Liquid crystal screen detection tool

Abstract

A liquid crystal screen detection tool relates to the technical field of liquid crystal screen detection, and comprises a chassis horizontally arranged, a U-shaped frame rotatably installed on the chassis, a first limiting part provided between the U-shaped frame and the chassis, the first limiting part being used for fixing the U-shaped frame, a mounting frame rotatably installed between two vertical sections of the U-shaped frame, a second limiting part provided between the mounting frame and the two vertical sections of the U-shaped frame, the two second limiting parts being used for fixing the mounting frame, and a storage rack rotatably installed on the mounting frame, a third limiting part provided between the storage rack and the mounting frame, the third limiting part being used for fixing the storage rack, and the storage rack being provided with a placing position for loading the liquid crystal screen. During the detection process, the U-shaped frame, the mounting frame and the storage rack can be randomly rotated, or the rotation states of the U-shaped frame, the mounting frame and the storage rack can be limited through the first limiting part, the second limiting part and the third limiting part.

Description

Technical Field

[0001] This utility model relates to the field of LCD screen testing technology, and specifically to an LCD screen testing fixture. Background Technology

[0002] An LCD screen uses liquid crystal material as its basic component. The liquid crystal material is filled between two parallel plates. By changing the arrangement of molecules inside the liquid crystal material through voltage, the purpose of blocking and transmitting light can be achieved to display images of varying shades and staggered patterns. Moreover, by adding a three-color filter layer between the two plates, color images can be displayed.

[0003] After the LCD screen is manufactured, its key parameters (screen brightness, resolution, pressure resistance, etc.) need to be tested. Currently, the industry standard for LCD screen testing involves placing the screen on a specialized testing platform, where testing personnel use professional instruments to meticulously inspect each area. During this process, to ensure comprehensive coverage of every corner of the screen, the testing personnel need to manually adjust the screen's angle multiple times. However, this testing method lacks flexibility and freedom in adjusting the screen's angle, failing to allow for rapid angle adjustments in different directions as needed, which to some extent affects testing efficiency and the accuracy of the results. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a liquid crystal screen testing fixture to solve the problem of inconvenient adjustment of the placement angle during the liquid crystal screen testing process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A fixture for testing LCD screens includes: The chassis is horizontally arranged. A U-shaped frame is rotatably mounted on a chassis, and a first limiting part is provided between the U-shaped frame and the chassis, the first limiting part being used to fix the U-shaped frame; The mounting bracket is rotatably mounted between two vertical sections of the U-shaped frame. A second limiting part is provided between the mounting bracket and each of the two vertical sections of the U-shaped frame, and the two second limiting parts are used to fix the mounting bracket. A shelf is rotatably mounted on a mounting frame. A third limiting part is provided between the shelf and the mounting frame to fix the shelf. The shelf is provided with a placement position for installing an LCD screen.

[0006] Compared with the prior art, this utility model has the following beneficial effects: When in use, the LCD screen is placed in the placement position for testing. During the testing process, the U-shaped frame, the mounting frame, and the shelf can be rotated freely, or the rotation state of the U-shaped frame, the mounting frame, and the shelf can be limited by the first limiting part, the second limiting part, and the third limiting part, so as to realize the diversification of the LCD screen angle adjustment, improve the comprehensiveness of LCD screen testing, and ensure the efficiency and accuracy of LCD screen testing.

[0007] Preferably, the upper part of the chassis has a threaded blind hole, and the first limiting part includes a bolt threaded through and installed on one side of the horizontal section of the U-shaped frame, the bolt being used to connect with the threaded blind hole.

[0008] Preferably, the upper part of each of the two vertical sections of the U-shaped frame is provided with a first arc-shaped hole, each of the first arc-shaped holes is semi-circular and curved vertically downward, and the two second limiting parts are slidably engaged with the two first arc-shaped holes one by one.

[0009] Preferably, each of the first arc-shaped holes has a plurality of positioning grooves arranged at intervals along its trajectory on the lower inner wall. Each of the second limiting parts includes a limiting rod that is horizontally slidably disposed in the corresponding first arc-shaped hole. One end of the limiting rod is fixedly connected to the mounting bracket, and a snap-fit ​​is provided between the inner and outer sides of the other end. The snap-fit ​​is used to engage with any of the positioning grooves.

