Backlight flexible circuit board and light guide plate attaching equipment

Abstract

The invention relates to the technical field of backlight preparation, in particular to backlight flexible circuit board and light guide plate attaching equipment which comprises a rack, a first air cylinder, a suction cup, a first connecting rod and a hook claw. A conveying belt is installed on the rack, the upper side of the conveying belt is used for containing a back plate, the back plate is used for containing a flexible circuit board, and the first air cylinder is horizontally installed on the rack in a sliding mode; a suction cup is connected below the first air cylinder and used for adsorbing a light guide plate, a clamping assembly and a lifting assembly are installed on the rack, hook claws are symmetrically arranged on the rack, each hook claw comprises a contact part and a supporting part, the supporting parts are in sliding connection with the rack and connected with the lifting assembly and the clamping assembly, and the contact parts are used for being connected with a flexible circuit board. The lifting assembly and the clamping assembly drive the claw to clamp and lift the flexible circuit board away from the horizontal projection plane of the light guide plate on the back plate, so that the flexible circuit board is prevented from being damaged due to extrusion when the light guide plate is installed.

Description

Technical Field

[0001] The invention relates to the technical field of backlight source preparation, in particular to a backlight source flexible circuit board and light guide plate pasting device. Background Art

[0002] The backlight module is one of the key components of the liquid crystal display panel. Its function is to supply sufficient brightness and evenly distributed light source so that it can display images normally. The backlight module includes side light type and direct light type. The direct light backlight module is assembled by stacking a backplane, a reflective sheet, a flexible circuit board, a light guide plate and a diffuser. The backplane provides support and protection. The flexible circuit board is installed in the backplane to provide electrical connection and emit light through the light-emitting unit. The light guide plate evenly distributes light, the reflective sheet improves the light utilization efficiency, and the diffuser diffuses or brightens the light. In the production process of the backlight module, the deviation caused by the workers during installation and the uneven pressure applied during installation will cause the diaphragm to not fit tightly. When the light passes through these poorly fitted areas, the brightness will be uneven due to differences in scattering angles and degrees.

[0003] For the above problems, the prior art provides a solution. For example, patent application number CN201510157404.6 provides an FPC light guide plate laminating machine. The patent uses an FPC light guide plate laminating machine, including an upper cabinet and a lower cabinet, including a first feeding device, a second feeding device, and a third feeding device fixedly arranged on the lower cabinet, a first picking device, a second picking device, and a third picking device, a first static electricity removal device, a second static electricity removal device, a 2CCD image alignment device, an FPC light guide plate laminating device, a discharging device and an upper frame, wherein the first picking device, the second picking device, the third picking device, the 2CCD image alignment device, and the FPC light guide plate laminating device are located in the first feeding device, the second picking device, the third picking device, the 2CCD image alignment device, and the FPC light guide plate laminating device. Above the second feeding device and the third feeding device, the present invention can overcome the technical deficiencies of existing manual operations and improve production capacity; there is no need for manual bonding at all, accurate process parameters can be obtained, and the production conversion is convenient and efficient. In addition, the problems of low consistency and low efficiency of manual operations can be solved. However, in the actual production of the backlight module, part of the flexible circuit board will be reserved for subsequent installation and use, that is, part of the flexible circuit board is installed in the back panel, and the reserved part of the flexible circuit is installed on the light guide plate. Due to its own flexible characteristics and the action of the back panel frame, the flexible circuit board bends in the direction of the light guide plate. In the subsequent bonding and installation process of the light guide plate, the moving path of the light guide plate will be blocked, which can easily lead to deformation of the circuit board and damage to the circuit, causing short circuit and signal transmission failure. Summary of the invention

[0004] The purpose of the present invention is to provide a backlight flexible circuit board and light guide plate bonding device to solve the problem that the reserved part of the flexible line will block the moving path of the light guide plate during the bonding and installation process of the light guide plate, which may easily cause the circuit board to deform and the line to be damaged, causing short circuit and signal transmission failure.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A light guide plate attaching device comprises a frame, a first cylinder, a suction cup, a No. 1 connecting rod and a hook claw, a conveyor belt is horizontally mounted on the frame, the upper side of the conveyor belt is used to place a back plate, the back plate is used to place a flexible circuit board, a first cylinder is horizontally slidably mounted on the frame, a suction cup is connected below the first cylinder, the suction cup is used to adsorb the light guide plate, and the device is characterized in that a clamping assembly and a lifting assembly are mounted on the frame, a hook claw is symmetrically arranged on the frame, the hook claw is connected to the frame through a No. 1 connecting rod, the hook claw comprises a contact portion and a supporting portion, the supporting portion is slidably connected to the frame, the supporting portion is respectively connected to the lifting assembly and the adding and taking assembly, the contact portion is used to connect to the flexible circuit board, the clamping assembly is used to drive the hook claw to move the contact portion below the flexible circuit board, and the lifting assembly is used to drive the hook claw to lift when the contact portion moves below the flexible circuit board.

[0007] It is easy to understand that when the light guide plate is to be installed in the back plate, the bottom is first placed on the conveyor belt. Under the action of the conveyor belt, the back plate moves forward with the conveyor belt. When the set position is reached, the conveyor belt stops. At this time, the suction cup sucks up the external light guide plate, and then controls the first cylinder to move to the top of the back plate. The light guide plate is placed in the back plate by extending the first cylinder. The clamping component is triggered during the descent of the light guide plate. The clamping component acts on the supporting part on the claw, so that the contact part is connected to the lower end surface of the circuit board. At the same time, the operation of the lifting component drives the supporting part to lift, thereby lifting the flexible circuit board and leaving the horizontal projection plane of the light guide plate on the back plate. The lifting component and the clamping component drive the claw to clamp and lift the flexible circuit board away from the horizontal projection plane of the light guide plate on the back plate, thereby avoiding squeezing the flexible circuit board when the light guide plate is installed, and ensuring that the physical integrity and electrical performance of the flexible circuit board are not damaged.

