Welding device and method for liquid crystal module backlight FPC

Abstract

The invention discloses a liquid crystal module backlight FPC welding device and method, and relates to the technical field of welding. According to the welding device and method for the backlight FPC of the liquid crystal module, through mutual cooperation of the bearing disc, the containing block, the limiting mechanism and the pushing frame mechanism, the liquid crystal module and the backlight FPC are placed at the corresponding positions in the limiting mechanism, and the limiting mechanism can preliminarily limit the liquid crystal module and the backlight FPC; in the process that the limiting mechanism rotates to pass through the position under the pushing frame mechanism, the pushing frame mechanism can drive the limiting mechanism to complete automatic pressing operation before the liquid crystal module and the backlight FPC are welded, so that a contact on the backlight FPC can be automatically and tightly aligned with a welding point on the liquid crystal module; and in the pressing process, the limiting mechanism can purge contacts on the backlight FPC and welding points on the liquid crystal module in time, floating ash or impurities adhering to the surfaces of the contacts and the welding points are blown away in time, and automatic cleaning of the welding positions of the backlight FPC and the liquid crystal module is achieved.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, in particular to a welding device and method for a liquid crystal module backlight source FPC. Background Art

[0002] The application of FPC in LCD module backlight source, that is, flexible circuit board in LCD module backlight source, is a highly flexible, bendable and foldable circuit board. It uses polyimide or polyester film as the substrate and makes circuit patterns on it through a special process, thereby realizing circuit connection and signal transmission.

[0003] The existing welding device and method of the LCD module backlight FPC are difficult to automatically press the overlapping part of the LCD module and the backlight FPC downward before welding the LCD module and the backlight FPC, so that the contacts on the backlight FPC are closely aligned with the welding points on the LCD module, which can easily affect the subsequent welding effect, and it is difficult to blow and clean the contacts on the backlight FPC and the welding points on the LCD module in time, which can easily cause welding defects. Therefore, it is necessary to provide a welding device and method of the LCD module backlight FPC to solve the above-mentioned technical problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a welding device and method for a liquid crystal module backlight FPC, which solves the problems that, before the liquid crystal module and the backlight FPC are welded and connected, it is difficult to automatically press the overlapping part of the liquid crystal module and the backlight FPC downward so that the contacts on the backlight FPC are closely aligned with the welding points on the liquid crystal module, which easily affects the subsequent welding effect, and it is difficult to blow and clean the contacts on the backlight FPC and the welding points on the liquid crystal module in time, which easily leads to welding defects.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A welding device for a liquid crystal module backlight source FPC, including a welding base, and also including:

[0006] A mechanical arm is fixedly arranged at the top rear end of the welding machine base, a welding gun is arranged at the front bottom of the mechanical arm, and is used to weld the liquid crystal module and the backlight source FPC together, a carrying plate is rotatably arranged at the top of the welding machine base, a servo motor is fixedly arranged at the top of the inner cavity of the welding machine base, and the output shaft of the servo motor passes through the top of the welding machine base and is fixedly connected to the middle of the bottom of the carrying plate, a plurality of placement blocks are evenly fixedly arranged in a circle on the outer side of the top of the carrying plate, and a controller is fixedly arranged at the left rear end of the top of the welding machine base;

[0007] A plurality of limiting mechanisms, used for limiting the position of the liquid crystal module and the backlight source FPC, wherein the plurality of limiting mechanisms are respectively arranged on the top of the corresponding placement blocks;

[0008] The push frame mechanism is used to drive the limiting mechanism to complete the pressing operation of the liquid crystal module and the backlight source FPC before welding. The push frame mechanism is fixedly arranged on the top of the welding machine base and located above the rear end of the carrying plate.

[0009] Preferably, each of the limiting mechanisms includes a substrate, which is arranged on the top of the corresponding placement block by bolts, and a first placement groove for placing the liquid crystal module is opened on one side of the top of the substrate, and a second placement groove for placing the backlight source FPC is opened on the other side of the top of the substrate.

[0010] Preferably, U-shaped frames are fixedly provided on both sides of the top of the base plate, two connecting cross plates are slidably provided between the two U-shaped frames, the two connecting cross plates are respectively located at both ends of the base plate, a first lower pressure block assembly is fixedly provided between the middle parts of the two connecting cross plates, and a second lower pressure block assembly is fixedly provided between the two connecting cross plates and on both sides of the first lower pressure block assembly.

