Centering correction mechanism for polaroid visual inspection

Abstract

The utility model discloses a centering correction mechanism for polaroid visual inspection, which belongs to the technical field of optical piece detection and comprises a conveyor belt and fixing plates, a visual inspection machine group is arranged above the conveyor belt, the fixing plates are arranged at one end of the conveyor belt, grooves are formed in the fixing plates in a penetrating manner, and the visual inspection machine group is arranged in the grooves. And connecting rods are slidably connected into the grooves correspondingly, and push plates are fixedly connected to the connecting rods correspondingly. The pushing plate is driven to generate inward pushing force on the polaroid from the periphery, it is ensured that the polaroid is kept at the stable position, the visual detection system can capture clearer and unbiased images, detection errors caused by position deviation or inclination are reduced, and the detection accuracy and reliability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical component detection, in particular to a centering correction mechanism for visual detection of polarizers. Background Art

[0002] Polarizers are optical components made of special materials that allow light to pass only in a specific direction, thereby controlling and regulating light. They are key components in display devices such as liquid crystal displays (LCDs) and have a crucial impact on display quality. Due to their crucial role in display devices, their quality directly impacts the display quality and lifespan of the product. Therefore, rigorous visual inspection of polarizers to ensure that their performance indicators meet design requirements is crucial for ensuring product quality.

[0003] When inspecting polarizers, a mechanical suction cup is needed to load the polarizer, place it on a conveyor belt, and transport it to the bottom of the visual inspection machine group for inspection. Since the mechanical suction cup will generate a certain amount of vibration during operation, the position of the polarizer to be loaded will be offset. In addition, when the polarizer contacts, separates, or is rubbed with other objects, static electricity may be generated. The accumulation of static electricity may cause the surface of the polarizer to be charged, resulting in a slight displacement between adjacent polarizers. The position offset of the polarizer will directly affect the recognition accuracy of the visual inspection system. If the polarizer has shifted before being transported to the inspection position, the inspection system may not be able to accurately capture its true position or shape, resulting in increased errors in the inspection results. Such errors may include inaccurate dimensional measurement, missed defect identification, or false alarms, thereby affecting the assessment of product quality. Utility Model Content

[0004] The purpose of the present utility model is to provide a centering correction mechanism for visual inspection of polarizers to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A centering correction mechanism for polarizer visual inspection, comprising:

[0007] A conveyor belt, with a visual inspection machine group arranged above the conveyor belt;

[0008] A fixed plate is provided at one end of the conveyor belt. A groove is provided on the fixed plate. Connecting rods are slidably connected in the grooves. Push plates are fixedly connected to the connecting rods.

[0009] Preferably, the grooves are distributed in a circular array with the center of the fixed plate as the origin, and the push plates match the positions of the grooves.

[0010] Preferably, a driving shaft is provided at the bottom of the fixing plate, the driving shaft is rotatably connected to the fixing plate, and the driving shaft is externally connected to an external drive.

[0011] Preferably, a four-claw disc is fixedly connected to the outer surface of the drive shaft, and a sliding groove is provided through the ends of the four-claw disc.

[0012] Preferably, a fixed block is provided at the bottom of the fixed plate corresponding to the groove, a sliding rod is slidably connected to the middle of the fixed block, a sleeve is provided on the outer surface of the sliding rod, a plurality of rings are fixedly connected to the outer surface of the sliding rod, and the sleeve is connected to the sliding rod through the ring.

[0013] Preferably, a protrusion is fixedly connected to the sleeve at the end of the sliding rod, and the protrusion slides in a sliding groove formed through the four-claw disk.

[0014] Preferably, one end of the sliding rod away from the protrusion is fixedly connected to a connecting block.

[0015] Preferably, the tops of the connection blocks are fixedly connected to the connection rods.

[0016] Preferably, the connecting rods all start from the connecting block and pass through the groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By driving the push plate to generate an inward thrust on the polarizer on all sides, ensuring that the polarizer maintains a stable position, the visual inspection system can capture clearer and unbiased images, reducing detection errors caused by position offset or tilt, and improving the accuracy and reliability of detection. Polarizers with inaccurate positions may cause the visual inspection system to misjudge or miss defects. By ensuring that the polarizer is in the correct position before inspection, the risk of false detection and missed detection can be reduced, and the overall inspection quality can be improved.