[0008] Preferably, the gripping assembly includes a second cylinder, a piston, a No. 1 guide block, a push block, a push rod, a No. 1 spring, a sliding rod and a No. 2 spring. The second cylinder is horizontally mounted on the frame. A sliding hole is provided in the second cylinder. An air inlet is provided at one end of the sliding hole. A piston is slidably mounted in the sliding hole. The second cylinder is connected to one end of the piston via a No. 1 spring. A No. 1 sliding groove is provided on the upper end surface of the second cylinder parallel to the axis of the sliding hole. The No. 1 sliding groove is connected to the sliding hole. A No. 1 guide block is provided on the side wall of the piston. A push block is slidably mounted on the upper end surface of the second cylinder. The sliding direction of the push block is perpendicular to the axis of the second cylinder. The push block is provided with a No. 1 guide groove, and the No. 1 guide groove is inclined. The No. 1 guide block is slidably connected with the No. 1 slide groove and the No. 1 guide groove respectively. Guide surfaces are provided on both sides of the push block, and a push rod is provided on the inner side of the hook claw. A mating surface is provided at one end of the push rod, and the guide surface and the mating surface are slidably connected. The sliding rod is slidably installed on the frame and is slidably connected with the hook claw. The hook claws are connected by a No. 2 spring. A clamping groove is provided at the connection between the hook claw and the frame, and the hook claw is slidably installed in the clamping groove.

[0009] When the first cylinder is descending, the high-pressure airflow is controlled to enter the slide hole through the air inlet hole. At this time, the high-pressure airflow acts on the piston, and the piston moves, driving the No. 1 guide block to slide in the No. 1 slide groove and the No. 1 guide groove. Since the push block is slidably installed on the piston and the No. 1 guide groove is inclined, at this time, under the action of the No. 1 guide groove, the push block slides in the direction perpendicular to the axis of the slide hole. At the same time, under the contraction of the No. 2 spring, the hook claw slides in the clamping groove. At the same time, the push rod on the hook claw gradually approaches, and the contact area between the guide surface on the push block and the matching surface on the push rod gradually decreases until the end face of the push rod contacts, and the guide surface and the matching surface are separated. At this time, the contact part moves to the lower end face of the flexible circuit board to fit it, and the pressure of the high-pressure airflow is used to drive the contact part on the hook claw to move to the lower end face of the flexible circuit board to fit it, preparing for the subsequent lifting of the flexible circuit board.

[0010] Furthermore, when the first cylinder installs the light guide plate in the back plate, the suction cup is separated from the light guide plate, and the first cylinder moves upward and leaves the back plate. At this time, the high-pressure airflow stops entering the slide hole, and the elastic potential energy of the No. 2 spring squeezed by the piston is released, pushing the piston to discharge the high-pressure airflow in the slide hole from the air inlet. At this time, the No. 1 guide block slides in the No. 1 slide groove and the No. 1 guide groove. At this time, the guide surface and the mating surface are reconnected. Under the push of the No. 1 spring, the push rod is separated, the No. 2 spring is stretched, and the contact part is separated from the flexible circuit board at the same time. The hook leaves the light guide plate on the horizontal projection plane, and prepares for the installation of the next group of light guide plates through the No. 1 guide block.

[0011] Preferably, the lifting assembly includes a lifting block, one side of the lifting block is connected to the piston axis, the upper end of the lifting block is provided with an inclined surface, the inclined surface is close to the piston side as a high point, the inclined surface is slidably connected to the lower end surface of the supporting part of the hook claw, and a No. 2 guide groove is provided at the connection between the hook claw and the frame, the No. 1 connecting rod and the sliding rod are slidably installed in the No. 2 guide groove, the No. 2 guide groove includes a lifting section and a evacuation section, the lifting section is connected to the evacuation section, the lifting section is vertically arranged, the length of the lifting section is higher than the height of the back plate, the evacuation section is inclined, and the inclination direction is away from the back plate, and the projection of the No. 2 guide groove is located within the vertical plane projection of the clamping groove.

[0012] While the contact portion is in contact with the flexible circuit board, the piston pushes the lifting block connected thereto to move. At this time, the lower end surface of the hook claw support portion contacts the low point of the inclined surface on the lifting block. With the movement of the lifting block and the action of the inclined surface, the horizontal movement of the lifting block is converted into the upward movement of the hook claw. At this time, the hook claw is lifted under the guidance of the lifting section on the No. 2 guide groove. As the lifting block continues to move, it comes to the withdrawal section. Under the guidance of the hook claw, it leaves the horizontal projection surface of the light guide plate on the back plate. By utilizing the movement of the piston and under the action of the lifting block, the hook claw and the slide rod are driven to slide in the No. 2 guide groove, thereby driving the flexible circuit board to leave the horizontal projection surface of the light guide plate on the back plate, avoiding squeezing of the flexible circuit board when the light guide plate is installed, and ensuring that the physical integrity and electrical performance of the flexible circuit board are not damaged.

[0013] Furthermore, when the first cylinder installs the light guide plate in the back plate, the suction cup detaches from the light guide plate, and the first cylinder moves upward and leaves the back plate. At this time, the high-pressure airflow stops entering the sliding hole, and the elastic potential energy of the No. 2 spring squeezed by the piston is released, pushing the piston and driving the lifting block to slide at the same time. At this time, the hook claw moves from the high point of the inclined surface to the low point, and under the guidance of the No. 2 guide groove and the action of gravity, the hook claw returns to the original set position. When it reaches the lowest point, the contact part is located below the lower end surface of the flexible circuit board.

