Light guide plate uniformity detection mechanism

Abstract

The utility model discloses a light guide plate uniformity detection mechanism, which relates to the technical field of light guide plates and comprises a base, a detection base is fixedly mounted in the middle of the top end of the base, a support is fixedly connected to the rear portion of the top end of the base, and a detection light source is fixedly mounted at the bottom end of the front portion of the support. A positioning structure is fixedly installed in the middle of the top end of the base. According to the light guide plate uniformity detection mechanism of the utility model, through the effect of the positioning structure, the servo motor I is started, the bevel gear set is driven to work, the two screw rods are driven to rotate, the two rectangular blocks are made to slide inwards synchronously, the four round rods are driven to slide towards the direction of the detection base synchronously, and the uniformity of the light guide plate is detected. At the moment, under the guiding action of the inclined holes, the four corner plates synchronously slide towards the direction of the detection base, the rubber rollers make contact with the light guide plate, the extrusion effect is formed, then the positioning effect is achieved, and the accuracy of uniformity detection of the light guide plate by the detection light source is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of light guide plate technology, and in particular relates to a light guide plate uniformity detection mechanism. Background Technology

[0002] Light guide plate uniformity testing agencies are professional organizations that specialize in evaluating the light field uniformity of light guide plates. These agencies can accurately measure and evaluate the uniformity of light distribution under different conditions. Light guide plate uniformity testing agencies play an important role in ensuring the quality of light guide plate products and improving product performance.

[0003] For example, Chinese patent CN214334199U discloses a light guide plate uniformity detection mechanism, including a carrier plate, a light source assembly, and a pushing assembly. The light source assembly includes a mounting strip, a first guide plate, a second guide plate, a limiting block, and LED beads. The mounting strip is disposed on the carrier plate and has a receiving groove. The LED beads and the limiting block are respectively disposed on the bottom wall of the receiving groove. The first guide plate and the second guide plate are respectively disposed on the inner side wall of the receiving groove. The pushing assembly includes a pushing drive and a pushing block. The pushing drive is disposed on the carrier plate, and the pushing block is slidably disposed on the carrier plate. The pushing block is connected to the output shaft of the pushing drive. The pushing drive is used to drive the pushing block to slide on the carrier plate so that the pushing block pushes against one end of the light guide plate, thereby causing the other end of the light guide plate to abut against the limiting block between the first guide plate and the second guide plate, so that the light emitted by the LED beads can enter the light guide plate, thereby reliably detecting the uniformity of the light guide plate.

[0004] The existing technology has the following problems:

[0005] In actual use, operators need to spend a lot of time to ensure that the light guide plate is in the correct position during the detection process. This increases the preparation time before detection, thereby reducing the overall detection efficiency. At the same time, the light guide plate may move or shift during the detection process, which may affect the detection base's accurate grasp of the light field image, resulting in deviations in the detected light field uniformity data and reducing the accuracy of the detection results. Utility Model Content

[0006] This invention provides a light guide plate uniformity detection mechanism to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a light guide plate uniformity detection mechanism, including a base, a detection base fixedly installed at the middle of the top of the base, a bracket fixedly connected to the rear of the top of the base, a detection light source fixedly installed at the bottom of the front of the bracket, a positioning structure fixedly installed at the middle of the top of the base, and an auxiliary structure fixedly installed at the right side of the top of the base.

[0008] Preferably, the positioning structure includes a cavity formed inside the base. A servo motor is fixedly installed at the center of the bottom of the base. The output end of the servo motor extends into the cavity. A bevel gear set is fixedly installed at the output end of the servo motor. The bevel gear set includes three bevel gears. The bottom end of the bevel gear in the middle position is fixedly connected to the output end of the motor. A lead screw is fixedly connected to the far ends of the bevel gears on the left and right sides. The far ends of the two lead screws are rotatably connected to the left and right ends inside the cavity, respectively. A rectangular block is threaded onto the outer wall of each of the two lead screws. Round rods are fixedly connected to the front and rear sides of each of the two rectangular blocks. A slider is slidably connected to the outer wall of each of the four round rods. A support rod is fixedly connected to the top of each of the four sliders. The four support rods extend out of the top of the base. Four oblique holes penetrating the base are opened in the center of the top of the base. The inner walls of the four oblique holes are slidably connected to the outer walls of the tops of the four sliders, respectively.

[0009] Preferably, the top and bottom ends of the four support rods are rotatably connected to corner plates near the detection base, and the bottom ends of the four corner plates are rotatably connected to rubber rollers.

[0010] Preferably, a circular box is fixedly connected to the top and bottom of each of the four support rods near the detection base. A coil spring is fixedly connected to the inner wall of each of the four circular boxes. One end of each of the four coil springs near the axis of the circular box is fixedly connected to the outer wall of the top of the four corner plates. The four circular boxes are located outside the top of the four corner plates.