[0011] Preferably, the first pressing block assembly and the second pressing block assembly have the same structure, a plurality of hollow boxes are fixedly provided at the bottom of the first pressing block assembly, a plurality of air outlet holes are opened at the bottom of each of the hollow boxes, two confluence boxes are fixedly provided at the bottom of the first pressing block assembly and on one side of the hollow box, the bottom of each of the confluence boxes is fixedly connected with an air guide nozzle, and confluence bends are fixedly provided at the bottom of the two second pressing block assemblies, and the ends of the two confluence bends close to each other are respectively fixedly connected with one end of the corresponding confluence box.

[0012] Preferably, a shaft rod is fixedly provided in the middle of the top of each of the two second lower pressure block assemblies, the top of the shaft rod slides through the top of the corresponding U-shaped frame and a sphere is fixedly provided thereon, and a first spring is sleeved on the outside of the shaft rod, and the first spring is located between the upper part of the U-shaped frame and the bottom of the sphere.

[0013] Preferably, the first lower pressure block assembly includes a transverse plate, which is fixedly connected between two connecting transverse plates, a protective cover is fixedly arranged on the top of the transverse plate, a plurality of support tubes located in the protective cover are evenly fixedly arranged on the top of the transverse plate, and a piston block is slidably arranged between the inner walls of each support tube.

[0014] Preferably, a piston rod is fixedly arranged in the middle of the bottom of the piston block, the bottom of the piston rod slides through the bottom of the support tube and the bottom of the cross plate and is fixedly arranged with a rubber ball, and a second spring is sleeved on the outside of the piston rod, and the second spring is located in the support tube and below the piston block.

[0015] Preferably, the tops of both sides of the support tube are fixedly connected with branch pipes, the bottom of each branch pipe is fixedly passed through the bottom of the horizontal plate, the top of each hollow box is fixedly connected with the bottom of the corresponding branch pipe, a breathable mesh plate is fixedly passed through the side wall of the protective cover, and a through hole is opened at the bottom of the side wall of the support tube.

[0016] Preferably, the pushing frame mechanism includes two L-shaped brackets, both of which are fixedly connected to the top of the welding machine base and located on the left and right sides of the robotic arm, a first wedge-shaped protrusion is fixedly arranged between the bottoms of the two L-shaped brackets, and a second wedge-shaped protrusion is fixedly arranged between the bottoms of the two L-shaped brackets, and the second wedge-shaped protrusion is located directly in front of the first wedge-shaped protrusion.

[0017] The present invention also provides a method for welding a liquid crystal module backlight source FPC, using a welding device for a liquid crystal module backlight source FPC, and the specific method includes the following steps:

[0018] Step 1: The servo motor drives the carrier plate to rotate clockwise. When one of the limit mechanisms rotates to the front end, the servo motor stops working, the carrier plate stops rotating, and then the LCD module and the backlight FPC are placed at the corresponding positions in the front end limit mechanism. Then the servo motor is started again to drive the carrier plate to continue to rotate clockwise, driving the limit mechanism, the LCD module and the backlight FPC to rotate.

[0019] Step 2: When the limit mechanism rotates and passes directly below the push frame mechanism, the push frame mechanism drives the limit mechanism to complete the automatic pressing operation of the liquid crystal module and the backlight FPC before welding, so that the contact points on the backlight FPC are closely aligned with the welding points on the liquid crystal module, and the limit mechanism automatically purges the contact points on the backlight FPC and the welding points on the liquid crystal module during the pressing process. After the pressing and positioning operation is completed, the servo motor drives the carrier plate to continue rotating;

[0020] Step 3. When the LCD module and the backlight FPC are rotated to the rear end, the servo motor stops working, the carrier plate stops rotating, and the robotic arm controls the welding gun to perform welding operations on the LCD module and the backlight FPC below, welding the contacts on the backlight FPC to the welding points on the LCD module. After welding, the robotic arm drives the welding gun to move up and return to its original position, and the servo motor drives the carrier plate to continue rotating. When the limit mechanism rotates and drives away from the bottom of the push frame mechanism, the limit mechanism automatically releases the pressing of the LCD module and the backlight FPC, and then the welded LCD module and backlight FPC can be removed.

