Laser cutting device for light guide plate of backlight source module

Abstract

The invention relates to the technical field of backlight module light guide plate processing, in particular to a laser cutting device for a backlight module light guide plate, which comprises a base and a casing fixedly connected onto the base, a cover plate is rotatably connected onto the casing, and a double-shaft moving machine is mounted on the inner side of the casing. The light guide plate is firstly placed on the grid plate, then the double-shaft motor is started to drive the screw rod to rotate forwards, the screw rod rotates forwards to drive the movable plate to move inwards, the movable plate drives the positioning plate to move inwards through the compression spring to make contact with the light guide plate, the positioning plate conducts deviation rectifying and positioning on the light guide plate, and the light guide plate is straightened; then the laser cutting machine and the double-shaft moving machine are started, the double-shaft moving machine drives the laser cutting machine to carry out laser cutting on the aligned light guide plate, in this way, through the effect of the positioning plate, the placed light guide plate can be automatically corrected and positioned, an operator does not need to manually correct and position the light guide plate, and therefore the labor intensity of the operator is reduced, and the working efficiency is improved. And the laser cutting effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of light guide plate processing for backlight modules, and particularly to a laser cutting device for a light guide plate of a backlight module. Background Art

[0002] In the field of liquid crystal display technology, the backlight module is a key component to ensure the normal display of images on the liquid crystal panel. As the core component in the backlight module, the light guide plate plays a particularly crucial role. However, during the production and processing of the light guide plate, in order to meet the design requirements of different liquid crystal display modules, it is often necessary to cut the light guide plate.

[0003] Chinese Patent No. CN218109692U discloses a high-speed laser cutting device for light guide plate processing, including a box body. A fixed plate is fixedly connected to the top of the box body. A housing is fixedly connected to the left side of the top of the fixed plate. A motor is fixedly installed on one side of the housing. The output end of the motor is fixedly connected to a threaded rod. A threaded sleeve is threadedly connected to the surface of the threaded rod. A fixed rod is fixedly connected to the top of the threaded sleeve. A cross plate is fixedly connected to the top of the fixed rod. A laser is fixedly installed on one side of the top of the cross plate. Although the above patent can perform laser cutting on the light guide plate, it is necessary to manually place and adjust the light guide plate to make it in a precise position for laser cutting after placing it, which increases the labor intensity of the operator. Moreover, due to human factors, the placement position of the light guide plate is inaccurate, thus affecting the laser cutting effect.

[0004] The present invention aims to solve the problems existing in the above patent. Therefore, a laser cutting device for a light guide plate of a backlight module is proposed, which can automatically correct the deviation and position the placed light guide plate, reduce the labor intensity of the operator, and improve the laser cutting effect. Summary of the Invention

[0005] In order to overcome the disadvantages that it is necessary to manually place and adjust the light guide plate to make it in a precise position for laser cutting after placing it, which increases the labor intensity of the operator, and due to human factors, the placement position of the light guide plate is inaccurate, thus affecting the laser cutting effect, the present invention provides a laser cutting device for a light guide plate of a backlight module, which can automatically correct the deviation and position the placed light guide plate, reduce the labor intensity of the operator, and improve the laser cutting effect.

[0006] The present invention is achieved through the following technical solutions: A laser cutting device for a light guide plate of a backlight module, comprising a base and a casing fixedly connected to the base. A cover plate is rotatably connected to the casing. A double-axis moving machine is installed inside the casing. A laser cutting head is installed on the moving part of the double-axis moving machine. A grid plate located inside the casing is fixedly connected to the base. The device further includes movable plates symmetrically and slidably connected to the left and right sides of the top of the base. Guide rods are slidably inserted through the movable plates. A positioning plate is fixedly connected between the ends of the front and rear guide rods. A rubber strip is fixedly connected to the positioning plate for buffering and protecting the light guide plate. A compression spring is connected between the positioning plate and the movable plate. A driving component is arranged between the base and the movable plate. The driving component is used to drive the left and right movable plates to move inward. The movable plates drive the left and right positioning plates to move inward through the compression spring, so that the positioning plates perform deviation correction and positioning on the light guide plate. A cooling component is arranged between the casing and the laser cutting head for cooling the position of the light guide plate cut by the laser.