[0014] Preferably, a blowing hole is provided on the side of the second cylinder, and a blowing pipe is symmetrically installed on the second cylinder, and the blowing pipe is connected to the second cylinder, and the blowing pipe is connected to the sliding hole through the blowing hole, and a blowing nozzle is provided on one end of the blowing pipe, and the blowing nozzle points to the lower end surface of the flexible circuit board, and the blowing hole is located on the side of the piston away from the blowing hole.

[0015] Since the circuit board is flexible, it will bend downward under the action of gravity. The flexible circuit board at the far point fits with the back plate. During the claw clamping process, the contact part will come into contact and squeeze with part of the side wall of the flexible circuit board, which will cause the flexible circuit board to deform, resulting in circuit damage, short circuit and signal transmission failure. Therefore, a blowing pipe is symmetrically arranged on the side wall of the second cylinder. A blowing nozzle is arranged on the blowing pipe. The air pipe is connected with the sliding hole through the blowing hole. The blowing hole is located on the side of the piston away from the blowing hole. When the high-pressure airflow enters the sliding hole through the air inlet, the piston is pushed to move. During the process, the gas in the sliding hole where the blowing hole is located is compressed, and the gas is blown out from the blowing hole through the blowing pipe and the blowing nozzle. The blown gas acts on the lower end surface of the flexible circuit board, and the piston is driven to move by high-pressure airflow, squeezing the air in the sliding hole to make it blown out from the blowing nozzle. The blown gas pushes the flexible circuit board upward, so that the flexible circuit board is away from the back plate, thereby avoiding the contact part from contacting and squeezing part of the side wall of the flexible circuit board during the claw clamping process, causing circuit damage, causing short circuit and signal transmission failure, and ensuring that the flexible circuit board is not damaged.

[0016] Preferably, a ventilation groove is provided in the contact part, an air suction nozzle is provided on the upper end surface of the contact part, the air suction nozzle is connected to the ventilation groove, an exhaust hole is provided on the side of the second cylinder, and a T-shaped air pipe is connected to the side wall of the second cylinder, the T-shaped air pipe includes an air intake part, an exhaust part and an air intake part, the air intake part, the exhaust part and the air intake part are connected, the air intake part and the exhaust part are in the same straight line, the air intake part is connected to the sliding hole through the exhaust hole, the air suction part is connected to the ventilation groove through a hose, and the distance between the blowing hole and the exhaust hole is shorter than the axial length of the piston.

[0017] When the hook claw lifts the flexible circuit board, vibration will occur, causing the flexible circuit board to break away from the contact part and fall into the back plate again, so that the light guide plate is squeezed when installed on the back plate, thereby causing the circuit board to be deformed and the circuit to be damaged. Therefore, an air suction nozzle is provided on the contact part, and the air suction nozzle is connected to the air suction part on the T-shaped air pipe through a ventilation groove and a hose, and the air intake part is connected to the sliding hole. When the high-pressure airflow enters the sliding hole, it pushes the piston to slide. When the piston approaches the end face of one side of the air intake hole and reaches the exhaust hole, the distance between the blowing hole and the exhaust hole is shorter than the axial length of the piston, and the blowing nozzle stops blowing. At the same time, the high-pressure airflow is discharged from the exhaust hole. The air inlet hole flows to the air inlet part. Since the air inlet part and the air exhaust part are in the same straight line, the high-pressure air flow quickly passes through the air inlet part to the air exhaust part. At this time, due to the Bernoulli principle, the gas in the air intake part flows to the air exhaust part, and is connected to the air intake nozzle through the hose and the ventilation groove. At this time, the air intake nozzle is in the air intake state. When the contact part comes to the lower end surface of the flexible circuit board, the air intake nozzle adsorbs the flexible circuit board. Through the setting of the T-shaped air pipe, the high-pressure air flow in the sliding hole is converted into the adsorption of the flexible circuit board by the air intake nozzle, and then the flexible circuit board is fixed, thereby avoiding vibration that causes the flexible circuit board to separate from the contact part, and ensuring that the flexible circuit board is not damaged.

[0018] Preferably, the air suction nozzle includes a fitting portion and a bending portion, the bending portion is connected to the upper end surface of the contact portion, a plurality of crease grooves are provided on the bending portion, the crease grooves are evenly distributed on the inner wall and side wall of the air nozzle, and are arranged in a staggered manner, the fitting portion is trumpet-shaped, the small diameter end of the fitting portion is connected to the bending portion, and the air suction nozzle is made of elastic material.

[0019] When the flexible circuit board is lifted, it bends, and the shape of the suction nozzle cannot adapt to the curved shape of the circuit board, resulting in a gap, which in turn causes the flexible circuit board to separate from the suction nozzle. After separation, the suction nozzle will not be able to absorb and fix the flexible circuit board, and during the lifting process of the hook claw, the flexible circuit board will be disengaged from the contact part, and the flexible circuit board will fall into the back panel again, causing the light guide plate to squeeze the flexible circuit board when it is installed on the back panel, thereby causing the circuit board to deform and the circuit to be damaged. Therefore, the air nozzle is made of rubber, which has high elasticity, good flexibility and compressibility, and can conform to the curved shape of the circuit board through deformation. At the same time, the design of the horn of the fitting part can increase the suction nozzle's grip on the flexible circuit board, thereby avoiding the appearance of a gap that causes the flexible circuit board to separate from the suction nozzle, which in turn causes the flexible circuit board to be squeezed and deformed by the light guide plate, causing damage to the flexible circuit board.