[0010] Preferably, the end of the limiting rod away from the mounting frame has a groove along its axial direction, and the lower part of the end of the limiting rod away from the mounting frame has a through hole communicating with the groove. The snap-fit ​​component includes a lever freely passing through between the inner and outer sides of the groove and a positioning post slidably disposed between the through hole and the groove. The lever is fixedly connected to the side wall of the positioning post, and the end of the positioning post located in the groove is elastically connected to the inner wall of the groove by a spring. The positioning post is used to insert and cooperate with any positioning groove.

[0011] Preferably, the mounting bracket has a mounting hole along an axial direction perpendicular to its rotation trajectory. The mounting hole is located on one side of the two rotation connection points between the mounting bracket and the U-shaped frame, and a second arc-shaped hole is formed along its trajectory. The shelf is rotatably connected to the mounting hole, and the third limiting part freely passes through the second arc-shaped hole and is used to abut against the side wall of the shelf.

[0012] Preferably, the third limiting part includes a stud at one end that is fixedly connected to the shelf, and the stud freely passes through the second arc-shaped hole and is threadedly connected to the wing nut.

[0013] Preferably, the shelf includes an assembly tray, the diameters of the two ends of the assembly tray are larger than the diameter of the middle part, the small diameter section of the assembly tray is rotatably engaged in the mounting hole, the two large diameter sections of the assembly tray are respectively located on both sides of the mounting frame, the stud is fixedly connected to the side wall of the small diameter section of the assembly tray, and the placement position is set on one end face of the assembly tray.

[0014] Preferably, the assembly tray is hollow inside, and the placement position is an adsorption groove opened on one end face of the assembly tray. The bottom of the adsorption groove is provided with several evenly distributed adsorption holes. An air pipe connector is fixedly installed on the other end face of the assembly tray. The several adsorption holes and the air pipe connector are all connected to the interior of the assembly tray.

[0015] Preferably, the side wall of the chassis is provided with an indicator line, and the bottom of one vertical section of the U-shaped frame is provided with an indicator arrow. When the indicator arrow is facing the indicator line, the bolt and the threaded blind hole are arranged opposite each other.

[0016] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the mid-chassis structure.

[0019] Figure 3 for Figure 1 A magnified view of part I.

[0020] Figure 4 for Figure 3 A cross-sectional view of the second limiting part.

[0021] Figure 5 for Figure 1 A schematic diagram of the mounting bracket.

[0022] Figure 6 for Figure 1 A schematic diagram of the assembly tray in the diagram.

[0023] The numbers in the diagram are as follows: 1. Chassis; 11. Shaft; 12. Threaded blind hole; 13. Indicator line; 2. U-shaped frame; 21. First arc-shaped hole; 22. Positioning groove; 23. Bolt; 24. Indicator arrow; 3. Mounting bracket; 31. Mounting hole; 32. Second arc-shaped hole; 33. Connecting shaft; 34. Limiting rod; 35. Slide groove; 36. Through hole; 37. Pulley; 38. Positioning post; 39. Spring; 4. Assembly plate; 41. Adsorption groove; 42. Adsorption hole; 43. Air pipe connector; 44. Stud; 45. Wing nut; 46. Limiting plate. Detailed Implementation

[0024] To make the technical means, creative features, achieved objectives and functions of this utility model clearer and easier to understand, the utility model will be further described below with reference to the accompanying drawings and specific embodiments: like Figure 1-2 As shown, an embodiment of this utility model provides a liquid crystal screen testing fixture, including: a chassis 1, which is horizontally arranged; a U-shaped frame 2, which is coaxially and rotatably mounted on the chassis 1 via a rotating shaft 11 fixedly mounted on its bottom, wherein a first limiting part is provided between the U-shaped frame 2 and the chassis 1, and the first limiting part is used to fix the U-shaped frame 2; a mounting frame 3, which is rotatably mounted between two vertical sections of the U-shaped frame 2 via two connecting shafts 33 located on its two sides, wherein a second limiting part is provided between the mounting frame 3 and the two vertical sections of the U-shaped frame 2, and the two second limiting parts are used to fix the mounting frame 3; and a shelf, which is rotatably mounted on the mounting frame 3, wherein a third limiting part is provided between the shelf and the mounting frame 3, and the third limiting part is used to fix the shelf, wherein the shelf has a placement position for loading the liquid crystal screen.