[0007] Further description: The driving component includes a double-axis motor installed inside the base. The end of the output shaft of the double-axis motor is fixedly connected with a screw rod. The threads of the two screw rods are opposite. The screw rods are threadedly connected with the movable plates.

[0008] Further description: The cooling component includes a refrigeration box fixedly connected between the casing and the base. An air extraction pump is installed on the laser cutting head. The inlet end of the air extraction pump is connected with a corrugated hose. The tail end of the corrugated hose slidably penetrates through the casing and is connected with the refrigeration box. The outlet end of the air extraction pump is connected with a communicating pipe. A porous hollow plate is connected to the communicating pipe to spray cold air to cool the position of the light guide plate cut by the laser. A moving component is arranged on the laser cutting head for driving the porous hollow plate to move.

[0009] Further description: The moving component includes cylinders fixedly connected to the laser cutting head at uniform intervals. The end of the telescopic rod of the cylinder is fixedly connected with an n-shaped rack. Fixed rods are symmetrically fixedly connected to the n-shaped rack. Mounting seats are slidably sleeved between the fixed rods on each n-shaped rack. The mounting seats are rotatably connected with the porous hollow plate for driving the porous hollow plate to move. Connecting springs sleeved on the fixed rods are symmetrically connected between the mounting seats and the n-shaped rack. Rollers are symmetrically rotatably connected to the bottom of the mounting seats for reducing the friction between the light guide plate and the mounting seats. Straight gears meshing with the n-shaped rack are symmetrically and fixedly sleeved on the shaft part of the porous hollow plate.

[0010] Further description: The laser cutting device for the light guide plate of the backlight module further includes a discharging component. The discharging component includes a guide rod fixedly connected to the grid plate. A push plate in contact and cooperation with the grid plate is slidably sleeved on the guide rod to push the waste material and the light guide plate cut by the laser to complete discharging. A lead screw threadedly connected with the push plate is rotatably connected to the grid plate. A driving motor is installed on the base. The end of the output shaft of the driving motor is fixedly connected with the end of the lead screw.

[0011] Further explanation, the laser cutting device for the light guide plate of the backlight module also includes a cleaning component, which includes a horizontal plate slidably connected to the casing, a reset spring symmetrically connected between the horizontal plate and the base, vertical rods symmetrically slidably penetrated on the horizontal plate, a wiping plate is fixed between the bottom ends of the vertical rods to clean the debris attached to the light guide plate, a buffer spring is symmetrically connected between the wiping plate and the horizontal plate, and a trigger assembly is arranged between the horizontal plate and the push plate to drive the horizontal plate to move.

[0012] To further explain, the trigger assembly includes an L-shaped rod fixed to the bottom of the horizontal plate, a trigger plate located in the grid plate is fixed to the push plate, the front side of the trigger plate is an inclined surface, and the inclined surface of the trigger plate contacts the L-shaped rod to drive the L-shaped rod to move downward.

[0013] Further explanation, the laser cutting device for the light guide plate of the backlight module also includes a collection frame embedded and snapped onto the base for collecting debris, and a through groove connected to the collection frame is provided on the top of the base for guiding the debris.

[0014] The beneficial effects of the present invention are: 1. First place the light guide plate on the grid plate, then start the dual-axis motor to drive the screw to rotate forward, the screw rotates forward to drive the left and right movable plates to move inward, the movable plate drives the left and right positioning plates to move inward and contact the light guide plate through the compression spring, the positioning plate corrects the deviation of the light guide plate and straightens it, then start the laser cutting machine and the dual-axis moving machine, the dual-axis moving machine drives the laser cutting machine to perform laser cutting on the straightened light guide plate, in this way, through the role of the positioning plate, the placed light guide plate can be automatically corrected and positioned, so that the operator does not need to manually correct the deviation and position the light guide plate, thereby reducing the labor intensity of the operator and improving the effect of laser cutting.

