A lens diameter measuring mechanism

Abstract

This utility model relates to a lens diameter measuring mechanism, which includes a worktable. Vertically mounted limiting rollers are arranged on the worktable, and these rollers are rotatably mounted on the worktable via a rotating rod. A lens is clamped between two limiting rollers. The axes of the limiting rollers are vertically aligned, while the axis of the lens is horizontally aligned. A contact sensor is vertically mounted above the worktable and can descend to contact the apex of the lens. This application improves the accuracy of lens diameter measurement.

Description

Technical Field

[0001] This utility model relates to the field of lens measurement, and in particular to a lens diameter measuring mechanism. Background Technology

[0002] When measuring the diameter of a lens, the lens is placed flat on a worktable. Usually, a camera takes a picture and transmits the image to a data center in the background. The diameter of the lens is calculated based on the ratio of the image to the actual object. However, the inventor believes that the above measurement method is not accurate and that a lens diameter measuring mechanism with higher measurement accuracy is needed. Utility Model Content

[0003] To address the aforementioned technical problems, this application provides a lens diameter measuring mechanism.

[0004] The lens diameter measuring mechanism provided in this application adopts the following technical solution:

[0005] A lens diameter measuring mechanism includes a worktable with vertically arranged limit rollers on the worktable. The limit rollers are rotatably mounted on the worktable via a rotating rod. A lens is clamped between two limit rollers. The axis of the limit rollers is vertically arranged, and the axis of the lens is horizontally arranged. A contact sensor is raised and lowered above the worktable and can descend to contact the apex of the lens.

[0006] Preferably, the workbench is provided with a mounting frame, and the mounting frame is provided with a lifting mechanism for driving the contact sensor to rise and fall.

[0007] Preferably, the lifting mechanism includes a first lifting module and a second lifting module arranged vertically. The first lifting module includes a first outer frame, a first motor, a first lead screw, a first slide, and a guide plate. The first outer frame is fixedly installed on the mounting bracket. The first motor is installed on the top of the first outer frame. The first lead screw is rotatably disposed inside the first outer frame. The output shaft of the first motor is coaxially connected to the first lead screw. The first lead screw passes through the first slide and is threadedly connected to the first slide. The two ends of the guide plate are fixedly connected to the two ends of the first outer frame. The guide plate passes through the first slide and is slidably connected to the first slide.

[0008] Preferably, the second lifting module includes a second outer frame, a second motor, a second lead screw, a second slide, and a guide rod. The second outer frame is fixedly mounted on the first slide. The second motor is mounted on the top of the second outer frame. The second lead screw is rotatably disposed inside the second outer frame. The output shaft of the second motor is coaxially connected to the second lead screw. The second lead screw passes through the second slide and is threadedly connected to the second slide. The guide rod is fixedly mounted on the second outer frame. A lifting plate is fixedly connected to the second slide. A guide block is fixedly connected to the side of the lifting plate near the second slide. The guide block has a guide groove that mates with the guide rod. The guide block moves up and down along the guide rod. The contact sensor is mounted below the lifting plate.

[0009] Preferably, an auxiliary frame is provided below the second slide. The auxiliary frame is L-shaped, with its vertical part fixed to the bottom of the second slide. The horizontal part of the auxiliary frame is located below the contact sensor, and an auxiliary hole is provided on the horizontal part of the auxiliary frame for the contact end of the contact sensor to pass through.

[0010] Preferably, a laser distance sensor is provided on the horizontal part of the auxiliary frame, and the laser emitting end of the laser distance sensor is aligned with the worktable.

[0011] In summary, this application includes the following beneficial technical effects: by directly contacting the lens apex with the contact sensor, the measurement accuracy of the lens diameter is improved. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a lens diameter measuring mechanism in an embodiment of this application.

[0013] Figure 2 This is a three-dimensional structural schematic diagram of the lens diameter measuring mechanism from a top view in an embodiment of this application.

[0014] Figure 3 This is a cross-sectional structural diagram used to illustrate the auxiliary hole in an embodiment of this application.

