Lens positioning mechanism for metrological verification of optometry lens box

Abstract

The utility model belongs to the technical field of lens positioning, and particularly relates to a lens positioning mechanism for metrological verification of an optometry lens box, which comprises a base, threads on a first lead screw are symmetrical and opposite in direction, and a first sliding block and a second sliding block are symmetrically assembled in a sliding groove. A first clamping plate is rotatably mounted on the first supporting rod through a bearing, a protractor is fixedly mounted on the rear wall of the first supporting rod, a pointer is fixedly mounted on the rotating rod, a worm gear fixedly sleeves the rotating rod, an angle adjusting knob is welded to one side of the worm, and the first clamping plate is driven by the rotating rod to rotate. The first clamping plate drives the lens to rotate, and the lens drives the second clamping plate to rotate, namely the first clamping plate, the second clamping plate and the lens synchronously rotate, so that angle adjustment of the lens is realized, various parameter performance detection on the lens is facilitated, continuous disassembly and assembly of the lens are avoided, damage to the lens is reduced, and meanwhile, verification steps are simplified; and the positioning convenience can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lens positioning, in particular to a lens positioning mechanism used for metrological verification of optometry lens boxes. Background Art

[0002] Trial lenses are lenses embedded in frames and used to measure human eye refractive errors. In practical applications, the combination of various trial lenses is called a trial lens box. Trial lens boxes need to be calibrated according to regulations. During the calibration process, it is usually necessary to test multiple parameter performances of the lenses. During this process, a lens positioning mechanism is required to fix the lenses.

[0003] A Chinese patent with publication number CN217637383U discloses a lens positioning mechanism for metrological calibration of trial lens boxes, including a calibration component and a positioning component, wherein the calibration component includes a support, and a display screen is arranged on the front of the support. The lens positioning mechanism for metrological calibration of trial lens boxes, when needed, first prepares a matching auxiliary lens, then places the connecting block on the plate body by docking the slot with the insertion rod, and after placement, places the lens to be used on the inner side of the second semi-ring body, so that the fold of the auxiliary lens, that is, the geometric center, can be relied on. After adjustment, pull the telescopic rod to stretch the spring, and then twist the telescopic rod to move the limit rod to the top of the lens, release the telescopic rod and the spring rebounds to fix the lens, thereby avoiding the problem of affecting the final detection result due to the inconvenience of aligning the lens with the geometric center of the lens support.

[0004] The existing lens positioning mechanism cooperates with the testing equipment to fix the lens. During this process, it is usually necessary to test various parameter performances of the lens, and the lens needs to be constantly disassembled and installed, which is cumbersome to operate and easily damages the lens, increasing the difficulty of the calibration process and resulting in low convenience of positioning. Therefore, in view of the above problems, a lens positioning mechanism for metrological calibration of trial lens boxes is proposed. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve the problems existing in the prior art, the utility model provides a lens positioning mechanism for metrological verification of an optometry lens box.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the utility model describes a lens positioning mechanism for metrological verification of an optometry lens box, comprising a base, a support plate slidably connected to the base, a slide groove being provided on the support plate, a first screw rod being rotatably installed on the inner wall of the slide groove through a bearing, a distance adjustment knob being welded on one side of the first screw rod, the thread directions on the first screw rod being symmetrically opposite, a first slider and a second slider being symmetrically arranged in the slide groove, a first support rod being welded on the first slider, a first clamping plate being rotatably installed on the first support rod through a bearing, a rotating rod being rotatably installed on the first support rod through a bearing, one side of the rotating rod being fixedly connected to the first clamping plate, a protractor being fixedly installed on the rear wall of the first support rod, a pointer being fixedly installed on the rotating rod, and a worm gear being fixedly sleeved on the rotating rod. Two groups of fixing blocks are fixedly installed on the rear wall of the first support rod, and a worm is rotatably installed on the fixing block through a bearing, and the worm and the worm wheel are meshed with each other, and an angle adjustment knob is welded on one side of the worm. By turning the angle adjustment knob, the worm is driven to rotate, and the worm drives the worm wheel to rotate. The worm and the worm wheel structure has self-locking property, and the worm wheel drives the rotating rod to rotate, and the rotating rod drives the first clamping plate to rotate, and the first clamping plate drives the lens to rotate, and the lens drives the second clamping plate to rotate, that is, the first clamping plate, the second clamping plate and the lens rotate synchronously, so as to realize the angle adjustment of the lens, and the pointer is driven to rotate by the rotating rod, and the pointer points to the scale of the protractor to observe, so as to realize the precise adjustment of the lens angle, facilitate the performance detection of various parameters of the lens, avoid the continuous disassembly and installation of the lens, reduce the damage of the lens, simplify the verification steps at the same time, and help to improve the convenience of positioning.

