Ultrasonic welding device for optical materials of LED backlight module of liquid crystal display screen

Abstract

The utility model belongs to the technical field of liquid crystal display screen manufacturing equipment, and particularly relates to an ultrasonic welding device for optical materials of an LED (light-emitting diode) backlight module of a liquid crystal display screen. The component cost of each station is reduced; through an ultrasonic welding and pasting mode, UV glue is saved, and the cost of raw materials is reduced; when the optical material of the LED backlight module of the liquid crystal display screen is placed on the welding platform, the optical material is positioned by leaning against the side, and the product is positioned by leaning against the side, so that the positioning is faster and more convenient; the length, the diameter and the distance of the welding and pasting PINs of the ultrasonic welding gun can be determined according to the welding process requirement, the length of the pressing block where the PINs are located is selected according to the ultrasonic power, and the defect of poor uniformity of welding and pasting does not exist; multi-layer welding can be achieved in a welding and pasting mode, the production efficiency is improved, and the equipment cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid crystal display manufacturing equipment, and particularly relates to an ultrasonic welding device for optical materials of an LED backlight module of a liquid crystal display. Background Art

[0002] The optical materials of the LED backlight module of the liquid crystal display generally include a reflective sheet, a quantum dot film, a diffusion sheet, a brightness enhancement film, a DBEF, a composite film, etc. When manufacturing the LED backlight module of the liquid crystal display, it is necessary to paste these materials of different layers. The traditional pasting process is to use a specific spraying glue device to spray a specific UV glue on the surface of the product, and then use a specific UV curing lamp for curing. The method of pasting through UV glue has the following disadvantages: First, it has high requirements for the flatness of the tabletop, especially for large-size products, and the equipment manufacturing cost is high; second, it has high requirements for the position of the glue line, and the glue is easy to touch the working area of the product, resulting in defective products; third, it has high requirements for the uniformity of the glue line, and uneven glue is easy to cause the product to crack, resulting in defective products; fourth, when pasting multiple layers of products, it is necessary to spray glue and cure between every two pieces, which affects the production efficiency and increases the equipment cost. Summary of the Utility Model

[0003] The utility model aims to provide an ultrasonic welding device for optical materials of an LED backlight module of a liquid crystal display, so as to realize the low-cost, high-quality and high-efficiency welding of the optical materials of the LED backlight module of the liquid crystal display through the ultrasonic welding device for optical materials of the LED backlight module of the liquid crystal display.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] Provide an ultrasonic welding device for optical materials of an LED backlight module of a liquid crystal display, including a support frame and an ultrasonic welding gun. On the support frame, there is a welding platform for placing the optical materials of the LED backlight module of the liquid crystal display, and a moving frame for driving the ultrasonic welding gun to change the welding position. The moving frame includes a transverse moving mechanism arranged on the support frame. On the transverse moving mechanism, there is a longitudinal moving mechanism, and on the longitudinal moving mechanism, there is a vertical moving mechanism. The ultrasonic welding gun is arranged on the vertical moving mechanism.

[0006] Preferably, the transverse moving mechanism includes two transverse guide rails arranged in parallel on the support frame. On the transverse guide rails, there are transverse sliders. On the support frame, there is a transverse driving motor. The rotating shaft of the transverse driving motor is connected with a transverse gearbox. Both sides of the transverse gearbox are respectively connected with transverse driving shafts. The transverse driving shafts are respectively connected with the transverse sliders through transverse transmission mechanisms.

[0007] Preferably, the transverse transmission mechanism includes transverse pulley supports arranged at both ends of the transverse guide rail, transverse pulleys arranged in the transverse pulley supports, a transverse transmission belt arranged between the transverse pulleys on both sides, and the transverse slider is connected to the transverse transmission belt.

[0008] Preferably, the longitudinal movement mechanism includes a longitudinal guide rail arranged between the transverse sliders arranged on the two transverse guide rails, a longitudinal slider arranged on the longitudinal guide rail, a longitudinal drive motor arranged on the longitudinal guide rail, and the longitudinal drive motor is connected to the longitudinal slider through a longitudinal transmission mechanism.