[0021] Beneficial Effects

[0022] The present invention provides a device and method for welding FPC of a liquid crystal module backlight source. Compared with the prior art, the device and method have the following beneficial effects:

[0023] 1. A welding device and method for a liquid crystal module backlight FPC, through the mutual cooperation between a carrier plate, a placement block, a limiting mechanism and a pushing frame mechanism, the liquid crystal module and the backlight FPC are placed at corresponding positions in the limiting mechanism, the limiting mechanism can initially limit the liquid crystal module and the backlight FPC, and then when the limiting mechanism rotates and passes directly under the pushing frame mechanism, the pushing frame mechanism can drive the limiting mechanism to complete the automatic pressing operation of the liquid crystal module and the backlight FPC before welding, so that the contacts on the backlight FPC and the welding points on the liquid crystal module can be automatically and tightly aligned, and during the pressing process, the limiting mechanism can timely purge the contacts on the backlight FPC and the welding points on the liquid crystal module, and timely blow away the floating dust or impurities adhering to their surfaces, so as to realize automatic cleaning of the welding points between the backlight FPC and the liquid crystal module.

[0024] 2. A welding device and method for a liquid crystal module backlight FPC, through the mutual cooperation between a first pressing block assembly, a second pressing block assembly, a shaft, a ball, a first spring, a first wedge-shaped protrusion and a second wedge-shaped protrusion, when the two balls rotate with the carrier plate, one of the balls passes directly under the first wedge-shaped protrusion, and the other ball passes directly under the second wedge-shaped protrusion, because the left and right sides of the first wedge-shaped protrusion and the second wedge-shaped protrusion are both inclined, under the action of the inclined surface of the left part of the wedge-shaped protrusion, the two balls are first pushed downward, thereby pushing the second pressing block assembly, the connecting cross plate and the first pressing block assembly downward, and the two second pressing block assemblies can be used to press the liquid crystal module and the backlight FPC downward and fix them respectively, and the first pressing block assembly can be used to press the overlapping part of the liquid crystal module and the backlight FPC downward and fix them, so that the contact points on the backlight FPC are closely aligned with the welding points on the liquid crystal module, thereby ensuring the subsequent welding effect.

[0025] 3. A welding device and method for a liquid crystal module backlight FPC. Through the mutual cooperation between a support tube, a piston block, a rubber ball, a branch pipe, an air outlet, a confluence elbow and an air guide nozzle, when the first pressing block assembly and the second pressing block assembly are pushed downward, the rubber ball first contacts the top of the liquid crystal module and the backlight FPC. After the rubber ball contacts the top of the liquid crystal module and the backlight FPC, the support tube is continuously pushed downward. With the cooperation of the piston block, the gas in the support tube can be pushed outward through the branch pipe and finally discharged through each air outlet. Since the branch pipes in the second pressing block assembly are fixedly connected with the top of the confluence elbow, similarly, during the downward movement of the second pressing block assembly, the gas in the second pressing block assembly is pushed outward through the confluence elbow and enters the confluence box, and finally discharged through the air guide nozzle. The discharged gas can be blown toward the contacts on the backlight FPC and the welding points on the liquid crystal module, and the floating dust or impurities adhering to the surface thereof can be blown away in time, and the use effect is better.

[0026] 4. A welding device and method for a liquid crystal module backlight FPC. Through the mutual cooperation between the substrate and the placement block, the limiting mechanism can be flexibly removed from the placement block and replaced with limiting mechanisms of different specifications, so that it can limit liquid crystal modules and backlight FPCs of different specifications, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A perspective view of the present invention;

[0028] Figure 2 is a three-dimensional diagram of the carrier plate of the present invention;

[0029] Figure 3 It is a three-dimensional diagram of the limiting mechanism of the present invention;

[0030] Figure 4 It is an exploded view of the limiting mechanism of the present invention;

[0031] Figure 5 It is an assembly diagram of the U-shaped frame, the connecting horizontal plate, the first lower pressing block assembly and the second lower pressing block assembly of the present invention;

[0032] Figure 6 It is an exploded view of the U-shaped frame, the connecting horizontal plate, the first lower pressing block assembly and the second lower pressing block assembly of the present invention;

[0033] Figure 7 is a first stereoscopic view of the first lower pressing block assembly of the present invention;

[0034] Figure 8 is a second stereoscopic view of the first lower pressing block assembly of the present invention;

[0035] Fig. 9 For the present invention Figure 8 A partial enlarged view of the middle A;

[0036] Fig.10 is a sectional stereoscopic view of the first lower pressing block assembly of the present invention;

[0037] Fig.11 It is a sectional stereoscopic view of the support tube of the present invention;

[0038] Fig.12 is a three-dimensional diagram of the second lower pressing block assembly of the present invention;

[0039] Fig.13 It is a three-dimensional diagram of the confluence elbow of the present invention;

[0040] Fig.14 It is a three-dimensional diagram of the push frame mechanism of the present invention.

