A hardness testing device for polarizers

Abstract

This utility model provides a hardness testing device for polarizers, relating to the field of hardness testing technology. The device includes: a base, a support arm, a two-axis linear drive module, a clamping assembly, a cylinder, and a hardness testing probe. The support arm is connected to the base, and one end of the support arm away from the base is connected to the two-axis linear drive module. The cylinder is mounted on the two-axis linear drive module, and its output end is connected to the hardness testing probe to drive it closer to the polarizer. The clamping assembly is connected to the base and clamps the polarizer. By coordinating the clamping assembly with the two-axis linear drive module, stable clamping of a circular polarizer and accurate hardness testing at multiple locations can be achieved, overcoming the limitation of existing technologies that can only test a single point on the polarizer, significantly improving the comprehensiveness and accuracy of the testing.

Description

Technical Field

[0001] This utility model relates to the field of hardness testing technology, specifically to a hardness testing device for polarizers. Background Technology

[0002] In the testing of optical components, the hardness of polarizers is one of the important indicators for evaluating their physical properties and processing quality. Polarizers are widely used in optical instruments, liquid crystal displays, photographic equipment, and many other fields. Among them, circular polarizers are widely used in various optical devices due to their symmetrical structure and ease of installation and adjustment. In practical applications, to ensure that polarizers have good wear resistance and mechanical stability during use, it is usually necessary to test their surface hardness.

[0003] Currently, hardness testing of polarizers mainly relies on traditional hardness testers, which obtain hardness data by pressing a test probe into the surface of the polarizer. In the prior art, utility model patent publication number "CN215768080U" discloses a polarizer hardness testing device. This type of device has a fixed hardness test probe position, which cannot be flexibly adjusted, and can only perform hardness testing at a single point on the polarizer surface, making it difficult to comprehensively reflect the hardness distribution of the entire polarizer. Especially when testing circular polarizers, due to their structural characteristics, single-point testing may not accurately assess the hardness difference between the edge and center areas, affecting the comprehensiveness and accuracy of the test results. Utility Model Content

[0004] According to an embodiment of the present invention, a hardness testing device for polarizers is provided to solve the problems mentioned in the background art.

[0005] In a first aspect, this invention provides a hardness testing device for polarizers.

[0006] The hardness testing device for polarizers includes: a base, a support arm, a two-axis linear drive module, a clamping assembly, a cylinder, and a hardness testing probe; the support arm is connected to the base, and one end of the support arm away from the base is connected to the two-axis linear drive module; the cylinder is mounted on the two-axis linear drive module, and the output end of the cylinder is connected to the hardness testing probe to drive the hardness testing probe closer to the polarizer; the clamping assembly is connected to the base to clamp the polarizer.

[0007] Preferably, the two-axis linear drive module includes a first linear drive module and a second linear drive module;

[0008] The first linear drive module includes a first mounting plate, a first lead screw, two first guide rails, a first motor, and a first movable plate; the first mounting plate is fixedly connected to the support arm, the first lead screw is rotatably connected to the first mounting plate, the two first guide rails are fixedly connected to the first mounting plate, the first movable plate is slidably connected to the two first guide rails, the first lead screw is threadedly connected to the first movable plate, and the first lead screw is connected to the output end of the first motor.

[0009] The second linear drive module includes a second mounting plate, a second lead screw, two second guide rails, a second motor, and a second movable plate. The second mounting plate is fixedly connected to the first movable plate, the two second guide rails are fixedly connected to the second mounting plate, the second lead screw is rotatably connected to the second mounting plate, the second movable plate is slidably connected to the two second guide rails, the second lead screw is threadedly connected to the second movable plate, and the output end of the second motor is connected to the second lead screw.

[0010] Preferably, the second movable plate is provided with a connecting plate, and the cylinder is connected to the connecting plate.

