Detection tool for LED liquid crystal display screen production

Abstract

The invention relates to a detection tool for LED liquid crystal display screen production, and relates to the field of liquid crystal display screens. The inflation assembly is fixedly mounted on the bracket; the upper part of the supporting assembly is fixedly mounted in the upper end of the inflating assembly; the symmetrical plug-in assemblies are fixedly mounted on the supporting assembly; the pressing assembly is fixedly mounted on the upper side in the frame; the upper part of the liquid crystal display screen is limited by the pressing plate, and after insertion is completed, the liquid crystal display screen is adsorbed and fixed by the vacuum chuck, so that the insertion position is prevented from loosening in the first and second air tightness detection processes, the liquid crystal display screen slowly ascends under the speed limiting of the resistance increasing plate, and slight air leakage of the liquid crystal display screen is prevented; whether the liquid crystal display screen passes the first air tightness detection is detected by observing whether the prompting mechanism is turned on or not, and if the supporting plate descends, it is indicated that the second air tightness detection does not pass the first air tightness detection.

Description

Technical Field

[0001] The present application relates to the field of liquid crystal display screens, and in particular to a detection tooling for the production of LED liquid crystal display screens. Background Art

[0002] In the production process of liquid crystal display (LED), testing is a very important link to ensure that product quality and performance meet the standards. Testing tooling is a variety of tools and equipment used to test LCD panels. The airtightness test of LCD is a very important quality control step. The main reason is that the LCD will not malfunction due to the influence of the external environment during long-term use.

[0003] The Chinese patent with publication number CN118706412A and name “A method for inspecting the quality of a liquid crystal display panel” includes a transmission mechanism, which includes a transmission roller. The number of the transmission rollers is two, and the outer side walls of the two transmission rollers are jointly connected to two transmission bars. A detection mechanism is arranged above the transmission bar, and the detection mechanism includes a detection camera. Electric push rods are arranged below the detection camera on both sides. Through the detection mechanism, the liquid crystal display screen can be stably clamped, and the display screen docking plug can be pushed up to dock with the display screen so that the display screen is opened. Then, the display screen is captured and collected by the detection camera, and compared with the externally stored data, to verify whether the liquid crystal display panel has color difference, point-like impurities, linear impurities, bad pixels and other problems, without the need for users to manually visually inspect and manually connect the power cord and signal line of the liquid crystal display panel.

[0004] The prior art of the above patent can also realize the detection of LCD screens. However, when detecting the LCD screens, it does not take into account the possibility that the LCD screens may be unsealed due to the upper and lower shells not being closed during the actual production process. Due to the different usage environments of LCD screens, it is difficult to ensure the cleanliness of the internal environment of unsealed LCD screens, and pollutants such as dust and particulate matter may enter, affecting the quality and reliability of the LCD screens. The above technology does not have the function of performing airtightness detection on LCD screens. Summary of the invention

[0005] In order to accurately realize the function of detecting a liquid crystal display screen, the present application provides a detection tool for the production of LED liquid crystal displays.

[0006] The present application provides a detection tool for the production of LED liquid crystal display screens using the following technical solutions:

[0007] A detection tool for the production of LED liquid crystal display screens, comprising: a bracket, a frame fixedly mounted on the upper part of which is a U-shaped structure; an inflatable component fixedly mounted on the bracket, the inflatable component is used to inflate the inside of the liquid crystal display screen when the liquid crystal display screen is tested for air tightness; a support component, the upper part of which is fixedly mounted inside the upper end of the inflatable component, the support component is used to support and limit the position of the liquid crystal display screen; a plug-in component, a symmetrical plug-in component fixedly mounted on the support component, the plug-in component is used to plug the inflatable port of the liquid crystal display screen whose position has been adjusted on the support component; a pressing component fixedly mounted on the upper side of the frame, the pressing component is used to limit the position of the liquid crystal display screen and provide pressure when testing for air tightness.

[0008] Furthermore, the inflation component includes a protective cover, a mounting plate, an outer sleeve, an inner sleeve, a tension spring and a warning mechanism, the upper part of the protective cover is fixedly mounted on the bracket, the mounting plates are fixedly mounted on the front and rear inner walls of the protective cover, the outer sleeve is fixedly mounted between the mounting plates, the inner sleeve is provided with an inner sleeve that can slide up and down, a tension spring is connected between the inner sleeve and the outer sleeve, the lower part of the outer sleeve is fixedly mounted with a warning mechanism, the lower part of the outer sleeve is provided with an air inlet, and the air inlet is communicated with the interior of the outer sleeve and the inner sleeve.

[0009] Furthermore, the warning mechanism includes a positive coil, a negative coil, a warning light, a sleeve and a gravity ring. The positive coil and the negative coil are fixedly installed on the inner wall of the outer cylinder, and the warning light is fixedly installed on the outside of the outer cylinder. The warning light with a built-in power supply is electrically connected to the positive coil and the negative coil. A sleeve is fixedly installed on the upper end of the outer sleeve, a water storage chamber is opened in the sleeve, and a gravity ring that can slide up and down is arranged in the water storage chamber.

