Backlight film tearing structure and method of full-automatic backlight assembling machine

Abstract

The backlight film tearing structure comprises a film tearing mechanism, the film tearing mechanism comprises a first film tearing assembly and a second film tearing assembly, and the top of the first film tearing assembly and the top of the second film tearing assembly are fixedly connected with a fixing frame; the first film tearing assembly comprises a first plate body, the bottom of the first plate body is fixedly connected with a first air cylinder, a piston rod of the first air cylinder is fixedly connected with a first lifting seat, the interior of the first lifting seat is rotationally connected with a first rotating frame, and the interior of the first rotating frame is rotationally connected with a film tearing roller. The technical problems that in the using process of an existing backlight film tearing structure of the full-automatic backlight assembling machine, the probability that mechanical damage is generated on the surface of a backlight module is inconvenient to reduce, and the yield in the assembling process of the backlight module is reduced are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fully automatic backlight assembly machines, in particular to a backlight film tearing structure and method for a fully automatic backlight assembly machine. Background Art

[0002] The backlight film tearing structure of a fully automatic backlight assembly machine is a key automation component designed to efficiently and precisely remove the protective film on the surface of backlight module components. Automatically tearing the protective film on the surface of the optical film material to avoid the display effect being affected by contamination or scratches. By precisely mechanically adjusting the accuracy of the film tearing position, angle, and force, residual or tearing can be prevented.

[0003] A backlight film tearing mechanism of a fully automatic backlight assembly machine with Chinese Patent Publication No. CN104149477A includes a film tearing unit that completes the film tearing action. The film tearing unit includes an inclined cylinder fixed to an adjustable substrate assembly. The action end below the inclined cylinder is connected to a third vertical plate. A third cylinder with vertical movement is arranged on the third vertical plate. The lower action end of the third cylinder is provided with a fourth cylinder with horizontal movement through a fourth vertical plate. The front action end of the fourth cylinder is provided with a fifth cylinder with vertical movement through a fifth vertical plate. The two push-pull action components of the fifth cylinder are respectively connected to the upper and lower claw bodies for grasping the backlight film sticking handle. This film tearing mechanism drives the clamping claws through cylinders and uses the clamping claws to tear the protective film. The clamping claws need to directly contact the edge of the film material, which is likely to cause scratches on the backlight module.

[0004] During the use of the existing backlight film tearing structure of a fully automatic backlight assembly machine, it is not convenient to reduce the probability of mechanical damage on the surface of the backlight module, resulting in a reduction in the yield rate during the assembly process of the backlight module. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that during the use of the existing backlight film tearing structure of a fully automatic backlight assembly machine, it is not convenient to reduce the probability of mechanical damage on the surface of the backlight module, resulting in a reduction in the yield rate during the assembly process of the backlight module.

[0006] To solve the above technical problem, the present invention provides the following technical solution: A backlight film tearing structure for a fully automatic backlight assembly machine, including a film tearing mechanism. The film tearing mechanism includes a first film tearing assembly and a second film tearing assembly. A fixed frame is fixedly connected to the tops of the first film tearing assembly and the second film tearing assembly. The first film tearing assembly includes a first plate body. A first cylinder is fixedly connected to the bottom of the first plate body. The piston rod of the first cylinder is fixedly connected to a first lifting seat. A first rotating frame is rotatably connected inside the first lifting seat. A film tearing roller is rotatably connected inside the first rotating frame. The second film tearing assembly includes a second plate body. A second air cylinder is fixedly connected to the bottom of the second plate body. The piston rod of the second air cylinder is fixedly connected to a second lifting seat. A second rotating frame is rotatably connected inside the second lifting seat. An installation seat is rotatably connected inside the second rotating frame. An air film generating module is fixedly connected to one side of the installation seat.

[0007] As a preferred embodiment of the backlight film tearing structure of the full-automatic backlight assembly machine according to the present invention, wherein: a first motor is fixedly connected to one side of the first lifting seat. The output shaft of the first motor is fixedly connected to the first rotating frame. A second motor is fixedly connected to one side of the first rotating frame. The output shaft of the second motor is fixedly connected to the film tearing roller.

[0008] As a preferred embodiment of the backlight film tearing structure of the full-automatic backlight assembly machine according to the present invention, wherein: a first sliding rod is fixedly connected to the top of the first lifting seat. The first sliding rod penetrates through the top of the first plate body and is movably connected thereto.