[0011] Preferably, the clamping assembly includes a housing, a drive disk, a drive component, three clamping blocks, and a cover plate; the housing is mounted on the upper surface of the base, the drive disk is rotatably mounted inside the housing, the drive disk is provided with helical teeth, the cover plate is connected to the housing, the three clamping blocks are slidably connected to the cover plate, the lower surfaces of the three clamping blocks are provided with transmission teeth that mesh with the helical teeth, and the drive component is mounted inside the housing for driving the drive disk to rotate.

[0012] Preferably, the drive assembly includes a rotating shaft, a worm gear, and a worm. The rotating shaft is rotatably mounted in the housing and fixedly connected to the drive disk. The worm gear is sleeved on the rotating shaft. The worm is meshed with the worm gear and rotatably connected to the side wall of the housing.

[0013] Preferably, the cover plate has a notch, and the clamping block is slidably connected to the notch.

[0014] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0015] This utility model provides a hardness testing device for polarizers. By setting up a clamping component and a two-axis linear drive module, it can achieve stable clamping of circular polarizers and accurate hardness testing at multiple positions. This overcomes the problem that existing technologies can only test a single point on the polarizer, and significantly improves the comprehensiveness of the test and the accuracy of the data.

[0016] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0017] The above and other features, advantages, and aspects of the various embodiments of the present invention will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0018] Figure 1 A three-dimensional structural schematic diagram of a hardness testing device for polarizers according to an embodiment of the present invention is shown.

[0019] Figure 2 A three-dimensional structural schematic diagram of a two-axis linear drive module for a hardness testing device for polarizers according to an embodiment of the present invention is shown.

[0020] Figure 3 A three-dimensional structural schematic diagram of the first linear drive module of a hardness testing device for polarizers according to an embodiment of the present invention is shown.

[0021] Figure 4 An exploded view of the clamping assembly of a hardness testing device for polarizers according to an embodiment of the present invention is shown.

[0022] Figure 5 A three-dimensional structural schematic diagram of a drive assembly for a hardness testing device for a polarizer according to an embodiment of the present invention is shown.

[0023] Explanation of reference numerals in the attached figures

[0024] 1-Base, 2-Support arm, 3-Two-axis linear drive module, 31-First linear drive module, 311-First mounting plate, 312-First lead screw, 313-First guide rail, 314-First motor, 315-First moving plate, 32-Second linear drive module, 321-Second mounting plate, 322-Second lead screw, 323-Second guide rail, 324-Second motor, 325-Second moving plate, 326-Connecting plate, 4-Clamping assembly, 41-Housing, 42-Drive disk, 421-Helical gear, 43-Drive assembly, 431-Rotating shaft, 432-Worm wheel, 433-Worm, 44-Clamping block, 441-Transmission gear, 45-Cover plate, 451-Notch, 5-Cylinder, 6-Hardness test needle. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0027] like Figures 1 to 5 As shown, a hardness testing device for polarizers includes: a base 1, a support arm 2, a two-axis linear drive module 3, a clamping assembly 4, a cylinder 5, and a hardness testing probe 6. The base 1 is the load-bearing structure of the device, used to support and fix other components, providing a stable working platform. One end of the support arm 2 is fixedly connected to the base 1, and the other end is connected to the two-axis linear drive module 3. The support arm 2 serves a connecting and load-bearing function, allowing the two-axis linear drive module 3 to be arranged in a suitable position in space, with good stability and rigidity.

[0028] The two-axis linear drive module 3 includes a drive mechanism for horizontal and vertical movement. Through the cooperation of servo motors, slide rails, sliders, and other components, the cylinder 5 achieves precise movement in the X and Y axes, ensuring that the hardness testing needle 6 can cover multiple positions on the polarizer surface. The cylinder 5 is mounted on the moving platform of the two-axis linear drive module 3, with its output end pointing vertically downwards and connected to the hardness testing needle 6, enabling it to drive the hardness testing needle 6 up and down along the Z-axis. The hardness testing needle 6 is located at the output end of the cylinder 5, with its tip facing the polarizer surface fixed by the clamping assembly 4, and is used for indentation hardness testing of the polarizer surface.