[0020] Furthermore, a plurality of crease grooves are alternately provided on the inner wall and side wall of the bending portion of the air nozzle. When the flexible circuit board is bent, displacement will occur. The design of the crease grooves increases the deformability of the suction nozzle, enabling the fitting portion to follow the movement of the flexible circuit board. At the same time, the crease grooves can also disperse the bending stress of the flexible circuit board, thereby avoiding damage to the flexible circuit board caused by stress concentration at a certain point, and ensuring that the flexible circuit board is not damaged.

[0021] Preferably, a plurality of mounting grooves are coaxially provided on the sliding hole, and the mounting grooves are respectively arranged on both sides of the No. 1 sliding groove. A limiting ring is provided in the mounting groove, and the limiting ring is trumpet-shaped. The large diameter end of the limiting ring is larger than the diameter of the sliding hole, and the small diameter end of the limiting ring is smaller than the diameter of the sliding hole. The large diameter end of the limiting ring is located in the mounting groove, and the large diameter end of the limiting ring is close to the air inlet side. A plurality of matching grooves are provided on the outer walls at both ends of the piston, and the cross-section of the matching groove is arc-shaped. The limiting ring is made of elastic material, and the limiting ring fits with the matching groove.

[0022] When the high-pressure airflow stops entering the slide hole, the elastic potential energy of the No. 1 spring is quickly released, pushing the No. 1 belt block on the piston to slide quickly in the No. 1 slide groove and the No. 1 guide groove, pushing the push block to quickly separate the push rod and drive the hook claw. The rapid separation between the hook claws will pull the flexible circuit board, causing the problem of tearing the flexible circuit board. Therefore, a trumpet-shaped limit ring is installed in the installation groove opened in the slide hole. The large diameter end of the limit ring is larger than the diameter of the slide hole, and the small diameter end of the limit ring is smaller than the diameter of the slide hole. The large diameter end of the limit ring is located in the installation groove, and the large diameter end of the limit ring is close to the air inlet On one side, multiple matching grooves are arranged on the outer walls at both ends of the piston. When high-pressure airflow is injected into the sliding hole, since the limiting ring is made of rubber, it has high elasticity, good flexibility and compressibility. Through the deformation of the limiting block and the inclination of the inner wall of the limiting block, when the piston contacts the small-diameter end of the limiting ring, it is squeezed to embed it into the installation groove, so as to prevent the limiting ring from hindering the movement of the piston. At the same time, the fitting of the limiting block and the outer wall of the piston prevents the high-pressure gas in the sliding hole from being discharged from the No. 1 sliding groove through the gap between the sliding hole and the piston, thereby ensuring the air tightness of the second cylinder.

[0023] When the high-pressure airflow is stopped, the elastic potential energy of spring No. 1 is released. As the piston moves, when the matching groove on the piston reaches the position of the limit ring, the elastic potential energy of the limit ring is released, and the small diameter of the limit ring is embedded in the matching groove, thereby slowing down the movement speed of the piston. At the same time, the limit ring is made of rubber and will not hinder the movement of the piston. Through the elastic setting of the limit ring and the cooperation with the matching groove, the impact force of the piston is slowed down, avoiding the problem of rapid separation between the hooks pulling the flexible circuit board and causing the flexible circuit board to tear, thereby ensuring that the flexible circuit board is not damaged.

[0024] A backlight flexible circuit board for attaching a light guide plate to the light guide plate using the above-mentioned light guide plate attaching equipment, wherein a plurality of extrusion grooves are horizontally arranged in the flexible circuit board, wherein the extrusion grooves are evenly distributed on the upper and lower sides of the circuit board, wherein the cross-section of the extrusion grooves is triangular, wherein the side edges of the extrusion grooves are parallel to the flexible circuit board, and the extrusion grooves are covered with a protective layer, wherein the protective layer is made of an elastic and smooth material.

[0025] When the flexible circuit board is lifted by the hook, the flexible circuit board will bend, and stress will appear at the bend. The stress will cause the substrate to be delaminated or torn. At the same time, the bonding force between the layers inside the substrate will be destroyed, resulting in delamination, making the circuit board unusable. Therefore, multiple extrusion grooves are provided on the flexible circuit board substrate. When the flexible circuit board is bent, the extrusion groove design is used to reduce the accumulation amount on the inner side of the bend, thereby reducing the generation of stress and avoiding stress at the bend. Stress will cause the substrate to be delaminated or torn, resulting in delamination, making the circuit board unusable, thereby ensuring that the flexible circuit board is not damaged.

[0026] At the same time, the extrusion groove is covered with a protective layer, which is made of polyurethane elastomer, which has good elasticity and the surface smoothness can be adjusted through the process. The elastic design of the protective layer can avoid extrusion of the flexible circuit board. At the same time, the smooth surface treatment can fit well with the suction nozzle to avoid gaps, which will cause the flexible circuit board to separate from the suction nozzle, making it impossible to absorb and fix the flexible circuit board. As a result, the flexible circuit board will fall into the back panel again during the lifting process of the hook, and the flexible circuit board will be squeezed when the light guide plate is subsequently installed on the back panel, causing deformation of the circuit board and damage to the circuit.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention cooperates with the hook claw, the clamping assembly and the lifting member. The clamping assembly converts the pressure of the high-pressure airflow into a driving hook claw to connect with the lower end surface of the flexible circuit board. At the same time, the lifting assembly drives the hook claw to lift and drive the flexible circuit board away from the horizontal projection surface of the light guide plate on the back plate, thereby avoiding squeezing the flexible circuit board when the light guide plate is installed, ensuring that the physical integrity and electrical performance of the flexible circuit board are not damaged.

[0029] 2. The present invention cooperates with the piston, the second cylinder and the air pipe, and utilizes high-pressure airflow to push the piston to move, squeeze the air in the sliding hole and blow it out from the blowing nozzle. The blown gas pushes the flexible circuit board upward, so that the flexible circuit board is away from the back plate, thereby avoiding the contact part of the hook claw clamping process and the side wall of the flexible circuit board. The contact part will be squeezed and the circuit will be damaged, causing short circuits and signal transmission failures, thereby ensuring that the flexible circuit board is not damaged.