[0041] In the figure: 1. welding machine base; 2. mechanical arm; 3. bearing plate; 4. placement block; 5. limiting mechanism; 51. base plate; 52. first placement slot; 53. second placement slot; 54. U-shaped frame; 55. connecting cross plate; 56. first pressing block assembly; 561. cross plate; 562. protective cover; 563. support tube; 564. piston block; 565. piston rod; 566. rubber ball; 567. second spring; 568. branch pipe; 569. air permeable mesh plate; 57. second pressing block assembly; 58. hollow box; 59. air outlet; 510. confluence box; 511. air guide nozzle; 512. confluence elbow; 513. shaft rod; 514. sphere; 515. first spring; 6. pushing frame mechanism; 61. L-shaped bracket; 62. first wedge-shaped protrusion; 63. second wedge-shaped protrusion; 7. controller; 8. welding gun. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] The present invention provides two technical solutions:

[0044] like Figure 1 and Figure 2 The first embodiment is shown: a welding device for a liquid crystal module backlight source FPC, comprising a welding base 1, and further comprising:

[0045] A mechanical arm 2 is fixedly arranged at the top rear end of the welding machine base 1. A welding gun 8 is arranged at the front bottom of the mechanical arm 2 for welding the liquid crystal module and the backlight source FPC together. A carrying plate 3 is rotatably arranged at the top of the welding machine base 1. A servo motor is fixedly arranged at the top of the inner cavity of the welding machine base 1. The output shaft of the servo motor passes through the top of the welding machine base 1 and is fixedly connected to the middle of the bottom of the carrying plate 3. A plurality of placement blocks 4 are evenly fixedly arranged on the outer side of the top of the carrying plate 3. A controller 7 is fixedly arranged at the top left rear end of the welding machine base 1.

[0046] A plurality of limiting mechanisms 5, used for limiting the position of the liquid crystal module and the backlight source FPC, wherein the plurality of limiting mechanisms 5 are respectively arranged on the top of the corresponding placement blocks 4;

[0047] The push frame mechanism 6 is used to drive the limiting mechanism 5 to complete the pressing operation of the liquid crystal module and the backlight FPC before welding. The push frame mechanism 6 is fixedly arranged on the top of the welding machine base 1 and located above the rear end of the carrier plate 3.

[0048] Through the mutual cooperation among the carrying plate 3, the placement block 4, the limiting mechanism 5 and the pushing frame mechanism 6, the liquid crystal module and the backlight source FPC are placed at corresponding positions in the limiting mechanism 5, and the limiting mechanism 5 can perform preliminary limiting on the liquid crystal module and the backlight source FPC. Thereafter, when the limiting mechanism 5 rotates and passes directly under the pushing frame mechanism 6, the pushing frame mechanism 6 can drive the limiting mechanism 5 to complete the automatic pressing operation of the liquid crystal module and the backlight source FPC before welding, so that the contacts on the backlight source FPC and the welding points on the liquid crystal module can be automatically and tightly aligned, and during the pressing process, the limiting mechanism 5 can timely blow away the contacts on the backlight source FPC and the welding points on the liquid crystal module, and timely blow away the floating dust or impurities adhering to the surface, thereby realizing automatic cleaning of the welding points between the backlight source FPC and the liquid crystal module.