[0029] The clamping assembly 4 is fixedly mounted on the base 1 to stably clamp the polarizer to be tested. The structure of the clamping assembly 4 may include an up-down or left-right clamping mechanism to ensure that the polarizer is in a fixed position throughout the test, without shifting or shaking, thereby improving the repeatability and accuracy of the hardness test.

[0030] In practical use, the circular polarizer to be tested is first firmly clamped in a predetermined position by the clamping assembly 4 to ensure its stability. Then, the two-axis linear drive module 3 is operated to drive the cylinder 5 and its connected hardness testing needle 6 to move in the horizontal plane (XY direction), achieving precise adjustment of the position of the hardness testing needle 6, allowing the needle to be aligned with any target position on the polarizer surface. After adjustment, the cylinder 5 is activated, causing its output end to drive the hardness testing needle 6 downwards in the vertical direction (Z-axis), so that the tip of the hardness testing needle 6 contacts the polarizer surface and creates an indentation. By measuring the indentation depth or resistance, the hardness at that position is detected.

[0031] Because the two-axis linear drive module 3 has flexible spatial positioning capabilities, the hardness testing probe 6 can cover multiple test points on the polarizer, no longer limited to fixed single-point testing. This structural design enables the device to perform comprehensive and uniform hardness testing on multiple different locations of a circular polarizer, especially by comparing the central and edge areas of the polarizer separately, thereby obtaining more complete and objective hardness distribution data.

[0032] In this embodiment, the two-axis linear drive module 3 includes a first linear drive module 31 and a second linear drive module 32, which are used to realize the precise movement of the hardness test needle 6 in two orthogonal directions, thereby performing point-by-point detection on different positions on the polarizer surface.

[0033] The first linear drive module 31 includes a first mounting plate 311, a first lead screw 312, two first guide rails 313, a first motor 314, and a first moving plate 315. The first mounting plate 311 is fixedly connected to the support arm 2, serving as the mounting base for the module. The first lead screw 312 is arranged along a first direction, and its two ends are rotatably connected to the first mounting plate 311 via bearing assemblies, converting rotational motion into linear movement. The two first guide rails 313 are arranged in parallel and fixedly mounted on the first mounting plate 311, providing guidance and support to improve movement accuracy and stability. The first moving plate 315 is slidably connected to the two first guide rails 313, ensuring smooth linear movement in the first direction. The first moving plate 315 is also threadedly connected to the first lead screw 312, and the rotating lead screw drives its back-and-forth movement. The first motor 314 is fixed to one end of the first mounting plate 311, and its output end is connected to the first lead screw 312, driving the first lead screw 312 to rotate.

[0034] When the first motor 314 is started, its output shaft rotates, which in turn drives the first lead screw 312 to rotate around a fixed axis. Driven by the lead screw thread pair, the first moving plate 315 slides along the first guide rail 313, thereby achieving linear displacement in the first direction. Since the second linear drive module 32 is mounted on the first moving plate 315, the second linear drive module 32 moves synchronously with the first moving plate 315, achieving transmission linkage in the first direction.

[0035] The second linear drive module 32 is further used to realize movement adjustment in a second direction (orthogonal to the first direction), including a second mounting plate 321, a second lead screw 322, two second guide rails 323, a second motor 324, and a second moving plate 325. The second mounting plate 321 is fixedly mounted on the first moving plate 315, serving as the mounting base platform for the second module. The two second guide rails 323 are fixed to the second mounting plate 321, and the second moving plate 325 is slidably connected to the second guide rails 323 to limit their movement direction and ensure movement accuracy. The second lead screw 322 is rotatably mounted on the second mounting plate 321 via bearings, and the second moving plate 325 is threadedly connected to the lead screw; the rotating lead screw drives it to slide linearly. The second motor 324 is fixed to the second mounting plate 321, and its output end is connected to the second lead screw 322.