[0010] Furthermore, the support assembly includes a support plate and a clamping mechanism, the support plate is fixedly installed on the upper end of the inner tube, a through groove is opened on the support plate, the through groove is connected to the inner cavity of the inner tube, and the clamping mechanism is fixedly installed on the four inner walls of the protective cover; the clamping mechanism includes an electric push rod and a push plate, the electric push rod is fixedly installed on the inner wall of the protective cover, and the push plate is fixedly installed on the output end of the electric push rod.

[0011] Furthermore, the plug-in assembly includes an inclined groove, a sliding rod, a lifting rod, a vacuum suction cup, a spring 1, a resistance-increasing mechanism, a plug-in mechanism and a prompt mechanism. A sliding groove is provided on the support plate, and a symmetrical inclined groove is provided on the inner side wall of the sliding groove. The inclined groove is a structure that gradually moves upward from the inside to the outside. A slidable sliding block 1 is provided in the inclined groove. The sliding block 1 is elastically connected to the inclined groove. A sliding rod is connected between the sliding blocks 1. A lifting groove is provided on the sliding rod. A lifting rod that can slide up and down is provided in the lifting groove. A vacuum suction cup is fixedly installed on the upper end of the lifting rod, and a shock-absorbing pad is provided in the adsorption position of the vacuum suction cup. A spring 1 is connected between the lower end of the lifting rod and the lifting groove, a resistance-increasing mechanism that can slide left and right is provided at the side wall of the sliding rod, a plug-in mechanism that can slide up and down is provided in the through groove, and a prompt mechanism is fixedly installed on the support plate.

[0012] Furthermore, the resistance increasing mechanism includes a connecting plate, spring 2 and a resistance increasing plate. A connecting plate that can slide left and right is arranged on the side wall of the sliding rod. Spring 2 is connected between the connecting plate and the resistance increasing groove. The resistance increasing plate is fixedly installed on the connecting plate. The resistance increasing plate is made of rubber material. A serrated groove is provided on the lifting rod. A serrated block matching the serrated groove is provided on the outer end face of the resistance increasing plate.

[0013] Furthermore, the plug-in mechanism includes an extrusion block, a circular ring, a plug-in plate, a telescopic sleeve, a limit ring, a plug-in interface, a rubber ring and a spring. An extrusion block that can slide left and right is arranged on the inner side of the sliding groove. The inner side surface of the extrusion block is an inclined surface gradually upward from left to right. The extrusion block and the sliding groove are elastically connected. A circular ring that can slide up and down is arranged in the through groove. The circular ring and the plug-in plate are connected by a telescopic sleeve. A spring is connected between the plug-in plate and the support plate. A limit ring is fixedly installed on the inner side wall of the through groove. The limit ring is located between the circular ring and the plug-in plate to limit the circular ring. A symmetrical plug-in interface is fixedly installed on the plug-in plate, and a rubber ring is fixedly installed on the plug-in plate.

[0014] Furthermore, the prompt mechanism includes an insulating cover, a battery pack, a prompt light, a conductive member and a conductive sheet. The insulating cover is fixedly mounted on the lower side of the support plate. The battery pack and the prompt light built into the insulating cover are electrically connected to the conductive member on the side wall of the sliding rod. The number of the conductive members is two. A conductive sheet is provided at the bottom of the outer wall of the lifting rod. The positions of the conductive member and the conductive sheet correspond to each other.

[0015] Furthermore, the pressing assembly includes electric push rod 2, a pressing frame, a fixed plate, electric push rod 3, a pressing plate and a pressing mechanism. Electric push rod 2 is connected between the frame and the pressing frame, electric push rod 3 is connected between the pressing frame and the fixed plate, a pressing plate is fixedly installed on the output end of electric push rod 3, and a pressing mechanism is symmetrically arranged on the fixed plate.

[0016] Furthermore, the pressing mechanism includes a rack plate 1, a mounting frame, a fixed rod, a gear, an extrusion frame and a rack plate 2. The rack plate 1 is fixedly installed on the outer surface of the pressing plate, a symmetrical mounting frame is fixedly installed on the fixed plate, a fixed rod is fixedly installed between the mounting frames, a gear is installed on the fixed rod, an extrusion frame that can slide up and down is arranged on the outer side of the fixed plate, and a rack plate 2 is fixedly installed on the extrusion frame. The rack plate 1 and the rack plate 2 are meshed with each other through gears.