[0009] As a preferred embodiment of the backlight film tearing structure of the full-automatic backlight assembly machine according to the present invention, wherein: a bent pipe is fixedly connected inside the installation seat. The air outlet end of the bent pipe is communicated with the air inlet end of the air film generating module. The air inlet end of the bent pipe is communicated with an air inlet solenoid valve. The air inlet end of the air inlet solenoid valve is communicated with a hose.

[0010] As a preferred embodiment of the backlight film tearing structure of the full-automatic backlight assembly machine according to the present invention, wherein: a third motor is fixedly connected to one side of the second lifting seat. The output shaft of the third motor is fixedly connected to the second rotating frame. A fourth motor is fixedly connected to one side of the second rotating frame. The output shaft of the fourth motor is fixedly connected to the installation seat.

[0011] As a preferred embodiment of the backlight film tearing structure of the full-automatic backlight assembly machine according to the present invention, wherein: a second sliding rod is fixedly connected to the top of the second lifting seat. The second sliding rod penetrates through the top of the second plate body and is movably connected thereto.

[0012] As a preferred embodiment of the backlight film tearing structure of the full-automatic backlight assembly machine according to the present invention, wherein: it further includes a fixing mechanism and a moving mechanism. The fixing mechanism is located at the bottom of the film tearing mechanism. The moving mechanism is located at the top of the film tearing mechanism and is fixedly connected thereto. The moving mechanism is fixedly installed at the rear side of the fixing mechanism.

[0013] As a preferred embodiment of the backlight film tearing structure of the full-automatic backlight assembly machine according to the present invention, wherein: the fixing mechanism includes a placement frame. Support rods are fixedly connected to the four corners of the bottom of the placement frame. A base is fixedly connected to the bottom of the support rods. A support frame is fixedly connected to the top of the base. A vacuum suction cup assembly is fixedly installed at the center of the top of the support frame. A plurality of suction cups are communicated with the top of the vacuum suction cup assembly.

[0014] As a preferred embodiment of the backlight film tearing structure of the fully automatic backlight assembly machine of the present invention, the following is provided: The moving mechanism includes a frame body fixedly connected to the placement frame. A lead screw is rotatably connected to the top inside the frame body. A nut sleeve is threadedly sleeved on the surface of the lead screw. The nut sleeve is fixedly installed on the top of the fixed frame. A sliding sleeve is fixedly connected to the top of the nut sleeve. A limiting rod is slidably connected inside the sliding sleeve. The limiting rod is fixedly installed on the top inside the frame body. A fifth motor is fixedly connected to one side of the frame body. The output shaft of the fifth motor is fixedly connected to one end of the lead screw.

[0015] A method for tearing the backlight film of a fully automatic backlight assembly machine includes the following steps: S1. The backlight module is grabbed onto the fixing mechanism by a robotic arm, and the backlight module is adsorbed and fixed by the fixing mechanism. S2. The edge of the protective film or the positioning mark is captured through the vision positioning module and image recognition technology, and the starting position and peeling direction of the protective film are calculated. S3. The moving mechanism drives the film tearing mechanism to move to the starting film tearing position, and then the first film tearing assembly and the second film tearing assembly of the film tearing mechanism are adjusted to the starting position on one side of the backlight module and the protective film. S4. The first film tearing assembly works on the top of the protective film. The film tearing roller of the first film tearing assembly rotates on the top of the protective film, driving one side of the protective film to bend upward, so that it separates from the backlight module. S5. The air film generating module of the second film tearing assembly moves to the opposite side of the backlight module and the protective film. Nitrogen is injected into the air film generating module. The air film generating module sprays out a narrow air film, and the air film impacts the connection between the backlight module and the protective film to tear the protective film, avoiding mechanical damage to the backlight module. S6. After the second film tearing assembly works stably, the first film tearing assembly is reset. Then, the protective film drives the film tearing mechanism to move, so that the second film tearing assembly continues to move for film tearing. When the film tearing reaches the final position, the film tearing roller is attached to the protective film, and the film tearing roller is controlled to reverse, sliding the protective film out from the top of the backlight module. S7. After removing the protective film, the fixing mechanism, the moving mechanism, and the film tearing mechanism are reset. The torn backlight module is taken out by a robotic arm for subsequent assembly.