[0009] Preferably, the longitudinal transmission mechanism includes longitudinal pulley supports arranged at both ends of the longitudinal guide rail, longitudinal pulleys arranged in the longitudinal pulley supports, a longitudinal transmission belt arranged between the longitudinal pulleys on both sides, and the longitudinal slider is connected to the longitudinal transmission belt.

[0010] Preferably, the vertical movement mechanism includes a vertical guide rail arranged on the longitudinal slider, a vertical slider arranged on the vertical guide rail, a vertical drive motor arranged on the vertical guide rail, and the vertical drive motor is connected to the vertical slider through a vertical transmission mechanism.

[0011] Preferably, the vertical transmission mechanism includes a lead screw arranged in the vertical guide rail, a nut arranged on the lead screw, and the vertical slider is connected to the nut.

[0012] Preferably, a transverse movement sensor is arranged on the transverse slider, and a transverse drag chain for arranging lines is arranged on the support frame; a longitudinal movement sensor is arranged on the longitudinal slider, and a longitudinal drag chain is arranged on the longitudinal guide rail; a vertical movement sensor is arranged on the vertical slider, and a vertical drag chain is arranged on the vertical guide rail;

[0013] There are two ultrasonic welding guns, and the mobile frame is correspondingly provided with two sets. The two sets of mobile frames are arranged symmetrically left and right on the support frame, and the two ultrasonic welding guns are respectively arranged on the two sets of mobile frames.

[0014] Preferably, the ultrasonic welding gun includes a gun head and a gun head mounting plate. The gun head is arranged on the gun head mounting plate. A welding depth limiting plate is arranged on the lower side of the gun head mounting plate. The front end of the gun head passes through the welding depth limiting plate, and the welding depth limiting plate is connected to the lower side of the gun head mounting plate through a guide rod and an adjusting bolt.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: The ultrasonic welding device for the optical material of the LCD display LED backlight module includes a support frame and an ultrasonic welding gun. A welding platform for placing the optical material of the LCD display LED backlight module is provided on the support frame, and a moving frame for driving the ultrasonic welding gun to change the welding position. The moving frame includes a lateral moving mechanism arranged on the support frame, a longitudinal moving mechanism is arranged on the lateral moving mechanism, a vertical moving mechanism is arranged on the longitudinal moving mechanism, and the ultrasonic welding gun is arranged on the vertical moving mechanism. The ultrasonic welding device for the optical material of the LCD display LED backlight module has the following advantages: Compared with the traditional manufacturing process, since the ultrasonic welding method does not require the use of injection valves and UV lamps, the component cost of each station is reduced; and through the ultrasonic welding and pasting method, UV glue is saved, and the raw material cost is reduced; the requirement for the flatness of the equipment is reduced, and the processing technology cost of the workpiece is saved; when the optical material of the LCD display LED backlight module is placed on the welding platform, it is positioned by relying on the edge. By positioning the product by relying on the edge, the positioning is more rapid and convenient; the length, diameter and spacing of the welding and pasting PIN needles of the ultrasonic welding gun can be determined according to the welding process requirements, and the length of the pressing block where the PIN needles are located is selected according to the ultrasonic power. There is no disadvantage of poor uniformity in welding and pasting; through the welding and pasting method, multi-layer welding can be carried out, the production efficiency is improved, and the equipment cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0017] Figure 1 FIG. 9 is one of the three-dimensional structural schematic diagrams of an embodiment of the ultrasonic welding device for the optical material of the LCD display LED backlight module of the present utility model.

[0018] Figure 2 FIG. 13 is the front view of an embodiment of the ultrasonic welding device for the optical material of the LCD display LED backlight module of the present utility model.

[0019] Figure 3 FIG. 17 is the bottom view of an embodiment of the ultrasonic welding device for the optical material of the LCD display LED backlight module of the present utility model.

[0020] Figure 4 FIG. 21 is the second three-dimensional structural schematic diagram of an embodiment of the ultrasonic welding device for the optical material of the LCD display LED backlight module of the present utility model.

[0021] Figure 5 FIG. 25 is the side view of an embodiment of the ultrasonic welding device for the optical material of the LCD display LED backlight module of the present utility model.

[0022] Figure 6 This is the third schematic diagram of the three-dimensional structure of an embodiment of the ultrasonic welding device for the optical materials of the LED backlight module of the liquid crystal display screen of the present utility model.