[0036] During operation, the second motor 324 is started, and the motor output shaft drives the second lead screw 322 to rotate. Through the threaded engagement between the lead screw and the moving plate, the second moving plate 325 is driven to slide along the second guide rail 323, achieving high-precision displacement adjustment in the second direction. The second moving plate 325 is fixedly connected to the cylinder 5, so its movement will directly drive the cylinder 5 and its connected hardness testing needle 6 to move synchronously.

[0037] In summary, the first linear drive module 31 drives the first lead screw 312 via a motor, thereby enabling the second linear drive module 32 to move as a whole in the first direction, thus indirectly moving the hardness testing probe 6 in the first direction. Meanwhile, the second linear drive module 32 drives the second lead screw 322 via a second motor 324, directly moving the hardness testing probe 6 in the second direction. Through the coordinated operation of these two-stage linear drive structures, the position of the hardness testing probe 6 can be precisely controlled in a two-dimensional plane, enabling hardness testing at different points on the polarizer and improving the detection range and accuracy.

[0038] In this embodiment, a connecting plate 326 is provided on the second moving plate 325, and the cylinder 5 is connected to the connecting plate 326.

[0039] In this embodiment, the clamping assembly 4 is used to stably clamp the polarizer under test, preventing it from shifting or shaking during the testing process. The clamping assembly 4 includes a housing 41, a drive disk 42, a drive assembly 43, three clamping blocks 44, and a cover plate 45.

[0040] The housing 41 is mounted on the upper surface of the base 1 and serves to support and protect the clamping structure. The housing 41 is a hollow structure, and its interior houses the drive disk 42 and the drive assembly 43. The drive disk 42 is rotatably mounted inside the housing 41, and its circumference is provided with multiple helical teeth 421 for transmission. These helical teeth 421 are distributed in a helical shape, forming a meshing tooth groove structure for driving the movement of the clamping block 44.

[0041] The cover plate 45 is fixedly installed on the upper part of the housing 41 to cover and define the overall range of the clamping structure. The cover plate 45 has multiple notches 451, and three clamping blocks 44 are slidably connected to the cover plate 45 through the notches 451, allowing the clamping blocks 44 to reciprocate linearly in the radial direction within the plane of the cover plate. The lower surface of each clamping block 44 is provided with transmission teeth 441 corresponding to the helical teeth 421 on the drive disk 42. The two teeth mesh to convert the rotational motion of the drive disk into linear movement of the clamping block.

[0042] The drive assembly 43 is used to drive the drive disk 42 to rotate, thereby realizing the synchronous retraction and release of the clamping block 44. The drive assembly 43 includes a rotating shaft 431, a worm gear 432, and a worm 433. The rotating shaft 431 is axially rotatable and installed inside the housing 41, with its lower end fixedly connected to the drive disk 42, serving as a transmission output shaft. The worm gear 432 is sleeved in the middle of the rotating shaft 431 and rotates coaxially with it. The worm 433 is disposed on the side wall of the housing 41 and is rotatably installed, with its axis perpendicular to the worm gear 432, and meshes with the worm gear 432 for transmission.

[0043] In operation, the worm gear 433 is driven to rotate manually or by a motor. The worm gear 433, through its meshing with the worm wheel 432, drives the worm wheel to rotate, which in turn drives the rotating shaft 431 mounted on it to rotate. The rotating shaft 431 further drives the drive disc 42, which is fixedly connected to it, to rotate around its central axis. Since the helical teeth 421 of the drive disc 42 mesh with the transmission teeth 441 below the clamping blocks 44, when the drive disc rotates, the rotation of the helical teeth causes the transmission teeth to move radially, thereby driving the three clamping blocks 44 to move synchronously closer to or further away from the center, thus adjusting the clamping distance.

[0044] When the polarizer needs to be held, the operator places it within the central area enclosed by the three holding blocks 44. Then, by rotating the worm gear 433, the drive disk 42 rotates slowly, and the holding blocks 44, driven by the helical gear structure, gradually move closer to the center, ultimately forming a stable grip on the polarizer. Conversely, when the test is finished and the polarizer needs to be released, the worm gear 433 can be rotated in the opposite direction to move the holding blocks outwards, facilitating sample removal.