[0007] Preferably, a second support rod is welded on the second slider, a second clamping plate is rotatably mounted on the second support rod via a bearing, the first clamping plate and the second clamping plate are symmetrically arranged, and rubber pads are mounted on the first clamping plate and the second clamping plate. By placing the lens between the first clamping plate and the second clamping plate and rotating the distance adjusting knob, the first screw rod drives the first slider and the second slider thereon to move relative to each other synchronously, the first slider and the second slider drive the first support rod and the second support rod to move relative to each other synchronously, the first support rod and the second support rod drive the first clamping plate and the second clamping plate to move relative to each other synchronously, and the first clamping plate and the second clamping plate clamp and fix the lens, which is beneficial to improving positioning efficiency.

[0008] Preferably, a movable groove is provided on the base, and a second screw rod is rotatably installed on the inner wall of the movable groove through a bearing, a fine-tuning knob is welded on one side of the second screw rod, and a movable block is assembled in the movable groove, and the movable block is sleeved on the outer periphery of the second screw rod, and the movable block slides in cooperation with the second screw rod through a thread, and the top side of the movable block is fixedly connected to the support plate, and the second screw rod is driven to rotate by rotating the fine-tuning knob, and the second screw rod drives the movable block thereon to move horizontally, and the movable block drives the support plate to move horizontally, and the support plate drives the clamped lens thereon to move horizontally, thereby realizing fine-tuning of the lens in the horizontal direction, so that the lens is aligned with the optical path of the calibration equipment, which is beneficial to improving the positioning accuracy.

[0009] The utility model is beneficial in that:

[0010] 1. The utility model drives the worm to rotate by rotating the angle adjustment knob, and the worm drives the worm wheel to rotate. The worm and worm wheel structure has self-locking property, and the worm wheel drives the rotating rod to rotate, and the rotating rod drives the first clamping plate to rotate, and the first clamping plate drives the lens to rotate, and the lens drives the second clamping plate to rotate, that is, the first clamping plate, the second clamping plate and the lens rotate synchronously, so as to realize the angle adjustment of the lens, and the pointer is driven to rotate by the rotating rod, and the pointer points to the scale of the protractor, so as to realize the precise adjustment of the rotation angle of the lens, facilitate the performance detection of various parameters of the lens, avoid the continuous disassembly and installation of the lens, reduce the damage of the lens, simplify the verification steps at the same time, and help to improve the convenience of positioning.

[0011] 2. The utility model places the lens between the first clamping plate and the second clamping plate, and rotates the distance adjustment knob to drive the first screw rod to rotate, the first screw rod drives the first slider and the second slider thereon to move relative to each other synchronously, the first slider and the second slider drive the first support rod and the second support rod to move relative to each other synchronously, the first support rod and the second support rod drive the first clamping plate and the second clamping plate to move relative to each other synchronously, the first clamping plate and the second clamping plate clamp the lens and fix it, so as to improve the positioning efficiency, and by rotating the fine-tuning knob to drive the second screw rod to rotate, the second screw rod drives the moving block thereon to move horizontally, the moving block drives the support plate to move horizontally, and the support plate drives the clamped lens thereon to move horizontally, thereby realizing fine-tuning of the lens in the horizontal direction, so that the lens is aligned with the optical path of the calibration equipment, which is beneficial to improving the positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a schematic diagram of a three-dimensional structure from a first-person perspective;

[0014] Figure 2 It is a schematic diagram of the three-dimensional structure of the angle adjustment component;

[0015] Figure 3 It is a schematic diagram of the three-dimensional structure of the distance adjustment component;

[0016] Figure 4 It is a schematic diagram of the three-dimensional structure of the fine-tuning component.