[0017] In the above technical scheme, the present invention provides a detection tool for the production of LED liquid crystal display screens. The clamping mechanism of the present invention is adjusted according to the size of the liquid crystal display screen, and then the liquid crystal display screen is placed on the support plate. As the gravity of the liquid crystal display screen decreases, at the same time, the pressing plate limits the upper part of the liquid crystal display screen, and the rising plug interface is plugged with the socket of the liquid crystal display screen. After the plugging is completed, the vacuum suction cup adsorbs and fixes the lower end of the liquid crystal display screen to prevent loosening at the plugging position during the first and second air tightness tests. As the air pump gradually inflates the inflation component and the inside of the liquid crystal display screen, the air pressure expands the telescopic sleeve to drive the liquid crystal display screen to rise, and the liquid crystal display screen follows Ascend. Under the speed limit of the resistance-increasing plate, the LCD screen rises slowly to prevent slight air leakage in the LCD screen during the first air tightness test. However, the LCD screen has directly risen and affected the final test result. As the lifting rod gradually rises, the LCD screen is detected whether it has passed the first air tightness test by observing whether the prompt mechanism lights up. If it passes the first air tightness test, continue with the second air tightness test and press the support plate through the pressing frame. If the support plate drops, it means that the second air tightness test has failed. During the entire air tightness test, the warning mechanism is used to detect whether there is a sealing ring failure between the inner cylinder and the outer cylinder to prevent the sealing ring from being replaced in time and affecting the test result. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a three-dimensional structural schematic diagram of this application.

[0020] Figure 2 It is a schematic diagram of the cutaway structure of this application.

[0021] Figure 3 It is a schematic plan view of the cutaway structure of the present application.

[0022] Figure 4 This application Figure 3 Enlarged view of X.

[0023] Figure 5 This application Figure 3 Enlarged view of Y.

[0024] Figure 6 It is a schematic diagram of the cross-sectional structure of the plug-in assembly of the present application.

[0025] Figure 7 This application Figure 7 Enlarged view of point Z.

[0026] Figure 8 This application Figure 7 Enlarged view of point M.

[0027] Fig. 9 This application Figure 7 Enlarged view of location N.

[0028] Fig.10 It is a schematic diagram of the cross-section structure of the pressing component of the present application.

[0029] Fig.11 It is a schematic diagram of the socket of the liquid crystal display screen of this application.

[0030] Description of reference numerals: 1. bracket; 11. frame; 2. inflatable component; 21. protective cover; 22. mounting plate; 23. outer sleeve; 24. inner sleeve; 25. tension spring; 26. warning mechanism; 261. positive coil; 262. negative coil; 263. warning light; 264. sleeve; 265. gravity ring; 3. support component; 31. support plate; 32. clamping mechanism; 321. electric push rod 1; 322. push plate; 4. plug-in component; 41. inclined slot; 42. slide rod; 43. lifting rod; 44. vacuum suction cup; 46. spring 1; 47. resistance increasing mechanism; 471. connecting plate; 472. spring 2; 473. resistance increasing plate; 48. Plug-in mechanism; 481. Extrusion block; 482. Ring; 483. Plug-in plate; 484. Telescopic sleeve; 485. Limiting ring; 486. Plug-in interface; 487. Rubber ring; 488. Spring three; 49. Prompt mechanism; 491. Insulating cover; 492. Battery pack; 493. Light bulb; 494. Conductive member; 495. Conductive sheet; 5. Pressing assembly; 51. Electric push rod two; 52. Pressing frame; 53. Fixed plate; 54. Electric push rod three; 55. Pressing plate; 56. Pressing mechanism; 561. Rack plate one; 562. Mounting frame; 563. Fixed rod; 564. Gear; 565. Pressing frame; 566. Rack plate two. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1-Figure 11A detection tool for the production of LED liquid crystal display screens provided in an embodiment of the present invention comprises: a bracket 1, on the upper part of which a frame 11 is fixedly installed, and the frame 11 is a U-shaped structure; an inflatable component 2, which is fixedly installed on the bracket 1, and the inflatable component 2 is used to inflate the inside of the liquid crystal display screen when the liquid crystal display screen is tested for air tightness; a support component 3, the upper part of which is fixedly installed inside the upper end of the inflatable component 2, and the support component 3 is used to support and limit the position of the liquid crystal display screen; a plug-in component 4, on which a symmetrical plug-in component 4 is fixedly installed, and the plug-in component 4 is used to plug the inflatable port of the liquid crystal display screen whose position has been adjusted on the support component 3; a pressing component 5, which is fixedly installed on the upper side of the frame 11, and the pressing component 5 is used to limit the position of the liquid crystal display screen and provide pressure when testing the air tightness.

[0033] In the above technical solution, the support component 3 is used to limit the periphery of the liquid crystal display screen placed therein, and the liquid crystal display is placed above the support component 3. When the position adjustment of the liquid crystal display screen is completed, the support component 3 is reset, and the pressing component 5 limits the upper part of the liquid crystal display screen. After being pressed, the plug-in component 4 rises and contacts the interface of the liquid crystal display screen (refer to Fig.11 ) align and plug in (the upper limit of the pressing component 5 prevents the plug-in component 4 from lifting the LCD screen). When the inflation port of the LCD screen is plugged in with the plug-in component 4, the plug-in component 4 adsorbs and fixes the lower end surface of the LCD screen. The pressing component 5 moves upward to stop limiting the LCD screen. It is connected to the lower end of the inflation component 2 through an external air pump. The gas is used to inflate the inside of the LCD screen. The light of the plug-in component 4 is observed. If the light of the plug-in component 4 is not on, it means that there is an air leak in the LCD screen. Otherwise, it means that the first air tightness test is qualified. Continue with the second air tightness test. Press the support component 3 through the pressing component 5 to observe whether the support component 3 drops and the inflation component 2 is not lit. This means that the second test of the LCD screen has passed and the LCD display is qualified for air tightness.

