An apparatus for measuring horizontal decentration of an optical center of a spectacle lens

Abstract

The utility model relates to a lens measuring technical field especially is a kind of equipment for measuring horizontal deviation of optical center of glasses lens, including processing station, processing station is provided with processing mechanism and is used for lens measurement, processing mechanism includes: taking and placing subassembly, including the support of fixed in the top rear end of processing station, the guide component is provided on the support, the upper end of support is fixed with slide rail, the slide rail is horizontally slidably installed with slider, the bottom of slider is fixed with connecting piece, the bottom of connecting piece is fixed with vertical rod, longitudinal sliding installation is provided with slide sleeve on vertical rod, cam is rotatably installed with the rear end of slide sleeve and is located inside guide component, one end of support is pivoted with standard air cylinder, and the output end of standard air cylinder is pivoted with the rear end of connecting piece;Through automatic manipulator, the synchronous taking and placing and accurate positioning of lens are realized, the center deviation is rapidly detected in combination with optical measuring system, form high -efficient continuous detection assembly line, greatly improve detection efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of lens measurement technology, specifically to a device for measuring the horizontal deviation of the optical center of eyeglass lenses. Background Technology

[0002] As a widely used vision correction tool, the precision of eyeglasses' optical performance directly affects the wearer's visual experience and eye health. During the manufacturing process, the optical center of the lens must precisely correspond to the wearer's pupil position; any horizontal deviation can lead to adverse consequences such as visual fatigue, dizziness, or even decreased vision. Therefore, measuring the horizontal deviation of the optical center is a crucial step in the eyeglasses production and quality inspection process.

[0003] According to CN111272111B, a method and device for detecting lens eccentricity are disclosed. This technology discloses a technical solution including "an eccentricity detector and a turntable, a support device, and a rangefinder movably mounted on the support device, wherein the light from the rangefinder is irradiated onto the outer circumference of the lens to be tested". It has the technical effects of "using the rangefinder to measure the horizontal offset of the lens to be tested, so that the horizontal offset can be deducted when calculating the actual eccentricity, thereby eliminating the need to set a centering device, reducing wear on the lens, and improving detection efficiency".

[0004] Existing optical center measurement equipment for eyeglass lenses suffers from significant efficiency bottlenecks in the lens transfer process: traditional single-clamp pick-and-place mechanisms require separate steps for loading, positioning, and unloading when performing measurement tasks. Each lens change requires waiting time for an empty return trip. This intermittent operation mode reduces the effective utilization rate of the equipment, makes it impossible to achieve a continuous testing process, and seriously restricts the improvement of overall production efficiency. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a device for measuring the horizontal deviation of the optical center of eyeglass lenses. It achieves synchronous picking and placing and precise positioning of lenses through an automated robotic arm, and combines it with an optical measurement system to quickly detect center deviation, forming an efficient and continuous testing line that significantly improves testing efficiency and accuracy.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for measuring the horizontal deviation of the optical center of spectacle lenses, comprising a processing table, wherein a processing mechanism is provided on the processing table for measuring the lenses, and the processing mechanism includes:

[0007] The pick-and-place assembly includes a bracket fixed to the rear end of the top of the processing table, a guide component on the bracket, a slide rail fixed to the upper end of the bracket, a slider slidably mounted on the slide rail, a connector fixed to the bottom of the slider, a vertical rod fixed to the bottom of the connector, a sleeve slidably mounted on the vertical rod, a cam rotatably mounted at the rear end of the sleeve and located inside the guide component, a standard cylinder pivotally connected to one end of the bracket, and the output end of the standard cylinder pivotally connected to the rear end of the connector, and a clamping component on the sleeve for gripping the lens;

[0008] A measuring component, set on a processing table, is used for lens inspection.

[0009] Preferably, the guiding component includes a guide plate fixed to the top of the bracket, a transverse groove is provided in the middle of the guide plate, and oblique grooves are provided at both the left and right ends of the guide plate and are connected to the transverse groove, and the oblique grooves at both ends are symmetrically arranged.

[0010] Preferably, the clamping component includes a vertical plate fixed to the front end of the sliding sleeve, a mounting plate fixed to the lower end of the vertical plate, and pneumatic clamps mounted on both ends of the mounting plate.