[0049] like Figures 3 to 14A second embodiment is shown, which is mainly different from the first embodiment in that: a welding device for a liquid crystal module backlight source FPC, each limiting mechanism 5 includes a substrate 51, the substrate 51 is arranged on the top of the corresponding placement block 4 by bolts, a first placement groove 52 for placing the liquid crystal module is opened on one side of the top of the substrate 51, and a second placement groove 53 for placing the backlight source FPC is opened on the other side of the top of the substrate 51, U-shaped frames 54 are fixedly arranged on both sides of the top of the substrate 51, two connecting horizontal plates 55 are slidably arranged between the two U-shaped frames 54, and the two connecting horizontal plates 55 are respectively located at the two ends of the substrate 51, and a first lower pressing block assembly 56 is fixedly arranged between the middle parts of the two connecting horizontal plates 55, and between the two connecting horizontal plates 55 Second pressing block assemblies 57 are fixedly arranged on both sides of the first pressing block assembly 56. The structures of the first pressing block assembly 56 and the second pressing block assembly 57 are the same. A plurality of hollow boxes 58 are fixedly arranged at the bottom of the first pressing block assembly 56. A plurality of air outlet holes 59 are opened at the bottom of each hollow box 58. Two confluence boxes 510 are fixedly arranged at the bottom of the first pressing block assembly 56 and on one side of the hollow box 58. The bottom of each confluence box 510 is fixedly connected with an air guide nozzle 511. Confluence elbows 512 are fixedly arranged at the bottom of the two second pressing block assemblies 57. The ends of the two confluence elbows 512 close to each other are fixedly connected with one end of the corresponding confluence box 510 respectively. The middle of the top of the two second pressing block assemblies 57 is A shaft rod 513 is fixedly provided, the top of the shaft rod 513 slides through the top of the corresponding U-shaped frame 54 and is fixedly provided with a sphere 514, the outer sleeve of the shaft rod 513 is provided with a first spring 515, the first spring 515 is located between the upper part of the U-shaped frame 54 and the bottom of the sphere 514, the first lower pressure block assembly 56 includes a cross plate 561, the cross plate 561 is fixedly connected between the two connecting cross plates 55, a protective cover 562 is fixedly provided on the top of the cross plate 561, a plurality of support tubes 563 located in the protective cover 562 are evenly fixedly provided on the top of the cross plate 561, a piston block 564 is slidably provided between the inner walls of each support tube 563, a piston rod 565 is fixedly provided in the middle of the bottom of the piston block 564, and the bottom of the piston rod 565 slides through A rubber ball 566 is fixedly arranged between the bottom of the support tube 563 and the bottom of the horizontal plate 561, a second spring 567 is sleeved on the outside of the piston rod 565, the second spring 567 is located in the support tube 563 and below the piston block 564, the tops of both sides of the support tube 563 are fixedly connected with branch pipes 568, the bottom of each branch pipe 568 is fixedly passed through the bottom of the horizontal plate 561, the top of each hollow box 58 is fixedly connected with the bottom of the corresponding branch pipe 568, a breathable mesh plate 569 is fixedly passed through the side wall of the protective cover 562, a through hole is opened at the bottom of the side wall of the support tube 563, and the pushing frame mechanism 6 includes two L-shaped brackets 61, the two L-shaped brackets 61 are fixedly connected to the top of the welding machine base 1 and are located on the left and right sides of the robot arm 2,A first wedge-shaped protrusion 62 is fixedly disposed between the bottoms of the two L-shaped brackets 61 , and a second wedge-shaped protrusion 63 is fixedly disposed between the bottoms of the two L-shaped brackets 61 , and the second wedge-shaped protrusion 63 is located directly in front of the first wedge-shaped protrusion 62 .