[0045] Through the above structural design, the clamping assembly 4 has the following advantages: First, the use of three symmetrically distributed clamping blocks can achieve balanced force clamping of the circular polarizer, avoiding warping or breakage; second, the meshing method of the helical teeth and transmission teeth can realize synchronous and equidistant movement of the clamping blocks, improving the coordination of the clamping action and the stability of the clamping effect; third, the worm gear-worm wheel-rotating shaft reduction transmission mechanism realizes high torque, low speed, and high precision drive control, avoiding excessively fast or violent movements during clamping, and enhancing the protection effect on the polarizer.

[0046] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A hardness testing device for polarizers, characterized in that, include: The assembly comprises a base (1), a support arm (2), a two-axis linear drive module (3), a clamping assembly (4), a cylinder (5), and a hardness test needle (6). The support arm (2) is connected to the base (1), and one end of the support arm (2) away from the base (1) is connected to the two-axis linear drive module (3). The cylinder (5) is mounted on the two-axis linear drive module (3), and the output end of the cylinder (5) is connected to the hardness test needle (6) to drive the hardness test needle (6) closer to the polarizer. The clamping assembly (4) is connected to the base (1) and is used to clamp the polarizer.

2. The hardness testing device for polarizers according to claim 1, characterized in that, The two-axis linear drive module (3) includes a first linear drive module (31) and a second linear drive module (32); The first linear drive module (31) includes a first mounting plate (311), a first lead screw (312), two first guide rails (313), a first motor (314), and a first moving plate (315); the first mounting plate (311) is fixedly connected to the support arm (2), the first lead screw (312) is rotatably connected to the first mounting plate (311), the two first guide rails (313) are fixedly connected to the first mounting plate (311), the first moving plate (315) is slidably connected to the two first guide rails (313), the first lead screw (312) is threadedly connected to the first moving plate (315), and the first lead screw (312) is connected to the output end of the first motor (314); The second linear drive module (32) includes a second mounting plate (321), a second lead screw (322), two second guide rails (323), a second motor (324), and a second moving plate (325); the second mounting plate (321) is fixedly connected to the first moving plate (315), the two second guide rails (323) are fixedly connected to the second mounting plate (321), the second lead screw (322) is rotatably connected to the second mounting plate (321), the second moving plate (325) is slidably connected to the two second guide rails (323), the second lead screw (322) is threadedly connected to the second moving plate (325), and the output end of the second motor (324) is connected to the second lead screw (322).

3. The hardness testing device for polarizers according to claim 2, characterized in that, The second movable plate (325) is provided with a connecting plate (326), and the cylinder (5) is connected to the connecting plate (326).

4. The hardness testing device for polarizers according to claim 1, characterized in that, The clamping assembly (4) includes a housing (41), a drive disk (42), a drive assembly (43), three clamping blocks (44), and a cover plate (45). The housing (41) is mounted on the upper surface of the base (1). The drive disk (42) is rotatably mounted inside the housing (41). The drive disk (42) is provided with helical teeth (421). The cover plate (45) is connected to the housing (41). The three clamping blocks (44) are slidably connected to the cover plate (45). The lower surface of the three clamping blocks (44) is provided with transmission teeth (441) that mesh with the helical teeth (421). The drive assembly (43) is mounted inside the housing (41) and is used to drive the drive disk (42) to rotate.

5. The hardness testing device for polarizers according to claim 4, characterized in that, The drive assembly (43) includes a rotating shaft (431), a worm gear (432), and a worm (433). The rotating shaft (431) is rotatably mounted in the housing (41) and fixedly connected to the drive disk (42). The worm gear (432) is sleeved on the rotating shaft (431). The worm (433) is meshed with the worm gear (432) and is rotatably connected to the side wall of the housing (41).

6. The hardness testing device for polarizers according to claim 4, characterized in that, The cover plate (45) has a notch (451), and the clamping block (44) is slidably connected to the notch (451).

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