[0016] The beneficial effects of the present invention: 1. By the combined use of the mechanical winding of the film tearing roller and the non-contact separation of the air-floating peeling module, combined with multi-degree-of-freedom motion control and clean gas assistance, the present invention significantly improves the accuracy, efficiency and yield of film tearing for the backlight module. The air film generation module sprays nitrogen to form an air film, separating the protective film from the backlight module in a non-contact manner, avoiding scratches, indentations or electrostatic adsorption contamination caused by traditional clamping jaws or suction cups. The film tearing roller only contacts the non-functional surface of the protective film and winds it up through friction without contacting the surface of the backlight module. The first motor drives the first rotating frame to rotate to adjust the angle of the film tearing roller to adapt to the peeling trajectories of different adhesiveness protective films. The second motor controls the rotation speed of the film tearing roller and matches the peeling speed through friction to prevent tearing or residue. The third motor and the fourth motor cooperate to adjust the spatial angle of the air film generation module to ensure that the air film spraying direction is always perpendicular to the protective film peeling interface, improving the air-floating peeling efficiency. The second cylinder and the second sliding rod realize the height adjustment of the air film generation module to adapt to different thickness film materials. The film tearing roller and the air film generation module operate synchronously, and the air-floating separation and mechanical winding are seamlessly connected, reducing the single film tearing cycle.

[0017] 2. Through the innovative combination of the flexible contact of the friction head, the dynamic pressure regulation of the support airbag and the pull belt reset mechanism, the present invention realizes high precision, low damage and strong adaptability in the film tearing process. When the friction head contacts the protective film, it disperses the local pressure through its own deformation, avoiding scratching the film material or the surface of the backlight module. The internal pressure of the airbag is adjustable, and the contact force of the friction head on the protective film is controlled by the air pressure change to adapt to different adhesiveness protective films. When the friction head disengages from the film material, the nylon pull belt assists the airbag to reset.

[0018] 3. Through the sticky adaptive air flow switching, closed-loop wind speed control and diversion structure optimization, the air-floating film tearing technology of the present invention can be applied in the fields of high adhesiveness, ultra-thin and special-shaped film materials, expanding the application range of air-floating peeling. The three-way solenoid valve switches to the side air nozzle, concentrating the air flow and spraying it directly onto the bonding interface between the protective film and the backlight module to form a high-pressure air wedge, directly impacting the adhesive layer to weaken the adhesive force. The air flow switches to the upper air nozzle to lift the protective film upward with a low-pressure laminar flow, realizing non-contact turning and peeling through pneumatic lift, avoiding the stretching deformation of the film material caused by mechanical contact. The wind speed sensor monitors the air flow speed in real time and cooperates with the PID algorithm to dynamically adjust the opening of the wind speed regulating valve to ensure the stability of the air film. When peeling the UTG ultra-thin glass protective film, the wind speed is accurately controlled at 12 ± 0.5 m / s to prevent micro-cracks from occurring on the glass due to the impact of the air flow. The side air outlet net adopts a honeycomb-shaped diversion structure to convert the turbulent flow of the side air nozzle into a uniform laminar flow, expanding the coverage width of the air wedge and improving the peeling efficiency of high adhesiveness films. The upper air outlet net is a tapered slit structure to accelerate the air flow to form a high-speed air curtain, realizing the smooth turning of the protective film. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention; Figure 2Schematic diagram of the film tearing mechanism of the present invention Figure 1 ; Figure 3 Schematic diagram of the film tearing mechanism of the present invention Figure 2 ; Figure 4 Schematic diagram of the first film tearing component of the present invention; Figure 5 Schematic diagram of the second film tearing component of the present invention; Figure 6 Schematic diagram of the fixing mechanism of the present invention; Figure 7 Schematic diagram of the moving mechanism of the present invention; Figure 8 Schematic diagram of the working state of the film tearing roller and the air film generation module of the present invention; Figure 9 Partial cross-sectional view of the film tearing roller of the present invention; Figure 10 Cross-sectional view of the air film generation module of the present invention.