[0034] See also Figure 2 , Figure 3 , Figure 4 As shown, as the preferred technical solution of this embodiment, the inflatable component 2 includes a protective cover 21, a mounting plate 22, an outer sleeve 23, an inner sleeve 24, a tension spring 25 and a warning mechanism 26. The upper part of the protective cover 21 is fixedly mounted on the bracket 1, and the mounting plates 22 are fixedly mounted on the front and rear inner walls of the protective cover 21. The outer sleeve 23 is fixedly mounted between the mounting plates 22. The inner sleeve 24 that can slide up and down is arranged inside the outer sleeve 23. A tension spring 25 is connected between the inner sleeve 24 and the outer sleeve. The warning mechanism 26 is fixedly mounted on the lower part of the outer sleeve. An air inlet is opened at the lower part of the outer sleeve, and the air inlet is communicated with the interior of the outer sleeve 23 and the inner sleeve 24.

[0035] In the above technical scheme, after the plug-in component 4 adsorbs and fixes the LCD screen, the air pump inflates the interior of the outer sleeve 23 and the inner cylinder 24 through the air inlet. After the first air tightness test is qualified, the pressing component 5 presses the support component 3. If the support component 3 drops, it means that the second air tightness test is unqualified. Otherwise, it means that the second air tightness test is qualified. The warning mechanism 26 is set to check the sealing condition between the outer sleeve 23 and the inner cylinder 24. When the sealing ring is leaking and damaged, the warning mechanism 26 lights up, which means that the sealing ring between the inner cylinder 24 and the outer sleeve 23 fails, affecting the effect of the LCD screen detection. The sealing ring needs to be replaced in time. Under the premise of ensuring the effective sealing between the outer sleeve 23 and the inner cylinder 24, the first and second air tightness tests are carried out.

[0036] See also Figure 3 and Figure 4 As shown, as the preferred technical solution of this embodiment, the warning mechanism 26 includes a positive coil 261, a negative coil 262, a warning light 263, a sleeve 264 and a gravity ring 265. The positive coil 261 and the negative coil 262 are fixedly installed on the inner wall of the outer cylinder, and the warning light 263 is fixedly installed on the outside of the outer cylinder. The warning light 263 with a built-in power supply is electrically connected to the positive coil 261 and the negative coil 262. A sleeve 264 is fixedly installed on the upper end of the outer sleeve 23, and a water storage chamber is opened in the sleeve 264, and a gravity ring 265 that can slide up and down is arranged in the water storage chamber.

[0037] In the above technical solution, when the sleeve 264 is filled with water, the gravity ring 265 is located at the upper part of the water chamber, and the gravity ring 265 applies pressure to the water in the water chamber. If a gap occurs in the sealing ring between the inner sleeve 24 and the outer sleeve 23, the gravity ring 265 prevents the sealing ring from having a slight gap that affects the detection effect. The water in the water chamber flows in from the gap. When the water flows through the positive coil 261 and the negative coil 262 at the same time, a passage is formed between the positive coil 261, the negative coil 262 and the warning light 263, and the warning light 263 lights up, indicating that the sealing ring needs to be replaced.

[0038] Continue reading Figure 3 As shown, as a preferred technical solution of this embodiment, the support assembly 3 includes a support plate 31 and a clamping mechanism 32, the support plate 31 is fixedly mounted on the upper end of the inner tube 24, a through groove is opened on the support plate 31, the through groove is connected to the inner cavity of the inner tube 24, and the clamping mechanism 32 is fixedly mounted on the four inner side walls of the protective cover 21; the clamping mechanism 32 includes an electric push rod 321 and a push plate 322, the electric push rod 321 is fixedly mounted on the inner side wall of the protective cover 21, and the push plate 322 is fixedly mounted on the output end of the electric push rod 321.

[0039] In the above technical solution, the electric push rod 321 is started and drives the push plate 322 to move inward. When the local area formed by the push plate 322 corresponds to the size of the LCD screen, the electric push rod 321 stops moving, and the LCD screen is placed on the support plate 31. The push plate 322 adjusts the position of the LCD screen so that the LCD screen is at the center of the support plate 31. The push plate 322 is made of a grid structure to prevent the push plate 322 from blocking the air leakage of the LCD screen and affecting the detection result.

