A transmission device for Mini / micro LED laser welding equipment

Abstract

The present invention relates to a transmission device for Mini / micro LED laser welding equipment, comprising a fixed base, an adjustable transmission unit disposed on the fixed base, and a positioning unit mounted in the middle of the fixed base. The present invention solves the following problems existing in the Mini / micro LED laser welding process: substrates are susceptible to slight deformation under high-temperature laser irradiation. This deformation causes the position of the Mini / micro LEDs on the substrate to change relative to the laser head, resulting in an uneven distance between the Mini / micro LEDs on the substrate and the laser head, affecting the efficiency of laser irradiation. Furthermore, varying laser irradiation intensities can cause problems with the Mini / micro LEDs, rendering them inoperable.

Description

Technical Field

[0001] The present invention relates to the technical field of Mini / micro LED laser welding, and in particular to a transmission device for Mini / micro LED laser welding equipment. Background Art

[0002] MiniLED light-emitting crystals are small, and more crystals can be embedded in the backlight panel per unit area, allowing more backlight beads to be integrated on the same screen. MicroLED is a micro light-emitting diode, which is a miniaturized and matrixed LED technology. MicroLED has the characteristics of high brightness, high contrast, high definition, strong reliability, fast response time, greater energy saving, and lower power consumption. In actual production and application, Mini / micro LEDs need to be soldered to the substrate. In the specific operation, solder paste is applied to the substrate, and then the Mini / micro LEDs are placed on the substrate in an orderly manner. The solder paste is melted at high temperature for soldering. With the development of laser technology, laser welding is a more common method to complete this operation.

[0003] When using laser welding technology to weld Mini / micro LEDs to a substrate, it is necessary to ensure the accuracy of the Mini / micro LED's position on the substrate. Therefore, the transmission requirements for the substrate during the welding operation are very strict. However, the following problems exist in the current Mini / micro LED laser welding process: the substrate is prone to slight deformation under the high temperature of the laser. This deformation causes the position of the Mini / micro LED on the substrate to change relative to the laser head, resulting in an uneven distance between the Mini / micro LED on the substrate and the laser head, affecting the efficiency of laser irradiation. What's worse, due to the different laser irradiation intensities, the Mini / micro LED may have problems and cannot be used normally. Summary of the Invention

[0004] (1) Technical issues to be resolved

[0005] The object of the present invention is to provide a transmission device for Mini / micro LED laser welding equipment to solve the problems raised in the above background technology.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A transmission device for Mini / micro LED laser welding equipment, comprising a fixed base, an adjustment transmission unit is provided on the fixed base, and a positioning unit is installed in the middle of the fixed base;

[0008] The adjustment transmission unit includes a fixing frame mounted on the fixing base, a dual-axis motor is mounted inside the fixing frame through a motor seat, adjustment mechanisms are symmetrically provided at both ends of the dual-axis motor, and a conveying mechanism is provided on the adjustment mechanism;

[0009] The adjusting mechanism includes a screw connected to the output end of the dual-axis motor through a coupling, the screw is connected to a fixed plate through a bearing, the fixed plate is mounted on the fixed base, the fixed base is symmetrically provided with limit sliders in front and back, a conveying base is provided on the limit slider in a sliding fit manner, a threaded hole is provided in the middle of the conveying base, the screw is connected to the threaded hole in a threaded engagement manner; and the conveying base is U-shaped, and the conveying mechanism is symmetrically provided on the front and back sides of the side wall of the conveying base;

[0010] The positioning unit includes a positioning frame on the fixed base, two positioning blocks are symmetrically arranged on the left and right sides of the positioning frame (31), a positioning plate is arranged between the two positioning blocks located in the middle of the positioning frame, a transmission mechanism is arranged between the two positioning blocks symmetrically arranged on the left and right sides of the positioning frame, and a positioning mechanism is arranged in the middle of the positioning frame, and a guide alignment mechanism is arranged in the positioning frame;

[0011] The positioning mechanism includes positioning circular holes evenly opened on the positioning plate, a positioning cylinder is installed on the positioning frame, a positioning support plate is installed on the positioning cylinder, positioning rods are evenly arranged on the positioning support plate, and positioning suction cups are arranged on the positioning rods, and the positioning suction cups are located in the positioning circular holes.

[0012] Preferably, the conveying mechanism includes a sprocket mounted on the conveying substrate through a bearing, the number of the sprockets is two and they are arranged in parallel on the conveying substrate front and back, the two sprockets are connected by a chain, a conveying motor is mounted on the conveying substrate through a motor seat, and the output shaft of the conveying motor is connected to the sprocket.

[0013] Preferably, a groove with an Ω-shaped structure is provided in the middle of the positioning block, and a rectangular groove communicating with the groove is provided on the positioning frame.