[0015] 2. Under the action of the porous hollow plate, whenever the laser cutting machine performs laser cutting on the light guide plate, the porous hollow plate can spray cold air on the position where the light guide plate is laser cut. The cold air cools down the position where the light guide plate is laser cut to prevent the high temperature during laser cutting from damaging the light guide plate and affecting the uniformity of light guide, thereby ensuring the safety of laser cutting of the light guide plate.

[0016] 3. Under the action of the push plate, every time the light guide plate is laser cut, the push plate can move the laser-cut light guide plate and the waste forward to complete the unloading. In this way, the operator does not need to manually remove the waste and the laser-cut light guide plate, which makes it more convenient for the operator to collect and process the waste and the laser-cut light guide plate, thereby improving the collection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 This is a three-dimensional structural schematic diagram of the dual-axis moving machine and the laser cutting head of the present invention.

[0019] Figure 3 This is a three-dimensional structural schematic diagram of the guide rod, positioning plate and compression spring of the present invention.

[0020] Figure 4 This is a three-dimensional structural schematic diagram of the cooling component of the present invention.

[0021] Figure 5 This is a three-dimensional structural schematic diagram of the cylinder, n-shaped rack and mounting seat of the present invention.

[0022] Figure 6 This is a three-dimensional structural schematic diagram of the connecting spring of the present invention.

[0023] Figure 7 This is a three-dimensional structural schematic diagram of the unloading component of the present invention.

[0024] Figure 8 This is a three-dimensional structural schematic diagram of the cleaning component of the present invention.

[0025] Figure 9 This is a three-dimensional structural schematic diagram of the buffer spring of the present invention.

[0026] Figure 10 This is a three-dimensional structural schematic diagram of the through groove and the collection box of the present invention.

[0027] In the reference numerals: 1 - base, 2 - housing, 3 - cover plate, 4 - dual-axis moving machine, 5 - laser cutting head, 6 - grid plate, 7 - movable plate, 8 - guide rod, 9 - positioning plate, 10 - compression spring, 11 - rubber strip, 12 - dual-axis motor, 121 - screw rod, 13 - porous hollow plate, 131 - connecting pipe, 132 - air extraction pump, 133 - refrigeration box, 134 - corrugated hose, 135 - cylinder, 136 - n-shaped rack, 1361 - connecting spring, 1362 - fixed rod, 137 - mounting seat, 138 - spur gear, 139 - roller, 14 - guide rod, 141 - push plate, 142 - lead screw, 143 - driving motor, 15 - cross plate, 151 - return spring, 152 - vertical rod, 153 - buffer spring, 154 - wiping plate, 155 - L-shaped rod, 156 - trigger plate, 16 - through groove, 17 - collection box. Detailed implementation manners

[0028] It should be noted first that in the embodiments described differently, the same components are provided with the same reference numerals or the same component names. Among them, the disclosure contained throughout the specification can be meaningfully applied to the same components with the same reference numerals or the same component names. The positional descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated drawings and are meaningfully applied to the new positions when the positions change.

[0029] Embodiment: A laser cutting device for a light guide plate of a backlight module. Please refer to Figures 1-6 As shown in the figure, it includes a base 1 and a housing 2 fixedly connected to the top of the base 1. A cover plate 3 is rotatably connected to the middle of the front side of the housing 2. A double-axis moving machine 4 is installed inside the housing 2. A laser cutting head 5 is installed on the moving part of the double-axis moving machine 4. A grid plate 6 is fixedly connected to the top of the base 1. The grid plate 6 is located inside the housing 2. It also includes a movable plate 7, a guide rod 8, a positioning plate 9, a compression spring 10, a rubber strip 11, a driving component and a cooling component. Movable plates 7 are symmetrically slidably connected to the front and rear on both the left and right sides of the top of the base 1. The upper part of the movable plate 7 is slidably penetrated by a guide rod 8. A positioning plate 9 is fixedly connected between the inner ends of the front and rear guide rods 8. Rubber strips 11 are fixedly connected to the sides of the left and right positioning plates 9 close to each other. When the rubber strip 11 contacts the light guide plate, the rubber strip 11 can buffer and protect the light guide plate. Compression springs 10 are connected between the sides of the left and right positioning plates 9 away from each other and the sides of the left and right movable plates 7 close to each other. A driving component is arranged between the base 1 and the movable plate 7. The driving component is used to drive the left and right movable plates 7 to move inward. The movable plate 7 drives the left and right positioning plates 9 to move inward through the compression spring 10, so that the positioning plate 9 corrects and positions the light guide plate. A cooling component is arranged between the housing 2 and the laser cutting head 5. When the cooling component operates, the cooling component can cool the position of the light guide plate cut by the laser.