[0030] 3. The present invention converts the high-pressure airflow in the sliding hole into adsorption of the flexible circuit board by the suction nozzle through the cooperation of the piston, the second cylinder, the protective layer and the suction nozzle, and further fixes the flexible circuit board through the setting of the T-shaped air pipe. At the same time, the elastic design of the protective layer can avoid squeezing the flexible circuit board, and the smooth surface treatment can fit well with the suction nozzle to avoid gaps, which will cause the flexible circuit board to separate from the suction nozzle and make it impossible to absorb and fix the flexible circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the backlight flexible circuit board and the light guide plate attachment device of the present invention;

[0032] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A;

[0033] Figure 3 It is a schematic diagram of the structure of the hook in the present invention;

[0034] Figure 4 For the present invention Figure 3 A local enlarged view of point B in FIG.

[0035] Figure 5 It is a schematic diagram of the assembly of the second cylinder and the piston in the present invention;

[0036] Figure 6 For the present invention Figure 5 A partial enlarged view of point C in the middle;

[0037] Figure 7 It is a structural schematic diagram of the push block in the present invention;

[0038] Figure 8 This is an axial cross-sectional view of the flexible circuit board and the backplane in the present invention:

[0039] Fig. 9 It is an axial cross-sectional view of the T-shaped trachea in the present invention.

[0040] In the figure: 1, conveyor belt; 11, frame; 111, gripping groove; 112, guide groove No. 2; 113, lifting section; 114, evacuation section; 2, back plate; 3, flexible circuit board; 31, extrusion groove; 32, protective layer; 4, first cylinder; 41, suction cup; 42, light guide plate; 5, hook; 51, contact part; 511, ventilation groove; 512, suction nozzle; 513, fitting part; 514, bending part; 515, crease groove; 52, support part; 53, connecting rod No. 1; 54, push rod; 541, matching surface; 55, slide rod; 56, No. 2 No. 1 spring; 6, second cylinder; 61, sliding hole; 611, mounting groove; 612, limiting ring; 62, air inlet hole; 63, piston; 631, matching groove; 64, No. 1 spring; 65, No. 1 sliding groove; 651, No. 1 guide block; 66, push block; 661, No. 1 guide groove; 662, guide surface; 67, lifting block; 671, inclined surface; 68, blowing hole; 681, blowing pipe; 682, blowing nozzle; 69, exhaust hole; 691, T-shaped air pipe; 692, air inlet part; 693, exhaust part; 694, air suction part; 695, hose. DETAILED DESCRIPTION

[0041] See also Figures 1 to 9 The present invention provides a backlight flexible circuit board and light guide plate attachment device, and the technical solution is as follows:

[0042] A light guide plate attaching device includes a frame 11, a first cylinder 4, a suction cup 41, a first connecting rod 53 and a hook 5. A conveyor belt 1 is horizontally installed on the frame 11. The upper side of the conveyor belt 1 is used to place a back plate 2. The back plate 2 is used to place a flexible circuit board 3. The first cylinder 4 is horizontally slidably installed on the frame 11. A suction cup 41 is connected below the first cylinder 4. The suction cup 41 is used to adsorb the light guide plate 42.

[0043] Specifically, a gripping assembly and a lifting assembly are installed on the frame 11, and hook claws 5 are symmetrically arranged on the frame 11. The hook claws 5 are connected to the frame 11 through a No. 1 connecting rod 53. The hook claws 5 include a contact portion 51 and a support portion 52. The support portion 52 is slidably connected to the frame 11, and the support portion 52 is respectively connected to the lifting assembly and the adding and taking assembly. The contact portion 51 is used to connect with the flexible circuit board 3, and the gripping assembly is used to drive the hook claw 5 to move the contact portion 51 to the bottom of the flexible circuit board. The lifting assembly is used to drive the hook claw 5 to lift when the contact portion 51 moves to the bottom of the flexible circuit board. A ventilation groove 511 is provided in the contact portion 51, and an air suction nozzle 512 is provided on the upper end surface of the contact portion 51, and the air suction nozzle 512 is connected to the ventilation groove 511. An exhaust hole 69 is provided on the side of the second cylinder 6, and a T-shaped air pipe 691 is connected to the side wall of the second cylinder 6. The tube 691 includes an air inlet portion 692, an air exhaust portion 693 and an air suction portion 694. The air inlet portion 692, the air exhaust portion 693 and the air suction portion 694 are connected. The air inlet portion 692 and the air exhaust portion 693 are in the same straight line. The air inlet portion 692 is connected to the sliding hole 61 through the exhaust hole 69. The air suction portion 694 is connected to the ventilation groove 511 through the hose 695. The distance between the blowing hole 68 and the exhaust hole 69 is shorter than the axial length of the piston 63. The air suction nozzle 512 includes a fitting portion 513 and a bending portion 514. The bending portion 514 is connected to the upper end surface of the contact portion 51. A plurality of crease grooves 515 are provided on the bending portion 514. The crease grooves 515 are evenly distributed on the inner wall and the side wall of the air nozzle and are arranged in a staggered manner. The fitting portion 513 is trumpet-shaped. The small-diameter end of the fitting portion 513 is connected to the bending portion 514. The air suction nozzle 512 is made of elastic material.