[0014] Preferably, the transmission mechanism includes mounting grooves symmetrically opened on the front and rear sides of the positioning block, a rotating tube is installed in the mounting groove located on the same central axis through a bearing, a transmission pulley is provided on the outer wall of the rotating tube located between the two adjacent positioning blocks through a bearing, the transmission pulley is connected to the positioning block in a sliding manner, the two corresponding front and rear transmission pulleys are connected by a conveyor belt, a transmission motor is installed on the positioning block located at the left end of the mounting frame through a motor seat, the output shaft of the transmission motor is connected to the rotating tube through a coupling, control cylinders are installed on the positioning blocks located at the left and right ends of the positioning frame, a control board is installed on the control cylinder, and control branches are symmetrically provided on the control board located at the right end of the positioning frame, and the control branches are located in the rotating tube.

[0015] Preferably, the control branch chain includes a control rod arranged on the control plate, the control rod is located in the rotating tube, and a clamping assembly is provided on the rotating tube between the two positioning blocks. The control rod is used to control the operation of the clamping assembly. A driving block is connected to the control rod, and the diameter of the driving block decreases from the middle to both sides.

[0016] Preferably, the clamping assembly includes clamping grooves evenly opened on the rotating tube, a clamping block is provided in the clamping groove, a reset spring is provided between the clamping block and the rotating tube, and a through-slot corresponding to the clamping block is opened on the inner wall of the transmission pulley.

[0017] Preferably, the guide and alignment mechanism includes a bidirectional motor installed inside the positioning frame through a motor seat, a positioning screw is symmetrically arranged on the output shaft of the bidirectional motor, the positioning screw is connected to the inner wall of the positioning frame through a bearing, a support spring rod is arranged on the inner wall of the positioning block groove, a guide frame is arranged on the support spring rod, a moving block is arranged on the positioning screw, each of the moving blocks is provided with a lifting spring rod, a positioning support plate is installed on the lifting spring rod, and the positioning support plate is connected to the positioning guide frame.

[0018] Preferably, the positioning support plate, the positioning block and the front and rear sides of the positioning support plate are all provided with rectangular grooves, and the control execution frame is symmetrically provided on the control plate, and the control execution frame is slidably provided in the rectangular grooves.

[0019] (3) Beneficial effects

[0020] In actual operation, the present invention places the stacked Mini / micro LED substrates on a conveying mechanism, and uses the conveying mechanism to drive the substrates to a designated working position, ensuring that the substrates are within the working range of the laser head, ensuring that the laser head can fully laser bond the Mini / micro LEDs, and ensuring the accuracy of the substrates during movement operations, so that the error of the Mini / micro LEDs after laser bonding welding is guaranteed to be within an allowable range.

[0021] In actual operation, the present invention first lifts up the substrate through the positioning adsorption mechanism, and in this process, the position of the substrate is first fixed by the suction cup. At this time, the substrate is separated from the conveying mechanism. In this state, the conveying mechanism adjusts the position, and the positioning adsorption mechanism drives the substrate down to the working position, ensuring that the substrate will not be deformed even due to heat problems under the adsorption action of the suction cup, ensuring that the Mini / micro LED on the substrate can be smoothly welded. Then, the three-dimensional adjustment unit controls the laser head to perform laser bonding processing on the Mini / micro LED on the substrate one by one during this process, which can improve the stability of the Mini / micro LED in the laser bonding operation, and can perform automatic adaptive adjustment for substrates of various specifications, thereby increasing the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and examples.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a structural diagram of the regulating transmission unit of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the positioning unit of the present invention;

[0026] Figure 4 This invention Figure 3 A first cross-sectional structural schematic diagram;

[0027] Figure 5 This invention Figure 3 A second cross-sectional structural schematic diagram of ;

[0028] Figure 6 It is a schematic diagram of the structure between the rotating tube and the control branch chain of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the positioning block of the present invention. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0031] like Figures 1 to 7 As shown, a transmission device for Mini / micro LED laser welding equipment includes a fixed base 1, an adjustment transmission unit 2 is provided on the fixed base 1, and a positioning unit 3 is installed in the middle of the fixed base 1;

[0032] In actual operation, the above technical solution is adopted. According to the size specifications of different substrates, the transmission unit 2 is first adjusted to ensure that the adjusted transmission unit 2 can stably transmit the substrate. The adjustment transmission unit 2 designed in this operation can be automatically adapted and adjusted, so that substrates of the same specifications can be continuously transported under a unified working state, and substrates of the same specifications can be automatically transported. After the substrate is transported to the positioning unit 3, the positioning unit 3 guides and positions the substrate so that the substrate can be neatly placed to ensure that the Mini / micro LED placed on the substrate can meet the requirements of laser processing, thereby improving the accuracy of laser welding and improving the quality of Mini / microLED laser welding. There is solder paste between the Mini / micro LED and the substrate. After laser heating, the solder paste is in a solution state. At this time, the Mini / micro LED will inevitably shift in the solder paste in the solution state. Therefore, it is necessary to ensure that the position of the substrate is able to meet the requirements of laser processing, thereby ensuring that the error of Mini / micro LED welding on the substrate is within the specified range. By cooperating with the adjustment transmission unit 2 and the positioning unit 3, substrates of different specifications can be uniformly and continuously transported, and the Mini / micro on the substrate can be ensured. The positioning accuracy of LED during laser welding improves the yield of Mini / micro LED laser welding.

