22 has a longitudinal length sufficient to reach the position of the lighting device 7 and includes a fixing support 24 and a roller 25 at positions facing each other with the lighting device 7. do.

The fixing support 24 and the roller 25 are arranged in parallel and spaced apart from each other at an interval substantially coinciding with the thickness of the rod 12.

The guide arm portion 22 is installed in a manner that rotates on the support arm portion 17 so that the fixing support portion 24 and the roller 25 are independent of each position of the guide arm portion 22 around the A axis. Are in opposite positions to each other. The supporting arm 18 and the guide arm 22 are arranged such that the rod 12 can be enclosed between the fixing support 24 and the roller 25. In this way, the support arm 18 and the guide arm 22 angularly move around the A axis.

The guide arm part 22 also includes a toothed and bow-shaped half-lens part 26 and is fixed about the A axis. The teeth of the semi-lens portion 26 are engaged with the idler pinion 27, and the idler pinion 27 is engaged with the pinion (not shown) of the motor-coding device 28 installed on the connector 29. . The connector 29 is fixed on the rotating platform 6. The teeth of the idler pinion 27 are not shown in the figure for clarity.

The guiding arm 22 also includes a vertical connector 29 arranged in equilibrium with respect to the A axis, on which the motor-coding device 31 is fixed. The pinion 32 of the motor-coding device 31 engages with the rack 33 fixed on the bushing 20 of the support arm 18. The rack 33 is arranged parallel to the A axis. The teeth of the pinion 32 are not shown in the figures for clarity as well as the reasons described above.

The motor-coding device 31 includes a control device (not shown) suitable for receiving an electrical signal and suitable for determining whether to control the movement of the pinion 32 in accordance with the signal.

Coding devices of the motor-coding devices 28, 31 are provided to record the position of the sensor 8 with respect to the radial and vertical directions.

As shown in FIGS. 5 and 6A-6C, the sensor 8 may apply a contact pressure on the contour during the reading. This pressure results from the radial force applied by the motor-coding device 28.

The contour to be read here is the groove 60 of the lens frame of the glasses, and the groove 60 takes the form of a throat having two branches 61 and 62 having a "V" shape. The finger for the sensor moves inside the groove located on the two branches 61, 62. The bottom portion 63 of the groove 60 is defined as the connection portion of the branches 61 and 62.

The direction parallel to the A-axis and the sensor rod 12 is defined as the z-axis direction, and the radial direction of the groove 60 forming the curved portion is defined as the p-axis direction.

The contact pressure is applied along the p-axis direction, whereby a force applied by the groove 60 on the tip 65 provided on the finger 9 is generated along the z-axis direction. When the tip 65 is in contact with the branch 61, the force in the z-axis direction is directed to the branch 62 along the first direction, and when the tip 65 is in contact with the branch 62. The force in the z-axis direction is directed toward the branch 61 along the second direction. When the tip is in contact with the bottom portion 63 of the groove 60, the force in the z-axis direction applied on the groove 60 becomes zero (0).

FIG. 5 is a schematic diagram showing the states of the thin films 41 and 42 when the tip 65 is in abutting position with the branch 62. The z-axis force applied on the tip 65 is transmitted to the rest of the sensor 8, thereby deforming the thin films 41, 42 that cooperate with the sensor 8.

The flag 51 operating in conjunction with the sensor 8 performs the microscopic movement in accordance with the deformation of the thin films 41 and 42 in front of the immobile element 47. The change in the light flux is detected by the element 47.

As shown in FIG. 7, the actuation force sensor 64 is connected to the processing unit 66 by a cable, which processing unit is provided to be suitable for receiving an electrical signal transmitted by the actuation force sensor 64. . The electrical signal coincides with the luminous flux. The processing unit 66 is connected to the motor 31 by a cable, and the electrical coupling between the processing unit 66 and the motor 31 is a bidirectional coupling.

The processing unit 66 processes the signal while comparing the signal received from the actuation force sensor 64 with a predetermined set point. Here, the set value coincides with the force value in the zero state. The processing unit 66 then transmits the corresponding output signal to the motor 31. On the other hand, the motor 31 transmits a signal corresponding to a position along the z-axis direction of the sensor to the processing unit 66.

Specifically, the detection of the flag 51 which has made the minimum movement relative to the reference position causes the element 47 of the actuation force sensor 64 to transmit a signal which corresponds to the minimum movement of the flag, and above all, to the direction of the flag. To the processing unit 66. The processing unit 66 performs a comparison with the set values expected in the processing unit 66. If the value is not equal to or lower than the set value, the processing unit 66 instructs the motor 31 to activate the pinion 32.