[0025] The LCD screen is placed in the placement position for testing. During the testing process, the U-shaped frame 2, the mounting frame 3, and the shelf can be rotated freely, or the rotation state of the U-shaped frame 2, the mounting frame 3, and the shelf can be limited by the first limit part, the second limit part, and the third limit part, so as to realize the diversification of LCD screen angle adjustment, improve the comprehensiveness of LCD screen testing, and ensure the efficiency and accuracy of LCD screen testing.

[0026] like Figure 1-2As shown, according to another embodiment of the present invention, the LCD screen testing fixture further optimizes its first limiting part. The upper part of the chassis 1 is provided with a threaded blind hole 12. The first limiting part includes a bolt 23 threaded through and installed on one side of the horizontal section of the U-shaped frame 2. The bolt 23 is used to be threadedly connected to the threaded blind hole 12. Preferably, the side wall of the chassis 1 is provided with an indicator line 13, and the bottom of one vertical section of the U-shaped frame 2 is provided with an indicator arrow 24. When the indicator arrow 24 is facing the indicator line 13, the bolt 23 and the threaded blind hole 12 are arranged opposite each other to facilitate quick connection of the bolt 23 and the threaded blind hole 12. Loosening the bolt 23 disengages it from the threaded blind hole 12, at which point the U-shaped frame 2 can be rotated freely.

[0027] like Figure 1 as well as Figure 3-4 As shown, according to another embodiment of the present invention, the LCD screen testing fixture further optimizes the second limiting part, and the upper part of the two vertical sections of the U-shaped frame 2 is provided with a first arc-shaped hole 21. Each of the first arc-shaped holes 21 is semi-circular and curved vertically downward. The two second limiting parts correspond one-to-one with the two first arc-shaped holes 21 and slide and engage.

[0028] A plurality of positioning grooves 22 are provided on the lower inner wall of each of the first arc-shaped holes 21 along its trajectory. Each of the second limiting parts includes a limiting rod 34 that is horizontally slidably disposed in the corresponding first arc-shaped hole 21. One end of the limiting rod 34 is fixedly connected to the mounting bracket 3, and a snap-fit ​​is provided between the inner and outer sides of the other end. The snap-fit ​​is used to insert and cooperate with any positioning groove 22.

[0029] The limiting rod 34 has a groove 35 along its axial direction at the end away from the mounting bracket 3, and a through hole 36 communicating with the groove 35 at the lower part of the end away from the mounting bracket 3. The snap-fit ​​component includes a lever 37 freely disposed between the inner and outer sides of the groove 35 and a positioning post 38 slidably disposed between the through hole 36 and the groove 35. The lever 37 is fixedly connected to the side wall of the positioning post 38. The end of the positioning post 38 located in the groove 35 is elastically connected to the inner wall of the groove 35 by a spring 39. The positioning post 38 is used to insert and cooperate with any positioning groove 22.

[0030] Moving each lever 37 causes the positioning pin 38 to move into the slide groove 35, disengaging the positioning pin 38 from the positioning groove 22 and compressing the spring 39. Then, rotating the mounting bracket 3 causes the two limiting rods 34 to slide within the corresponding first arc-shaped hole 21. When the mounting bracket 3 rotates to the designated position, each positioning pin 38 is aligned with the positioning groove 22 at that position. Then, releasing each lever 37 pushes the positioning pin 38 into the positioning groove 22 under the elastic force of the spring 39, thereby fixing the position of the mounting bracket 3.

