Laser cutting device for light guide plate of backlight module

Abstract

The present invention relates to the technical field of processing light guide plates of backlight modules, and in particular to a laser cutting device for light guide plates of backlight modules, comprising a base and a housing fixed to the base, a cover plate rotatably connected to the housing, and a dual-axis moving machine installed on the inner side of the housing. The present invention first places the light guide plate on a grid plate, then starts a dual-axis motor to drive the screw to rotate forward, the forward rotation of the screw drives the movable plate to move inward, the movable plate drives the positioning plate to move inward and contact the light guide plate through a compression spring, the positioning plate corrects and positions the light guide plate so that the light guide plate is aligned, then starts a laser cutting machine and a dual-axis moving machine, the dual-axis moving machine drives the laser cutting machine to perform laser cutting on the aligned light guide plate, in this way, through the action 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 and position the light guide plate, thereby reducing the operator's labor intensity and improving the effect of laser cutting.

Description

Technical Field

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

[0002] In the field of liquid crystal display technology, the backlight module is a key component to ensure that the liquid crystal panel displays images normally. As the core component of the backlight module, the light guide plate plays an especially critical 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, the light guide plate often needs to be cut.

[0003] A Chinese patent with announcement number CN218109692U discloses a high-speed laser cutting device for light guide plate processing, including a box body, a fixed plate fixedly connected to the top of the box body, a shell fixedly connected to the left side of the top of the fixed plate, a motor fixedly installed on one side of the shell, a threaded rod fixedly connected to the output end of the motor, a threaded sleeve threadedly connected to the surface of the threaded rod, a fixed rod fixedly connected to the top of the threaded sleeve, a cross plate fixedly connected to the top of the fixed rod, and a laser fixedly installed on one side of the top of the cross plate. Although the above patent can perform laser cutting on light guide plates, it is necessary to manually place the light guide plate and then adjust and align it so that the aligned light guide plate is in a precise position for laser cutting, which increases the labor intensity of the operator, and the light guide plate is not accurately placed due to human factors, which affects the laser cutting effect.

[0004] The present invention aims to solve the problems existing in the above-mentioned patents. To this end, a laser cutting device for a backlight module light guide plate is proposed, which can automatically correct the positioning of 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 need to manually adjust and align the light guide plate after placement so that the aligned light guide plate is in a precise position for laser cutting, which increases the labor intensity of the operator and causes the light guide plate to be placed inaccurately due to human factors, thereby affecting the laser cutting effect, the present invention provides a laser cutting device for the light guide plate of a backlight module, which can automatically correct 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:

[0007] A laser cutting device for a light guide plate of a backlight module comprises a base and a casing fixed to the base, a cover plate rotatably connected to the casing, a dual-axis movable machine installed inside the casing, a laser cutting head installed on the movable component of the dual-axis movable machine, a grid plate located in the casing fixedly connected to the base, and also comprises movable plates symmetrically slidably connected to the left and right sides of the top of the base, guide rods slidingly penetrated the movable plates, a positioning plate fixedly connected between the ends of the front and rear guide rods, a rubber strip fixedly connected to the positioning plate for buffering and protecting the light guide plate, a compression spring connected between the positioning plate and the movable plate, a driving assembly arranged between the base and the movable plate, the driving assembly being used to drive the left and right movable plates to move inward, the movable plate drives the left and right positioning plates to move inward through the compression spring, so that the positioning plate corrects and positions the light guide plate, and a cooling assembly is arranged between the casing and the laser cutting head for cooling the position on the light guide plate to be laser cut.

[0008] To further explain, the drive assembly includes a dual-axis motor installed on the inner side of the base, and the output shaft end of the dual-axis motor is fixedly connected to a screw, the threads of the screws on both sides are opposite, and the screws are threadedly connected to the movable plate.

[0009] Further explanation, the cooling component includes a refrigeration box fixed between the casing and the base, an exhaust pump is installed on the laser cutting head, the air inlet end of the exhaust pump is connected to a corrugated hose, the tail end of the corrugated hose slides through the casing and is connected to the refrigeration box, the air outlet end of the exhaust pump is connected to a connecting pipe, and a porous hollow plate is connected to the connecting pipe to spray cold air to cool the laser-cut position of the light guide plate, and a moving component is provided on the laser cutting head to drive the porous hollow plate to move.

