A back panel edge trimming device for backlight production

Abstract

The present invention relates to the technical field of backlight source production, and in particular to a backplane edge trimming device for backlight source production, comprising a box body and a box door rotatably connected to the box body, a human-machine interactive display screen installed on the box door, a servo motor installed at the bottom of the box body, and a placement seat fixedly connected to the end of the output shaft of the servo motor. The present invention first places the backplane on the placement seat, a pressure rod presses and fixes the backplane, and then starts the electric screw to rotate forward, so that the electric grinding roller I contacts the side of the backplane, and then the electric grinding roller II swings and contacts the right angle of the backplane, and then the servo motor is started to drive the backplane to rotate through the placement seat, the electric grinding roller I trims the side of the backplane, and the electric grinding roller II removes the burrs at the right angles of the backplane to prevent the burrs at the right angles of the backplane from affecting the trimming quality, thereby improving the overall trimming quality.

Description

Technical Field

[0001] The invention relates to the technical field of backlight source production, and in particular to a back panel edge trimming device for backlight source production. Background Art

[0002] In the production process of backlight sources, a back panel is needed. During use, the back panel needs to be cut to the required size according to needs. However, burrs will appear on the edges of the back panel after cutting. The edges of the back panel need to be trimmed to remove the burrs.

[0003] A Chinese patent with publication number CN108214159A discloses a backlight panel edge grinding system for BLD backlight production, comprising a first electric telescopic rod, a placement table, a fixed plate and an edge grinding roller, wherein the upper and lower ends of the first electric telescopic rod are respectively connected to the top plate and the pressure plate, a motor is fixed above the placement table, and the lower part thereof is connected to the frame through a second electric telescopic rod, and a sleeve is fixed below the placement table, the fixed plate is connected to a bearing installed above the fixed table through a telescopic support column, and a positioning plate is welded on the telescopic support column, and the positioning plate and the plug are connected to each other, the edge grinding roller is installed on the motor, a positioning hole is reserved on the positioning plate, and a corresponding hole is opened on the fixed table below the positioning plate. Although the above patent can trim the edge of the back panel, during the trimming process of the back panel, burrs appear at the right angles on the upper and lower sides of the back panel, which are difficult to be polished, and the trimming is not comprehensive, affecting the trimming quality.

[0004] The present invention aims to solve the problems existing in the above patents. To this end, a back panel edge trimming device for backlight source production is proposed, which can trim the back and polish the right-angle edges at the same time to improve the overall trimming quality. Summary of the invention

[0005] In order to overcome the shortcomings of the above patent that although the edge of the back panel can be trimmed, burrs will appear at the right angles on the upper and lower sides of the back panel during the trimming process, which are difficult to grind and the trimming is not comprehensive, affecting the trimming quality, the present invention provides a back panel edge trimming device for backlight source production that can trim the back and grind the right-angle edges at the same time to improve the overall trimming quality.

[0006] The present invention is achieved through the following technical solutions:

[0007] A back panel edge trimming device for backlight source production includes a box body and a box door rotatably connected to the box body, a human-machine interactive display screen is installed on the box door, a servo motor is installed at the bottom of the box body, a placement seat is fixedly connected to the end of the output shaft of the servo motor, and is used to place the back panel, a cylinder is fixedly connected to the top of the box body, and the end of the telescopic rod of the cylinder is rotatably connected to a pressure rod located directly above the placement seat, and also includes a movable frame, an electric screw rod, a sliding frame, a connecting spring, an electric grinding roller I, a connecting rod, a fixed frame, an electric grinding roller II, a trigger component and a positioning component, wherein the positioning component is installed on the pressure rod and is used to center the back panel, and the inner side of the box body slides horizontally. A movable frame is movably connected, an electric screw threadedly connected to the movable frame is installed on the box body, a sliding frame is slidably connected to the movable frame, a connecting spring is connected between the sliding frame and the movable frame, an electric grinding roller I is installed on the sliding frame for trimming the back plate, the front and rear sides of the movable frame are symmetrically connected with connecting rods, the tail end of the connecting rod is rotatably connected to a fixed frame, an electric grinding roller II is installed on the fixed frame, a trigger component is arranged between the sliding frame and the fixed frame, the trigger component is used to drive the fixed frame to swing, and the fixed frame drives the electric grinding roller II to swing and contact with the right angle of the back plate, so that the electric grinding roller II rotates to remove the burrs at the right angle of the back plate.