[0030] Please refer to Figure 3 As shown in the figure, the driving component includes a double-axis motor 12 and a screw 121. A double-axis motor 12 is installed at the front part inside the base 1. Screw 121s are fixedly connected to the ends of the output shafts on the left and right sides of the double-axis motor 12. The threads of the left and right screw 121s are opposite. The left and right screw 121s are respectively threadedly connected to the lower parts of the front left and right movable plates 7. The screw 121 can drive the movable plate 7 to move, so that the positioning plate 9 moves to correct and position the light guide plate.

[0031] Please refer to Figures 4-6As shown in the figure, the cooling component includes a porous hollow plate 13, a connecting pipe 131, an air extraction pump 132, a refrigeration box 133, a corrugated hose 134 and a moving component. A refrigeration box 133 is fixedly connected between the rear side surface of the outer shell 2 and the rear side surface of the base 1. An air extraction pump 132 is installed on the upper part of the rear side of the laser cutting head 5. The air inlet end of the air extraction pump 132 is connected to a corrugated hose 134. The tail end of the corrugated hose 134 slidably penetrates through the rear side of the outer shell 2 and is connected to the upper part of the front side of the refrigeration box 133. The air outlet end of the air extraction pump 132 is connected to a connecting pipe 131. Four porous hollow plates 13 are connected to the connecting pipe 131. When cold air is discharged into the porous hollow plate 13, the porous hollow plate 13 can spray out the cold air to cool the position of the light guide plate cut by the laser. A moving component is arranged on the laser cutting head 5. When the moving component operates, the moving component can drive the porous hollow plate 13 to move. The moving component includes a cylinder 135, an n-shaped rack 136, a connecting spring 1361, a fixed rod 1362, a mounting seat 137, a spur gear 138 and a roller 139. Four cylinders 135 are fixedly connected to the lower part of the laser cutting head 5 at equal intervals. The end parts of the telescopic rods of the four cylinders 135 are fixedly connected to an n-shaped rack 136. Fixed rods 1362 are symmetrically fixedly connected to the inner top of the n-shaped rack 136. A mounting seat 137 is slidably sleeved between the two fixed rods 1362 on the inner side of each n-shaped rack 136. The mounting seat 137 is rotatably connected to the lower part of the porous hollow plate 13. The mounting seat 137 can drive the porous hollow plate 13 to move. Connecting springs 1361 are symmetrically connected between the top of the mounting seat 137 and the inner top of the n-shaped rack 136. The connecting springs 1361 are sleeved on the fixed rods 1362. Rollers 139 are symmetrically rotatably connected to the bottom of the mounting seat 137. The rollers 139 can reduce the friction between the light guide plate and the mounting seat 137 to protect the light guide plate. Spur gears 138 are symmetrically fixedly sleeved on the shaft part of the porous hollow plate 13. The spur gears 138 are meshed with the n-shaped rack 136.