[0011] Preferably, the measuring component includes a two-dimensional platform mounted on the top center of the processing table, and a positioning fixture is mounted on the two-dimensional platform.

[0012] Preferably, the measuring assembly further includes a stand fixed to the front end of the top of the processing table, on which an optical center is mounted.

[0013] Preferably, a feeding conveyor belt is installed at the top left end of the processing table, and a discharging conveyor belt is installed at the top right end of the processing table.

[0014] Beneficial effects

[0015] This invention provides a device for measuring the horizontal deviation of the optical center of eyeglass lenses. Compared with the prior art, it has the following advantages:

[0016] 1. When the standard cylinder, as the power source, drives the connecting part and the slider to move horizontally along the slide rail, the cam fixed to the rear end of the slide sleeve is constrained by the special curved track of the guide component. Through the interaction between the cam and the track, the horizontal motion is converted into precise longitudinal displacement, forcing the slide sleeve to move along the upright along a predetermined trajectory. This achieves a composite contour motion trajectory of "lifting-translation-lowering" or "lowering-translation-lifting" for the clamping part. This ensures the stability of the posture and the repeatability of the path during the lens picking and placing process, avoids lens scratches or positioning deviations that may be caused by manual operation, and significantly reduces the manufacturing cost of the equipment and the complexity of subsequent maintenance.

[0017] 2. The pneumatic gripper on the left side of the pick-and-place assembly grabs the lens to be tested from the feed conveyor belt and accurately places it on the positioning fixture for optical inspection. At the same time, the pneumatic gripper on the right side synchronously grabs the lens that has been inspected and transfers it from the positioning fixture to the output conveyor belt. This dual-grip collaborative operation mode realizes the "one pick-and-place" synchronous operation of the lens inspection process: when the pneumatic gripper on the left performs the loading action, the pneumatic gripper on the right performs the unloading action simultaneously, so that the replacement of old and new lenses can be completed in a single motion cycle. This not only completely eliminates the idle waiting time required for lens replacement in the traditional single-grip system, but also improves the inspection efficiency through symmetrical operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the measuring component in this utility model;

[0020] Figure 3 This is a schematic diagram of the pick-and-place component in this utility model;

[0021] Figure 4 This is a partial structural diagram of the pick-and-place component in this utility model.

[0022] In the diagram: 1. Machining table; 2. Machining mechanism; 21. Picking and placing assembly; 211. Support; 212. Guide component; 2121. Guide plate; 2122. Horizontal slide rail; 2123. Inclined slide rail; 213. Slide rail; 214. Slider; 215. Connector; 216. Upright; 217. Sliding sleeve; 218. Standard cylinder; 219. Clamping component; 2191. Upright plate; 2192. Mounting plate; 2193. Pneumatic clamp; 22. Measuring assembly; 221. Two-dimensional platform; 222. Positioning fixture; 223. Stand; 224. Optical centering instrument; 3. Feed conveyor belt; 4. Discharge conveyor belt. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 - Figure 4This utility model provides a technical solution: a device for measuring the horizontal deviation of the optical center of spectacle lenses, including a processing table 1, on which a processing mechanism 2 is provided for lens measurement, the processing mechanism 2 including:

[0025] The pick-and-place assembly 21 includes a bracket 211 fixed to the rear end of the top of the processing table 1. A guide component 212 is provided on the bracket 211. A slide rail 213 is fixed to the upper end of the bracket 211. A slider 214 is slidably mounted on the slide rail 213. A connector 215 is fixed to the bottom of the slider 214. A vertical rod 216 is fixed to the bottom of the connector 215. A sliding sleeve 217 is slidably mounted on the vertical rod 216. A cam is rotatably mounted at the rear end of the sliding sleeve 217 and is located inside the guide component 212. A standard cylinder 218 is pivotally connected to one end of the bracket 211, and the output end of the standard cylinder 218 is pivotally connected to the rear end of the connector 215. A clamping component 219 is provided on the sliding sleeve 217 for gripping lenses.

[0026] The measuring component 22 is set on the processing table 1 and is used for lens inspection.