[0008] Further explanation, the trigger assembly includes an L-shaped plate that is symmetrically rotatably connected to the front and rear sides of the movable frame. The left side of the L-shaped plate is rotatably connected to the fixed frame to drive the fixed frame to swing. A straight hole is opened on the L-shaped plate, and U-shaped rods are symmetrically fixed to the front and rear sides of the sliding frame. The U-shaped rod is slidably connected to the straight hole.

[0009] Further explanation, the positioning assembly includes a movable cylinder slidably mounted on the pressure rod, a compression spring is connected between the movable cylinder and the pressure rod, a swing plate is connected to the outer side of the movable cylinder at uniform circumferential rotation intervals, a reset spring is connected between the swing plate and the movable cylinder, a wedge plate is slidably connected to the swing plate, the bottom of the wedge plate is an inclined surface, a transparent plate is fixedly connected to the bottom of the wedge plate, a detector is installed on the inner side of the wedge plate, a buffer spring is connected between the wedge plate and the swing plate, and a swing assembly is arranged between the swing plate and the pressure rod for driving the swing plate to swing.

[0010] As a further explanation, the bottom of the movable cylinder is connected to balls for rotation at even intervals along the circumferential direction to guide the back plate.

[0011] Further explanation, the swing assembly includes a contact block symmetrically fixed to the shaft of the swing plate, the contact block is tilted, and L-shaped rods are fixed to the pressure rod at uniform intervals along the circumference. The L-shaped rods slide through the movable cylinder to drive the contact block to swing.

[0012] Further explanation, the back panel edge trimming device for backlight source production also includes a cleaning component, which includes a frame symmetrically slidably connected to the movable frame, a nozzle rotatably connected to the frame, which is used to spray air to blow away debris generated during the trimming process, an air intake pipe rotatably connected between the ends of the nozzle, the air intake pipe is a hose, a discharge pipe is connected to the bottom of the lower frame, a drive rod is fixed to the fixed frame, the drive rod slides through the frame, and is used to drive the frame to move, and a cleaning component is arranged between the frame and the nozzle, which is used to remove debris remaining on the back panel.

[0013] Further explanation, the cleaning assembly includes a cleaning roller fixedly mounted on the outside of the nozzle to remove debris remaining on the back plate, and a contact wheel is rotatably connected to the frame, and the shaft of the contact wheel is connected to the nozzle through a gear transmission.

[0014] To further illustrate, the back panel edge trimming device for backlight source production also includes a rubber ring fixedly connected to the pressure rod and the placement seat, which is used to increase the friction between the back panel and the rubber ring.

[0015] The beneficial effects of the present invention are:

[0016] 1. First place the back plate on the placement seat, press the back plate with the pressure rod, then start the electric screw to rotate forward, so that the electric grinding roller I contacts the side of the back plate, then the electric grinding roller II swings and contacts the right angle of the back plate, and then start the servo motor to drive the back plate to rotate through the placement seat. The electric grinding roller I trims the side of the back plate, and the electric grinding roller II removes the burrs at the right angles of the back plate to prevent the burrs at the right angles of the back plate from affecting the trimming quality, thereby improving the overall trimming quality.

[0017] 2. Under the action of the nozzle and the cleaning roller, whenever the back panel is being trimmed, the nozzle can spray air to remove the debris generated during the trimming process, and the cleaning roller can remove the remaining debris, which can prevent the debris generated during the trimming process from being ejected to the surroundings and affecting the environment, thereby ensuring the cleanliness of the surrounding environment.

[0018] 3. Under the action of the rubber ring, whenever the back panel is pressed and fixed, the rubber ring can increase the friction with the back panel, making the back panel more stable, thereby ensuring the stability of the trimming. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the pressure rod and the placement seat of the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the sliding frame, connecting spring and electric grinding roller I of the present invention.

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the connecting rod, the fixed frame and the electric grinding roller II of the present invention.