[0032] First, pull the cover plate 3 to swing upward to open it. Then, place the light guide plate on the grid plate 6. The guide plate is located between the left and right positioning plates 9. Pull the cover plate 3 to swing downward to close it. Then, start the double-shaft motor 12 to rotate forward. The double-shaft motor 12 drives the left and right screws 121 to rotate forward. The forward rotation of the left and right screws 121 drives the left and right movable plates 7 to move inward. The movable plates 7 drive the left and right positioning plates 9 to move inward through the compression springs 10. The left and right positioning plates 9 drive the left and right rubber strips 11 to move inward. The inward movement of the rubber strips 11 contacts the light guide plate. The positioning plates 9 correct the deviation and position the light guide plate through the rubber strips 11, so that the light guide plate is in a straightened position and is also clamped and fixed. Due to the function of the rubber strips 11, the light guide plate can be protected. After the positioning plates 9 correct the deviation and position the light guide plate, they stop moving. The movable plates 7 continue to move inward to compress the compression springs 10. Turn off the double-shaft motor 12, and the movable plates 7 stop moving. Due to the function of the compression springs 10, the positioning plates 9 can clamp and fix the light guide plate more firmly. At the same time, start the cylinder 135. The telescopic rod of the cylinder 135 extends to drive the n-shaped rack 136 to move downward. The downward movement of the n-shaped rack 136 drives the mounting seat 137 to move downward through the connecting spring 1361. The downward movement of the mounting seat 137 drives the porous hollow plate 13 and the roller 139 to move downward. The porous hollow plate 13 drives the spur gear 138 to move downward. The spur gear 138 moves downward synchronously with the n-shaped rack 136. When the roller 139 moves downward and contacts the guide plate, the roller 139 stops moving downward. The roller 139 causes the mounting seat 137 to stop moving downward. The mounting seat 137 stops driving the porous hollow plate 13 to move downward. The n-shaped rack 136 continues to move downward to compress the connecting spring 1361. The n-shaped rack 136 continues to move downward to drive the spur gear 138 to rotate. The rotation of the spur gear 138 drives the porous hollow plate 13 to swing downward. The porous hollow plate 13 swings downward to a horizontal state and approaches the light guide plate. Turn off the cylinder 135, and then start the laser cutting head 5 and the double-shaft moving machine 4. The double-shaft moving machine 4 drives the laser cutting head 5 to move. The moving laser cutting head 5 performs laser cutting on the light guide plate after deviation correction and positioning, so that the light guide plate is laser cut into the required shape and size. At the same time, the moving laser cutting head 5 drives the mounting seat 137 to move through the cylinder 135, the n-shaped rack 136 and the fixed rod 1362. The mounting seat 137 drives the roller 139 to move. The roller 139 rolls on the light guide plate. The roller 139 can reduce the friction between the mounting seat 137 and the light guide plate, thereby ensuring the safety of the light guide plate. The movement of the mounting seat 137 drives the porous hollow plate 13 to move horizontally. Then, start the refrigeration box 133. There is a large amount of cold air in the refrigeration box 133. Then, start the air extraction pump 132. The air extraction pump 132 pumps the cold air in the refrigeration box 133 into the connecting pipe 131 through the corrugated hose 134. The cold air in the connecting pipe 131 is discharged into the porous hollow plate 13. The porous hollow plate 13 sprays the cold air on the position of the light guide plate where laser cutting is performed.The cooling air immediately cools the position of the light guide plate cut by the laser to prevent the high temperature during laser cutting from damaging the light guide plate and affecting the light guide uniformity, thereby ensuring the safety of laser cutting of the light guide plate. When the light guide plate is laser cut into the required shape and size, the laser cutting head 5, the biaxial moving machine 4, and the air extraction pump 132 are turned off, and the porous hollow plate 13 stops spraying the cooling air. At this time, the light guide plate cut by the laser and the waste material are on the grid plate 6. The air cylinder 135 is started to drive the n-shaped rack 136 to move upward. The upward movement of the n-shaped rack 136 causes the connecting spring 1361 to stretch and reset. The n-shaped rack 136 drives the spur gear 138 to rotate reversely. The reverse rotation of the spur gear 138 drives the porous hollow plate 13 to swing upward and reset first, and then the n-shaped rack 136 drives the mounting seat 137 to move upward and reset through the connecting spring 1361. The mounting seat 137 drives the porous hollow plate 13 and the roller 139 to move upward and reset. The roller 139 resets and disengages from the light guide plate. The cover plate 3 is pulled upward to swing open, and then the waste material and the light guide plate cut by the laser are removed from the grid plate 6, and the laser-cut light guide plate is used subsequently. When all the light guide plates are laser cut, the refrigeration box 133 is turned off. In this way, through the function of the positioning plate 9, the light guide plate after being placed can be automatically corrected and positioned, so that there is no need for the operator to manually correct and position the light guide plate, thereby reducing the labor intensity of the operator and improving the effect of laser cutting.