[0017] In the figure: 1. base; 2. support plate; 3. slide groove; 4. first screw rod; 5. pitch adjustment knob; 6. first slider; 7. second slider; 8. first support rod; 9. first clamping plate; 10. rotating rod; 11. protractor; 12. pointer; 13. worm gear; 14. fixed block; 15. worm; 16. angle adjustment knob; 17. second support rod; 18. second clamping plate; 19. rubber pad; 20. moving groove; 21. second screw rod; 22. fine-tuning knob; 23. moving block. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-4As shown, a lens positioning mechanism for measuring and verifying an optometry lens box comprises a base 1, a support plate 2 is slidably connected to the base 1, a slide groove 3 is provided on the support plate 2, a first screw rod 4 is rotatably mounted on the inner wall of the slide groove 3 through a bearing, a distance adjustment knob 5 is welded to one side of the first screw rod 4, the threads on the first screw rod 4 are symmetrically opposite, a first slider 6 and a second slider 7 are symmetrically assembled in the slide groove 3, a first support rod 8 is welded to the first slider 6, a first clamping plate 9 is rotatably mounted on the first support rod 8 through a bearing, a rotating rod 10 is rotatably mounted on the first support rod 8 through a bearing, and one side of the rotating rod 10 is connected to the first The splint 9 is fixedly connected, a protractor 11 is fixedly installed on the rear wall of the first support rod 8, a pointer 12 is fixedly installed on the rotating rod 10, a worm gear 13 is fixedly sleeved on the rotating rod 10, two sets of fixed blocks 14 are fixedly installed on the rear wall of the first support rod 8, a worm 15 is rotatably installed on the fixed block 14 through a bearing, the worm 15 and the worm gear 13 are meshed with each other, an angle adjustment knob 16 is welded on one side of the worm 15, a second support rod 17 is welded on the second slider 7, a second splint 18 is rotatably installed on the second support rod 17 through a bearing, the first splint 9 and the second splint 18 are symmetrically arranged, and the first splint 9 and the second splint 18 is provided with a rubber pad 19, a moving groove 20 is provided on the base 1, a second screw rod 21 is rotatably installed on the inner wall of the moving groove 20 through a bearing, a fine-tuning knob 22 is welded on one side of the second screw rod 21, a moving block 23 is assembled in the moving groove 20, the moving block 23 is sleeved on the outer periphery of the second screw rod 21, the moving block 23 slides with the second screw rod 21 through a thread, and the top side of the moving block 23 is fixedly connected to the support plate 2; when working, the existing lens positioning mechanism cooperates with the detection equipment to fix the lens, and in this process, it is usually necessary to detect various parameter performances of the lens, and the lens needs to be continuously disassembled. The unloading and installation are cumbersome to operate and are easy to damage the lens, which increases the difficulty of the verification process and leads to low convenience of positioning. The lens is placed between the first clamping plate 9 and the second clamping plate 18, and the distance adjustment knob 5 is turned to drive the first screw rod 4 to rotate. The first screw rod 4 drives the first slider 6 and the second slider 7 thereon to move relative to each other synchronously. The first slider 6 and the second slider 7 drive the first support rod 8 and the second support rod 17 to move relative to each other synchronously. The first support rod 8 and the second support rod 17 drive the first clamping plate 9 and the second clamping plate 18 to move relative to each other synchronously. The first clamping plate 9 and the second clamping plate 18 clamp and fix the lens.

[0020] By rotating the fine-tuning knob 22, the second screw rod 21 is driven to rotate, the second screw rod 21 drives the moving block 23 thereon to move horizontally, the moving block 23 drives the support plate 2 to move horizontally, and the support plate 2 drives the lens clamped thereon to move horizontally, thereby achieving fine-tuning of the lens in the horizontal direction, so that the lens is aligned with the optical path of the calibration equipment;

[0021] By rotating the angle adjustment knob 16, the worm 15 is driven to rotate, and the worm 15 drives the worm wheel 13 to rotate. The structure of the worm 15 and the worm wheel 13 is self-locking, and the worm wheel 13 drives the rotating rod 10 to rotate, and the rotating rod 10 drives the first clamping plate 9 to rotate, and the first clamping plate 9 drives the lens to rotate, and the lens drives the second clamping plate 18 to rotate, that is, the first clamping plate 9, the second clamping plate 18 and the lens rotate synchronously, thereby realizing the angle adjustment of the lens, and the pointer 12 is driven to rotate by the rotating rod 10, and the pointer 12 points to the scale of the protractor 11, thereby realizing the precise adjustment of the lens angle, facilitating the performance detection of various parameters of the lens, avoiding the continuous disassembly and installation of the lens, reducing the damage of the lens, and simplifying the verification steps at the same time, which is conducive to improving the convenience of positioning.