[0011] Preferably, the auxiliary structure includes a slide rail, the bottom end of which is fixedly connected to the left and right positions of the top of the base, and a placement plate is slidably connected to the middle of the slide rail, with a through hole in the middle of the placement plate.

[0012] Preferably, a second servo motor is fixedly installed on the right side of the slide rail. A cam plate is fixedly connected to the output end of the second servo motor. A traction rope is movably sleeved on the outer wall of the right side of the cam plate. The left end of the traction rope extends into the interior of the right side of the base. An elastic telescopic rod is fixedly connected to the left end of the traction rope. A top plate is fixedly connected to the output end of the elastic telescopic rod. The shape and size of the outer wall of the top plate are adapted to the shape and size of the inner wall of the through hole. A rotating rod is rotatably connected to the opposite surface of the lower right side of the base. The outer wall of the rotating rod overlaps with the outer wall of the traction rope.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] 1. This utility model provides a light guide plate uniformity detection mechanism. Through the action of the positioning structure, a servo motor is started, which drives the bevel gear set to work, which in turn drives the two lead screws to rotate, causing the two rectangular blocks to slide inward synchronously, which in turn drives the four round rods to slide inward synchronously towards the detection base. At this time, under the guidance of the inclined hole, the four corner plates slide inward synchronously towards the detection base. At this time, the rubber roller contacts the light guide plate and forms a squeezing effect, thereby achieving the positioning effect and ensuring the accuracy of the detection light source in detecting the uniformity of the light guide plate.

[0015] 2. This utility model provides a light guide plate uniformity detection mechanism. Through the function of the auxiliary structure, when the light guide plate is being tested for uniformity, the placement plate can be slid to one side to avoid affecting the detection base's detection of the light transmitted through the light guide plate. After the test is completed, the placement plate together with the light guide plate is slid to the bottom of the top plate. Under the action of the elastic telescopic rod, the top plate slides down, thereby lifting the light guide plate, which makes it easy to take out the light guide plate after the test is completed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the lead screw structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the coil spring structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the placement plate structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the rotating rod structure of this utility model.

[0021] In the diagram: 1. Base; 2. Detection base; 3. Bracket; 4. Detection light source; 5. Positioning structure; 51. Cavity; 52. Servo motor one; 53. Bevel gear set; 54. Lead screw; 55. Rectangular block; 56. Slider; 57. Round rod; 58. Support rod; 59. Round box; 510. Coil spring; 511. Angle plate; 512. Rubber roller; 6. Auxiliary structure; 61. Slide rail; 62. Placement plate; 63. Elastic telescopic rod; 64. Top plate; 65. Servo motor two; 66. Cam plate; 67. Traction rope; 68. Rotating rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0023] like Figure 1 As shown, a light guide plate uniformity detection mechanism includes a base 1, a detection base 2 fixedly installed at the middle of the top of the base 1, a bracket 3 fixedly connected to the rear of the top of the base 1, a detection light source 4 fixedly installed at the bottom of the front of the bracket 3, a positioning structure 5 fixedly installed at the middle of the top of the base 1, and an auxiliary structure 6 fixedly installed at the right side of the top of the base 1.

[0024] By setting the positioning structure 5, the servo motor 52 is started, which in turn drives the bevel gear set 53 to work, which in turn drives the two lead screws 54 to rotate, which in turn causes the two rectangular blocks 55 to slide inward synchronously, which in turn drives the four round rods 57 to slide inward synchronously towards the detection base 2. At this time, under the guidance of the inclined hole, the four corner plates 511 slide inward synchronously towards the detection base 2. At this time, the rubber roller 512 contacts the light guide plate and forms a squeezing effect, which achieves the positioning effect and ensures the accuracy of the uniformity detection of the light guide plate by the detection light source 4.

[0025] like Figure 2 and Figure 3 As shown, the positioning structure 5 includes a cavity 51, which is located inside the base 1. A servo motor 52 is fixedly installed at the center of the bottom of the base 1. The output end of the servo motor 52 extends into the cavity 51. A bevel gear set 53 is fixedly installed at the output end of the servo motor 52. The bevel gear set 53 includes three bevel gears. The bottom end of the bevel gear in the middle position is fixedly connected to the output end of the motor. The ends of the bevel gears on the left and right sides that are far apart are fixedly connected to lead screws 54. The ends of the two lead screws 54 that are far apart are rotatably connected to the left and right ends inside the cavity 51, respectively. The outer walls of the two lead screws 54 are threaded with rectangular blocks 55. The front and rear sides of the two rectangular blocks 55 are fixedly connected with round rods 57. The outer walls of the four round rods 57 are slidably connected with sliders 56. The tops of the four sliders 56 are fixedly connected with support rods 58. The four support rods 58 extend out of the top of the base 1. The center of the top of the base 1 has four oblique holes that penetrate the base 1. The inner walls of the four oblique holes are slidably connected to the outer walls of the tops of the four sliders 56, respectively.