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the fixed frame and the electric grinding roller II in operation of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the positioning component of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the transparent plate and the detector of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure after the wedge-shaped plate of the present invention is folded.

[0027] Fig. 9 It is a three-dimensional structural schematic diagram of the cleaning component of the present invention.

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the nozzle of the present invention.

[0029] Fig.11 It is a schematic diagram of the three-dimensional structure of the rubber ring of the present invention.

[0030] In the above drawings: 1: box body, 2: box door, 3: human-computer interaction display screen, 4: cylinder, 5: pressure rod, 6: servo motor, 7: placement seat, 8: movable frame, 9: electric screw rod, 10: sliding frame, 11: connecting spring, 12: electric grinding roller I, 13: connecting rod, 131: fixed frame, 132: electric grinding roller II, 14: U-shaped rod, 141: L-shaped plate, 142: straight hole, 15: movable cylinder, 151: swing plate, 152: reset spring, 153: wedge plate, 154: buffer spring, 155: transparent plate, 156: compression spring, 157: detector, 158: contact block, 159: L-shaped rod, 16: frame, 161: discharge pipe, 162: nozzle, 163: air inlet pipe, 164: driving rod, 165: cleaning roller, 166: contact wheel, 17: rubber ring. DETAILED DESCRIPTION

[0031] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0032] Embodiment: A back panel edge trimming device for backlight production, see Figure 1-Figure 8 As shown, it includes a box body 1 and a box door 2 rotatably connected to the front side of the box body 1, a human-machine interactive display screen 3 is installed at the lower part of the box door 2, a servo motor 6 is installed in the middle of the bottom of the box body 1, and a placement seat 7 is fixedly connected to the end of the output shaft of the servo motor 6, and the placement seat 7 can place the back plate, and a cylinder 4 is fixedly connected in the middle of the top of the box body 1, and a pressure rod 5 is rotatably connected to the end of the telescopic rod of the cylinder 4, and the pressure rod 5 is located directly above the placement seat 7, and also includes a movable frame 8, an electric screw 9, a sliding frame 10, a connecting spring 11, an electric grinding roller I 12, a connecting rod 13, a fixed frame 131, an electric grinding roller II 132, a trigger component and a positioning component, the positioning component is installed on the pressure rod 5, and when the positioning component is in operation, the positioning component can realize the centering of the back plate, and the movable frame 8 is horizontally slidably connected to the right side of the bottom of the box body 1, and an electric screw 9 is installed on the lower right side of the box body 1. The movable screw rod 9 is threadedly connected to the lower part of the movable frame 8, and a sliding frame 10 is slidably connected to the upper part of the movable frame 8. Two connecting springs 11 are connected between the right side of the sliding frame 10 and the upper part of the outer right side surface of the movable frame 8. An electric grinding roller I12 is installed on the sliding frame 10. When the electric grinding roller I12 rotates, the electric grinding roller I12 can trim the back plate. The left side of the front and rear sides of the movable frame 8 is symmetrically connected to the connecting rod 13 in an upper and lower rotation manner. The tail ends of the four connecting rods 13 are all rotatably connected to the fixed frame 131. The four fixed frames 131 are all installed with electric grinding rollers II132. A trigger component is arranged between the sliding frame 10 and the fixed frame 131. The trigger component is used to drive the fixed frame 131 to swing. The fixed frame 131 drives the electric grinding roller II132 to swing and contact with the right angle of the back plate, so that the electric grinding roller II132 rotates to remove the burrs at the right angle of the back plate.

[0033] See also Figure 4 and Figure 5 As shown, the trigger assembly includes a U-shaped rod 14 and an L-shaped plate 141. The left sides of the front and rear side surfaces inside the movable frame 8 are symmetrically connected to the L-shaped plates 141 for rotation. The left sides of the four L-shaped plates 141 are respectively connected to the outer side surfaces of the four fixed frames 131 for rotation. When the L-shaped plate 141 swings, the L-shaped plate 141 can drive the fixed frame 131 to swing. The sides of the upper and lower L-shaped plates 141 that are close to each other are each provided with a straight hole 142. The front and rear side surfaces of the sliding frame 10 are symmetrically fixed to the U-shaped rods 14, and the four U-shaped rods 14 are respectively connected to the straight holes 142 for sliding.