[0020] In the figure: 100, film tearing mechanism; 200, fixing mechanism; 300, moving mechanism; 400, backlight module; 500, protective film; 101, first film tearing component; 102, second film tearing component; 103, fixing frame; 104, first plate body; 105, first cylinder; 106, first motor; 107, second motor; 108, first rotating frame; 109, first lifting seat; 110, film tearing roller; 111, first sliding rod; 112, second plate body; 113, second cylinder; 114, second lifting seat; 115, third motor; 116, fourth motor; 117, intake solenoid valve; 118, elbow pipe; 119, air film generation module; 120, mounting seat; 121, second rotating frame; 122, hose; 123, second sliding rod; 124, roller body; 125, friction sleeve; 126, mounting groove; 127, friction head; 128, support airbag; 129, pulling belt; 130, hollow flat nozzle; 131, air velocity regulating valve; 132, air velocity sensor; 133, upper air nozzle; 134, upper air outlet net; 135, side air outlet net; 136, side air nozzle; 137, three-way solenoid valve; 138, air outlet nozzle head; 201, placement frame; 202, suction cup; 203, vacuum suction cup assembly; 204, support frame; 205, base; 206, support rod; 301, frame body; 302, lead screw; 303, fifth motor; 304, nut sleeve; 305, sliding sleeve; 306, limiting rod. Detailed implementation manners

[0021] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given in conjunction with the accompanying drawings of the specification.

[0022] Embodiment 1, as shown in Figures 1-10 shown, this embodiment provides a backlight film tearing structure for a fully automatic backlight assembly machine, including a film tearing mechanism 100, the film tearing mechanism 100 includes a first film tearing assembly 101 and a second film tearing assembly 102, and a fixing frame 103 is fixedly connected to the tops of the first film tearing assembly 101 and the second film tearing assembly 102.

[0023] Furthermore, the first film tearing assembly 101 includes a first plate body 104, a first air cylinder 105 is fixedly connected to the bottom of the first plate body 104, a piston rod of the first air cylinder 105 is fixedly connected to a first lifting seat 109, a first rotating frame 108 is rotatably connected inside the first lifting seat 109, and a film tearing roller 110 is rotatably connected inside the first rotating frame 108.

[0024] Furthermore, a first motor 106 is fixedly connected to one side of the first lifting seat 109, an output shaft of the first motor 106 is fixedly connected to the first rotating frame 108, a second motor 107 is fixedly connected to one side of the first rotating frame 108, and an output shaft of the second motor 107 is fixedly connected to the film tearing roller 110.

[0025] Furthermore, a first sliding rod 111 is fixedly connected to the top of the first lifting seat 109, and the first sliding rod 111 penetrates to the top of the first plate body 104 and is movably connected thereto.

[0026] Furthermore, the second film tearing assembly 102 includes a second plate body 112, a second air cylinder 113 is fixedly connected to the bottom of the second plate body 112, a piston rod of the second air cylinder 113 is fixedly connected to a second lifting seat 114, a second rotating frame 121 is rotatably connected inside the second lifting seat 114, a mounting seat 120 is rotatably connected inside the second rotating frame 121, and an air film generating module 119 is fixedly connected to one side of the mounting seat 120.

[0027] Furthermore, a bent pipe 118 is fixedly connected inside the mounting seat 120, an air outlet end of the bent pipe 118 is communicated with an air inlet end of the air film generating module 119, an air inlet end of the bent pipe 118 is communicated with an intake solenoid valve 117, and an air inlet end of the intake solenoid valve 117 is communicated with a hose 122.

[0028] Furthermore, a third motor 115 is fixedly connected to one side of the second lifting seat 114, an output shaft of the third motor 115 is fixedly connected to the second rotating frame 121, a fourth motor 116 is fixedly connected to one side of the second rotating frame 121, and an output shaft of the fourth motor 116 is fixedly connected to the mounting seat 120.

[0029] Furthermore, a second sliding rod 123 is fixedly connected to the top of the second lifting seat 114, and the second sliding rod 123 penetrates to the top of the second plate body 112 and is movably connected thereto.