[0019] By adjusting the rotation angle of the drive shaft, the push plate can adapt to the centering alignment operation of polarizers of different sizes, increasing the flexibility of equipment use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 For the utility model Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 3 This is a schematic diagram of the bottom structure of the fixed plate of the utility model;

[0024] Figure 4 This is a structural diagram of the utility model after removing the fixing plate.

[0025] Explanation of the figure numbers: 1. Conveyor belt; 101. Visual inspection machine group; 2. Fixed plate; 201. Groove; 203. Push plate; 3. Drive shaft; 301. Four-claw disc; 302. Slide groove; 303. Fixed block; 304. Sliding rod; 3041. Sleeve; 3042. Ring; 305. Protrusion; 306. Connecting block; 307. Connecting rod. DETAILED DESCRIPTION

[0026] The present invention is described in further detail below with reference to the accompanying drawings.

[0027] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0028] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positions are based on the directions or positional relationships shown in the accompanying drawings, which are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0029] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity. Example

[0030] See also Figure 1-Figure 4A centering correction mechanism for visual inspection of polarizers includes: a conveyor belt 1 and a fixed plate 2, a visual inspection machine group 101 is arranged above the conveyor belt 1; the fixed plate 2 is arranged at one end of the conveyor belt 1, and a groove 201 is penetrated on the fixed plate 2, and a connecting rod 307 is slidably connected in the groove 201, and a push plate 203 is fixedly connected to the connecting rod 307, wherein a cylinder-driven mechanical suction cup is installed above the conveyor belt 1, which is used to grab and load the polarizer and place it on the conveyor belt 1, and then be inspected by the visual inspection machine group 101.

[0031] It should be noted that, by synchronously pushing the push plate 203 toward the center of the fixed plate 2, the polarizer placed in the center of the fixed plate 2 can generate uniform thrust toward the center on all sides, so that the polarizer maintains the correct position before loading. When the polarizer is pushed toward the center of the fixed plate 2 evenly and stably and maintained in the correct position, the visual inspection system can capture clearer and unbiased images, reduce detection errors caused by position offset or tilt, and improve the accuracy and reliability of detection. Polarizers in inaccurate positions may cause the visual inspection system to misjudge or miss defects. By ensuring that the polarizer is in the correct position before detection, the risk of false detection and missed detection can be reduced, and the overall detection quality can be improved.

[0032] Furthermore, the grooves 201 are arranged in a circular array with the center of the fixed plate 2 as the origin, and the push plates 203 are positioned in alignment with the grooves 201. The push plates 203 arranged in an array around the polarizer push the polarizer around, avoiding direct contact with the surface of the polarizer and thus preventing damage to the polarizer. At the same time, the thrust is evenly distributed around the polarizer.

[0033] A drive shaft 3 is mounted at the bottom of the fixed plate 2, rotatably connected to the fixed plate 2 and externally connected to an external drive. A four-claw disc 301 is fixedly connected to the outer surface of the drive shaft 3, and each end of the four-claw disc 301 has a slot 302 extending through it. Activating the drive shaft 3 causes the four-claw disc 301 to rotate about the axis of the drive shaft 3. The external driving force can adjust the rotation angle and direction of the drive shaft 3, resulting in a fast adjustment response and ease of use.

[0034] Furthermore, a fixed block 303 is provided at the bottom of the fixed plate 2 corresponding to the groove 201, and a sliding rod 304 is slidably connected to the middle of the fixed block 303. A protrusion 305 is fixedly connected to the sleeve 3041 at the end of the sliding rod 304, and the protrusion 305 slides in the slide groove 302 that is opened through the four-claw plate 301. A connecting block 306 is fixedly connected to the end of the sliding rod 304 away from the protrusion 305. The top of the connecting block 306 is fixedly connected to the connecting rod 307. The connecting rods 307 all take the connecting block 306 as the starting point and pass through the groove 201. After starting the drive shaft 3, the limiting effect of the slide groove 302 drives the protrusion 305 to pull the sliding rod 304, and then the connecting block 306 synchronously drives the push plate 203 on the connecting rod 307 to generate thrust on all sides, avoiding the waste of resources caused by using multiple drives.