[0033] Please refer to Figure 7 As shown, the laser cutting device for the light guide plate of the backlight module further includes a discharging component installed between the base 1 and the grid plate 6. The discharging component includes a guide rod 14, a push plate 141, a lead screw 142, and a driving motor 143. The left part of the front side of the grid plate 6 is fixedly connected with the guide rod 14. The push plate 141 is slidably sleeved on the guide rod 14. The push plate 141 is in contact and cooperation with the grid plate 6. When the push plate 141 moves forward, the push plate 141 can push the waste material and the light guide plate cut by the laser forward to complete discharging. The right part of the front side of the grid plate 6 is rotatably connected with the lead screw 142. The lead screw 142 is threadedly connected with the right side of the push plate 141. The driving motor 143 is installed at the right rear side of the top of the base 1. The end of the output shaft of the driving motor 143 is fixedly connected with the rear end of the lead screw 142.

[0034] Please refer to Figure 8 and Figure 9As shown, the laser cutting device for the light guide plate of the backlight module also includes a cleaning component installed between the housing 2 and the push plate 141, the cleaning component includes a horizontal plate 15, a reset spring 151, a vertical rod 152, a buffer spring 153, a wiping plate 154 and a trigger component, the housing 2 is slidably connected to the front side with the horizontal plate 15, the bottom of the horizontal plate 15 and the top front side of the base 1 are symmetrically connected with the reset spring 151, the horizontal plate 15 is symmetrically slidably penetrated with the vertical rod 152 on the horizontal plate 15, and the wiping plate 154 is fixedly connected between the bottom ends of the vertical rods 152 on the left and right sides. When the wiping plate 154 contacts the light guide plate cut by the laser, the wiping plate 154 can remove the debris attached to the light guide plate. A buffer spring 153 is symmetrically connected between the top of 54 and the bottom of the horizontal plate 15. A trigger assembly is arranged between the horizontal plate 15 and the push plate 141. When the trigger assembly is operated, the trigger assembly can drive the horizontal plate 15 to move downward. The trigger assembly includes an L-shaped rod 155 and a trigger plate 156. The L-shaped rod 155 is fixedly connected to the right side of the bottom of the horizontal plate 15, and the trigger plate 156 is fixedly connected to the right side of the bottom of the push plate 141. The trigger plate 156 is located in the grid plate 6. The front side of the trigger plate 156 is an inclined surface. The inclined surface of the trigger plate 156 contacts the lower part of the L-shaped rod 155. When the trigger plate 156 moves forward, the trigger plate 156 can drive the L-shaped rod 155 to move downward, so that the horizontal plate 15 moves downward.

[0035] When the light guide plate has completed laser cutting, the waste and the laser-cut light guide plate are on the grid plate 6. The cover plate 3 is pulled upward to swing open, and the drive motor 143 is started to drive the screw rod 142 to rotate forward. The screw rod 142 rotates forward to drive the push plate 141 to move forward. The guide rod 14 guides the push plate 141, and the push plate 141 moves forward to contact the waste and the laser-cut light guide plate. The push plate 141 pushes the waste and the laser-cut light guide plate forward. When the waste and the laser-cut light guide plate move forward and lose contact with the grid plate 6, the waste and the laser-cut light guide plate fall down for collection. In this way, the unloading process of the waste and the laser-cut light guide plate is completed, and the drive motor 143 is started again to drive the screw rod 142 to reverse. The screw rod 142 reverses and drives the push plate 141 to move backward and reset, and the drive motor 143 is turned off. In this way, the operator does not need to manually remove the waste materials and the laser-cut light guide plates, which makes it more convenient for the operator to collect and process the waste materials and the laser-cut light guide plates, thereby improving the collection efficiency.