[0030] During the operation of the film tearing mechanism 100, the protective film 500 is torn by the combined use of the first film tearing component 101 and the second film tearing component 102. During the operation of the first film tearing component 101, the first cylinder 105 drives the first lifting seat 109 to move up and down. During the movement of the first lifting seat 109, the first sliding rod 111 is driven to slide inside the first plate body 104 to limit the first lifting seat 109 and make it lift stably. The output shaft of the first motor 106 drives the first rotating frame 108 to rotate inside the inner wall of the first lifting seat 109, changing the angle of the film tearing roller 110 so that it can fit on the top of the protective film 500. During the operation of the film tearing roller 110, the second motor 107 drives it to rotate, making it drive the protective film 500 to bend and deform through friction. During the operation of the second film tearing component 102, the second cylinder 113 drives the second lifting seat 114 to move up and down to adjust the height of the air film generating module 119. The second sliding rod 123 limits the second lifting seat 114 to make it lift stably. The output shaft of the third motor 115 drives the second rotating frame 121 to rotate, and the output shaft of the fourth motor 116 drives the mounting seat 120 to rotate to adjust the angle of the air film generating module 119 so that it can be located on the side opposite to the backlight module 400 and the protective film 500, and keep the air film generating module 119 suspended above the backlight module 400 without contacting it. The inlet end of the hose 122 is connected to a nitrogen cylinder. Nitrogen enters the elbow 118 through the hose 122 and the inlet solenoid valve 117, and enters the air film generating module 119 through the elbow 118. The air film generating module 119 ejects a long and narrow air film to tear the protective film 500.

[0031] Furthermore, it also includes a visual positioning module. The visual positioning module includes a high-resolution industrial camera and a laser range finder. The high-resolution industrial camera captures the edge of the protective film 500 or the positioning mark through image recognition technology, accurately calculates the starting position and peeling direction of the protective film 500, and the laser range finder assists in detecting the flatness of the surface of the protective film 500 to avoid film tearing deviation caused by warping.

[0032] Furthermore, it also includes a fixing mechanism 200 and a moving mechanism 300. The fixing mechanism 200 is located at the bottom of the film tearing mechanism 100, and the moving mechanism 300 is located at the top of the film tearing mechanism 100 and is fixedly connected to it. The moving mechanism 300 is fixedly installed at the rear side of the fixing mechanism 200.

[0033] Furthermore, the fixing mechanism 200 includes a placement frame 201. Four corners of the bottom of the placement frame 201 are fixedly connected with support rods 206. The bottom of the support rods 206 is fixedly connected with a base 205. The top of the base 205 is fixedly connected with a support frame 204. The center of the top of the support frame 204 is fixedly installed with a vacuum suction cup assembly 203, and a plurality of suction cups 202 are connected to the top of the vacuum suction cup assembly 203.

[0034] The backlight module 400 is movably installed in the inner cavity of the placement frame 201. The top of the suction cup 202 is connected to the bottom of the backlight module 400 to adsorb and fix it.

[0035] Furthermore, the vacuum suction cup assembly 203 is connected to the solenoid valve through the air hole. The solenoid valve is connected to the air pump. The air pump extracts the air inside the suction cup 202 through the solenoid valve to generate negative pressure inside it, so as to adsorb and fix the backlight module 400. When it is necessary to release the backlight module 400, the solenoid valve is connected to the outside air to allow the air to enter the suction cup 202.

[0036] During the operation of the fixing mechanism 200, the backlight module 400 is placed in the placement frame 201. The placement frame 201 limits the backlight module 400 to prevent it from shaking. The vacuum suction cup assembly 203 and the suction cup 202 are located at the bottom of the backlight module 400 to perform vacuum adsorption on it to prevent it from moving upward during the film tearing process.

[0037] Furthermore, the moving mechanism 300 includes a frame body 301. The frame body 301 is fixedly connected to the placement frame 201. A lead screw 302 is rotatably connected to the inner top of the frame body 301. A nut sleeve 304 is sleeved on the surface of the lead screw 302. The nut sleeve 304 is fixedly installed on the top of the fixing frame 103. The top of the nut sleeve 304 is fixedly connected to a sliding sleeve 305. A limiting rod 306 is slidably connected inside the sliding sleeve 305. The limiting rod 306 is fixedly installed on the inner top of the frame body 301. A fifth motor 303 is fixedly connected to one side of the frame body 301. The output shaft of the fifth motor 303 is fixedly connected to one end of the lead screw 302.