[0040] See also Figure 3 , Figure 6 , Figure 7 and Figure 8 As shown in the figure, as a preferred technical solution of this embodiment, the plug-in assembly 4 includes an inclined groove 41, a slide bar 42, a lifting rod 43, a vacuum suction cup 44, a spring 46, a resistance increasing mechanism 47, a plug-in mechanism 48 and a prompting mechanism 49. The support plate 31 is provided with a sliding groove, and a symmetrical inclined groove 41 is provided on the inner side wall of the sliding groove. The inclined groove 41 is a structure that gradually moves upward from the inside to the outside. A slidable sliding block 1 is provided in the inclined groove 41, and the sliding block 1 is elastically connected to the inclined groove 41. A slide bar 42 is connected between the moving blocks, a lifting groove is provided on the slide bar 42, a lifting rod 43 which can slide up and down is arranged in the lifting groove, a vacuum suction cup 44 is fixedly installed on the upper end of the lifting rod 43, a shock-absorbing pad is arranged in the adsorption position of the vacuum suction cup 44, a spring 46 is connected between the lower end of the lifting rod 43 and the lifting groove, a resistance-increasing mechanism 47 which can slide left and right is arranged on the side wall of the slide bar 42, a plug-in mechanism 48 which can slide up and down is arranged in the through groove, and a prompt mechanism 49 is fixedly installed on the support plate 31.

[0041] In the above technical solution, when the LCD screen is placed on the support plate 31, the gravity of the LCD screen drives the slide bar 42 to slide inward and downward in the inclined groove 41, and the slide bar 42 drives the lifting rod 43 and the vacuum suction cup 44 to move synchronously. The slide bar 42 squeezes the plug-in mechanism 48, so that the plug-in mechanism 48 is plugged with the interface of the LCD screen. When the slide bar 42 moves to the innermost side, the vacuum suction cup 44 adsorbs and fixes the lower end surface of the LCD screen, and the resistance increasing mechanism 47 is squeezed, so that the lifting rod 43 is lifted up. The resistance encountered increases. After the interior of the LCD screen is inflated, the pressing component 5 squeezes the support plate 31, so that the air in the LCD screen and the inner tube 24 and the outer tube 23 is compressed, and the plug-in mechanism 48 is stretched open. The plug-in mechanism 48 lifts the LCD screen. Since the resistance-increasing mechanism 47 applies pressure to the lifting rod 43, the lifting rod 43 encounters resistance when rising and rises slowly. When the lifting rod 43 rises to the highest position, the prompt mechanism 49 lights up, indicating that the LCD screen has passed the first air tightness test.

[0042] See also Figure 6 and Fig. 9 As shown, the resistance increasing mechanism 47 includes a connecting plate 471, a spring 472 and a resistance increasing plate 473. A connecting plate 471 which can slide left and right is arranged on the side wall of the slide bar 42. A spring 472 is connected between the connecting plate 471 and the resistance increasing groove. A resistance increasing plate 473 is fixedly mounted on the connecting plate 471. The resistance increasing plate 473 is made of rubber material. A serrated groove is provided on the lifting rod 43. A serrated block matching the serrated groove is provided on the outer end face of the resistance increasing plate 473.

[0043] In the above technical solution, when the slide bar 42 moves to the innermost side, the connecting plate 471 moves synchronously, the connecting plate 471 is squeezed by the support plate 31, and the connecting plate 471 moves outward, and the resistance increasing plate 473 moves synchronously, so that the resistance increasing plate 473 is in close contact with the lifting rod 43, and pressure is applied to the lifting rod 43 during the rising process (the resistance-type rise of the lifting rod 43 increases the difficulty of its rise. If the air tightness in the liquid crystal display screen is qualified, the gas rushing in will push the telescopic sleeve 484 to fill and rise, and the lifting rod 43 will It rises to the highest position only when there is a gas leak in the LCD screen. The resistance-type lifting rod 43 is difficult to rise. At this time, the gas rushed in leaks out from the leaking position. When the gas rushed in is quantitatively input, part of the gas will leak out from the leaking position. At this time, the inside of the telescopic sleeve 484 is not full, and the lifting rod 43 has not risen to the highest position. At this time, the prompt mechanism 49 is not lit), so that the lifting rod 43 rises slowly. When the connecting plate 471 loses its extrusion, the resistance-increasing mechanism 47 is reset under the action of the spring 2 472.

[0044] See also Figure 6 and Figure 8As shown, the plug-in mechanism 48 includes an extrusion block 481, a ring 482, a plug-in plate 483, a telescopic sleeve 484, a limiting ring 485, a plug-in port 486, a rubber ring 487 and a spring three 488. An extrusion block 481 that can slide left and right is provided at the inner side of the sliding groove. The inner side surface of the extrusion block 481 is an inclined surface that gradually increases from left to right. The extrusion block 481 is elastically connected to the sliding groove. A ring 482 that can slide up and down is provided in the through groove. The ring 482 and the plug-in plate 483 are connected by a telescopic sleeve 484. A spring three 488 is connected between the plug-in plate 483 and the support plate 31. The through groove A limit ring 485 is fixedly installed on the inner wall, and the limit ring 485 prevents the air pressure from pushing the ring 482 out of the through groove when the inside of the LCD screen is inflated. The limit ring 485 is located between the ring 482 and the plug-in board 483 to limit the ring 482. The plug-in board 483 is fixedly installed with symmetrical plug-in ports 486, and the plug-in board 483 is fixedly installed with a rubber ring 487. The rubber ring 487 can prevent damage to the LCD screen when the plug-in port 486 is plugged in with the interface of the LCD screen, and forms a sealed state when the plug-in port 486 is plugged in with the interface of the LCD screen, so as to prevent air leakage at the plug-in point from affecting the detection result.