[0023] Figure 7 This is a schematic installation diagram of the ultrasonic welding gun on the moving frame in an embodiment of the ultrasonic welding device for the optical materials of the LED backlight module of the liquid crystal display screen of the present utility model.

[0024] Figure 8 This is a schematic structural diagram of the ultrasonic welding gun in an embodiment of the ultrasonic welding device for the optical materials of the LED backlight module of the liquid crystal display screen of the present utility model.

[0025] Figure 9 This is a schematic welding path diagram of the ultrasonic welding gun in an embodiment of the ultrasonic welding device for the optical materials of the LED backlight module of the liquid crystal display screen of the present utility model.

[0026] In the figure, the reference numerals denote: support frame 1, ultrasonic welding gun 2, gun head mounting plate 21, welding depth limiting plate 22, height adjustment bolt 23, guide rod 24, optical material 3 of the LED backlight module of the liquid crystal display screen, welding platform 4, lateral moving mechanism 5, lateral guide rail 51, lateral slider 52, lateral driving motor 53, lateral gearbox 54, lateral driving shaft 55, lateral pulley support 56, lateral drag chain 57, longitudinal moving mechanism 6, longitudinal guide rail 61, longitudinal slider 62, longitudinal driving motor 63, longitudinal pulley support 64, longitudinal drag chain 65, vertical moving mechanism 7, vertical guide rail 71, vertical slider 72, vertical driving motor 73, vertical drag chain 74. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] In one embodiment, an ultrasonic welding device for the optical materials of the LED backlight module of the liquid crystal display screen is provided to perform ultrasonic welding on the optical materials of the LED backlight module of the liquid crystal display screen through the ultrasonic welding device for the optical materials of the LED backlight module of the liquid crystal display screen, as Figures 1-5As shown in the figure, the ultrasonic welding device for the optical material of the liquid crystal display LED backlight module includes a support frame 1 and an ultrasonic welding gun 2. The support frame 1 is a square frame structure, mainly playing a supporting role for other components. The ultrasonic welding gun 2 is an ultrasonic welding component controlled by an ultrasonic welder. On the support frame 1, there is a welding platform 4 for placing the optical material 3 of the liquid crystal display LED backlight module. The welding platform 4 is located inside the support frame 1 so that the ultrasonic welding gun 2 can move to the corresponding welding position. On the support frame 1, there is also a moving frame for driving the ultrasonic welding gun 2 to change the welding position. The moving frame is a three-dimensional moving frame that can move to different positions in the space along the front-back, left-right, and up-down directions. The moving frame includes a lateral moving mechanism 5 arranged on the support frame 1. On the lateral moving mechanism 5, there is a longitudinal moving mechanism 6. The lateral moving mechanism 5 can drive the longitudinal moving mechanism 6 to move laterally. On the longitudinal moving mechanism 6, there is a vertical moving mechanism 7. The longitudinal moving mechanism 6 can drive the vertical moving mechanism 7 to move longitudinally. The ultrasonic welding gun 2 is arranged on the vertical moving mechanism 7. The vertical moving mechanism 7 can drive the ultrasonic welding gun 2 to move vertically. Thus, the ultrasonic welding gun can finally move to different positions in the space along the front-back, left-right, and up-down directions.

[0029] The working mode of the ultrasonic welding device for the optical material of the liquid crystal display LED backlight module is as follows: Place the optical material 3 of the liquid crystal display LED backlight module to be welded on the welding platform 4, and then control the moving frame to carry the ultrasonic welding gun 2 to move to different welding positions on the optical material 3 of the liquid crystal display LED backlight module. At each welding position, the moving frame drives the ultrasonic welding gun 2 to move down to contact the optical material 3 of the liquid crystal display LED backlight module, and then perform ultrasonic welding. After the welding is completed, the moving frame drives the ultrasonic welding gun 2 to move up to separate from the optical material 3 of the liquid crystal display LED backlight module, and then move to the next welding position for welding.