[0038] During the operation of the moving mechanism 300, the output shaft of the fifth motor 303 drives the lead screw 302 to rotate. The lead screw 302 drives the nut sleeve 304 to move left and right. During the movement of the nut sleeve 304, it drives the sliding sleeve 305 and the fixing frame 103 to move synchronously. The sliding sleeve 305 slides on the surface of the limiting rod 306 to limit the nut sleeve 304 to prevent it from rotating. The fixing frame 103 drives the first film tearing assembly 101 and the second film tearing assembly 102 to move to change its film tearing position so that it can complete the film tearing stroke.

[0039] Furthermore, the film tearing roller 110 includes a roller body 124 and a friction sleeve 125. The roller body 124 is located inside the first lifting seat 109 and is rotatably connected to it. The output shaft of the second motor 107 is fixedly connected to one end of 214. The friction sleeve 125 is fixedly sleeved on the surface of 214.

[0040] Further, an installation groove 126 is formed around the surface of the friction sleeve 125. One side of the inner wall of the installation groove 126 is fixedly connected with a friction head 127, and the other side of the inner wall of the installation groove 126 is fixedly connected with a support airbag 128. The surface of the support airbag 128 is movably connected with the surface of the friction head 127. The inner cavity of the support airbag 128 is filled with compressed air. A pulling belt 129 is fixedly connected to the inner cavity of the support airbag 128. The number of the pulling belts 129 is several and they are evenly distributed in the inner cavity of the support airbag 128.

[0041] During the rotation of the roller body 124, the friction sleeve 125 is synchronously driven to rotate. The friction head 127 on the surface of the friction sleeve 125 contacts the top of the protective film 500, and drives it to bend upward through friction. During the contact between the friction head 127 and the protective film 500, the support airbag 128 is extruded, so that the friction head 127 can be deformed to avoid damaging the backlight module 400. When the friction head 127 disengages from the surface of the protective film 500, the pulling belt 129 drives the support airbag 128 to reset, and the support airbag 128 drives the friction head 127 to reset. Through the cooperation of the friction sleeve 125 and several friction heads 127, the protective film 500 is driven to bend upward to tear the film, so as to assist the hollow flat nozzle 130 to insert into the side opposite to the backlight module 400 and the protective film 500.

[0042] Further, the air film generation module 119 includes a hollow flat nozzle 130. A wind speed regulating valve 131 is fixedly installed on the left side of the inner cavity of the hollow flat nozzle 130. The air inlet end of the wind speed regulating valve 131 is communicated with the elbow 118. A wind speed sensor 132 is fixedly installed in the middle of the inner cavity of the hollow flat nozzle 130. The air outlet end of the wind speed regulating valve 131 is communicated with the air inlet end of the wind speed sensor 132. The top of the hollow flat nozzle 130 is fixedly connected with an air outlet nozzle head 138. A three-way solenoid valve 137 is fixedly installed inside the air outlet nozzle head 138. The air inlet end of the three-way solenoid valve 137 penetrates into the inner cavity of the hollow flat nozzle 130. The first air outlet end of the three-way solenoid valve 137 is communicated with a side air nozzle 136. The second air outlet end of the three-way solenoid valve 137 is communicated with an upper air nozzle 133. The top of the air outlet nozzle head 138 is fixedly connected with an upper air outlet net 134. The upper air nozzle 133 is located inside the upper air outlet net 134. The right side of the air outlet nozzle head 138 is fixedly connected with a side air outlet net 135. The side air nozzle 136 is located inside the side air outlet net 135.

[0043] During the operation of the hollow flat nozzle 130, the bent pipe 118 injects nitrogen into the air velocity regulating valve 131. The nitrogen discharged from the air velocity regulating valve 131 enters the intake end of the three-way solenoid valve 137 through the air velocity sensor 132. The air velocity sensor 132 detects the air velocity, and the detected signal is transmitted to the controller. The controller controls the air velocity regulating valve 131 according to the preset value and the detected value to change the incoming air velocity. The nitrogen inside the three-way solenoid valve 137 is discharged through the upper nozzle 133 or the side nozzle 136. When the viscosity of the protective film 500 is relatively high, the nitrogen is sprayed onto the adhesion area between the protective film 500 and the backlight module 400 through the side nozzle 136 and the side air outlet net 135 to increase the air pressure of the separation air film. When the viscosity is relatively low, the nitrogen is ejected upward through the upper nozzle 133 and the upper air outlet net 134 to drive the protective film 500 to turn up, so that it is separated from the surface of the backlight module 400.