[0034] See also Figure 6-Figure 8As shown, the positioning assembly includes a movable cylinder 15, a swing plate 151, a reset spring 152, a wedge plate 153, a buffer spring 154, a transparent plate 155, a compression spring 156, a detector 157 and a swing assembly. The movable cylinder 15 is slidably mounted on the pressure rod 5. The bottom of the movable cylinder 15 is connected to balls at uniform intervals along the circumferential direction. The balls can guide the back plate. A compression spring 156 is connected between the inner side of the movable cylinder 15 and the upper part of the pressure rod 5. Four swing plates 151 are connected to the outer side of the movable cylinder 15 at uniform intervals along the circumferential direction. The four swing plates 151 are all connected to the outer side of the movable cylinder 15 with a reset spring 152. The four swing plates 151 are slidably penetrated with a wedge plate 153. The bottom of the wedge plate 153 is an inclined surface. The bottom of the wedge plate 153 is fixedly penetrated with a transparent plate Bright plate 155, a detector 157 is installed on the top of the wedge plate 153, two buffer springs 154 are connected between the outer top of the wedge plate 153 and the bottom of the swing plate 151, and a swing assembly is arranged between the shaft of the swing plate 151 and the pressure rod 5. When the swing assembly is in operation, the swing assembly can drive the swing plate 151 to swing; the swing assembly includes a contact block 158 and an L-shaped rod 159, and the shafts of the four swing plates 151 are symmetrically fixed with contact blocks 158, and the contact blocks 158 are inclined. Four groups of L-shaped rods 159 are fixed at even intervals along the circumferential direction at the lower part of the pressure rod 5, and the number of L-shaped rods 159 in each group is two. The L-shaped rods 159 slide through the movable cylinder 15, and when the L-shaped rods 159 move downward and contact with the contact blocks 158, the L-shaped rods 159 can drive the contact blocks 158 to swing.