[0036] When the push plate 141 moves forward, the push plate 141 drives the trigger plate 156 to move forward. The forward movement of the trigger plate 156 drives the L-shaped rod 155 to move downward. The downward movement of the L-shaped rod 155 drives the cross plate 15 to move downward, and the return spring 151 is compressed. The downward movement of the cross plate 15 drives the wiping plate 154 to move downward through the buffer spring 153. The wiping plate 154 moves downward and contacts the guide plate, and the wiping plate 154 stops moving downward. The cross plate 15 continues to move downward to compress the buffer spring 153. The trigger plate 156 continues to move forward so that the inclined surface is disengaged from the L-shaped rod 155. The trigger plate 156 stops driving the L-shaped rod 155 to continue moving downward, and the L-shaped rod 155 stops driving the cross plate 15 to move downward. At the same time, the push plate 141 pushes the waste material and the light guide plate to move forward, and the wiping plate 154 removes the debris attached to the light guide plate due to laser cutting. When the waste material and the light guide plate are pushed out from the grid plate 6, the light guide plate is disengaged from the wiping plate 154, and the driving motor 143 can be started to drive the lead screw 142 to reverse. The reverse rotation of the lead screw 142 drives the push plate 141 to move backward and reset. The reset of the push plate 141 drives the trigger plate 156 to move backward and reset. The reset of the trigger plate 156 stops limiting the L-shaped rod 155. Due to the action of the buffer spring 153, the cross plate 15 moves upward a certain distance first, and then due to the action of the return spring 151, the cross plate 15 moves upward and resets to drive the wiping plate 154 to move upward and reset through the buffer spring 153. In this way, it is possible to prevent debris from adhering to the light guide plate and affecting subsequent use, thus ensuring the smooth subsequent use of the light guide plate.

[0037] Please refer to Figure 10 As shown in the figure, the laser cutting device for the light guide plate of the backlight module further includes a collection box 17. A through groove 16 is opened on the front side of the top of the base 1. The through groove 16 can guide the debris. The collection box 17 is embedded and clamped on the front side of the base 1. The collection box 17 is communicated with the through groove 16. When the debris is discharged through the through groove 16, the collection box 17 can collect the debris.

[0038] When the wiping plate 154 removes the debris attached to the light guide plate, the removed debris falls into the through groove 16, and the debris in the through groove 16 falls into the collection box 17, and the collection box 17 collects the debris. When the collection box 17 contains an appropriate amount of debris, the collection box 17 is removed from the base 1 to pour out the debris for treatment. After all the debris is poured out, the collection box 17 is snapped back onto the base 1. In this way, it is possible to prevent the removed debris from remaining on the grid plate 6 and affecting the use environment, thus ensuring a clean use environment.

[0039] Finally, it is necessary to state that the above content is only used to help understand the technical solution of the present invention and should not be construed as a limitation on the protection scope of the present invention; any non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention fall within the scope required to be protected by the present invention.

Claims

1. A laser cutting device for a light guide plate of a backlight module, comprising a base (1) and a housing (2) fixedly connected to the base (1), a cover plate (3) being rotatably connected to the housing (2), a biaxial moving machine (4) being installed inside the housing (2), a laser cutting head (5) being installed on a moving part of the biaxial moving machine (4), a grid plate (6) located inside the housing (2) being fixedly connected to the base (1), characterized in that: The invention also comprises a movable plate (7) symmetrically slidably connected to the left and right sides of the top of the base (1); a guide rod (8) is slidably connected to the movable plate (7); a positioning plate (9) is fixedly connected between the ends of the front and rear guide rods (8); a rubber strip (11) is fixedly connected to the positioning plate (9) for buffering and protecting the light guide plate; a compression spring (10) is connected between the positioning plate (9) and the movable plate (7); a driving component is arranged between the base (1) and the movable plate (7); the driving component is arranged for driving the movable plates (7) on the left and right sides to move inward; the movable plate (7) drives the positioning plates (9) on the left and right sides to move inward through the compression spring (10), so that the positioning plate (9) corrects the deviation of the light guide plate; a cooling component is arranged between the housing (2) and the laser cutting head (5) for cooling the position on the light guide plate to be cut by the laser.