[0050] Through the mutual cooperation among the first pressing block assembly 56, the second pressing block assembly 57, the shaft 513, the ball 514, the first spring 515, the first wedge-shaped protrusion 62 and the second wedge-shaped protrusion 63, when the two balls 514 rotate with the supporting plate 3, one of the balls 514 passes directly under the first wedge-shaped protrusion 62, and the other ball 514 passes directly under the second wedge-shaped protrusion 63, because the left and right sides of the first wedge-shaped protrusion 62 and the second wedge-shaped protrusion 63 are both inclined, under the action of the inclined surface of the left part of the wedge-shaped protrusion, the two balls 514 are first pushed downward, and then The second pressing block assembly 57, the connecting horizontal plate 55 and the first pressing block assembly 56 are pushed downward, and the two second pressing block assemblies 57 can be used to press down and fix the liquid crystal module and the backlight source FPC respectively, and the first pressing block assembly 56 can be used to press down and fix the overlapping part of the liquid crystal module and the backlight source FPC, so that the contact points on the backlight source FPC are closely aligned with the welding points on the liquid crystal module to ensure the subsequent welding effect, through the mutual coordination between the support tube 563, the piston block 564, the rubber ball 566, the branch pipe 568, the air outlet 59, the confluence elbow 512 and the air guide nozzle 511 When the first pressing block assembly 56 and the second pressing block assembly 57 are pushed downward, the rubber ball 566 first contacts the top of the liquid crystal module and the backlight FPC. After the rubber ball 566 contacts the top of the liquid crystal module and the backlight FPC, the support tube 563 is pushed downward continuously. With the cooperation of the piston block 564, the gas in the support tube 563 can be pushed outward through the branch pipe 568 and finally discharged through each gas outlet 59. Since the branch pipe 568 in the second pressing block assembly 57 is fixedly connected to the top of the confluence elbow 512, the second pressing block assembly 57 moves downward through the branch pipe 568. During the process, the gas in the second pressing block assembly 57 is pushed outward through the Huitong elbow 512, enters the Huitong box 510, and is finally discharged through the air guide nozzle 511. The discharged gas can be blown toward the contacts on the backlight source FPC and the welding points on the liquid crystal module, and the floating dust or impurities adhering to the surface can be blown away in time, so that the use effect is better. Through the mutual cooperation between the substrate 51 and the placement block 4, the limiting mechanism 5 can be flexibly removed from the placement block 4, and the limiting mechanisms 5 of different specifications can be replaced, so that it can limit the liquid crystal modules and backlight source FPC of different specifications, and the scope of application is wide.

[0051] The embodiment of the present invention further provides a method for welding a liquid crystal module backlight source FPC, using a welding device for a liquid crystal module backlight source FPC, and the specific method includes the following steps:

[0052] Step 1: The servo motor drives the carrier plate 3 to rotate clockwise. When one of the limiting mechanisms 5 rotates to the front end, the servo motor stops working, the carrier plate 3 stops rotating, and then the liquid crystal module and the backlight source FPC are placed at the corresponding positions in the front end limiting mechanism 5, wherein the liquid crystal module is placed in the first placement groove 52, the first placement groove 52 is adapted to the liquid crystal module, and the backlight source FPC is placed in the second placement groove 53, the second placement groove 53 is adapted to the backlight source FPC, the liquid crystal module and the backlight source FPC are preliminarily limited, and then the servo motor is started again to drive the carrier plate 3 to continue to rotate clockwise, driving the limiting mechanism 5, the liquid crystal module and the backlight source FPC to rotate;

[0053] Step 2: When the two balls 514 rotate with the carrier plate 3, one of the balls 514 passes directly under the first wedge-shaped protrusion 62, and the other ball 514 passes directly under the second wedge-shaped protrusion 63. Since the left and right sides of the first wedge-shaped protrusion 62 and the second wedge-shaped protrusion 63 are both inclined, under the action of the inclined surface of the left part of the wedge-shaped protrusion, the balls 514 slide along the inclined surface of the wedge-shaped protrusion, and the two balls 514 are first pushed downward, thereby pressing the second lower block assembly 57 and the connecting cross plate 55. The first pressing block assembly 56 is pushed downward, and the two second pressing block assemblies 57 can respectively press down and fix the liquid crystal module and the backlight FPC, and the first pressing block assembly 56 can press down and fix the overlapping part of the liquid crystal module and the backlight FPC, so that the contact points on the backlight FPC and the welding points on the liquid crystal module are closely aligned, wherein the contact points on the backlight FPC and the welding points on the liquid crystal module will not be covered by the first pressing block assembly 56, and in the pressing process, due to the rubber ball 56 6 first contacts with the top of the liquid crystal module and the backlight FPC. After the rubber ball 566 contacts with the top of the liquid crystal module and the backlight FPC, the support tube 563 is pushed downwards continuously. With the cooperation of the piston block 564, the gas in the support tube 563 can be pushed outwards through the branch pipe 568 and finally discharged through each gas outlet 59. Since the branch pipes 568 in the second lower pressing block assembly 57 are fixedly connected with the top of the confluence elbow 512, similarly, during the downward movement of the second lower pressing block assembly 57, the second lower pressing block assembly The gas in the component 57 is pushed outward through the confluence elbow 512, enters the confluence box 510, and is finally discharged through the air guide nozzle 511. The discharged gas is blown toward the contact points on the backlight FPC and the welding points on the liquid crystal module, and the floating dust or impurities adhering to the surface are blown away in time. Then the ball 514 slides along the bottom of the wedge-shaped protrusion, and the first lower pressing block assembly 56 and the second lower pressing block assembly 57 are used to complete the pressing operation of the liquid crystal module and the backlight FPC, and the servo motor drives the carrier plate 3 to continue to rotate;