[0035] First, pull the box door 2 upward to swing open, then put the back plate on the placement seat 7, and then start the cylinder 4. The telescopic rod of the cylinder 4 extends to drive the pressure rod 5 to move downward, and the pressure rod 5 drives the L-shaped rod 159 to move downward. At the same time, the pressure rod 5 also drives the movable cylinder 15 downward through the compression spring 156, and the movable cylinder 15 drives the swing plate 151 to move downward. The swing plate 151 drives the wedge plate 153 to move downward through the buffer spring 154. When the ball at the bottom of the movable cylinder 15 contacts the back plate, the wedge plate 153 moves downward so that the inclined surface contacts the back plate, and the four wedge plates 153 center the back plate. Due to the ball structure at the bottom of the movable cylinder 15, the back plate can be guided so that the back plate can move smoothly to the center. After the back plate is centered, the back plate is aligned with the wedge plate 153 is limited, and the wedge plate 153 stops moving downward. At this time, the detector 157 detects the back plate and transmits the length and width data of the back plate to the human-machine interaction display screen 3. The human-machine interaction display screen 3 adjusts the moving stroke of the movable frame 8 according to the data of the back plate. The swing plate 151 continues to move downward to compress the buffer spring 154. When the buffer spring 154 is compressed to the maximum stroke, the swing plate 151 stops moving downward. The swing plate 151 stops the contact block 158 from moving. When the L-shaped rod 159 continues to move downward and contacts the contact block 158, the L-shaped rod 159 drives the contact block 158 to swing downward, and the contact block 158 drives the swing plate 151 to swing upward and retract. The reset spring 152 is stretched, and the swing plate 151 drives the wedge The wedge-shaped plate 153 swings upward and is retracted, and the wedge-shaped plate 153 is out of contact with the back plate. At this time, the pressure rod 5 continues to move downward and contacts the back plate. The pressure rod 5 cooperates with the placement seat 7 to press and fix the back plate, close the cylinder 4, start the electric screw 9 to rotate forward to drive the movable frame 8 to move left, the movable frame 8 drives the sliding frame 10 to move left through the connecting spring 11, and the movable frame 8 also drives the fixed frame 131 to move left through the connecting rod 13, the fixed frame 131 drives the electric grinding roller II 132 to move left, the sliding frame 10 moves left and drives the electric grinding roller I 12 to move left and contact the side of the back plate, the back plate limits the electric grinding roller I 12, the electric grinding roller I 12 stops moving, so that the sliding frame 10 stops moving, and the sliding frame 10 stops the U-shaped rod 14 from moving. The movable frame 8 continues to move to the left, driving the L-shaped plate 141 to move to the left. The U-shaped rod 14 drives the L-shaped plate 141 moving to the left to swing. The swing of the L-shaped plate 141 drives the upper and lower fixed frames 131 to swing in the direction of approaching each other. The fixed frames 131 drive the upper and lower electric grinding rollers Ⅱ 132 to swing in the direction of approaching each other. The upper and lower electric grinding rollers Ⅱ 132 contact the right angles on the upper and lower sides of the back plate, close the electric screw 9, and then pull the box door 2 to swing down and close. The human-machine interactive display screen 3 is operated to control the electric grinding roller Ⅰ12 and the electric grinding roller Ⅱ 132 to start, and the servo motor 6 and the electric screw 9 are controlled to start. The servo motor 6 drives the back plate to rotate through the placement seat 7, and the electric screw 9 rotates alternately forward and reverse to drive the movable frame 8 to move left and right.The movable frame 8 drives the electric grinding roller Ⅰ12 through the sliding frame 10 to move left and right as the back plate rotates, so that the electric grinding roller Ⅰ12 is always in close contact with the side of the back plate, and the electric grinding roller Ⅰ12 trims the back plate. At the same time, the electric grinding roller Ⅱ132 grinds the right angles on the upper and lower sides of the back plate to prevent burrs at the right angles of the back plate from affecting the trimming quality, thereby improving the overall trimming quality. After the burrs on the side and right angles of the back plate are cleaned, the operator controls the servo motor 6 and the electric screw 9 to turn off, the back plate stops rotating, and the electric screw 9 is started to drive the movable frame 8 to move right and reset. The movable frame 8 first drives the L-shaped plate 141 to move right, and the L-shaped plate 141 is reset by swinging through the U-shaped rod 14. The L-shaped plate 141 drives the upper and lower electric grinding rollers Ⅱ 132 to swing away from each other through the fixed frame 131. Then the movable frame 8 continues to move right to reset the connecting spring 11, and the movable frame 8 drives the sliding frame 10 to move right and reset through the connecting spring 11. The sliding frame 10 drives the electric grinding roller Ⅰ12 to move rightward and reset, and then the cylinder 4 is started to drive the pressure rod 5 to move upward and reset. The pressure rod 5 first drives the L-shaped rod 159 to move upward and disengage from the contact block 158. Due to the action of the reset spring 152, the swing plate 151 swings downward and resets, and drives the wedge plate 153 to swing downward and reset through the buffer spring 154. Then the pressure rod 5 drives the movable cylinder 15 to move upward and reset through the connecting spring 11. The movable cylinder 15 drives the wedge plate 153 to move upward and reset through the swing plate 151, and then pull the box door 2 to open, and remove the trimmed back plate from the placement seat 7.

[0036] See also Fig. 9 and Fig.10As shown, the back panel edge trimming device for backlight source production also includes a cleaning component installed between the fixed frame 131 and the movable frame 8, the cleaning component includes a frame 16, a discharge pipe 161, a nozzle 162, an air intake pipe 163, a driving rod 164 and a cleaning component, the left side of the movable frame 8 is symmetrically and slidably connected with the frame 16 up and down, the front sides of the upper and lower frames 16 are rotatably connected with the nozzle 162, the nozzle 162 can realize the air spraying to blow away the debris generated during the trimming process, the right ends of the upper and lower nozzles 162 are rotatably connected with the air intake pipe 163, the air intake pipe 163 is a hose, the middle of the bottom of the lower frame 16 is connected with the discharge pipe 161, and the upper and lower fixed frames 131 are fixed on the sides away from each other. A driving rod 164 is connected, and the driving rod 164 slides through the frame 16. When the driving rod 164 moves, the driving rod 164 can drive the frame 16 to move. A cleaning component is arranged between the frame 16 and the nozzle 162. When the cleaning component is in operation, the cleaning component can remove the debris remaining on the back plate; the cleaning component includes a cleaning roller 165 and a contact wheel 166. The outer sides of the upper and lower nozzles 162 are fixedly sleeved with cleaning rollers 165. When the cleaning rollers 165 rotate, the cleaning rollers 165 can remove the debris remaining on the back plate. The front left sides of the upper and lower frames 16 are rotatably connected with the contact wheels 166, and the shaft of the contact wheel 166 is connected to the left side of the nozzle 162 through a gear transmission.