Accordingly, the pinion 32 engages the rack 33 located in the direction opposite to the minimal movement of the sensor 8, i.e., in the direction of decreasing force in the z-axis direction on the finger 9.

More generally, the finger 9 and the contour are fitted to each other while the sensor finger 9 is positioned at a desired height with the motor 31 and the contact with the finger 9 and the contour with the motor 28 is in contact with each other. Positioning the finger 9 so that it can be reached can start the contour reading. The motor 28 is steered so that the sensor 8 can exert a constant contact pressure against the contour. Here, by holding the finger 9 in the bottom portion 63 of the groove 60, compared with the force applied in the radial direction of the conventional devices, the force applied in the radial direction can be reduced, the radial direction It can be maintained at a constant pressure within the range of.

Thereafter, the crosshead roller guides are controlled so that the rotary platform 6 can fully reciprocate the course that matches the entire reciprocation of the contour to be detected by the sensor.

And, the rotation speed of the rotating platform 6 is relatively high.

During this rotational movement, the actuation force sensor 64 measures the force exerted on the arm 18, which coincides with the force the article applies to the finger 9. In response to this force, the motor 31 controls the distance between the finger 9 and the rotating platform 6 while driving the sensor 8.

More specifically, the motor 31 depends on the setting value from the processing unit 66. When the force coincides with the set value, the motor is driven while the finger 9 is engaged with the article and moves along the shape of the article, where the finger 9 is positioned relative to the A axis (rotating platform 6). And acts only as a coding device to detect the position where the support arm 18 continuously moves along the height).

According to one variant of the invention, an allowable limit value (except zero) of the force detected by the element 47 is set. Below the allowable threshold, the tip 65 is considered to be in a sufficiently close position with the bottom of the groove, even if the tip 65 is not exactly at the bottom 63 of the groove 60.

According to another variant of the invention, the allowable threshold values of the detected forces are set to two differently. When the finger is in contact with the branch 62, that is, when the force is directed in the direction of the branch 61, the allowable limit of force that should not be exceeded is the first of the two values described above. When the finger is in contact with the branch 61, the tolerance value reflected is the second value.

According to one not shown embodiment of the present invention and through the necessary modifications, the present invention can also be applied for lens reading. In the case of a lens with a narrow groove, the finger is the same as the finger of the eyeglass frame described above. When the contour of the lens has a convex shape, the back of the sensor has a concave shape. Further, the recess receives the force in the direction of the z axis and the force is sensed by the same operating force sensor as the above-described operating force sensor.

According to one not shown embodiment of the present invention, the actuation force sensor may be a strain gauge or a piezoelectric shim.

One embodiment of the device according to the invention has been described herein. The invention is also applicable to devices presenting embodiments relating to the kinematic movement of the sensor by modifying members that enable various movements.

Claims (17)