[0030] The ultrasonic welding device for the optical material of the liquid crystal display LED backlight module has the following advantages: Compared with the traditional manufacturing process, since the ultrasonic welding method does not require the use of spray valves and UV lamps, the component cost of each station is reduced; and through the ultrasonic welding and pasting method, UV glue is saved, reducing the raw material cost; the requirement for the flatness of the equipment is reduced, saving the processing technology cost of the workpiece; when the optical material 3 of the liquid crystal display LED backlight module is placed on the welding platform 4, it is positioned by relying on the edge. By positioning the product by relying on the edge, the positioning is more rapid and convenient; the length, diameter, and spacing of the welding and pasting PIN needles of the ultrasonic welding gun 2 can be determined according to the welding process requirements, and the length of the pressing block where the PIN needles are located is selected according to the ultrasonic power. There is no disadvantage of poor uniformity in welding and pasting; through the welding and pasting method, multi-layer welding can be performed, improving the production efficiency and reducing the equipment cost.

[0031] Further, in another embodiment, as Figure 6 shown, the lateral movement mechanism 5 of the ultrasonic welding device for the optical material of the liquid crystal display LED backlight module includes two parallel lateral guide rails 51 arranged on the support frame. The two lateral guide rails 51 are respectively arranged on the top cross beam of the support frame 1. A lateral slider 52 is arranged on the lateral guide rail 51. The lateral slider 52 can slide along the lateral guide rail 51. A lateral driving motor 53 is arranged on the support frame 1. The rotating shaft of the lateral driving motor 53 is connected with a lateral gearbox 54. The two sides of the lateral gearbox 54 are respectively connected with a lateral driving shaft 55. The main function of the lateral gearbox 54 is to distribute the power output by the lateral driving motor 53 to the lateral driving shafts 55 on both sides. The lateral driving shafts 55 on both sides are respectively connected with the lateral slider 52 through a lateral transmission mechanism. The lateral driving shaft 55 transmits the power to the lateral slider 52 through the lateral transmission mechanism, driving the lateral slider 52 to move along the lateral guide rail 51.

[0032] In this embodiment, the lateral transmission mechanism includes lateral pulley supports 56 arranged at both ends of the lateral guide rail 51. Lateral pulleys are arranged in the lateral pulley supports 56. A lateral transmission belt is arranged between the lateral pulleys on both sides. The lateral slider 52 is connected with the lateral transmission belt. The lateral guide rail 51 is hollow and has a slit on the upper side. The lateral transmission belt is arranged in the lateral guide rail 51. The bottom of the lateral slider 52 passes through the slit and is connected with the lateral transmission belt. The lateral transmission belt is a toothed belt to prevent slipping. In other embodiments, the lateral transmission mechanism can also adopt transmission mechanisms such as ball screws.

[0033] The lateral movement mechanism 5 of the ultrasonic welding device for the optical material of the liquid crystal display LED backlight module drives the lateral sliders 52 on both sides simultaneously by arranging the lateral driving shafts 55 on both sides and using one lateral driving motor 53, and ensures that the moving speeds of the lateral sliders 52 are consistent. The lateral driving motor 53 is a stepping motor, and its rotation speed can be controlled by a PLC controller, so that the moving distance of the lateral slider 52 can be accurately controlled according to the set parameters.

[0034] Further, in another embodiment, as Figure 7As shown in the figure, the longitudinal movement mechanism 6 of the ultrasonic welding device for the optical material of the LCD display LED backlight module. The longitudinal movement mechanism 6 includes a longitudinal guide rail 61 disposed between the transverse sliders 52 provided on two transverse guide rails 51. When the transverse sliders 52 move on the transverse guide rails 51, they carry the longitudinal guide rail 61 to move in the transverse direction. A longitudinal slider 62 is provided on the longitudinal guide rail 61, and a longitudinal drive motor 63 is provided on the support frame 1. The longitudinal drive motor 63 is connected to the longitudinal slider 62 through a longitudinal transmission mechanism. The longitudinal drive motor 63 is a stepper motor, and the longitudinal drive motor 63 is controlled by a PLC controller. The longitudinal drive motor 63 then drives the longitudinal slider 62 through the longitudinal transmission mechanism, enabling the longitudinal slider 62 to move on the longitudinal guide rail 61.