[0044] Embodiment 2, as Figures 1-10 shown, a backlight film tearing method for a full-automatic backlight assembly machine includes the following steps: S1. The manipulator grabs the backlight module 400 onto the fixing mechanism 200, and the fixing mechanism 200 adsorbs and fixes the backlight module 400. S2. The visual positioning module and image recognition technology are used to capture the edge or positioning mark of the protective film 500, and calculate the starting position and peeling direction of the protective film 500. S3. The moving mechanism 300 drives the film tearing mechanism 100 to move to the starting film tearing position, and then the first film tearing component 101 and the second film tearing component 102 of the film tearing mechanism 100 are adjusted to the starting position on one side of the backlight module 400 and the protective film 500. S4. The first film tearing component 101 works on the top of the protective film 500. The film tearing roller 110 of the first film tearing component 101 rotates on the top of the protective film 500, driving one side of the protective film 500 to bend upward, so that it is separated from the backlight module 400. S5. The air film generation module 119 of the second film tearing component 102 moves to the opposite side of the backlight module 400 and the protective film 500, injects nitrogen into the air film generation module 119, and the air film generation module 119 sprays out a long and narrow air film, and the air film impacts the connection between the backlight module 400 and the protective film 500 to tear the protective film 500, avoiding mechanical damage to the backlight module 400. S6. After the second film tearing component 102 works stably, the first film tearing component 101 is reset. Then, the protective film 500 drives the film tearing mechanism 100 to move, so that the second film tearing component 102 continues to move for film tearing. When the film tearing reaches the final position, the film tearing roller 110 is attached to the protective film 500, and the film tearing roller 110 is controlled to reverse, and the protective film 500 is slid out from the top of the backlight module 400. After removing the protective film 500, reset the fixing mechanism 200, the moving mechanism 300 and the film tearing mechanism 100, and use the robotic arm to take out the backlight module 400 after film tearing for subsequent assembly.

Claims

1. A backlight film tearing structure of a fully automatic backlight assembly machine, comprising a film tearing mechanism (100), characterized in that: The film tearing mechanism (100) includes a first film tearing component (101) and a second film tearing component (102), and a fixing frame (103) is fixedly connected to the tops of the first film tearing component (101) and the second film tearing component (102); The first film tearing component (101) includes a first plate body (104), a first air cylinder (105) is fixedly connected to the bottom of the first plate body (104), a piston rod of the first air cylinder (105) is fixedly connected to a first lifting seat (109), a first rotating frame (108) is rotatably connected inside the first lifting seat (109), and a film tearing roller (110) is rotatably connected inside the first rotating frame (108); The second film tearing component (102) includes a second plate body (112), a second air cylinder (113) is fixedly connected to the bottom of the second plate body (112), a piston rod of the second air cylinder (113) is fixedly connected to a second lifting seat (114), a second rotating frame (121) is rotatably connected inside the second lifting seat (114), a mounting seat (120) is rotatably connected inside the second rotating frame (121), and an air film generating module (119) is fixedly connected to one side of the mounting seat (120).

2. The backlight film tearing structure of the full-automatic backlight assembly machine according to claim 1, characterized in that: A first motor (106) is fixedly connected to one side of the first lifting seat (109), an output shaft of the first motor (106) is fixedly connected to the first rotating frame (108), a second motor (107) is fixedly connected to one side of the first rotating frame (108), and an output shaft of the second motor (107) is fixedly connected to the film tearing roller (110).

3. The backlight film tearing structure of the full-automatic backlight assembly machine according to claim 2, characterized in that: A first sliding rod (111) is fixedly connected to the top of the first lifting seat (109), and the first sliding rod (111) penetrates to the top of the first plate body (104) and is movably connected thereto.

4. The backlight film tearing structure of the full-automatic backlight assembly machine according to claim 3, wherein: A bent pipe (118) is fixedly connected inside the mounting seat (120), an air outlet end of the bent pipe (118) is communicated with an air inlet end of the air film generating module (119), an air inlet end of the bent pipe (118) is communicated with an air inlet solenoid valve (117), and an air inlet end of the air inlet solenoid valve (117) is communicated with a hose (122).