[0010] Further explanation, the moving assembly includes a cylinder fixed to the laser cutting head at uniform intervals, the telescopic rod end of the cylinder is fixed with an N-type rack, and a fixed rod is symmetrically fixed to the N-type rack. A mounting seat is slidingly mounted between the fixed rods on each N-type rack, and the mounting seat is rotatably connected to the porous hollow plate to drive the porous hollow plate to move. A connecting spring mounted on the fixed rod is symmetrically connected between the mounting seat and the N-type rack, and a roller is symmetrically rotatably connected to the bottom of the mounting seat to reduce the friction between the light guide plate and the mounting seat. A spur gear meshing with the N-type rack is symmetrically fixed on the axis of the porous hollow plate.

[0011] Further explanation, the laser cutting device for the light guide plate of the backlight module also includes a unloading assembly, which includes a guide rod fixedly connected to the grid plate, and a push plate slidingly mounted on the guide rod that contacts and cooperates with the grid plate to push the waste and the light guide plate cut by the laser to complete the unloading, and a screw rod rotatably connected to the grid plate and threadedly connected to the push plate, and a drive motor is installed on the base, and the output shaft end of the drive motor is fixedly connected to the end of the screw rod.

[0012] 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 slidingly connected on the horizontal plate, and a wiping plate fixed between the bottom ends of the vertical rods to clean the debris attached to the light guide plate, a buffer spring symmetrically connected between the wiping plate and the horizontal plate, and a trigger component is arranged between the horizontal plate and the push plate to drive the horizontal plate to move.

[0013] To further explain, the trigger assembly includes an L-shaped rod fixed to the bottom of the horizontal plate, and 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.

[0014] To further explain, 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 slot connected to the collection frame is provided on the top of the base for guiding the debris.

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

[0016] 1. First place the light guide plate on the grid plate, then start the dual-axis motor to drive the screw to rotate forward, and the forward rotation of the screw drives 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 and positions the light guide plate so that the light guide plate is straightened. 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 action 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.

[0017] 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 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.

[0018] 3. Under the action of the push plate, every time the light guide plate is completed by laser cutting, the push plate can move the laser-cut light guide plate and waste forward to complete the unloading. In this way, there is no need for the operator 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

[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 dual-axis moving machine and the laser cutting head of the present invention.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the guide rod, positioning plate and compression spring of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the cooling assembly of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the cylinder, n-shaped rack and mounting seat of the present invention.

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

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the unloading assembly of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the cleaning component of the present invention.

[0027] Figure 9 It is a schematic diagram of the three-dimensional structure of the buffer spring of the present invention.

[0028] Figure 10 It is a schematic diagram of the three-dimensional structure of the through slot and the collecting frame of the present invention.

[0029] In the accompanying drawings: 1-base, 2-housing, 3-cover, 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, 13-porous hollow plate, 131-connecting pipe, 132-vacuum pump, 133-refrigeration box, 134-corrugated hose, 135-cylinder, 136-n Type rack, 1361-connecting spring, 1362-fixing rod, 137-mounting seat, 138-spur gear, 139-roller, 14-guide rod, 141-push plate, 142-screw rod, 143-drive motor, 15-horizontal plate, 151-reset spring, 152-vertical rod, 153-buffer spring, 154-wiping plate, 155-L-shaped rod, 156-trigger plate, 16-through slot, 17-collection frame. DETAILED DESCRIPTION

[0030] First of all, it should be noted that in the various described embodiments, identical components are provided with identical reference numerals or identical component names, wherein the disclosure contained throughout the entire description can be transferred to the same components having the same reference numerals or identical component names. Positional designations selected in the description, such as top, bottom, lateral, etc., also refer to the directly described and illustrated figures and are transferred to the new position in the event of a change in position.

[0031] Example: A laser cutting device for a light guide plate of a backlight module, see Figures 1-6 As shown, it includes a base 1 and a casing 2 fixed to the top of the base 1, a cover plate 3 is rotatably connected to the middle of the front side of the casing 2, a two-axis mobile machine 4 is installed on the inside of the casing 2, and a laser cutting head 5 is installed on the moving part of the two-axis mobile machine 4. A grid plate 6 is fixed to the top of the base 1, and the grid plate 6 is located in the casing 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 drive component and a cooling component. The left and right sides of the top of the base 1 are symmetrically connected to the movable plate 7 for sliding. The upper part of the movable plate 7 is slidably connected with the guide rod 8. A positioning plate 9 is fixed between the inner ends of the guide rods 8 on the front and rear sides, and the sides of the positioning plates 9 on the left and right sides that are close to each other are fixed with rubber strips. Strip 11, when the rubber strip 11 contacts the light guide plate, the rubber strip 11 can achieve buffering protection for the light guide plate, and compression springs 10 are connected between the sides of the left and right positioning plates 9 that are away from each other and the sides of the left and right movable plates 7 that are close to each other. A driving component is provided between the base 1 and the movable plate 7, and 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 the position of the light guide plate. A cooling component is provided between the casing 2 and the laser cutting head 5. When the cooling component is in operation, the cooling component can cool the position on the light guide plate that is laser cut.