[0022] Working principle: the existing lens positioning mechanism cooperates with the detection equipment to fix the lens. During this process, it is usually necessary to detect various parameter performances of the lens, and the lens needs to be constantly disassembled and installed. The operation is cumbersome and it is easy to damage the lens, which increases the difficulty of the inspection process and leads to low convenience of positioning. By placing the lens between the first clamping plate 9 and the second clamping plate 18, turning the distance adjustment knob 5, the first screw rod 4 is driven to rotate, and the first screw rod 4 drives the first slider 6 and the second slider 7 thereon to move relative to each other synchronously, and the first slider 6 and the second slider 7 drive the first support rod 8 and the second support rod 17 to move relative to each other synchronously, and the first support rod 8 and the second support rod 17 drive the first clamping plate 9 and the second clamping plate 18 to move relative to each other synchronously, and the first clamping plate 9 and the second clamping plate 18 clamp and fix the lens; by turning the fine-tuning knob 22, the second screw rod 21 is driven to rotate, and the second screw rod 21 drives the moving block 23 thereon to move horizontally, and the moving block 2 3 drives the support plate 2 to move horizontally, and the support plate 2 drives the lens clamped thereon to move horizontally, thereby realizing fine adjustment of the lens in the horizontal direction, so that the lens is aligned with the optical path of the calibration equipment; by rotating the angle adjustment knob 16, the worm 15 is driven to rotate, and the worm 15 drives the worm wheel 13 to rotate. The structure of the worm 15 and the worm wheel 13 is self-locking, and the worm wheel 13 drives the rotating rod 10 to rotate, and the rotating rod 10 drives the first clamping plate 9 to rotate, and the first clamping plate 9 drives the lens to rotate, and the lens drives the second clamping plate 18 to rotate, that is, the first clamping plate 9, the second clamping plate 18 and the lens rotate synchronously, thereby realizing the angle adjustment of the lens, and the pointer 12 is driven to rotate by the rotating rod 10, and the scale of the protractor 11 pointed by the pointer 12 is observed, thereby realizing the precise adjustment of the lens angle, facilitating the performance detection of various parameters of the lens, avoiding the continuous disassembly and installation of the lens, reducing the damage of the lens, simplifying the calibration steps, and facilitating the convenience of positioning.

[0023] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A lens positioning mechanism for measuring and verifying an optometry lens box, characterized in that The invention comprises a base (1), a support plate (2) being slidably connected to the base (1), a slide groove (3) being provided on the support plate (2), a first screw rod (4) being rotatably mounted on the inner wall of the slide groove (3) via a bearing, a pitch adjustment knob (5) being welded on one side of the first screw rod (4), the thread directions on the first screw rod (4) being symmetrically opposite, a first slider (6) and a second slider (7) being symmetrically mounted in the slide groove (3), a first support rod (8) being welded on the first slider (6), a first clamping plate (9) being rotatably mounted on the first support rod (8) via a bearing, and a first clamping plate (9) being mounted on the first support rod (8) A rotating rod (10) is rotatably mounted via a bearing, one side of the rotating rod (10) is fixedly connected to the first clamping plate (9), a protractor (11) is fixedly mounted on the rear wall of the first support rod (8), a pointer (12) is fixedly mounted on the rotating rod (10), a worm wheel (13) is fixedly sleeved on the rotating rod (10), two groups of fixed blocks (14) are fixedly mounted on the rear wall of the first support rod (8), a worm (15) is rotatably mounted on the fixed block (14) via a bearing, the worm (15) and the worm wheel (13) are meshed with each other, and an angle adjustment knob (16) is welded on one side of the worm (15).

2. A lens positioning mechanism for measuring and verifying trial lens boxes according to claim 1, characterized in that: A second support rod (17) is welded to the second sliding block (7), and a second clamping plate (18) is rotatably mounted on the second support rod (17) via a bearing.

3. The lens positioning mechanism for measuring and verifying trial lens boxes according to claim 1, characterized in that: The first clamping plate (9) and the second clamping plate (18) are symmetrically arranged, and rubber pads (19) are installed on both the first clamping plate (9) and the second clamping plate (18).

4. A lens positioning mechanism for measuring and verifying trial lens boxes according to claim 1, characterized in that: The base (1) is provided with a movable groove (20), a second screw rod (21) is rotatably mounted on the inner wall of the movable groove (20) via a bearing, and a fine-tuning knob (22) is welded to one side of the second screw rod (21).

5. A lens positioning mechanism for measuring and verifying trial lens boxes according to claim 4, characterized in that: A moving block (23) is installed in the moving groove (20), and the moving block (23) is sleeved on the outer periphery of the second screw rod (21).

6. A lens positioning mechanism for measuring and verifying trial lens boxes according to claim 5, characterized in that: The moving block (23) slides in cooperation with the second screw rod (21) via a thread, and the top side of the moving block (23) is fixedly connected to the support plate (2).

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