[0026] By setting the lead screw 54, the servo motor 52 is started, which in turn drives the bevel gear set 53 to work, which in turn drives the two lead screws 54 to rotate, which in turn causes the two rectangular blocks 55 to slide inward synchronously, which in turn drives the four round rods 57 to slide inward synchronously towards the detection base 2. At this time, under the guidance of the inclined hole, the four corner plates 511 slide inward synchronously towards the detection base 2. At this time, the rubber roller 512 contacts the light guide plate and forms a squeezing effect.

[0027] like Figure 3 As shown, corner plates 511 are rotatably connected to the top and bottom of the four support rods 58 near the detection base 2, and rubber rollers 512 are rotatably connected to the bottom of the four corner plates 511.

[0028] By setting the rubber roller 512, the anti-slip fixing effect can be achieved under the action of the rubber roller 512, and the problem of hard clamping leading to the breakage of the light guide plate edge can be effectively avoided.

[0029] like Figure 2 and Figure 3 As shown, round boxes 59 are fixedly connected to the top and bottom of the four support rods 58 near the detection base 2. Coil springs 510 are fixedly connected to the inner walls of the four round boxes 59. One end of the four coil springs 510 near the axis of the round box 59 is fixedly connected to the outer wall of the top of the four corner plates 511. The four round boxes 59 are located outside the top of the four corner plates 511.

[0030] By setting the coil spring 510, during the positioning process of the light guide plate, the corner plate 511 can rotate to adjust the angle and position of the two rubber rollers 512 according to different sizes and shapes, thereby further improving the positioning effect. The coil spring 510 can keep the initial state of the two rubber rollers 512 as close to the light guide plate as possible. When clamping and positioning, the corner plate 511 only needs to rotate slightly to avoid the rubber rollers 512 from being misaligned during positioning, which would affect the positioning accuracy or even cause damage to the light guide plate.

[0031] like Figure 4 and Figure 5 As shown, the auxiliary structure 6 includes a slide rail 61. The bottom end of the slide rail 61 is fixedly connected to the left and right positions of the top of the base 1. A placement plate 62 is slidably connected to the middle of the slide rail 61. A through hole is opened in the middle of the placement plate 62.

[0032] By setting up the slide rail 61 and the placement plate 62, it is convenient to load and unload the light guide plate. At the same time, when the light guide plate is being tested for uniformity, the placement plate 62 can be slid to one side to avoid affecting the detection base 2's detection of the light transmitted through the light guide plate.

[0033] like Figure 5As shown, a servo motor 65 is fixedly installed on the right side of the slide rail 61. A cam plate 66 is fixedly connected to the output end of the servo motor 65. A traction rope 67 is movably sleeved on the outer wall of the right side of the cam plate 66. The left end of the traction rope 67 extends into the interior of the right side of the base 1. An elastic telescopic rod 63 is fixedly connected to the left end of the traction rope 67. A top plate 64 is fixedly connected to the output end of the elastic telescopic rod 63. The shape and size of the outer wall of the top plate 64 are adapted to the shape and size of the inner wall of the through hole. A rotating rod 68 is rotatably connected to the opposite surface of the lower right side of the base 1. The outer wall of the rotating rod 68 overlaps with the outer wall of the traction rope 67.

[0034] By setting the top plate 64, when the placement plate 62 is located directly below the top plate 64, the servo motor 65 is driven, which in turn drives the cam plate 66 to rotate, thereby releasing the traction rope 67. At this time, under the action of the elastic telescopic rod 63, the top plate 64 slides upward, thereby lifting the light guide plate, which makes it easier to take out the light guide plate after the test is completed.