[0027] In this embodiment, when the standard cylinder 218 acts as a power source to drive the connecting piece 215 to move horizontally along the slide rail 213 in conjunction with the slider 214, the cam fixed to the rear end of the sliding sleeve 217 is constrained by the special curved track of the guide component 212. Through the interaction between the cam and the track, the horizontal motion is converted into a precise longitudinal displacement, forcing the sliding sleeve 217 to move along the upright 216 along a predetermined trajectory, thereby realizing the composite contour motion trajectory of the clamping component 219 as "lift-translation-descent" or "descent-translation-lift". This ensures the stability of the posture and the repeatability of the path during the lens picking and placing process, avoids mirror scratches or positioning deviations that may be caused by manual operation, and significantly reduces the equipment manufacturing cost and the complexity of subsequent maintenance.

[0028] Specifically, the guide component 212 includes a guide plate 2121 fixed to the top of the bracket 211. A transverse groove 2122 is provided in the middle of the guide plate 2121. An oblique groove 2123 is provided at both the left and right ends of the guide plate 2121 and is connected to the transverse groove 2122. The oblique grooves 2123 at both ends are arranged symmetrically.

[0029] In this embodiment, when the standard cylinder 218 pushes the connector 215 to move horizontally, the cam fixed to the rear end of the sliding sleeve 217 moves along the groove of the guide plate 2121 and maintains horizontal movement in the transverse sliding groove 2122 section. When the cam enters the inclined sliding groove 2123, the tilt angle of the groove forces the sliding sleeve 217 to produce a precise longitudinal displacement along the upright 216, thereby realizing mechanical lifting and lowering conversion.

[0030] Specifically, the clamping component 219 includes a vertical plate 2191 fixed to the front end of the sliding sleeve 217, a mounting plate 2192 fixed to the lower end of the vertical plate 2191, and pneumatic clamps 2193 installed at both ends of the mounting plate 2192.

[0031] In this embodiment, the lens is grasped synchronously at two points by pneumatic clamps 2193 symmetrically arranged at both ends of the mounting plate 2192.

[0032] Specifically, the measuring component 22 includes a two-dimensional platform 221 installed at the top center of the processing table 1, and a positioning fixture 222 is installed on the two-dimensional platform 221.

[0033] In this embodiment, the precise positioning of the lens is achieved through the coordinated cooperation of the two-dimensional platform 221 and the positioning fixture 222: the two-dimensional platform 221 provides two mutually perpendicular axes for precise movement, enabling the positioning fixture 222 mounted on the platform to be precisely adjusted in the plane; after the clamping component 219 places the lens onto the positioning fixture 222, the operator can control the movement of the two-dimensional platform 221 to precisely align the optical center of the lens with the reference axis of the measurement system.

[0034] Specifically, the measuring component 22 also includes a stand 223 fixed to the front end of the top of the processing table 1, on which an optical center instrument 224 is mounted.

[0035] In this embodiment, after the lens on the positioning fixture 222 has completed its initial positioning, the parallel beam emitted by the optical center instrument 224 penetrates the lens to form an optical pattern. Its built-in image sensor captures the position of the image point after the lens is refracted. By calculating the deviation between the optical image point and the mechanical reference position, the horizontal offset of the optical center of the lens is accurately obtained.

[0036] Specifically, a feeding conveyor belt 3 is installed on the top left end of the processing table 1, and a discharging conveyor belt 4 is installed on the top right end of the processing table 1.

[0037] In this embodiment, the pneumatic clamp 2193 on the left side of the pick-and-place assembly 21 picks up the lens to be tested on the feed conveyor belt 3 and accurately places it on the positioning fixture 222 for optical inspection. At the same time, the pneumatic clamp 2193 on the right side synchronously picks up the lens that has been inspected and transfers it from the positioning fixture 222 to the output conveyor belt 4. This dual-clamp collaborative operation mode realizes the "one pick-and-place" synchronous operation of the lens inspection process: when the pneumatic clamp 2193 on the left performs the loading action, the pneumatic clamp 2193 on the right performs the unloading action simultaneously, so that the replacement of the old and new lenses can be completed in a single motion cycle. This not only completely eliminates the idle waiting time required for lens replacement in the traditional single-clamp system, but also improves the inspection efficiency through the symmetrical operation method.