5. The backlight film tearing structure of the full-automatic backlight assembly machine according to claim 4, characterized in that: A third motor (115) is fixedly connected to one side of the second lifting seat (114), an output shaft of the third motor (115) is fixedly connected to the second rotating frame (121), a fourth motor (116) is fixedly connected to one side of the second rotating frame (121), and an output shaft of the fourth motor (116) is fixedly connected to the mounting seat (120).

6. The backlight film tearing structure of the full-automatic backlight assembly machine according to claim 5, characterized in that: A second sliding rod (123) is fixedly connected to the top of the second lifting seat (114), and the second sliding rod (123) penetrates to the top of the second plate body (112) and is movably connected thereto.

7. The backlight film tearing structure of the fully automatic backlight assembly machine according to claim 6, characterized in that: It further includes a fixing mechanism (200) and a moving mechanism (300). The fixing mechanism (200) is located at the bottom of the film tearing mechanism (100), the moving mechanism (300) is located at the top of the film tearing mechanism (100) and is fixedly connected thereto, and the moving mechanism (300) is fixedly installed at the rear side of the fixing mechanism (200).

8. The backlight film tearing structure of the full-automatic backlight assembly machine according to claim 7, characterized in that: The fixing mechanism (200) includes a placement frame (201). Four corners of the bottom of the placement frame (201) are fixedly connected with support rods (206). The bottoms of the support rods (206) are fixedly connected with a base (205). The top of the base (205) is fixedly connected with a support frame (204). A vacuum suction cup assembly (203) is fixedly installed at the center of the top of the support frame (204). A plurality of suction cups (202) are communicated with the top of the vacuum suction cup assembly (203).

9. The backlight film tearing structure of the fully automatic backlight assembly machine according to claim 8, wherein: The moving mechanism (300) includes a frame body (301). The frame body (301) is fixedly connected to the placement frame (201). A lead screw (302) is rotatably connected to the inner top of the frame body (301). A nut sleeve (304) is threadedly sleeved on the surface of the lead screw (302). The nut sleeve (304) is fixedly installed at the top of a fixing frame (103). The top of the nut sleeve (304) is fixedly connected with a sliding sleeve (305). A limiting rod (306) is slidably connected inside the sliding sleeve (305). The limiting rod (306) is fixedly installed at the inner top of the frame body (301). A fifth motor (303) is fixedly connected to one side of the frame body (301). The output shaft of the fifth motor (303) is fixedly connected to one end of the lead screw (302).

10. A method for backlight film tearing of a fully automatic backlight assembly machine, applicable to the backlight film tearing structure of the fully automatic backlight assembly machine described in claim 9, characterized in that, It includes the following steps: S1. Use a robotic arm to grab the backlight module (400) onto the fixing mechanism (200), and adsorb and fix the backlight module (400) through the fixing mechanism (200). S2. Capture the edge or positioning mark of the protective film (500) through a vision positioning module and image recognition technology, and calculate the starting position and peeling direction of the protective film (500). S3. The moving mechanism (300) drives the film tearing mechanism (100) to move to the starting film tearing position, and then the first film tearing assembly (101) and the second film tearing assembly (102) of the film tearing mechanism (100) are adjusted to the starting position on one side of the backlight module (400) and the protective film (500). S4. The first film tearing assembly (101) works on the top of the protective film (500). The film tearing roller (110) of the first film tearing assembly (101) rotates on the top of the protective film (500), driving one side of the protective film (500) to bend upward, so that it separates from the backlight module (400). S5. The air film generation module (119) of the second film tearing assembly (102) moves to the opposite side of the backlight module (400) and the protective film (500). Nitrogen is injected into the air film generation module (119). The air film generation module (119) sprays out a narrow air film, and the air film impacts the connection between the backlight module (400) and the protective film (500) to tear the protective film (500), avoiding mechanical damage to the backlight module (400). S6. After the second film tearing assembly (102) operates stably, reset the first film tearing assembly (101), and then the protective film (500) drives the film tearing mechanism (100) to move, so that the second film tearing assembly (102) continues to move for film tearing. When the film tearing reaches the final position, attach the film tearing roller (110) to the protective film (500), and control the film tearing roller (110) to reverse, sliding the protective film (500) out from the top of the backlight module (400); S7. After removing the protective film (500), reset the fixing mechanism (200), the moving mechanism (300) and the film tearing mechanism (100), and use the robotic arm to take out the backlight module (400) after film tearing for subsequent assembly.

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