[0031] like Figure 1 as well as Figure 5-6 As shown, according to another embodiment of the present invention, the LCD screen testing fixture further optimizes its third limiting part. The mounting frame 3 has a mounting hole 31 along an axial direction perpendicular to its rotation trajectory. The mounting hole 31 is located on one side of the two rotation connection points between the mounting frame 3 and the U-shaped frame 2, and a second arc-shaped hole 32 is formed along its trajectory. The shelf is rotatably connected to the mounting hole 31. The third limiting part freely passes through the second arc-shaped hole 32 and is used to abut against the side wall of the shelf. The third limiting part includes a stud 44 with one end fixedly connected to the shelf. The stud 44 freely passes through the second arc-shaped hole 32 and is threadedly connected to a wing nut 45. By operating the stud 44 to slide along the second arc-shaped hole 32, the shelf is driven to rotate. After rotating to the position, the wing nut 45 is screwed to abut against the mounting frame 3, thereby fixing the position of the shelf. Preferably, a limiting plate 46 is fixedly installed on the end of the stud 44 that passes through the second arc-shaped hole 32 to prevent the wing nut 45 from disengaging from the bolt 23.

[0032] like Figure 6 As shown, according to another embodiment of the present invention, the LCD screen testing fixture preferably includes an assembly tray 4, the diameters of the two ends of the assembly tray 4 being larger than the diameter of its middle portion. The smaller diameter segment of the assembly tray 4 is rotatably engaged in the mounting hole 31. The two larger diameter segments of the assembly tray 4 are respectively located on both sides of the mounting bracket 3, ensuring the stability of the rotation of the assembly tray 4 and the mounting hole 31. The stud 44 is fixedly connected to the side wall of the smaller diameter segment of the assembly tray 4. The placement position is located on one end face of the assembly tray 4. Preferably, the interior of the assembly tray 4 is hollow, and the placement position is... An adsorption groove 41 is formed on one end face of the assembly tray 4. The bottom of the adsorption groove 41 has several evenly distributed adsorption holes 42. An air pipe connector 43 is fixedly installed on the other end face of the assembly tray 4. The adsorption holes 42 and the air pipe connector 43 are all connected to the interior of the assembly tray 4. The air pipe connector 43 is connected to an external vacuum generator through a hose. The length of the hose is sufficient to ensure the normal rotation of the U-shaped frame 2, the mounting frame 3, and the assembly tray 4. The vacuum generator is a device that provides negative pressure. Its specific structure and operating principle are existing technologies and will not be described in detail here.

[0033] The working principle of this utility model is as follows: When using this utility model, the LCD screen is placed in the adsorption tank 41, the external vacuum generator is started, and the LCD screen is adsorbed and fixed through the hose, air pipe connector 43, and several adsorption holes 42. Then, according to the testing requirements, the bolts 23 can be loosened to rotate the U-shaped frame 2; each lever 37 can also be moved to drive the positioning post 38 into the sliding groove 35, so that the positioning post 38 is disengaged from the positioning groove 22, and the spring 39 is compressed at the same time. Then, the mounting frame 3 is rotated so that the two limiting rods 34 slide in the corresponding first arc-shaped hole 21. When the mounting frame When rotated to the designated position, each positioning post 38 is aligned with the positioning groove 22 at that position. Then, each lever 37 is released, and under the elastic force of the spring 39, the positioning post 38 is pushed into the positioning groove 22, thereby fixing the position of the mounting bracket 3. Finally, the wing nut 45 can be loosened, and the stud 44 can be operated to slide along the second arc-shaped hole 32 to drive the shelf to rotate. After rotating to the position, the wing nut 45 is tightened to make it abut against the mounting bracket 3, thereby fixing the position of the shelf. Through the above different angle adjustment methods, the all-round test of the LCD screen is completed.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fixture for testing LCD screens, characterized in that, include: The chassis (1) is horizontally arranged; A U-shaped frame (2) is rotatably mounted on a chassis (1). A first limiting part is provided between the U-shaped frame (2) and the chassis (1). The first limiting part is used to fix the U-shaped frame (2). The mounting bracket (3) is rotatably mounted between the two vertical sections of the U-shaped frame (2). A second limiting part is provided between the mounting bracket (3) and the two vertical sections of the U-shaped frame (2), and the two second limiting parts are used to fix the mounting bracket (3); and The shelf is rotatably mounted on the mounting frame (3). A third limiting part is provided between the shelf and the mounting frame (3). The third limiting part is used to fix the shelf. The shelf is provided with a placement position for installing an LCD screen.