[0044] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 7, the clamping assembly includes a second cylinder 6, a piston 63, a first guide block 651, a push block 66, a push rod 54, a first spring 64, a slide bar 55 and a second spring 56. The second cylinder 6 is horizontally installed on the frame 11. A sliding hole 61 is provided in the second cylinder 6. An air inlet 62 is provided at one end of the sliding hole 61. A piston 63 is slidably installed in the sliding hole 61. The second cylinder 6 is connected to one end of the piston 63 through the first spring 64. A first slide groove 65 is provided on the upper end surface of the second cylinder 6 parallel to the axis of the sliding hole 61. The first slide groove 65 is connected to the sliding hole 61. A first guide block 651 is provided on the side wall of the piston 63. A push block 66 is slidably installed on the upper end surface of the second cylinder 6. The sliding direction of the push block 66 is perpendicular to the axis of the second cylinder 6. A first guide groove 661 is provided on the push block 66. The first guide groove 661 is inclined. The first guide block 651 is respectively connected to the first slide groove 65 and the first guide groove 65. The hook 5 is slidably connected to the groove 661, and guide surfaces 662 are provided on both sides of the push block 66. A push rod 54 is provided on the inner side of the hook 5, and a mating surface 541 is provided at one end of the push rod 54. The guide surface 662 and the mating surface 541 are slidably connected. The slide bar 55 is slidably installed on the frame 11 and is slidably connected with the hook 5. The hooks 5 are connected by a No. 2 spring 56. A clamping groove 111 is provided at the connection between the hook 5 and the frame 11. The hook 5 is slidably installed in the clamping groove 111. A blowing hole 68 is provided on the side of the second cylinder 6. A blowing pipe 681 is symmetrically installed on the second cylinder 6, and the blowing pipe 681 is connected to the second cylinder 6. The blowing pipe 681 is connected to the sliding hole 61 through the blowing hole 68. A blowing nozzle 682 is provided on one end of the blowing pipe 681. The blowing nozzle 682 points to the lower end surface of the flexible circuit board 3, and the blowing hole 68 is located on the side of the piston 63 away from the blowing hole 68.

[0045] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 , Fig. 9The lifting assembly includes a lifting block 67, one side of which is connected to the axis of the piston 63, an inclined surface 671 is provided on the upper end of the lifting block 67, and the side of the inclined surface 671 close to the piston 63 is a high point, and the inclined surface 671 is slidably connected to the lower end surface of the supporting portion 52 of the hook 5, and a No. 2 guide groove 112 is provided at the connection between the hook 5 and the frame 11, and the No. 1 connecting rod 53 and the sliding rod 55 are slidably installed in the No. 2 guide groove 112, and the No. 2 guide groove 112 includes a lifting section 113 and a withdrawal section 114, and the lifting section 113 is connected to the withdrawal section 114, and the lifting section 113 is arranged vertically, and the length of the lifting section 113 is higher than the height of the back plate 2, and the withdrawal section 114 is inclined, and the inclination direction is away from the side of the back plate 2 The projection of the No. 2 guide groove 112 is located within the vertical plane projection of the clamping groove 111. A plurality of mounting grooves 611 are coaxially arranged on the slide hole 61. The mounting grooves 611 are respectively arranged on both sides of the No. 1 slide groove 65. A limiting ring 612 is arranged in the mounting groove 611. The limiting ring 612 is trumpet-shaped. The large diameter end of the limiting ring 612 is larger than the diameter of the slide hole 61, and the small diameter end of the limiting ring 612 is smaller than the diameter of the slide hole 61. The large diameter end of the limiting ring 612 is located in the mounting groove 611, and the large diameter end of the limiting ring 612 is close to the air inlet side. A plurality of matching grooves 631 are arranged on the outer walls at both ends of the piston 63. The cross section of the matching groove 631 is arc-shaped. The limiting ring 612 is made of elastic material, and the limiting ring 612 fits with the matching groove 631.

[0046] See also Figures 1 to 9 A backlight flexible circuit board for attaching a light guide plate to the light guide plate using the above-mentioned light guide plate attaching device, wherein a plurality of extrusion grooves 31 are horizontally arranged in the flexible circuit board 3, and the extrusion grooves 31 are evenly distributed on the upper and lower sides of the circuit board, and the cross-section of the extrusion grooves 31 is triangular, wherein the side of the extrusion grooves 31 is parallel to the flexible circuit board 3, and the extrusion grooves 31 are covered with a protective layer 32, and the protective layer 32 is made of an elastic and smooth material.