[0032] See also Figure 3 As shown, the driving assembly includes a dual-axis motor 12 and a screw 121. The dual-axis motor 12 is installed on the inner front of the base 1. The output shaft ends on the left and right sides of the dual-axis motor 12 are fixed with screws 121. The threads of the left and right screws 121 are opposite. The left and right screws 121 are respectively threadedly connected to the lower part of the left and right movable plates 7 in front. The screw 121 can drive the movable plate 7 to move, so that the positioning plate 9 moves to correct the position of the light guide plate.

[0033] See also Figure 4-Figure 6As shown, the cooling assembly includes a porous hollow plate 13, a connecting pipe 131, an air pump 132, a refrigeration box 133, a corrugated hose 134 and a moving assembly. The refrigeration box 133 is fixedly connected between the outer rear side of the casing 2 and the rear side of the base 1. The air pump 132 is installed on the upper rear side of the laser cutting head 5. The air inlet end of the air pump 132 is connected to the corrugated hose 134. The tail end of the corrugated hose 134 slides through the rear side of the casing 2 and is connected to the upper front side of the refrigeration box 133. The outlet of the air pump 132 The air end is connected to a connecting pipe 131, and the connecting pipe 131 is connected to four porous hollow plates 13. When the cold air is discharged into the porous hollow plates 13, the porous hollow plates 13 can spray the cold air to cool the laser cutting position of the light guide plate. The laser cutting head 5 is provided with a moving component. When the moving component is in operation, the moving component can drive the porous hollow plates 13 to move; the moving component includes a cylinder 135, an n-type rack 136, a connecting spring 1361, a fixing rod 1362, an installation The bottom of the laser cutting head 5 is fixed with four cylinders 135 at even intervals, and the ends of the telescopic rods of the four cylinders 135 are fixed with n-shaped racks 136. The top of the n-shaped racks 136 is symmetrically fixed with fixed rods 1362. A mounting seat 137 is slidably set between the two fixed rods 1362 inside each n-shaped rack 136. The mounting seat 137 is rotatably connected to the bottom of the porous hollow plate 13, and the mounting seat 137 can drive the porous hollow plate 13. The core plate 13 moves, and a connecting spring 1361 is symmetrically connected between the top of the mounting seat 137 and the top of the N-type rack 136. The connecting spring 1361 is sleeved on the fixing rod 1362. The bottom of the mounting seat 137 is symmetrically rotated and connected with a roller 139. The roller 139 can reduce the friction between the light guide plate and the mounting seat 137 to protect the light guide plate. A spur gear 138 is symmetrically fixed on the axis of the porous hollow plate 13, and the spur gear 138 is engaged with the N-type rack 136.