2. The LCD screen testing fixture according to claim 1, characterized in that, The upper part of the chassis (1) is provided with a threaded blind hole (12), and the first limiting part includes a bolt (23) threaded through and installed on one side of the horizontal section of the U-shaped frame (2). The bolt (23) is used to be threadedly connected to the threaded blind hole (12).

3. The LCD screen testing fixture according to claim 1, characterized in that, The upper part of the two vertical sections of the U-shaped frame (2) is provided with a first arc-shaped hole (21). Each of the first arc-shaped holes (21) is semi-circular and curved vertically downward. The two second limiting parts correspond to each other and slide and engage with the two first arc-shaped holes (21).

4. The LCD screen testing fixture according to claim 3, characterized in that, Each of the first arc-shaped holes (21) has a plurality of positioning grooves (22) arranged at intervals along its trajectory on the lower inner wall. Each of the second limiting parts includes a limiting rod (34) that is horizontally slidably disposed in the corresponding first arc-shaped hole (21). One end of the limiting rod (34) is fixedly connected to the mounting bracket (3), and a snap-fit ​​is provided between the inner and outer sides of the other end. The snap-fit ​​is used to insert and cooperate with any positioning groove (22).

5. The LCD screen testing fixture according to claim 4, characterized in that, The limiting rod (34) has a groove (35) along its axial direction at one end away from the mounting bracket (3), and a through hole (36) communicating with the groove (35) is provided at the lower part of the end of the limiting rod (34) away from the mounting bracket (3). The snap-fit ​​component includes a lever (37) freely disposed between the inner and outer sides of the groove (35) and a positioning post (38) slidably disposed between the through hole (36) and the groove (35). The lever (37) is fixedly connected to the side wall of the positioning post (38). One end of the positioning post (38) located in the groove (35) is elastically connected to the inner wall of the groove (35) by a spring (39). The positioning post (38) is used to insert and cooperate with any positioning groove (22).

6. The LCD screen testing fixture according to claim 1, characterized in that, The mounting bracket (3) has a mounting hole (31) along an axis perpendicular to its rotation trajectory. The mounting hole (31) is located on one side of the two rotation connection points between the mounting bracket (3) and the U-shaped bracket (2) and has a second arc-shaped hole (32) along its trajectory. The shelf is rotatably connected to the mounting hole (31). The third limiting part freely passes through the second arc-shaped hole (32) and is used to abut against the side wall of the shelf.

7. The LCD screen testing fixture according to claim 6, characterized in that, The third limiting part includes a stud (44) that is fixedly connected to the shelf at one end. The stud (44) passes freely through the second arc-shaped hole (32) and is threadedly connected to the wing nut (45).

8. The LCD screen testing fixture according to claim 7, characterized in that, The shelf includes an assembly tray (4), the diameters of the two ends of the assembly tray (4) are larger than the diameter of the middle part, the small diameter section of the assembly tray (4) is rotatably engaged in the mounting hole (31), the two large diameter sections of the assembly tray (4) are respectively located on both sides of the mounting frame (3), the stud (44) is fixedly connected to the side wall of the small diameter section of the assembly tray (4), and the placement position is set on one end face of the assembly tray (4).

9. The LCD screen testing fixture according to claim 8, characterized in that, The assembly tray (4) is hollow inside. The placement position is an adsorption groove (41) opened on one end face of the assembly tray (4). The bottom of the adsorption groove (41) is provided with several evenly distributed adsorption holes (42). An air pipe connector (43) is fixedly installed on the other end face of the assembly tray (4). The several adsorption holes (42) and the air pipe connector (43) are all connected to the interior of the assembly tray (4).

10. The LCD screen testing fixture according to claim 2, characterized in that, The side wall of the chassis (1) is provided with an indicator line (13), and the bottom of one vertical section of the U-shaped frame (2) is provided with an indicator arrow (24). When the indicator arrow (24) is facing the indicator line (13), the bolt (23) and the threaded blind hole (12) are arranged opposite each other.

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