[0045] In the above technical solution, when the slide bar 42 moves to the innermost part, the slide bar 42 squeezes the squeezing block 481 to move inward, the inclined surface of the squeezing block 481 squeezes the ring 482 to move upward, the plug plate 483 and the telescopic sleeve 484 follow the movement, and the upwardly moving plug plate 483 drives the plug interface 486 to gradually plug the interface of the LCD screen, and the inflation starts. When the internal air pressure of the LCD screen, the inner tube 24 and the outer tube 23 reaches a certain value, the air pressure will open the telescopic sleeve 484, and the plug plate 483 will bring The liquid crystal display screen rises. Since the lower end surface of the liquid crystal display screen is adsorbed and fixed by the vacuum suction cup 44, the liquid crystal display screen drives the lifting rod 43 to move upward through the vacuum suction cup 44. The lifting rod 43 moving upward slowly rises under the speed limit of the resistance plate 473. When the lifting rod 43 rises to the highest position, the prompt mechanism 49 lights up and the first air tightness test is qualified. The second air tightness test is continued. When the test is completed, the inflation stops, and under the action of spring three 488, the various mechanisms of the plug-in mechanism 48 are reset.

[0046] See also Figure 6 and Figure 7 As shown, the prompt mechanism 49 includes an insulating cover 491, a battery pack 492, a prompt light 493, a conductive member 494 and a conductive sheet 495. The insulating cover 491 is fixedly mounted on the lower side of the support plate 31. The battery pack 492 and the prompt light 493 built into the insulating cover 491 are electrically connected to the conductive member 494 on the side wall of the slide bar 42. The number of the conductive members 494 is two. A conductive sheet 495 is provided at the bottom of the outer wall of the lifting rod 43. The positions of the conductive member 494 and the conductive sheet 495 correspond to each other.

[0047] In the above technical scheme, during the first air tightness test, the plug-in board 483 of Kia moves upward, driving the LCD screen to move upward. Since the vacuum suction cup 44 on the lifting rod 43 adsorbs and fixes the LCD screen, the LCD screen drives the lifting rod 43 to move upward through the vacuum suction cup 44. When the lifting rod 43 slowly rises to the highest position under the action of resistance, the conductive sheet 495 contacts the two conductive parts 494, thereby forming a passage between the battery pack 492 built into the insulating cover 491, the warning light 493 and the conductive part 494 on the side wall of the sliding rod 42. The warning light 493 lights up and the LCD screen is detected to be intact.

[0048] See also Figure 5 and Fig.10 As shown, the pressing assembly 5 includes an electric push rod 2 51, a pressing frame 52, a fixed plate 53, an electric push rod 3 54, a pressing plate 55 and a pressing mechanism 56. The electric push rod 2 51 is connected between the frame 11 and the pressing frame 52, the electric push rod 3 54 is connected between the pressing frame 52 and the fixed plate 53, the pressing plate 55 is fixedly installed on the output end of the electric push rod 3 54, and the pressing mechanism 56 is symmetrically arranged on the fixed plate 53.

[0049] See also Figure 5 and Fig.10 As shown, the pressing mechanism 56 includes a rack plate 1 561, a mounting frame 562, a fixing rod 563, a gear 564, an extrusion frame 565 and a rack plate 2 566. The rack plate 1 561 is fixedly installed on the outer surface of the pressing plate 55, and a symmetrical mounting frame 562 is fixedly installed on the fixing plate 53. A fixing rod 563 is fixedly installed between the mounting frames 562, and a gear 564 is installed on the fixing rod 563. An extrusion frame 565 that can slide up and down is arranged on the outer side of the fixing plate 53. When the pressing plate 55 limits the position of the liquid crystal display screen, the lower end surface of the extrusion frame 565 will not contact the support plate 31. A rack plate 2 566 is fixedly installed on the extrusion frame 565, and the rack plate 1 561 and the rack plate 2 566 are meshed through the gear 564.

[0050] In the above technical solution, when the LCD screen is placed on the support plate 31, the electric push rod 2 51 drives the pressing frame 52 to move downward to the position of the LCD screen, and the electric push rod 3 54 drives the pressing plate 55 to move downward to limit the position of the LCD screen to ensure that the plug interface 486 and the LCD screen plug interface will not be offset when plugged in. The pressing plate 55 moving downward drives the rack plate 1 561 to move downward, and the rack plate 2 566 meshing with the rack plate 1 561 and the gear 564 drives the squeezing frame 565 to move upward. After the vacuum suction cup 44 adsorbs and fixes the LCD screen, the electric push rod 3 54 drives the pressing plate 55 to move upward, and the pressing plate 55 moving upward drives the rack plate 1 561 to move upward, and the rack plate 1 561 and the gear 564 are meshed. The meshing rack plate 566 drives the extrusion frame 565 to move downward, and the pressing plate 55 stops pressing the LCD screen. After completing the first LCD screen detection, a second air tightness test is performed. The electric push rod 51 drives the fixed plate 53 to move downward through the pressing frame 52, and the extrusion frame 565 follows the movement. The extrusion frame 565 squeezes the support plate 31. If the support plate 31 does not descend (the descent of the support plate 31 can be detected by the height of the ultrasonic sensor in the prior art. The ultrasonic sensor can be installed on the inner wall of the protective cover 21. The ultrasonic sensor uses ultrasonic waves to measure distances or detect objects to observe whether the support assembly 3 descends), it means that the second air tightness test has passed and the LCD screen has passed the test.