[0015] Explanation of reference numerals in the attached drawings: 1. Lens; 2. Worktable; 21. Mounting frame; 3. Limiting roller; 4. Contact sensor; 41. Contact end; 5. First lifting module; 51. First outer frame; 52. First motor; 53. First lead screw; 54. First slide; 55. Guide plate; 6. Second lifting module; 61. Second outer frame; 62. Second motor; 63. Second lead screw; 64. Second slide; 65. Guide rod; 66. Guide block; 7. Lifting plate; 8. Auxiliary frame; 81. Auxiliary hole; 9. Laser distance sensor. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-3This application will be described in further detail.

[0017] This application discloses a lens diameter measuring mechanism.

[0018] Reference Figure 1-3 The lens diameter measuring mechanism includes a worktable 2, on which a vertically mounted limiting roller 3 is installed. The limiting roller 3 is rotatably mounted on the worktable 2 via a rotating rod. The lens 1 is clamped between two limiting rollers 3. The axis of the limiting roller 3 is vertically mounted, and the axis of the lens 1 is horizontally mounted. A contact sensor 4 is mounted on the upper part of the worktable 2 and can be lowered to contact the apex of the lens 1.

[0019] The workbench 2 is equipped with a mounting frame 21, and the mounting frame 21 is equipped with a lifting mechanism for driving the contact sensor 4 to rise and fall.

[0020] The lifting mechanism includes a first lifting module 5 and a second lifting module 6 arranged vertically. The first lifting module 5 includes a first outer frame 51, a first motor 52, a first lead screw 53, a first slide 54, and a guide plate 55. The first outer frame 51 is fixedly installed on the mounting bracket 21. The first motor 52 is installed on the top of the first outer frame 51. The first lead screw 53 is rotatably disposed inside the first outer frame 51. The output shaft of the first motor 52 is coaxially connected with the first lead screw 53. The first lead screw 53 passes through the first slide 54 and is threadedly connected to the first slide 54. The two ends of the guide plate 55 are fixedly connected to the two ends of the first outer frame 51. The guide plate 55 passes through the first slide 54 and is slidably connected to the first slide 54.

[0021] The second lifting module 6 includes a second outer frame 61, a second motor 62, a second lead screw 63, a second slide 64, and a guide rod 65. The second outer frame 61 is fixedly installed on the first slide 54. The second motor 62 is installed on the top of the second outer frame 61. The second lead screw 63 is rotatably disposed inside the second outer frame 61. The output shaft of the second motor 62 is coaxially connected to the second lead screw 63. The second lead screw 63 passes through the second slide 64 and is threadedly connected to the second slide 64. The guide rod 65 is fixedly installed on the second outer frame 61. A lifting plate 7 is fixedly connected to the second slide 64. A guide block 66 is fixedly connected to the side of the lifting plate 7 near the second slide 64. The guide block 66 has a guide groove that cooperates with the guide rod 65. The guide block 66 moves up and down along the guide rod 65. The contact sensor 4 is installed below the lifting plate 7.

[0022] The second motor 62 has a higher accuracy than the first motor 52, and the second slide 64 has a shorter stroke than the first slide 54. During measurement, the first motor 52 is started first to drive the first slide 54 to descend. After descending a certain distance (set by the PLC control system), the bottom of the contact end 41 of the contact sensor 4 approaches the vertex of the lens 1. Then, the second motor 62 is started to drive the second slide 64 to descend, so that the contact end 41 of the contact sensor 4 contacts the vertex of the lens 1. When the contact sensor 4 contacts the vertex of the lens 1...

[0023] An auxiliary frame 8 is provided below the second slide table 64. The auxiliary frame 8 is L-shaped. The vertical part of the auxiliary frame 8 is fixed to the bottom of the second slide table 64. The horizontal part of the auxiliary frame 8 is located below the contact sensor 4. An auxiliary hole 81 is provided on the horizontal part of the auxiliary frame 8 for the contact end 41 of the contact sensor 4 to pass through. The inner diameter of the auxiliary hole 81 is slightly larger than the outer diameter of the contact end 41 of the contact sensor 4. This limits and guides the contact end 41 of the contact sensor 4, reduces the skewness of the contact sensor 4 during the lifting and lowering process, and further improves the measurement accuracy.