[0037] Initially, the air inlet pipe 163 is connected to an external air pump. When the fixed frame 131 drives the upper and lower electric grinding rollers II 132 to swing towards each other, the fixed frame 131 also drives the upper and lower frame bodies 16 to move towards each other through the driving rod 164. The frame bodies 16 drive the upper and lower contact wheels 166 to move towards each other. When the upper and lower electric grinding rollers II 132 contact the right angles of the back plate, the upper and lower frame bodies 16 contact each other to form a closed space to cover the electric grinding rollers II 132 and the electric grinding rollers I 12, and the contact wheel 166 contacts the back plate. When the back plate rotates for comprehensive trimming, the external air pump is started to discharge air into the air inlet pipe 163, and the air in the air inlet pipe 163 is discharged into the nozzle 162. The nozzle 162 sprays the air. The air sprays out the The debris blown away falls into the lower frame 16, and the debris in the frame 16 is discharged through the discharge pipe 161. At the same time, the rotation of the back plate drives the contact wheel 166 to rotate, and the contact wheel 166 drives the nozzle 162 to rotate through the gear transmission, and the nozzle 162 drives the cleaning roller 165 to rotate. The cleaning roller 165 rotates to remove the debris remaining on the back plate, and the removed debris falls downward into the lower frame 16. When the back plate trimming is completed, the back plate stops rotating, and the back plate stops driving the contact wheel 166 to rotate, and the cleaning roller 165 also stops rotating. The fixed frame 131 drives the upper and lower electric grinding rollers II 132 to swing away from each other and reset. The fixed frame 131 drives the upper and lower frames 16 to swing away from each other and reset through the driving rod 164, so that the contact wheel 166 is out of contact with the back plate. In this way, the debris in the trimming process can be prevented from being ejected to the surrounding environment to affect the environment, thereby ensuring the cleanliness of the surrounding environment.

[0038] See also Fig.11 As shown, the back panel edge trimming device for backlight production also includes a rubber ring 17. The bottom of the pressure rod 5 and the top of the placement seat 7 are fixedly connected with the rubber ring 17. The rubber ring 17 can increase the friction between the rubber ring and the back panel.

[0039] When the backboard is placed on the placement seat 7 and the pressure rod 5 presses and fixes the backboard, the rubber ring 17 contacts the backboard, and the rubber ring 17 increases the friction between the rubber ring 17 and the backboard, so that the backboard can be placed more firmly, thereby ensuring the stability of the trimming.

[0040] Finally, it is necessary to point out that the above content is only used to help understand the technical solution of the present invention and cannot be understood as limiting the scope of protection of the present invention; non-essential improvements and adjustments made by technical personnel in the field of technology based on the above content of the present invention are all within the scope of protection required by the present invention.