[0035] In this embodiment, the longitudinal transmission mechanism includes longitudinal pulley supports 64 provided at both ends of the longitudinal guide rail 61. Longitudinal pulleys are provided in the longitudinal pulley supports 64, and a longitudinal transmission belt is provided between the longitudinal pulleys on both sides. The longitudinal slider 62 is connected to the longitudinal transmission belt. The longitudinal guide rail 61 is hollow and has a slit on the upper side. The longitudinal transmission belt is arranged in the longitudinal guide rail 51. The bottom of the longitudinal slider 52 passes through the slit and is connected to the longitudinal transmission belt. The longitudinal transmission belt is a toothed belt to prevent slipping. In other embodiments, the longitudinal transmission mechanism can also adopt a transmission mechanism such as a ball screw.

[0036] Furthermore, in another embodiment, as Figure 7 shown, the vertical movement mechanism 7 of the ultrasonic welding device for the optical material of the LCD display LED backlight module includes a vertical guide rail 71 provided on the longitudinal slider 52. When the longitudinal slider 52 moves, it can drive the vertical guide rail 71 to move longitudinally. A vertical slider 72 is provided on the vertical guide rail 71, and a vertical drive motor 73 is provided on the vertical guide rail 71. The vertical drive motor 73 is connected to the vertical slider 72 through a vertical transmission mechanism. In this embodiment, the vertical transmission mechanism includes a lead screw provided in the vertical guide rail 71. The vertical guide rail 71 is hollow, and the lead screw is provided inside. A nut is provided on the lead screw. There is a slit on the front side of the vertical guide rail 71, and the nut passes through the slit and connects the vertical slider 72 to the nut. The vertical drive motor 73 is a stepper motor, and the vertical drive motor 73 is controlled by a PLC controller, so that it can further drive the vertical slider 72 to move up and down on the vertical guide rail 71 through the lead screw-nut transmission mechanism. The ultrasonic welding gun 2 is installed on the vertical slider 72, and the moving frame can drive the ultrasonic welding gun 2 to move in three-dimensional space to change different welding stations.

[0037] Furthermore, in another embodiment, in combination with Figures 1-7As shown in the figure, the ultrasonic welding device for the optical material of the LED backlight module of the liquid crystal display screen is provided with a lateral movement sensor on the lateral slider 52, and a lateral drag chain 57 for arranging lines is provided on the support frame. The power supply and signal lines of the lateral movement sensor and the longitudinal drive motor 63 are arranged in the lateral drag chain 57; a longitudinal movement sensor is provided on the longitudinal slider 62, and a longitudinal drag chain 65 is provided on the longitudinal guide rail 61. The power supply and signal lines of the vertical drive motor 73 and the longitudinal movement sensor are arranged in the longitudinal drag chain 65; a vertical movement sensor is provided on the vertical slider 72, and a vertical drag chain 74 is provided on the vertical guide rail 71. The power supply and signal lines of the vertical movement sensor are arranged in the vertical drag chain 74. By setting the lateral movement sensor, the longitudinal movement sensor and the vertical movement sensor, the position of the ultrasonic welding gun 2 can be fed back to the PLC controller in real time, so that the PLC controller can know the current position of the ultrasonic welding gun 2.

[0038] Further, in another embodiment, in combination with Figures 1-7 As shown in the figure, there are two ultrasonic welding guns 2 for the ultrasonic welding device of the optical material of the LED backlight module of the liquid crystal display screen, and there are also two sets of corresponding moving frames. The two sets of moving frames are arranged symmetrically left and right on the support frame 1, and the two ultrasonic welding guns 2 are respectively arranged on the two sets of moving frames. Therefore, when the ultrasonic welding device for the optical material of the LED backlight module of the liquid crystal display screen is working, two ultrasonic welding guns 2 are used for synchronous welding, which improves the welding efficiency.

[0039] In combination with Figure 8 As shown in the figure, the ultrasonic welding gun 2 includes a gun head in the middle and a gun head mounting plate 21 at the rear. The gun head is arranged on the gun head mounting plate 21. A welding depth limiting plate 22 is provided on the lower side of the gun head mounting plate 21. There is a notch on the welding depth limiting plate 22. The front end of the gun head passes through the notch on the welding depth limiting plate 22. The welding depth limiting plate 22 is connected to the lower side of the gun head mounting plate 21 through a guide rod 24 and an adjusting bolt 23. The height of the welding depth limiting plate 22 can be adjusted by the adjusting bolt 23, so as to adjust the welding depth of the welding PIN needle at the lower end of the gun head.