[0035] It should be noted that a sleeve 3041 is provided on the outer surface of the sliding rod 304, and a number of rings 3042 are fixedly connected to the outer surface of the sliding rod 304. The sleeve 3041 is connected to the sliding rod 304 through the rings 3042. By adjusting the position of the sleeve 3041 and engaging it with the rings 3042 on the outer surface of the sliding rod 304, the sleeve 3041 at the bottom of the sliding rod 304 can be adjusted to different positions, so that it can adapt to the centering operation of polarizers of different sizes, thereby increasing the flexibility of the equipment.

[0036] Through all the above embodiments, the working principle of the utility model is:

[0037] During use, the polarizer is placed within the area enclosed by the push plate 203, i.e., the center of the fixed plate 2. The external drive of the drive shaft 3 is then activated, causing the drive shaft 3 to begin rotating. The four-claw disc 301 then rotates synchronously. The four-claw disc 301 is restricted by the chute 302, prompting the protrusion 305 to pull the sliding rod 304 to slide horizontally. This in turn causes the connecting block 306 at the end of the sliding rod 304 to drive the connecting rod 307 to slide horizontally within the groove 201. This causes the push plate 203 to exert a thrust on the polarizer, keeping it centered and preventing displacement caused by vibration or static electricity generated by the mechanical suction cup. A stable polarizer position is essential for visual inspection accuracy. The push plate 203 allows the polarizer to remain fixed during inspection, reducing detection errors caused by positional fluctuations and improving inspection stability. When the polarizer is displaced due to vibration or static electricity, additional time may be required to adjust it before inspection to ensure it is in the correct position. The design of the push plate 203 reduces the need for such adjustments and improves inspection efficiency. Furthermore, by adjusting the rotation angle of the drive shaft 3, the push plate 203 can be adapted for centering alignment operations of polarizers of different sizes, thereby increasing the applicability of the device and improving the efficiency and flexibility of the detection process.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0039] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. A centering correction mechanism for polarizer visual inspection, characterized in that: include: A conveyor belt (1), wherein a visual inspection machine group (101) is provided above the conveyor belt (1); A fixed plate (2), the fixed plate (2) being arranged at one end of the conveyor belt (1), the fixed plate (2) being provided with a groove (201) extending therethrough, a connecting rod (307) being slidably connected in the groove (201), and a push plate (203) being fixedly connected to the connecting rod (307).

2. The centering correction mechanism for polarizer visual inspection according to claim 1, characterized in that: The grooves (201) are distributed in a circular array with the center of the fixed plate (2) as the origin, and the push plate (203) matches the position of the grooves (201).

3. The centering correction mechanism for polarizer visual inspection according to claim 2, characterized in that: A driving shaft (3) is provided at the bottom of the fixed plate (2), the driving shaft (3) is rotatably connected to the fixed plate (2), and the driving shaft (3) is externally connected to an external drive.

4. The centering correction mechanism for polarizer visual inspection according to claim 3, characterized in that: A four-claw disc (301) is fixedly connected to the outer surface of the drive shaft (3), and sliding grooves (302) are provided through the ends of the four-claw disc (301).

5. The centering correction mechanism for polarizer visual inspection according to claim 4, characterized in that: A fixing block (303) is provided at the bottom of the fixing plate (2) corresponding to the groove (201); a sliding rod (304) is slidably connected to the middle of the fixing block (303); a sleeve (3041) is provided on the outer surface of the sliding rod (304); a plurality of ferrules (3042) are fixedly connected to the outer surface of the sliding rod (304); and the sleeve (3041) is connected to the sliding rod (304) via the ferrule (3042).

6. The centering correction mechanism for polarizer visual inspection according to claim 5, characterized in that: A protrusion (305) is fixedly connected to the sleeve (3041) at the end of the sliding rod (304), and the protrusion (305) slides in a sliding groove (302) formed through the four-claw plate (301).

7. The centering correction mechanism for polarizer visual inspection according to claim 6, characterized in that: One end of the sliding rod (304) away from the protrusion (305) is fixedly connected to a connecting block (306).

8. The centering correction mechanism for polarizer visual inspection according to claim 7, characterized in that: The tops of the connection blocks (306) are fixedly connected to the connection rods (307).

9. The centering correction mechanism for polarizer visual inspection according to claim 8, characterized in that: The connecting rods (307) all start from the connecting block (306) and pass through the groove (201).

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