[0047] Working principle: When the light guide plate 42 is to be installed in the back plate 2, the bottom is first placed on the conveyor belt 1. Under the action of the conveyor belt 1, the back plate 2 moves forward with the conveyor belt 1. When the conveyor belt 1 reaches the set position, the conveyor belt 1 stops. At this time, the suction cup 41 sucks up the external light guide plate 42, and then controls the first cylinder 4 to move to the top of the back plate 2. The light guide plate 42 is placed in the back plate 2 by extending the first cylinder 4. The control switch is triggered during the descent of the light guide plate 42. At this time, the high-pressure airflow is controlled to enter the slide hole 61 through the air inlet hole 62. At this time, the high-pressure airflow acts on the piston 63, and the piston 63 moves. At this time, the gas in the slide hole 61 at the position of the blowing hole 68 is compressed, and the gas is blown out from the blowing hole 68 through the blowing pipe 681 and the blowing nozzle 682 The blown gas acts on the lower end surface of the flexible circuit board 3, and the blown gas pushes the flexible circuit board 3 upward to make the flexible circuit board 3 away from the back plate 2. At the same time, the movement of the piston 63 drives the No. 1 guide block 651 to slide in the No. 1 slide groove 65 and the No. 1 guide groove 661. Since the push block 66 is slidably installed on the piston 63, and the No. 1 guide groove 661 is inclined, at this time, under the action of the No. 1 guide groove 661, the push block 66 slides in the direction perpendicular to the axis of the slide hole 61. At the same time, under the contraction of the No. 2 spring 56, the hook 5 slides in the clamping groove 111, and at the same time, the push rod 54 on the hook 5 gradually approaches, and the contact area between the guide surface 662 on the push block 66 and the matching surface 541 on the push rod 54 gradually decreases until the push rod 54 The end faces are in contact, and the guide surface 662 and the matching surface 541 are separated. At this time, the contact portion 51 moves to the lower end surface of the flexible circuit board 3 and fits with it. At the same time, when the piston 63 approaches the end face of one side of the air inlet 62 and comes to the exhaust hole 69, the distance between the blowing hole 68 and the exhaust hole 69 is shorter than the axial length of the piston 63, and the blowing nozzle 682 stops blowing. At the same time, the high-pressure airflow flows from the exhaust hole 69 to the air inlet portion 692. Since the air inlet portion 692 and the exhaust portion 693 are in the same straight line, the high-pressure airflow quickly passes through the air inlet portion 692 to the exhaust portion 693. The design of the T-shaped air pipe 691 is due to the Bernoulli principle. At this time, the gas in the suction portion 694 flows to the exhaust portion 693, and passes through the hose 695 and the ventilation groove 511 and the suction nozzle 512. When the contact portion 51 comes to the lower end surface of the flexible circuit board 3, the fitting portion 513 on the suction nozzle 512 is adsorbed on the protective layer 32 on the lower end surface of the flexible circuit board 3, thereby fixing the flexible circuit board 3, thereby preventing the flexible circuit board 3 from being separated from the contact portion 51 by vibration. At the same time, the crease groove 515 of the bending portion 514 is designed to increase the deformability of the suction nozzle 512, so that the fitting portion 513 can follow the movement of the flexible circuit board 3. At the same time, the crease groove 515 can also disperse the bending stress of the flexible circuit board 3, and push the lifting block 67 connected to it to move during the forward movement of the piston 63. At this time, the lower end surface of the supporting portion 52 of the hook claw 5 contacts the low point of the inclined surface 671 on the lifting block 67.As the lifting block 67 moves and the inclined surface 671 acts, the horizontal movement of the lifting block is converted into the upward movement of the hook 5. At this time, the hook 5 is lifted under the guidance of the lifting section 113 on the second guide groove 112. As the lifting block 67 continues to move, it comes to the evacuation section 114. Under the guidance of the hook 5, it leaves the horizontal projection surface of the light guide plate 42 on the back plate 2, thereby avoiding squeezing the flexible circuit board 3 when the light guide plate 42 is installed, ensuring that the physical integrity and electrical performance of the flexible circuit board 3 are not damaged.

[0048] When the light guide plate 42 cooperates with the back plate 2, the first cylinder 4 drives the suction cup 41 to rise. When the suction cup 41 reaches the high point, the high-pressure airflow stops entering the slide hole 61. At this time, the elastic potential energy of the No. 2 spring 56 squeezed by the piston 63 is released, pushing the piston 63 to discharge the high-pressure airflow in the slide hole 61 from the air inlet. At this time, the claw 5 moves from the high point of the inclined surface 671 to the low point. Under the guidance of the No. 2 guide groove 112 and the action of gravity, the claw 5 returns to the original set position. When it reaches the lowest point, the exhaust hole 69 is blocked by the side wall of the piston 63, the suction nozzle 512 stops sucking air, and the No. 1 guide block 651 slides in the No. 1 slide groove 65 and the No. 1 guide groove 661. At this time, the guide surface 662 is reconnected with the matching surface 541. Under the push of the No. 1 spring 64, the push rod 54 is separated, and the No. 2 spring 56 is stretched. As the piston 63 moves, when the matching groove 631 on the piston 63 comes to the position of the limit ring 612, the elastic potential energy of the limit ring 612 is released, and the limit ring 612 is embedded in the matching groove 631 to reduce the movement speed of the piston 63. At the same time, the contact part 51 is separated from the flexible circuit board 3, and the hook 5 leaves the light guide plate 42 on the horizontal projection plane to prepare for the installation of the next group of light guide plates 42.

[0049] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A light guide plate attaching device, comprising a frame (11), a first cylinder (4), a suction cup (41), a first connecting rod (53) and a hook (5), wherein a conveyor belt (1) is horizontally mounted on the frame (11), the upper side of the conveyor belt (1) is used to place a back plate (2), and the back plate (2) is used to place a flexible circuit board (3), a first cylinder (4) is horizontally slidably mounted on the frame (11), a suction cup (41) is connected below the first cylinder (4), and the suction cup (41) is used to adsorb the light guide plate (42), characterized in that: The frame (11) is provided with a gripping assembly and a lifting assembly. The frame (11) is symmetrically provided with hook claws (5). The hook claws (5) are connected to the frame (11) via a No. 1 connecting rod (53). The hook claws (5) include a contact portion (51) and a support portion (52). The support portion (52) is slidably connected to the frame (11). The support portion (52) is respectively connected to the lifting assembly and the adding and taking assembly. The contact portion (51) is used to be connected to the flexible circuit board (3). The gripping assembly is used to drive the hook claw (5) to move the contact portion (51) below the flexible circuit board. The lifting assembly is used to drive the hook claw (5) to lift when the contact portion (51) moves below the flexible circuit board (3).