[0054] Step three, when the LCD module and the backlight source FPC are rotated to the rear end, the servo motor stops working, the carrier plate 3 stops rotating, and the robot arm 2 controls the welding gun 8 to perform welding operations on the LCD module and the backlight source FPC below, and welds the contacts on the backlight source FPC to the welding points on the LCD module. After welding, the robot arm 2 drives the welding gun 8 to move up and return to its original position, wherein the robot arm 2 and the welding gun 8 belong to the prior art known to those skilled in the art. The servo motor drives the carrier plate 3 to continue rotating. When the limiting mechanism 5 rotates and drives away from the bottom of the pushing frame mechanism 6, the limiting mechanism 5 automatically releases the pressing of the LCD module and the backlight source FPC, and then the welded LCD module and backlight source FPC can be taken away.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for a liquid crystal module backlight source FPC, comprising a welding base (1), characterized in that: Also includes: A mechanical arm (2) is fixedly arranged at the top rear end of a welding machine base (1); a welding gun (8) is arranged at the front bottom of the mechanical arm (2) for welding the liquid crystal module and the backlight source FPC together; a carrying plate (3) is rotatably arranged at the top of the welding machine base (1); a servo motor is fixedly arranged at the top of the inner cavity of the welding machine base (1); the output shaft of the servo motor passes through the top of the welding machine base (1) and is fixedly connected to the middle of the bottom of the carrying plate (3); a plurality of placement blocks (4) are evenly fixedly arranged in a circle on the outer side of the top of the carrying plate (3); and a controller (7) is fixedly arranged at the left rear end of the top of the welding machine base (1); A plurality of limiting mechanisms (5) for limiting the position of the liquid crystal module and the backlight source FPC, wherein the plurality of limiting mechanisms (5) are respectively arranged on the top of the corresponding placement blocks (4); The push frame mechanism (6) is used to drive the limiting mechanism (5) to complete the pressing operation of the liquid crystal module and the backlight source FPC before welding. The push frame mechanism (6) is fixedly arranged on the top of the welding machine base (1) and is located above the rear end of the carrier plate (3).

2. The welding device for a liquid crystal module backlight FPC according to claim 1, characterized in that: Each of the limiting mechanisms (5) comprises a base plate (51), the base plate (51) being arranged on the top of a corresponding placement block (4) by means of bolts, a first placement groove (52) for placing a liquid crystal module being provided on one side of the top of the base plate (51), and a second placement groove (53) for placing a backlight source FPC being provided on the other side of the top of the base plate (51).

3. The welding device for a liquid crystal module backlight FPC according to claim 2, characterized in that: U-shaped frames (54) are fixedly arranged on both sides of the top of the base plate (51), two connecting transverse plates (55) are slidably arranged between the two U-shaped frames (54), the two connecting transverse plates (55) are respectively located at two ends of the base plate (51), a first lower pressing block assembly (56) is fixedly arranged between the middle parts of the two connecting transverse plates (55), and a second lower pressing block assembly (57) is fixedly arranged between the two connecting transverse plates (55) and on both sides of the first lower pressing block assembly (56).

4. The welding device for a liquid crystal module backlight FPC according to claim 3, characterized in that: The structures of the first lower pressing block assembly (56) and the second lower pressing block assembly (57) are the same. A plurality of hollow boxes (58) are fixedly arranged at the bottom of the first lower pressing block assembly (56), and a plurality of air outlet holes (59) are opened at the bottom of each of the hollow boxes (58). Two confluence boxes (510) are fixedly arranged at the bottom of the first lower pressing block assembly (56) and on one side of the hollow box (58). The bottom of each of the confluence boxes (510) is fixedly connected to an air guide nozzle (511). Confluence bends (512) are fixedly arranged at the bottom of the two second lower pressing block assemblies (57), and the ends of the two confluence bends (512) that are close to each other are fixedly connected to one end of the corresponding confluence box (510).