[0034] First, pull the cover plate 3 upward to swing open, then place the light guide plate on the grid plate 6, the guide plate is between the left and right positioning plates 9, pull the cover plate 3 downward to swing close, then start the dual-axis motor 12 to rotate forward, the dual-axis motor 12 drives the left and right screws 121 to rotate forward, the left and right screws 121 rotate forward 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, the left and right positioning plates 9 drive the left and right rubber strips 11 to move inward, the rubber strips 11 move inward and contact the light guide plate, the positioning plate 9 corrects the position of the light guide plate through the rubber strips 11, so that the light guide plate is in the correct position, and the light guide plate is clamped and fixed, and due to the action of the rubber strips 11, the light guide plate can be The positioning plate 9 stops moving after correcting the deviation of the light guide plate, and the movable plate 7 continues to move inward to compress the compression spring 10, and the dual-axis motor 12 is turned off. The movable plate 7 stops moving. Due to the action of the compression spring 10, the positioning plate 9 can clamp the light guide plate more firmly. At the same time, the cylinder 135 is started, and the telescopic rod of the cylinder 135 is extended to drive the n-type rack 136 to move downward. The n-type rack 136 moves downward and drives the mounting seat 137 to move downward through the connecting spring 1361. The mounting seat 137 moves downward and 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-type rack 136. When the roller 139 moves downward and When the guide plates are in contact, the roller 139 stops moving downward, the roller 139 stops the mounting seat 137 from moving downward, the mounting seat 137 stops driving the porous hollow plate 13 to move downward, the n-type rack 136 continues to move downward to compress the connecting spring 1361, the n-type rack 136 continues to move downward to drive the spur gear 138 to rotate, the spur gear 138 rotates to drive 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, the cylinder 135 is closed, the laser cutting head 5 and the dual-axis moving machine 4 can be started, the dual-axis moving machine 4 drives the laser cutting head 5 to move, the laser cutting head 5 moves to perform laser cutting on the light guide plate after the correction and positioning, so that the light guide plate is laser cut into the required shape and size, and the laser cutting The cutting head 5 moves through the cylinder 135, the n-shaped rack 136 and the fixed rod 1362 to drive the mounting seat 137 to move, and 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, and the refrigeration box 133 can be started. There is a large amount of cold air in the refrigeration box 133, and then the air pump 132 is started. The air pump 132 draws the cold air in the refrigeration box 133 into the connecting pipe 131 through the corrugated hose 134, and the cold air in the connecting pipe 131 is discharged into the porous hollow plate 13, and the porous hollow plate 13 sprays the cold air on the position where the light guide plate is laser cut.The cold air immediately cools down the position where the light guide plate is cut by the laser to prevent the high temperature during laser cutting from damaging the light guide plate and affecting the uniformity of the light guide, thereby ensuring the safety of the laser cutting of the light guide plate. When the light guide plate is cut into the required shape and size by laser, the laser cutting head 5, the biaxial moving machine 4 and the vacuum pump 132 are turned off, and the porous hollow plate 13 stops ejecting the cold air. At this time, the light guide plate cut by the laser and the waste are on the grid plate 6, and the cylinder 135 is started to drive the n-type rack 136 to move upward. The n-type rack 136 moves upward to make the connecting spring 13 61 stretches and resets, the n-type rack 136 drives the spur gear 138 to rotate in the opposite direction, and the spur gear 138 rotates in the opposite direction to drive the porous hollow plate 13 to swing upward and reset first, and then the n-type rack 136 drives the mounting seat 137 to move upward and reset through the connecting spring 1361, and the mounting seat 137 drives the porous hollow plate 13 and the roller 139 to move upward and reset, and the roller 139 resets and disengages from the light guide plate, pulling the cover plate 3 to swing upward and open, and then the waste and the laser-cut guide plate are removed from the grid plate 6, and the laser-cut light guide plate is used later. When all the light guide plates are laser cut, the refrigeration box 133 is closed. In this way, through the action of the positioning plate 9, the placed light guide plate can be automatically corrected and positioned, so that the operator does not need to manually correct the position of the light guide plate, thereby reducing the operator's labor intensity and improving the effect of laser cutting.

[0035] See also Figure 7 As shown, the laser cutting device for the light guide plate of the backlight module also includes a unloading assembly installed between the base 1 and the grid plate 6, the unloading assembly includes a guide rod 14, a push plate 141, a screw 142 and a drive motor 143, the left front side of the grid plate 6 is fixedly connected to the guide rod 14, and a push plate 141 is slidably mounted on the guide rod 14, and the push plate 141 is in contact with the grid plate 6. When the push plate 141 moves forward, the push plate 141 can push the waste and the light guide plate cut by the laser forward to complete the unloading, the right front side of the grid plate 6 is rotatably connected to the screw 142, and the screw 142 is threadedly connected to the right side of the push plate 141, and a drive motor 143 is installed on the right rear side of the top of the base 1, and the output shaft end of the drive motor 143 is fixedly connected to the rear end of the screw 142.

[0036] See also 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 return spring 151, a vertical rod 152, a buffer spring 153, a wiping plate 154 and a trigger component, the front side of the housing 2 is slidably connected to the horizontal plate 15, the bottom of the horizontal plate 15 and the front side of the top of the base 1 are symmetrically connected with the return spring 151, the horizontal plate 15 is symmetrically slidably connected with the vertical rod 152 on the horizontal plate 15, and the wiping plate 154 is fixed 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 provided 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.

[0037] When the light guide plate has completed laser cutting, the waste and the laser-cut light guide plate are on the grid plate 6, and 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, and the screw rod 142 rotates forward to drive the push plate 141 to move forward, and 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, and 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 are out of contact with the grid plate 6, the waste and the laser-cut light guide plate fall down for collection, and 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, and 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.