2. A laser cutting device for a light guide plate of a backlight module as claimed in claim 1, characterized in that: The driving assembly comprises a double-axis motor (12) installed inside the base (1), the output shaft end of the double-axis motor (12) is fixedly connected to a screw rod (121), the threads of the screw rods (121) on both sides are opposite, and the screw rods (121) are threadedly connected to the movable plate (7).

3. A laser cutting device for a light guide plate of a backlight module as claimed in claim 2, characterized in that: The cooling component comprises a refrigeration box (133) fixedly connected between the casing (2) and the base (1); an air extraction pump (132) is installed on the laser cutting head (5); an air inlet end of the air extraction pump (132) is connected to a corrugated hose (134); the tail end of the corrugated hose (134) slides through the casing (2) and is connected to the refrigeration box (133); an air outlet end of the air extraction pump (132) is connected to a connecting pipe (131); a porous hollow plate (13) is connected to the connecting pipe (131) so as to spray cold air to cool the laser-cut position of the light guide plate; and a moving component is arranged on the laser cutting head (5) for driving the porous hollow plate (13) to move.

4. A laser cutting device for a light guide plate of a backlight module as claimed in claim 3, characterized in that: The moving assembly comprises a cylinder (135) fixedly connected to the laser cutting head (5) at even intervals, an n-shaped rack (136) fixedly connected to the end of the telescopic rod of the cylinder (135), a fixed rod (1362) symmetrically fixedly connected to the n-shaped rack (136), a mounting seat (137) slidably mounted between the fixed rods (1362) on each n-shaped rack (136), and the mounting seat (137) is rotatably connected to the porous hollow plate (13) for driving The porous hollow plate (13) moves, a connecting spring (1361) sleeved on a fixing rod (1362) is symmetrically connected between the mounting seat (137) and the N-shaped rack (136), a roller (139) is symmetrically rotatably connected to the bottom of the mounting seat (137) for reducing the friction between the light guide plate and the mounting seat (137), and a spur gear (138) meshing with the N-shaped rack (136) is symmetrically fixedly sleeved on the shaft of the porous hollow plate (13).

5. A laser cutting device for a light guide plate of a backlight module as claimed in claim 4, characterized in that: The laser cutting device for the light guide plate of the backlight module also includes a discharge assembly, which includes a guide rod (14) fixedly connected to the grid plate (6), a push plate (141) slidably mounted on the guide rod (14) and in contact with the grid plate (6) to push the waste material and the light guide plate cut by the laser to complete the discharge, a screw rod (142) threadedly connected to the push plate (141) is rotatably connected to the grid plate (6), and a drive motor (143) is installed on the base (1), and the end of the output shaft of the drive motor (143) is fixedly connected to the end of the screw rod (142).

6. A laser cutting device for a light guide plate of a backlight module as claimed in claim 5, characterized in that: The laser cutting device for the light guide plate of the backlight module also includes a cleaning component, which includes a horizontal plate (15) slidably connected to the housing (2), a return spring (151) symmetrically connected between the horizontal plate (15) and the base (1), vertical rods (152) symmetrically slidably penetrate the horizontal plate (15), a wiping plate (154) is fixed between the bottom ends of the vertical rods (152) to clean debris attached to the light guide plate, a buffer spring (153) is symmetrically connected between the wiping plate (154) and the horizontal plate (15), and a trigger component is provided between the horizontal plate (15) and the push plate (141) to drive the horizontal plate (15) to move.

7. A laser cutting device for a light guide plate of a backlight module as claimed in claim 6, characterized in that: The trigger assembly comprises an L-shaped rod (155) fixedly connected to the bottom of the horizontal plate (15); a trigger plate (156) located in the grid plate (6) is fixedly connected to the push plate (141); the front side of the trigger plate (156) is an inclined surface; the inclined surface of the trigger plate (156) contacts the L-shaped rod (155) to drive the L-shaped rod (155) to move downward.

8. A laser cutting device for a light guide plate of a backlight module as claimed in claim 7, characterized in that: The laser cutting device for the light guide plate of the backlight module further comprises a collection frame (17) embedded and snap-connected to the base (1) for collecting debris, and a through slot (16) is formed on the top of the base (1) and communicates with the collection frame (17) for guiding the debris.

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