Finger 9 with a distal end, comprising a support 3, 4 for holding the article and a rotating platform 6 installed in such a way as to rotate about the axis of rotation R with respect to the support 3, 4. And a device having a subset 15 of the platform comprising a sensor 8 with a rod 12 extending laterally with respect to the finger, wherein the distal end moves along the contour of the article. A method of reading a contour of an article, such as a lens frame of eyeglasses, comprising the steps of: and recording consecutive positions of the distal end; The moving step measures the force exerted in a direction parallel to the rod between the rotating platform 6 and the rod 12, and the finger so that the strength of the force can be maintained below a predetermined threshold And (9) controlling the distance between said rotating platform (6) according to said force. The contour reader 1 comprises a support 3, 4 for holding an article and a rotating platform 6 installed in such a manner as to rotate about an axis of rotation R with respect to the support 3, 4, and The rotating platform 6 comprises a sensor 8 including a finger 9 which is movable along the contour and has a distal end; and a rod 12 extending transverse to the finger 9. In the contour reader 1 for an article, such as a lens frame of a spectacle frame 10, having a set, suitable for implementing the contour reading method according to claim 1, The subset 15 comprises a body 18 extending transversely with respect to the rod 12, on which the rod 12 is fixed and the subset 15 being , The drive motor 31 of the member 18 provided to control the distance between the finger 9 and the rotary platform 6, applied to the member in a direction parallel to the rod 12. An actuation force sensor 64 provided for measuring a force and disposed on the member 18, and connected to the actuation force sensor and the motor, such that the strength of the force can be maintained below a predetermined threshold value; 31. A contour reader for an article, such as a lens frame of eyeglasses, characterized in that it comprises a control device adapted to control.  3. The method of claim 2 wherein the strength of the force when the force is applied in the first direction is maintained below a first allowable threshold value and the strength of the force when the force is applied in the second direction opposite to the first direction is zero. 2 Contour reader for an article, such as a lens frame of eyeglasses, characterized in that the control device has the ability to control the motor (31) so that it can be kept below an acceptable limit. 4. The member according to claim 2, wherein the member is a first support member 18 and the subset 15 comprises a second support member 17 protruding transversely with respect to the rotating platform 6. And on said sub set (15) a first support member (18) is arranged to be able to translate in a parallel direction with respect to the axis of rotation (R). 5. The rotating platform (6) according to claim 4, wherein the rotating platform (6) has a lighting device (7), the rod (12) extending between the lighting devices, and the finger (9) located on the first side of the rotating platform. On the other hand, around the distal end located in the second support member 17, the first support member 18 and the rod 12 in the opposite direction to the finger is located on the second side of the rotating platform 6. Characterized in that the contour reader for an article such as a lens frame of glasses. 6. The contour reader according to claim 4 or 5, wherein the second support member comprises a support shaft (17). 7. A support according to any one of claims 4 to 6, wherein the first support member is a support arm 18, the support arm comprising a small plate 40 having two distal ends, parallel to each other. Thin films 41 and 42 extend in the transverse direction from the two distal ends, and each of the thin films 41 and 42 can be deformed in a direction parallel to the rotation axis R and in a direction opposite to the small plate 40. A sleeve 21 extending between two distal ends of the positioned thin film, wherein the sleeve 21 is provided to suitably surround the periphery of the distal end of the rod 12. Contour reader for the article. 8. The end of each of the thin films (41, 42), the end of which is opposite to the small plate (40), has a circular opening adapted to receive the rod (12) surrounded by the sleeve (21). Contour reader for an article such as a lens frame of eyeglasses. 9. The support member according to claim 7 or 8, wherein the second support member includes a support shaft 17, and the support arm 18 is fixed to the support shaft by a linear bearing 19 about a central axis. The linear bearing (19) is a contour reader for an article such as a lens frame of eyeglasses, characterized in that the bushing (20) allows translational movement about the support shaft (17). 10. The spectacle frame according to claim 9, wherein the drive motor 31 includes a pinion 32, and the pinion 32 is engaged with a rack 33 which works in conjunction with the bushing 20. Contour reader for articles such as lens frames. The method according to any one of claims 4 to 10, wherein a coding device is mounted on the drive motor (31) to detect the position of the first support member (18) relative to the second support member (17). Characterized in that the contour reader for an article such as a lens frame of glasses. 12. The article according to any one of claims 4 to 11, wherein the first member (18) is also installed in a manner that rotates around the second member (17). Contour reader for. The article as claimed in claim 2, wherein the actuation force sensor 64 comprises a detection element 47 and a flag 51 facing each other. Configuration reader for. 14. The contour reader according to claim 13, wherein said detection element (47) is an optoelectronic element. 15. The support arm according to claim 13 or 14, wherein the first support member is a support arm 18, the support arm 18 comprising a small plate 40 having two distal ends, said two distal ends. Two thin films 41 and 42 parallel to each other extend laterally relative to the two distal ends, and the detection element 47 and the flag 51 are located between the two thin films 41 and 42. Contour reader for an article such as a lens frame of eyeglasses. The method of claim 15, wherein the detection element 47 and the flag 51 is installed and fixed to the small plate 40 and the sleeve 21, respectively, the sleeve 21 is a thin film (opposite to the small plate) Extending between the two distal ends of 41 and 42, the lower set 15 comprises a signal processing unit 66 connected to the drive motor 31, and the element 47 has a flag (based on the position of the element). 51. A contour reader for an article, such as a lens frame of glasses, comprising a detection device for detecting the position of 51) and a transmission device for sending a signal to the processing unit according to the position of the flag. 17. The sensor (8) according to any one of claims 1 to 16, characterized in that the sensor (8) is movable in the transverse direction with respect to the rotation axis (R) by moving in the parallel direction with respect to the rotation axis (R). Contour reader for articles such as lens frames of glasses.

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