[0038] When the push plate 141 moves forward, the push plate 141 drives the trigger plate 156 to move forward, and the trigger plate 156 moves forward to drive the L-shaped rod 155 to move downward, and the L-shaped rod 155 moves downward to drive the cross plate 15 to move downward, and the return spring 151 is compressed. The cross plate 15 moves downward and 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, and the trigger plate 156 continues to move forward so that the inclined surface is out of contact with the L-shaped rod 155. The trigger plate 156 stops driving the L-shaped rod 155 to continue to move 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 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 of the grid plate 6, the light guide plate and the wiping plate 154 are out of contact, and the drive motor 143 can be started to drive the screw rod 142 to reverse. The screw rod 142 reverses and drives the push plate 141 to move backward and reset. The push plate 141 resets and drives the trigger plate 156 to move backward and reset. The trigger plate 156 resets and stops to limit the L-shaped rod 155. Due to the action of the buffer spring 153, the cross plate 15 first moves upward for a distance. Then, due to the action of the reset spring 151, the cross plate 15 moves upward and resets, and the buffer spring 153 drives the wiping plate 154 to move upward and reset. In this way, debris attached to the light guide plate can be prevented from affecting subsequent use, thereby ensuring the smooth subsequent use of the light guide plate.

[0039] See also Figure 10 As shown, the laser cutting device for the light guide plate of the backlight module also includes a collection frame 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 front side of the base 1 is embedded with a collection frame 17, and the collection frame 17 is connected to the through groove 16. When the debris is discharged through the through groove 16, the collection frame 17 can collect the debris.

[0040] When wiping plate 154 removes debris from the light guide plate, the removed debris falls into through-slot 16. The debris in through-slot 16 then falls into collection frame 17, where it is collected. When collection frame 17 is filled with an appropriate amount of debris, it is removed from base 1 to empty the debris. After all the debris has been emptied, collection frame 17 is snapped back onto base 1. This prevents the removed debris from remaining on grid plate 6 and affecting the user environment, thereby ensuring a clean user environment.

[0041] 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 this field based on the above content of the present invention are all within the scope of protection required 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) rotatably connected to the housing (2), a biaxial moving machine (4) installed inside the housing (2), a laser cutting head (5) installed on a moving part of the biaxial moving machine (4), a grid plate (6) located inside the housing (2) fixedly connected to the base (1), characterized in that: The light guide plate (1) is provided with a plurality of movable plates (7) symmetrically 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 fixed between the ends of the front and rear guide rods (8), a rubber strip (11) is fixed 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 assembly is provided between the base (1) and the movable plate (7), the driving assembly is used to drive 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, and a cooling assembly is provided between the housing (2) and the laser cutting head (5) for cooling the position on the light guide plate that is cut by the laser. The cooling assembly includes a refrigeration box (133) fixed between the housing (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 housing (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 eject cold air to cool the laser-cut position of the light guide plate; and a moving assembly is provided on the laser cutting head (5) for driving the porous hollow plate (13) to move; The moving assembly includes a cylinder (135) fixed to the laser cutting head (5) at uniform intervals, an n-shaped rack (136) fixed to the end of the telescopic rod of the cylinder (135), a fixed rod (1362) symmetrically fixed to the n-shaped rack (136), a mounting seat (137) is 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 connected to the bottom of the mounting seat (137) for rotating, and is used to reduce 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); The laser cutting device for the light guide plate of the backlight module further comprises a discharge assembly, the discharge assembly comprising 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), a driving motor (143) is mounted on the base (1), and the output shaft end of the driving motor (143) is fixedly connected to the end of the screw rod (142); The laser cutting device for the light guide plate of the backlight module further comprises a cleaning component, the cleaning component comprising 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), a vertical rod (152) symmetrically slidably penetrated on the horizontal plate (15), a wiping plate (154) fixed between the bottom ends of the vertical rod (152) for cleaning debris attached to the light guide plate, a buffer spring (153) symmetrically connected between the wiping plate (154) and the horizontal plate (15), and a trigger component provided between the horizontal plate (15) and the push plate (141) for driving the horizontal plate (15) to move; The trigger assembly includes 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.

2. The laser cutting device for a light guide plate of a backlight module according to claim 1, wherein: The driving assembly includes a double-axis motor (12) installed inside the base (1), the output shaft end of the double-axis motor (12) is fixedly connected with a screw (121), the threads of the screws (121) on both sides are opposite, and the screws (121) are threadedly connected to the movable plate (7).

3. The laser cutting device for a light guide plate of a backlight module according to claim 1, wherein: The laser cutting device for the light guide plate of the backlight module further comprises a collection frame (17) embedded and clamped on 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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