[0051] Working principle:

[0052] Step 1: The clamping mechanism 32 is used to limit the periphery of the LCD screen placed therein, and the LCD display is placed above the support plate 31. The placed LCD screen presses down the plug-in component 4 under the action of its gravity. The plug-in component 4 rises after being pressed so as to align with the interface of the LCD screen for plugging. The plug-in component 4 adsorbs and fixes the lower end surface of the LCD screen. During the plugging process, the upper side of the LCD screen is limited by the pressing plate 55, and the plugging is completed;

[0053] Step 2: Perform two air tightness tests on the LCD screen. The specific steps are as follows:

[0054] a. Connect the lower end of the inflatable component 2 with an external air pump, inflate the inside of the LCD screen with gas through the air pump, and observe the light of the plug-in component 4. If the light of the plug-in component 4 is not on, it means that there is a leak in the LCD screen. Otherwise, it means that the first air tightness test is qualified, and the second air tightness test is continued;

[0055] b. Press the support plate 31 through the extrusion frame 565 to observe whether the support plate 31 drops and the warning mechanism 26 does not light up, which means that the second test of the LCD screen has passed and the LCD screen is airtight;

[0056] Step 3: When the results of the two air tightness tests are qualified, it means that the air tightness is good, and the LCD screen is transported to the next station.

[0057] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A detection tool for the production of LED liquid crystal display screens, characterized in that: include: A bracket (1) having a frame (11) fixedly mounted on its upper portion, wherein the frame (11) is a U-shaped structure; An inflatable component (2) is fixedly mounted on the bracket (1), and the inflatable component (2) is used to inflate the interior of the liquid crystal display screen when performing air tightness testing on the liquid crystal display screen; A support component (3), the upper part of which is fixedly mounted inside the upper end of the inflatable component (2), and the support component (3) is used to support and position the liquid crystal display screen; A plug-in assembly (4), a symmetrical plug-in assembly (4) is fixedly mounted on the support assembly (3), and the plug-in assembly (4) is used to plug the inflation port of the liquid crystal display screen whose position has been adjusted on the support assembly (3); The pressing component (5) is fixedly mounted on the upper side of the interior of the frame (11). The pressing component (5) is used to provide pressure when performing position limiting and air tightness testing on the liquid crystal display screen.

2. The detection tooling for LED liquid crystal display production according to claim 1 is characterized in that: The inflation assembly (2) comprises a protective cover (21), a mounting plate (22), an outer sleeve (23), an inner sleeve (24), a tension spring (25) and a warning mechanism (26); the upper portion of the protective cover (21) is fixedly mounted on the bracket (1); the mounting plates (22) are fixedly mounted on the front and rear inner side walls of the protective cover (21); the outer sleeve (23) is fixedly mounted between the mounting plates (22); the inner sleeve (24) is arranged inside the outer sleeve (23) and is slidable up and down; the tension spring (25) is connected between the inner sleeve (24) and the outer sleeve; the warning mechanism (26) is fixedly mounted on the lower portion of the outer sleeve; the lower portion of the outer sleeve is provided with an air inlet, and the air inlet is communicated with the inside of the outer sleeve (23) and the inner sleeve (24).

3. The detection tooling for LED liquid crystal display production according to claim 2 is characterized in that: The warning mechanism (26) comprises a positive coil (261), a negative coil (262), a warning light (263), a sleeve (264) and a gravity ring (265); the positive coil (261) and the negative coil (262) are fixedly mounted on the inner wall of the outer sleeve; the warning light (263) is fixedly mounted on the outside of the outer sleeve; the warning light (263) with a built-in power source is electrically connected to the positive coil (261) and the negative coil (262); the sleeve (264) is fixedly mounted on the upper end of the outer sleeve (23); and a gravity ring (265) that can slide up and down is arranged inside the sleeve (264).

4. The detection tooling for LED liquid crystal display production according to claim 2 is characterized in that: The support assembly (3) comprises a support plate (31) and a clamping mechanism (32); the support plate (31) is fixedly mounted on the upper end of the inner cylinder (24); a through groove is formed on the support plate (31), the through groove is communicated with the inner cavity of the inner cylinder (24); and the clamping mechanism (32) is fixedly mounted on the four inner side walls of the protective cover (21); The clamping mechanism (32) comprises an electric push rod (321) and a push plate (322); the electric push rod (321) is fixedly mounted on the inner wall of the protective cover (21); and the push plate (322) is fixedly mounted on the output end of the electric push rod (321).