[0040] In addition, the gun head of the ultrasonic welding gun 2 can be rotated by 90 degrees. In combination with Figure 9 As shown in the figure, the ultrasonic welding gun 2 performs welding along the welding track c. Each time it welds horizontally, a horizontal welding spot a in the figure is formed. When it transfers to the longitudinal direction for welding, the gun head rotates 90 degrees. Each time it welds longitudinally, a longitudinal welding spot b in the figure is formed, making the welding conversion more convenient.

[0041] The working mode of the ultrasonic welding device for the optical material of the LED backlight module of the liquid crystal display screen is as follows:

[0042] (1)Place the product to be welded on the welding platform. The product to be welded is an optical material for the LED backlight module of a liquid crystal display screen.

[0043] When placing the product to be welded on the welding platform, it is placed by an equipment manipulator, a module, or a fork. Among them, the equipment manipulator is equipped with a suction cup, and the module and the fork are special tools for handling the optical material of the LED backlight module of a liquid crystal display screen.

[0044] (2)Set the welding parameters of the ultrasonic soldering gun according to the product welding requirements. The parameter setting is carried out from the soldering gun controller of the ultrasonic soldering gun;

[0045] Among them, the following parameters of the ultrasonic soldering gun are controlled by the soldering gun controller:

[0046] Control the welding energy by controlling the percentage of the amplitude by the soldering gun controller. The range of the amplitude percentage is 0 - 100%;

[0047] Control the welding effect by controlling the welding time. The range of the welding time is 0 - 20 seconds;

[0048] Select the ultrasonic frequency according to different product materials. The frequency range is 20KHZ - 500MHZ;

[0049] Select an ultrasonic soldering gun with welding PIN needles of corresponding length and diameter according to the number of layers of the welded product;

[0050] During welding, press the welding PIN needle of the ultrasonic soldering gun on the welding path of the product to be welded, and set different pressures according to different products. The range of the pressure magnitude is 0 - 10kgf;

[0051] The welding distance at different welding positions set on the product is determined according to the product requirements, and the distance varies from 0 to 500mm;

[0052] Select an ultrasonic soldering gun with a corresponding welding angle according to the welding requirements of the product. Here, the welding angle is the included angle between the welding PIN needle and the product to be welded when the welding PIN needle is pressed on the product to be welded.

[0053] (3)Control the moving frame through the controller to move the ultrasonic soldering gun to a suitable welding position, and then control the vertical moving mechanism of the moving frame through the controller to press the welding PIN needle of the ultrasonic soldering gun into the product to be welded;

[0054] Complete the welding process according to the set welding time. After welding at one point is completed, control the vertical moving mechanism of the moving frame through the controller to lift the ultrasonic soldering gun.

[0055] (4)According to the set process path, the controller controls the transverse movement mechanism and the longitudinal movement mechanism of the moving frame, carrying the ultrasonic welding gun to move horizontally and vertically to different welding points. At each welding point, the ultrasonic welding gun is controlled by the controller to perform welding according to the method in step (3) above;

[0056] (5)After welding is completed, the welded product is taken away by the equipment manipulator, module or fork.

[0057] Compared with the traditional manufacturing process, since the ultrasonic welding method does not require the use of spray valves and UV lamps, the component cost of each station is reduced; and through the ultrasonic welding and pasting method, UV glue is saved, reducing the raw material cost; the requirement for the flatness of the equipment is reduced, saving the processing technology cost of the workpiece; when the optical material of the liquid crystal display LED backlight module is placed on the welding platform 4, it is positioned by relying on the edge. By positioning the product by relying on the edge, the positioning is more rapid and convenient; the length, diameter and spacing of the welding and pasting PIN needles of the ultrasonic welding gun 2 can be determined according to the welding process requirements, and the length of the pressing block where the PIN needles are located is selected according to the ultrasonic power. There is no disadvantage of poor uniformity in welding and pasting; through the welding and pasting method, multi-layer welding can be carried out, improving production efficiency and reducing equipment costs.