[0038] The working principle and usage process of this utility model are as follows: First, when the standard cylinder 218, as the power source, pushes the connecting piece 215 and the slider 214 to move horizontally along the slide rail 213, the cam fixed to the rear end of the sliding sleeve 217 is constrained by the special curved track of the guide component 212. Through the interaction between the cam and the track, the horizontal movement is converted into a precise longitudinal displacement, forcing the sliding sleeve 217 to move along the upright 216 according to a predetermined trajectory, thereby realizing the composite contour movement trajectory of the clamping component 219 as "lifting-translation-lowering" or "lowering-translation-lifting". This ensures the stability of the posture and the repeatability of the path during the lens picking and placing process, avoids mirror scratches or positioning deviations that may be caused by manual operation, and significantly reduces the equipment manufacturing cost and the complexity of subsequent maintenance.

[0039] The precise positioning of the lens is achieved through the coordinated operation of the two-dimensional platform 221 and the positioning fixture 222: the two-dimensional platform 221 provides two mutually perpendicular axes for precise movement, enabling the positioning fixture 222 mounted on the platform to be precisely adjusted in the plane; after the clamping component 219 places the lens into the positioning fixture 222, the operator can control the movement of the two-dimensional platform 221 to precisely align the optical center of the lens with the reference axis of the measurement system.

[0040] After the lens on the positioning fixture 222 has completed its initial positioning, the parallel beam emitted by the optical center instrument 224 penetrates the lens to form an optical pattern. Its built-in image sensor captures the position of the image point after the lens is refracted. By calculating the deviation between the optical image point and the mechanical reference position, the horizontal offset of the optical center of the lens is accurately obtained.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for measuring the horizontal decentration of the optical center of a spectacle lens, comprising a machining table (1), characterized in that: The processing table (1) is equipped with a processing mechanism (2) for lens measurement. The processing mechanism (2) includes: The pick-and-place assembly (21) includes a bracket (211) fixed to the rear end of the top of the processing table (1), a guide component (212) is provided on the bracket (211), a slide rail (213) is fixed at the upper end of the bracket (211), a slider (214) is slidably mounted on the slide rail (213), a connector (215) is fixed at the bottom of the slider (214), a vertical rod (216) is fixed at the bottom of the connector (215), a sliding sleeve (217) is slidably mounted on the vertical rod (216), a cam is rotatably mounted at the rear end of the sliding sleeve (217) and located inside the guide component (212), a standard cylinder (218) is pivotally connected to one end of the bracket (211), and the output end of the standard cylinder (218) is pivotally connected to the rear end of the connector (215), and a clamping component (219) is provided on the sliding sleeve (217) for lens gripping; A measuring component (22) is set on a processing table (1) and used for lens inspection.

2. The device for measuring the horizontal deviation of the optical center of spectacle lenses according to claim 1, characterized in that: The guide component (212) includes a guide plate (2121) fixed to the top of the bracket (211). A transverse groove (2122) is provided in the middle of the guide plate (2121). An oblique groove (2123) is provided at both the left and right ends of the guide plate (2121) and is connected to the transverse groove (2122). The oblique grooves (2123) at both ends are symmetrically arranged.

3. The device for measuring the horizontal deviation of the optical center of spectacle lenses according to claim 1, characterized in that: The clamping component (219) includes a vertical plate (2191) fixed to the front end of the sliding sleeve (217), a mounting plate (2192) fixed to the lower end of the vertical plate (2191), and pneumatic clamps (2193) mounted on both ends of the mounting plate (2192).

4. The device for measuring the horizontal deviation of the optical center of spectacle lenses according to claim 1, characterized in that: The measuring component (22) includes a two-dimensional platform (221) installed at the top center of the processing table (1), and a positioning fixture (222) is installed on the two-dimensional platform (221).

5. The device for measuring the horizontal deviation of the optical center of spectacle lenses according to claim 1, characterized in that: The measuring component (22) also includes a stand (223) fixed to the front end of the top of the processing table (1), on which an optical center instrument (224) is mounted.

6. The device for measuring the horizontal deviation of the optical center of spectacle lenses according to claim 1, characterized in that: A feeding conveyor belt (3) is installed at the top left end of the processing table (1), and a discharging conveyor belt (4) is installed at the top right end of the processing table (1).

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