5. The welding device for a liquid crystal module backlight FPC according to claim 3, characterized in that: A shaft rod (513) is fixedly arranged in the middle of the top of each of the two second lower pressure block assemblies (57); the top of the shaft rod (513) slides through the top of the corresponding U-shaped frame (54) and is fixedly provided with a sphere (514); the outer portion of the shaft rod (513) is sleeved with a first spring (515), and the first spring (515) is located between the upper portion of the U-shaped frame (54) and the bottom portion of the sphere (514).

6. The welding device for a liquid crystal module backlight FPC according to claim 4, characterized in that: The first lower pressure block assembly (56) includes a transverse plate (561), which is fixedly connected between two connecting transverse plates (55), and a protective cover (562) is fixedly arranged on the top of the transverse plate (561). A plurality of support tubes (563) located in the protective cover (562) are evenly fixedly arranged on the top of the transverse plate (561), and a piston block (564) is slidably arranged between the inner walls of each support tube (563).

7. The welding device for a liquid crystal module backlight FPC according to claim 6, characterized in that: A piston rod (565) is fixedly arranged in the middle of the bottom of the piston block (564). The bottom of the piston rod (565) slides through the bottom of the support tube (563) and the bottom of the cross plate (561) and is fixedly arranged with a rubber ball (566). A second spring (567) is sleeved on the outside of the piston rod (565). The second spring (567) is located in the support tube (563) and below the piston block (564).

8. The welding device for a liquid crystal module backlight FPC according to claim 6, characterized in that: The tops of both sides of the support tube (563) are fixedly connected with branch pipes (568), the bottom of each branch pipe (568) is fixedly passed through the bottom of the horizontal plate (561), the top of each hollow box (58) is fixedly connected with the bottom of the corresponding branch pipe (568), a breathable mesh plate (569) is fixedly passed through the side wall of the protective cover (562), and a through hole is opened at the bottom of the side wall of the support tube (563).

9. The welding device for a liquid crystal module backlight FPC according to claim 1, characterized in that: The pushing frame mechanism (6) comprises two L-shaped brackets (61), the two L-shaped brackets (61) are fixedly connected to the top of the welding machine base (1) and are located on the left and right sides of the robot arm (2), a first wedge-shaped protrusion (62) is fixedly arranged between the bottoms of the two L-shaped brackets (61), and a second wedge-shaped protrusion (63) is fixedly arranged between the bottoms of the two L-shaped brackets (61), and the second wedge-shaped protrusion (63) is located directly in front of the first wedge-shaped protrusion (62).

10. A method for welding a liquid crystal module backlight FPC, characterized in that: Using the welding device for the liquid crystal module backlight FPC as described in any one of claims 1 to 9, the method comprises the following steps: Step 1: The servo motor drives the carrier plate (3) to rotate clockwise. When one of the limit mechanisms (5) rotates to the front end, the servo motor stops working, the carrier plate (3) stops rotating, and then the liquid crystal module and the backlight source FPC are placed at corresponding positions in the front end limit mechanism (5). Then, the servo motor is started again to drive the carrier plate (3) to continue rotating clockwise, thereby driving the limit mechanism (5), the liquid crystal module and the backlight source FPC to rotate. Step 2: When the limiting mechanism (5) rotates and passes directly below the pushing frame mechanism (6), the pushing frame mechanism (6) drives the limiting mechanism (5) to complete the automatic pressing operation before welding the liquid crystal module and the backlight source FPC, so that the contacts on the backlight source FPC are closely aligned with the welding points on the liquid crystal module, and during the pressing process, the limiting mechanism (5) automatically purges the contacts on the backlight source FPC and the welding points on the liquid crystal module. After completing the pressing and positioning operation, the servo motor drives the carrier plate (3) to continue rotating; Step 3: When the liquid crystal module and the backlight source FPC are rotated to the rear end, the servo motor stops working, the carrier plate (3) stops rotating, and the mechanical arm (2) controls the welding gun (8) to perform welding operations on the liquid crystal module and the backlight source FPC below, so as to weld the contact points on the backlight source FPC and the welding points on the liquid crystal module together. After welding, the mechanical arm (2) drives the welding gun (8) to move up and return to its original position, and the servo motor drives the carrier plate (3) to continue rotating. When the limit mechanism (5) rotates and drives away from the bottom of the push frame mechanism (6), the limit mechanism (5) automatically releases the pressing of the liquid crystal module and the backlight source FPC, and then the welded liquid crystal module and the backlight source FPC can be taken away.

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