[0035] The working principle of this utility model is as follows: In use, the light guide plate is placed on the placement plate 62, and then the placement plate 62 is slid between the detection base 2 and the detection light source 4. The servo motor 52 is started, which drives the bevel gear set 53 to work, thereby driving the two lead screws 54 to rotate. This causes the two rectangular blocks 55 to slide inwards synchronously, which in turn drives the four round rods 57 to slide synchronously towards the detection base 2. At this time, under the guidance of the oblique holes, the four corner plates 511 slide synchronously towards the detection base 2. The rubber rollers 512 then contact the light guide plate, creating a squeezing effect. Under the action of the rubber rollers 512, both anti-slip and fixing effects are achieved, effectively avoiding rigid clamping that could lead to breakage of the light guide plate edges. Simultaneously, during the positioning of the light guide plate, the corner plates 511 can rotate to adjust the angle and position of the two rubber rollers 512 according to different sizes and shapes. To further improve the positioning effect, the coil spring 510 can keep the two rubber rollers 512 in their initial state as close as possible to the light guide plate. When clamping and positioning, the corner plate 511 only needs to rotate slightly to avoid misalignment of the rubber rollers 512 during positioning, which would affect the positioning accuracy and even damage the light guide plate. After positioning, the placement plate 62 is slid to the left and the detection light source 4 is activated to perform uniformity detection on the light guide plate in conjunction with the detection base 2. After detection, the placement plate 62 is slid to the bottom of the light guide plate and the servo motor 52 is driven so that the light guide plate falls on the top of the placement plate 62. The placement plate 62 is slid to the right. When the placement plate 62 is directly below the top plate 64, the servo motor 65 is driven to rotate the cam plate 66 and release the traction rope 67. At this time, under the action of the elastic telescopic rod 63, the top plate 64 slides up and lifts the light guide plate, making it easier to remove the light guide plate after detection.

[0036] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

Claims

1. A light guide plate uniformity detection mechanism comprising a base (1), characterized in that: The middle part of the top end of the base (1) is fixedly installed with a detection base (2), the rear part of the top end of the base (1) is fixedly connected with a support (3), the bottom end of the front part of the support (3) is fixedly installed with a detection light source (4), the middle part of the top end of the base (1) is fixedly installed with a positioning structure (5), and the right part of the top end of the base (1) is fixedly installed with an auxiliary structure (6). The positioning structure (5) comprises a cavity (51) which is formed in the inside of the base (1), the middle part of the bottom end of the base (1) is fixedly installed with a servo motor (52), the output end of the servo motor (52) extends into the inside of the cavity (51), the output end of the servo motor (52) is fixedly installed with a bevel gear set (53), the bevel gear set (53) comprises three bevel gears, the bottom end of the bevel gear located in the middle position is fixedly connected with the output end of the motor, the ends away from each other of the bevel gears located on the left and right sides are all fixedly connected with lead screws (54), the ends away from each other of the two lead screws (54) are respectively rotationally connected with the left and right ends inside the cavity (51), the outer walls of the two lead screws (54) are all threadedly connected with rectangular blocks (55), the front and rear sides of the two rectangular blocks (55) are all fixedly connected with circular rods (57), the outer walls of the four circular rods (57) are all slidingly connected with sliding blocks (56), the top ends of the four sliding blocks (56) are all fixedly connected with supporting rods (58), the four supporting rods (58) all extend out of the top end of the base (1), the middle part of the top end of the base (1) is formed with four inclined holes which penetrate through the base (1), and the inner walls of the four inclined holes are respectively slidingly connected with the outer walls of the top parts of the four sliding blocks (56).

2. The light guide plate uniformity detection mechanism according to claim 1, wherein The top parts of the four supporting rods (58) are all rotationally connected with angle plates (511) which are close to the detection base (2), and the bottom ends of the four angle plates (511) are all rotationally connected with rubber rollers (512).

3. The light guide plate uniformity detection mechanism according to claim 2, wherein The top parts of the four supporting rods (58) are all fixedly connected with circular boxes (59) which are close to the detection base (2), the inner walls of the four circular boxes (59) are all fixedly connected with coil springs (510), one ends of the four coil springs (510) which are close to the shaft centers of the circular boxes (59) are respectively fixedly connected with the outer walls of the top parts of the four angle plates (511), and the four circular boxes (59) are respectively located outside the top parts of the four angle plates (511).

4. The light guide plate uniformity detection mechanism according to claim 1, characterized by, The auxiliary structure (6) comprises a slide rail (61), the bottom end of the slide rail (61) is fixedly connected with the left and right positions of the top end of the base (1), the middle part of the slide rail (61) is slidingly connected with a placing plate (62), and the middle part of the placing plate (62) is formed with a through hole which penetrates through the placing plate (62).

5. The light guide plate uniformity detection mechanism according to claim 4, wherein The right side of the sliding rail (61) is fixedly provided with a servo motor two (65), the output end of the servo motor two (65) is fixedly connected with a cam plate (66), the outer wall of the right part of the cam plate (66) movably sleeves the traction rope (67), the left end of the traction rope (67) extends to the inside of the right part of the base (1), the left end of the traction rope (67) is fixedly connected with the elastic telescopic rod (63), the output end of the elastic telescopic rod (63) is fixedly connected with the top plate (64), the shape and size of the outer wall of the top plate (64) are respectively matched with the shape and size of the inner wall of the through hole, the opposite side of the lower part of the right part of the base (1) is rotatably connected with the rotating rod (68), the outer wall of the rotating rod (68) is overlapped with the outer wall of the traction rope (67).

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