[0058] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic welding device for an optical material of an LED backlight module of a liquid crystal display screen, characterized in that: It includes a support frame and an ultrasonic soldering gun. A soldering platform for placing the optical materials of the LED backlight module of the liquid crystal display screen is provided on the support frame, and a moving frame for driving the ultrasonic soldering gun to change the soldering position. The moving frame includes a lateral moving mechanism arranged on the support frame. A longitudinal moving mechanism is provided on the lateral moving mechanism, and a vertical moving mechanism is provided on the longitudinal moving mechanism. The ultrasonic soldering gun is arranged on the vertical moving mechanism.

2. The ultrasonic welding device for the optical material of the LED backlight module of the liquid crystal display screen according to claim 1, wherein: The lateral moving mechanism includes two lateral guide rails arranged in parallel on the support frame. Lateral sliders are provided on the lateral guide rails. A lateral driving motor is provided on the support frame. The rotating shaft of the lateral driving motor is connected with a lateral gearbox. Lateral driving shafts are respectively connected to both sides of the lateral gearbox. The lateral driving shafts are respectively connected with the lateral sliders through lateral transmission mechanisms.

3. The ultrasonic welding device for the optical material of the LED backlight module of the liquid crystal display screen according to claim 2, wherein: The lateral transmission mechanism includes lateral pulley supports arranged at both ends of the lateral guide rails. Lateral pulleys are provided in the lateral pulley supports. A lateral transmission belt is provided between the lateral pulleys on both sides. The lateral slider is connected with the lateral transmission belt.

4. The ultrasonic welding device for the optical material of the LED backlight module of the liquid crystal display screen according to claim 3, characterized in that: The longitudinal moving mechanism includes a longitudinal guide rail arranged between the lateral sliders provided on the two lateral guide rails. A longitudinal slider is provided on the longitudinal guide rail. A longitudinal driving motor is provided on the longitudinal guide rail. The longitudinal driving motor is connected with the longitudinal slider through a longitudinal transmission mechanism.

5. The ultrasonic welding device for the optical material of the LED backlight module of the liquid crystal display screen according to claim 4, wherein: The longitudinal transmission mechanism includes longitudinal pulley supports arranged at both ends of the longitudinal guide rail. Longitudinal pulleys are provided in the longitudinal pulley supports. A longitudinal transmission belt is provided between the longitudinal pulleys on both sides. The longitudinal slider is connected with the longitudinal transmission belt.

6. The ultrasonic welding device for the optical material of the LED backlight module of the liquid crystal display screen according to claim 5, characterized in that: The vertical moving mechanism includes a vertical guide rail arranged on the longitudinal slider. A vertical slider is provided on the vertical guide rail. A vertical driving motor is provided on the vertical guide rail. The vertical driving motor is connected with the vertical slider through a vertical transmission mechanism.

7. The ultrasonic welding device for the optical material of the LED backlight module of the liquid crystal display screen according to claim 6, wherein: The vertical transmission mechanism includes a lead screw arranged in the vertical guide rail. A nut is provided on the lead screw. The vertical slider is connected with the nut.

8. The ultrasonic welding device for the optical material of the liquid crystal display LED backlight module according to claim 6, wherein: A lateral moving sensor is provided on the lateral slider, and a lateral cable carrier for arranging wires is provided on the support frame; a longitudinal moving sensor is provided on the longitudinal slider, and a longitudinal cable carrier is provided on the longitudinal guide rail; a vertical moving sensor is provided on the vertical slider, and a vertical cable carrier is provided on the vertical guide rail; There are two ultrasonic soldering guns, and two sets of corresponding moving frames are provided. The two sets of moving frames are arranged symmetrically left and right on the support frame. The two ultrasonic soldering guns are respectively arranged on the two sets of moving frames.

9. The ultrasonic welding device for liquid crystal display LED backlight module optical materials according to claim 1, characterized in that: The ultrasonic soldering gun includes a gun head and a gun head mounting plate. The gun head is arranged on the gun head mounting plate. A soldering depth limiting plate is provided on the lower side of the gun head mounting plate. The front end of the gun head passes through the soldering depth limiting plate. The soldering depth limiting plate is connected to the lower side of the gun head mounting plate through a guide rod and an adjusting bolt.

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