[0024] A laser distance sensor 9 is installed on the horizontal part of the auxiliary frame 8. The laser distance sensor 9 is vertically installed, and the laser emitting end of the laser distance sensor 9 is aligned with the worktable 2 to detect the distance between the laser distance sensor 9 and the top surface of the worktable 2.

[0025] Before measuring lens 1, first record the distance between the laser distance sensor 9 and the top surface of the worktable 2 as s1. During measurement, place lens 1 between the two limiting rollers 3, and then lower the contact sensor 4 through the lifting mechanism. When the contact sensor 4 lowers to the point where its contact end 41 contacts the vertex of lens 1, record the distance between the laser distance sensor 9 and the top surface of the worktable 2 as s1. The diameter of lens 1 is d, where d = s1 - s2, thus obtaining the accurate diameter of lens 1.

[0026] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lens diameter measuring mechanism characterized by: The system includes a worktable (2), on which a vertically mounted limiting roller (3) is provided. The limiting roller (3) is rotatably mounted on the worktable (2) via a rotating rod. The lens (1) is sandwiched between two limiting rollers (3). The axis of the limiting roller (3) is vertically mounted, and the axis of the lens (1) is horizontally mounted. A contact sensor (4) is mounted above the worktable (2) and can descend to contact the apex of the lens (1).

2. The lens diameter measuring mechanism according to claim 1, characterized in that: The workbench (2) is provided with a mounting frame (21), and the mounting frame (21) is provided with a lifting mechanism for driving the contact sensor (4) to rise and fall.

3. The lens diameter measuring mechanism of claim 2, wherein: The lifting mechanism includes a first lifting module (5) and a second lifting module (6) arranged vertically. The first lifting module (5) includes a first outer frame (51), a first motor (52), a first lead screw (53), a first slide (54), and a guide plate (55). The first outer frame (51) is fixedly installed on the mounting bracket (21). The first motor (52) is installed on the top of the first outer frame (51). The first lead screw (53) is rotatably disposed inside the first outer frame (51). The output shaft of the first motor (52) is coaxially connected with the first lead screw (53). The first lead screw (53) passes through the first slide (54) and is threadedly connected to the first slide (54). The two ends of the guide plate (55) are fixedly connected to the two ends of the first outer frame (51). The guide plate (55) passes through the first slide (54) and is slidably connected to the first slide (54).

4. The lens diameter measuring mechanism of claim 3, wherein: The second lifting module (6) includes a second outer frame (61), a second motor (62), a second lead screw (63), a second slide (64), and a guide rod (65). The second outer frame (61) is fixedly installed on the first slide (54). The second motor (62) is installed on the top of the second outer frame (61). The second lead screw (63) is rotatably disposed inside the second outer frame (61). The output shaft of the second motor (62) is coaxially connected to the second lead screw (63). The second lead screw (63) passes through the second slide. The platform (64) is threadedly connected to the second slide (64). The guide rod (65) is fixed on the second outer frame (61). A lifting plate (7) is fixedly connected on the second slide (64). A guide block (66) is fixedly connected on the side of the lifting plate (7) near the second slide (64). A guide groove that cooperates with the guide rod (65) is opened on the guide block (66). The guide block (66) moves up and down along the guide rod (65). The contact sensor (4) is installed below the lifting plate (7).

5. The lens diameter measuring mechanism according to claim 4, characterized in that: An auxiliary frame (8) is provided below the second slide (64). The auxiliary frame (8) is L-shaped. The vertical part of the auxiliary frame (8) is fixed to the bottom of the second slide (64). The horizontal part of the auxiliary frame (8) is located below the contact sensor (4). An auxiliary hole (81) is provided on the horizontal part of the auxiliary frame (8) for the contact end (41) of the contact sensor (4) to pass through.

6. The lens diameter measuring mechanism according to claim 5, characterized in that: A laser distance sensor (9) is provided on the horizontal part of the auxiliary frame (8), and the laser emitting end of the laser distance sensor (9) is aligned with the worktable (2).

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