2. The light guide plate attaching device according to claim 1, characterized in that: The clamping assembly comprises a second cylinder (6), a piston (63), a guide block (651), a push block (66), a push rod (54), a spring (64), a slide bar (55) and a spring (56). The second cylinder (6) is horizontally mounted on the frame (11). A slide hole (61) is provided in the second cylinder (6). An air inlet hole (62) is provided at one end of the slide hole (61). A piston (63) is slidably mounted in the slide hole (61). The second cylinder (6) is connected to one end of the piston (63) via the spring (64). A slide groove (65) is provided on the upper end surface of the second cylinder (6) parallel to the axis of the slide hole (61). The slide groove (65) is connected to the slide hole (61). A guide block (651) is provided on the side wall of the piston (63). A push block (66) is slidably mounted on the upper end surface of the second cylinder (6). The sliding direction of the push block (66) is perpendicular to the axis of the second cylinder (6). The push block (66) is provided with a No. 1 guide groove (661), and the No. 1 guide groove (661) is inclined. The No. 1 guide block (651) is slidably connected with the No. 1 slide groove (65) and the No. 1 guide groove (661) respectively. Guide surfaces (662) are provided on both sides of the push block (66). A push rod (54) is provided on the inner side of the hook claw (5). A matching surface (541) is provided at one end of the push rod (54). The guide surface (662) and the matching surface (541) are slidably connected. The slide rod (55) is slidably installed on the frame (11) and is slidably connected with the hook claw (5). The hook claws (5) are connected by a No. 2 spring (56). A clamping groove (111) is provided at the connection between the hook claw (5) and the frame (11), and the hook claw (5) is slidably installed in the clamping groove (111).

3. The light guide plate attaching device according to claim 2, characterized in that: The lifting assembly comprises a lifting block (67), one side of the lifting block (67) is connected to the axis of the piston (63), an upper end of the lifting block (67) is provided with an inclined surface (671), the inclined surface (671) is close to the piston (63) and is a high point, the inclined surface (671) is slidably connected to the lower end surface of the support portion (52) of the hook claw (5), a second guide groove (112) is provided at the connection between the hook claw (5) and the frame (11), the first connecting rod (53) and the sliding rod (55) are slidably arranged Installed in the No. 2 guide groove (112), the No. 2 guide groove (112) comprises a lifting section (113) and a withdrawal section (114), the lifting section (113) is connected to the withdrawal section (114), the lifting section (113) is vertically arranged, the length of the lifting section (113) is higher than the height of the back plate (2), the withdrawal section (114) is inclined, and the inclination direction is away from the back plate (2), and the projection of the No. 2 guide groove (112) is located within the vertical plane projection of the clamping groove (111).

4. The light guide plate attaching device according to claim 3, characterized in that: A blowing hole (68) is provided on the side of the second cylinder (6), and a blowing pipe (681) is symmetrically installed on the second cylinder (6), and the blowing pipe (681) and the second cylinder (6) are connected to each other, and the blowing pipe (681) is connected to the sliding hole (61) through the blowing hole (68), and a blowing nozzle (682) is provided on one end of the blowing pipe (681), and the blowing nozzle (682) points to the lower end surface of the flexible circuit board (3), and the blowing hole (68) is located on the side of the piston (63) away from the blowing hole (68).

5. The light guide plate attaching device according to claim 4, characterized in that: A ventilation groove (511) is provided in the contact portion (51), an air suction nozzle (512) is provided on the upper end surface of the contact portion (51), and the air suction nozzle (512) is communicated with the ventilation groove (511); an exhaust hole (69) is provided on the side of the second cylinder (6); a T-shaped air pipe (691) is connected to the side wall of the second cylinder (6), and the T-shaped air pipe (691) includes an air inlet portion (692), an exhaust portion (693) and an air suction portion (694). ), the air inlet portion (692), the air exhaust portion (693) and the air suction portion (694) are connected, the air inlet portion (692) and the air exhaust portion (693) are in the same straight line, the air inlet portion (692) is connected to the sliding hole (61) through the exhaust hole (69), the air suction portion (694) is connected to the ventilation groove (511) through the hose (695), and the distance between the blowing hole (68) and the exhaust hole (69) is shorter than the axial length of the piston (63).

6. The light guide plate attaching device according to claim 5, characterized in that: The air suction nozzle (512) comprises a fitting portion (513) and a bending portion (514); the bending portion (514) is connected to the upper end surface of the contact portion (51); a plurality of crease grooves (515) are provided on the bending portion (514); the crease grooves (515) are evenly distributed on the inner wall and the side wall of the air nozzle and are arranged in a staggered manner; the fitting portion (513) is trumpet-shaped; the small-diameter end of the fitting portion (513) is connected to the bending portion (514); and the air suction nozzle (512) is made of an elastic material.

7. The light guide plate attaching device according to claim 4, characterized in that: A plurality of mounting grooves (611) are coaxially arranged on the sliding hole (61), and the mounting grooves (611) are respectively arranged on both sides of the No. 1 sliding groove (65). A limiting ring (612) is arranged in the mounting groove (611), and the limiting ring (612) is trumpet-shaped. The large diameter end of the limiting ring (612) is larger than the diameter of the sliding hole (61), and the small diameter end of the limiting ring (612) is smaller than the diameter of the sliding hole (61). The large diameter end of the limiting ring (612) is located in the mounting groove (611), and the large diameter end of the limiting ring (612) is close to the air inlet. A plurality of matching grooves (631) are arranged on the outer walls at both ends of the piston (63), and the cross-section of the matching grooves (631) is in the shape of an arc. The limiting ring (612) is made of elastic material, and the limiting ring (612) fits the matching groove (631).

8. A backlight flexible circuit board for attaching a light guide plate to a light guide plate by the light guide plate attaching device according to any one of claims 1 to 7, characterized in that: A plurality of extrusion grooves (31) are horizontally arranged in the flexible circuit board (3), the extrusion grooves (31) are evenly distributed on the upper and lower sides of the circuit board, the cross-section of the extrusion grooves (31) is triangular, the side of the extrusion grooves (31) is parallel to the flexible circuit board (3), and the extrusion grooves (31) are covered with a protective layer (32), and the protective layer (32) is made of an elastic and smooth material.

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