Claims

1. A back panel edge trimming device for backlight production, comprising a box body (1) and a box door (2) rotatably connected to the box body (1), a human-machine interactive display screen (3) being installed on the box door (2), a servo motor (6) being installed at the bottom of the box body (1), an output shaft end of the servo motor (6) being fixedly connected to a placement seat (7) for placing the back panel, a cylinder (4) being fixedly connected to the top of the box body (1), a telescopic rod end of the cylinder (4) being rotatably connected to a pressure rod (5) located directly above the placement seat (7), characterized in that: The invention also comprises a movable frame (8), an electric screw rod (9), a sliding frame (10), a connecting spring (11), an electric grinding roller I (12), a connecting rod (13), a fixed frame (131), an electric grinding roller II (132), a trigger assembly and a positioning assembly. The positioning assembly is mounted on the pressure rod (5) and is used to center the back plate. The movable frame (8) is horizontally slidably connected to the inner side of the box body (1). The electric screw rod (9) threadedly connected to the movable frame (8) is mounted on the box body (1). The sliding frame (10) is slidably connected to the movable frame (8). A connecting spring (11) is connected between the sliding frame (10) and the movable frame (8). An electric grinding roller I (12) is installed on the movable frame (10) for trimming the back plate. The movable frame (8) is symmetrically rotatably connected to the front and rear sides with connecting rods (13). The tail end of the connecting rod (13) is rotatably connected to a fixed frame (131). An electric grinding roller II (132) is installed on the fixed frame (131). A trigger component is provided between the sliding frame (10) and the fixed frame (131). The trigger component is used to drive the fixed frame (131) to swing. The fixed frame (131) drives the electric grinding roller II (132) to swing and contact the right angle of the back plate, so that the electric grinding roller II (132) rotates to remove burrs at the right angle of the back plate. The trigger assembly comprises an L-shaped plate (141) symmetrically rotatably connected to the front and rear side surfaces of the movable frame (8), the left side of the L-shaped plate (141) is rotatably connected to the fixed frame (131) to drive the fixed frame (131) to swing, a straight hole (142) is opened on the L-shaped plate (141), and U-shaped rods (14) are symmetrically fixed to the front and rear side surfaces of the sliding frame (10), and the U-shaped rods (14) are slidably connected to the straight hole (142); The positioning assembly comprises a movable cylinder (15) which is slidably mounted on the pressure rod (5), a compression spring (156) is connected between the movable cylinder (15) and the pressure rod (5), a swing plate (151) is rotatably connected to the outer side of the movable cylinder (15) at uniform intervals along the circumferential direction, a return spring (152) is connected between the swing plate (151) and the movable cylinder (15), a wedge plate (153) is slidably connected to the swing plate (151), the bottom of the wedge plate (153) is an inclined surface, a transparent plate (155) is fixedly connected to the bottom of the wedge plate (153), a detector (157) is installed on the inner side of the wedge plate (153), a buffer spring (154) is connected between the wedge plate (153) and the swing plate (151), and a swing assembly is arranged between the swing plate (151) and the pressure rod (5) for driving the swing plate (151) to swing; The bottom of the movable cylinder (15) is connected to balls for rotation at even intervals along the circumferential direction to guide the back plate; The swing assembly comprises a contact block (158) symmetrically fixed to the shaft of the swing plate (151), the contact block (158) being arranged obliquely, and L-shaped rods (159) being fixedly connected to the pressure rod (5) at even intervals in the circumferential direction, the L-shaped rods (159) slidably passing through the movable cylinder (15) for driving the contact block (158) to swing.

2. The back panel edge trimming device for backlight production according to claim 1, characterized in that: The back panel edge trimming device for backlight source production also includes a cleaning component, which includes a frame (16) symmetrically slidably connected to the movable frame (8), a nozzle (162) rotatably connected to the frame (16) for ejecting air to blow away debris generated during the trimming process, an air intake pipe (163) rotatably connected between the ends of the nozzle (162), the air intake pipe (163) is a hose, the bottom of the lower frame (16) is connected to a discharge pipe (161), a driving rod (164) is fixedly connected to the fixed frame (131), the driving rod (164) slidably penetrates the frame (16) and is used to drive the frame (16) to move, and a cleaning component is arranged between the frame (16) and the nozzle (162) for removing debris remaining on the back panel.

3. The back panel edge trimming device for backlight production as claimed in claim 2, characterized in that: The cleaning assembly comprises a cleaning roller (165) fixedly sleeved on the outside of the nozzle (162) to remove debris remaining on the back plate. A contact wheel (166) is rotatably connected to the frame (16), and the shaft of the contact wheel (166) is connected to the nozzle (162) via a gear transmission.

4. The back panel edge trimming device for backlight production as claimed in claim 3, characterized in that: The back panel edge trimming device for backlight source production also includes a rubber ring (17) fixedly connected to the pressure rod (5) and the placement seat (7) for increasing the friction between the back panel and the rubber ring.

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