5. The detection tooling for LED liquid crystal display production according to claim 4 is characterized in that: The plug-in assembly (4) comprises an inclined groove (41), a sliding rod (42), a lifting rod (43), a vacuum suction cup (44), a spring (46), a resistance increasing mechanism (47), a plug-in mechanism (48) and a prompting mechanism (49). The support plate (31) is provided with a sliding groove, and a symmetrical inclined groove (41) is provided on the inner side wall of the sliding groove. The inclined groove (41) is a structure that gradually extends upward from the inside to the outside. A slidable sliding block (1) is provided in the inclined groove (41), and an elastic connection is formed between the sliding block (1) and the inclined groove (41). A slide bar (42) is connected between the slide blocks, a lifting slot is provided on the slide bar (42), a lifting rod (43) which can slide up and down is arranged in the lifting slot, a vacuum suction cup (44) is fixedly installed on the upper end of the lifting rod (43), a spring (46) is connected between the lower end of the lifting rod (43) and the lifting slot, a resistance increasing mechanism (47) which can slide left and right is arranged at the side wall position of the slide bar (42), a plug-in mechanism (48) which can slide up and down is arranged in the through slot, and a prompt mechanism (49) is fixedly installed on the support plate (31).

6. The detection tooling for LED liquid crystal display production according to claim 5, characterized in that: The resistance increasing mechanism (47) comprises a connecting plate (471), a second spring (472) and a resistance increasing plate (473); a connecting plate (471) which can slide left and right is arranged on the side wall of the slide bar (42); a second spring (472) is connected between the connecting plate (471) and the resistance increasing groove; a resistance increasing plate (473) is fixedly mounted on the connecting plate (471); the resistance increasing plate (473) is made of rubber material; a sawtooth groove is provided on the lifting rod (43); and a sawtooth block matching the sawtooth groove is provided on the outer end surface of the resistance increasing plate (473).

7. The detection tooling for LED liquid crystal display production according to claim 6, characterized in that: The plug-in mechanism (48) comprises an extrusion block (481), a circular ring (482), a plug-in plate (483), a telescopic sleeve (484), a limiting ring (485), an insertion port (486), a rubber ring (487) and a spring (488). An extrusion block (481) capable of sliding left and right is arranged at the inner side of the sliding groove. The inner side surface of the extrusion block (481) is an inclined surface gradually inclined upward from left to right. The extrusion block (481) and the sliding groove are elastically connected. A circular ring (482) that can slide up and down is arranged in the through groove, the circular ring (482) and the plug plate (483) are connected through a telescopic sleeve (484), a spring three (488) is connected between the plug plate (483) and the support plate (31), a limit ring (485) is fixedly installed on the inner side wall of the through groove, a symmetrical plug interface (486) is fixedly installed on the plug plate (483), and a rubber ring (487) is fixedly installed on the plug plate (483).

8. The detection tooling for LED liquid crystal display production according to claim 6 is characterized by: The prompt mechanism (49) comprises an insulating cover (491), a battery pack (492), a prompt light (493), a conductive member (494) and a conductive sheet (495); the insulating cover (491) is fixedly mounted on the lower side of the support plate (31); the battery pack (492) and the prompt light (493) built into the insulating cover (491) are electrically connected to the conductive member (494) on the side wall of the slide bar (42); a conductive sheet (495) is provided at the bottom of the outer side wall of the lifting rod (43); and the positions of the conductive member (494) and the conductive sheet (495) correspond to each other.

9. The detection tooling for LED liquid crystal display production according to claim 1, characterized in that: The pressing assembly (5) comprises an electric push rod 2 (51), a pressing frame (52), a fixing plate (53), an electric push rod 3 (54), a pressing plate (55) and a pressing mechanism (56); the electric push rod 2 (51) is connected between the frame (11) and the pressing frame (52); the electric push rod 3 (54) is connected between the pressing frame (52) and the fixing plate (53); the pressing plate (55) is fixedly mounted on the output end of the electric push rod 3 (54); and the pressing mechanism (56) is symmetrically arranged on the fixing plate (53).

10. The detection tooling for LED liquid crystal display production according to claim 9, characterized in that: The pressing mechanism (56) comprises a rack plate 1 (561), a mounting frame (562), a fixed rod (563), a gear (564), an extrusion frame (565) and a rack plate 2 (566); the rack plate 1 (561) is fixedly mounted on the outer surface of the pressing plate (55); a symmetrical mounting frame (562) is fixedly mounted on the fixing plate (53); a fixed rod (563) is fixedly mounted between the mounting frames (562); a gear (564) is mounted on the fixing rod (563); an extrusion frame (565) that can slide up and down is arranged on the outer side of the fixing plate (53); a rack plate 2 (566) is fixedly mounted on the extrusion frame (565); the rack plate 1 (561) and the rack plate 2 (566) are meshed with each other through the gear (564).

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