[0033] The adjustment transmission unit 2 includes a fixing frame 21 mounted on the fixed base 1, a dual-axis motor 22 is mounted inside the fixing frame 21 through a motor seat, and adjustment mechanisms 23 are symmetrically provided at both ends of the dual-axis motor 22, and a conveying mechanism 24 is provided on the adjustment mechanism 23;

[0034] The adjusting mechanism 23 includes a screw 231 connected to the output end of the dual-axis motor 22 through a coupling, the screw 231 is connected to a fixed plate 232 through a bearing, the fixed plate 232 is mounted on the fixed base 1, and the fixed base 1 is symmetrically provided with limit sliders 233 in front and back. A conveying base 234 is provided on the limit slider 233 in a sliding manner, and a threaded hole is provided in the middle of the conveying base 234. The screw is connected to the threaded hole by threaded engagement. The conveying base 234 has a U-shaped structure, and the conveying mechanism 24 is symmetrically provided on the front and back sides of the side wall of the conveying base 234.

[0035] By adopting the above solution, when conveying the substrate with Mini / micro LED placed thereon, the dual-axis motor 22 is started according to the specifications of the substrate to drive the screw 231 to rotate. During the rotation process, the screw 231 drives the conveying substrate 234 to perform an adjustment movement in the opposite direction through the transmission engagement with the threaded hole. By controlling the width between the two conveying substrates 234, the substrate can be stably and safely placed on the conveying mechanism 24, and the conveying mechanism 24 drives the substrate to be automatically and stably conveyed.

[0036] The conveying mechanism 24 includes a sprocket 241 mounted on the conveying base plate 234 through a bearing. There are two sprockets 241 and they are arranged in parallel on the conveying base plate 234. The two sprockets 241 are connected by a chain 242. A conveying motor 243 is mounted on the conveying base plate 234 through a motor seat, and the output shaft of the conveying motor 243 is connected to the sprocket 241.

[0037] In actual operation using the above technical solution, the substrate is placed on two chains 242, and the conveying motor 243 is started synchronously to drive the chain 242 to move circumferentially. During the movement, the chain 242 synchronously drives the substrate to be displaced and transported at a uniform speed. During this process, the substrate moves to the positioning unit 3, and the position of the substrate is adjusted and positioned by the positioning unit 3.

[0038] The positioning unit 3 includes a positioning frame 31 on the fixed base 1, two positioning blocks 32 are symmetrically arranged on the positioning frame 31, a positioning plate 33 is arranged between the two positioning blocks 32 located in the middle of the positioning frame 31, a transmission mechanism 34 is arranged between the two positioning blocks 32 symmetrically arranged on the left and right sides of the positioning frame 31, and a positioning mechanism 35 is arranged in the middle of the positioning frame 31. A guide and alignment mechanism 36 is arranged inside the positioning frame 31;

[0039] During the displacement process, the substrate moves to the positioning block 32, and the transmission mechanism 34 continues to drive the substrate to move on the positioning block 32. During this process, the guide and alignment mechanism 36 adjusts the position of the substrate so that the placement position of the substrate can meet the requirements of laser processing. The position of the substrate is then fixed by the positioning mechanism 35 so that the lower end of the substrate is tightly attached to the positioning block 32, thereby ensuring the stability of the Mini / micro LED on the substrate during laser welding, and ensuring that the Mini / micro LED after welding is within an acceptable error range.

[0040] The transmission mechanism 34 includes mounting grooves symmetrically opened on the front and rear sides of the positioning block 32, a rotating tube 341 is installed in the mounting groove located on the same central axis through a bearing, a transmission pulley 342 is provided on the outer wall of the rotating tube 341 located between the two adjacent positioning blocks 32 through a bearing, the transmission pulley 342 is connected to the positioning block 32 in a sliding manner, and the two corresponding transmission pulleys 342 in the front and rear are connected by a conveyor belt 343, a transmission motor 344 is installed on the positioning block 32 located at the left end of the mounting frame through a motor seat, and the output shaft of the transmission motor 344 is connected to the rotating tube 341 through a coupling, control cylinders 345 are installed on the positioning blocks 32 at the left and right ends of the positioning frame 31, and a control board 346 is installed on the control cylinder 345, and a control branch chain 347 is symmetrically provided on the control board 346 located at the right end of the positioning frame 31, and the control branch chain 347 is located in the rotating tube 341.

[0041] According to the specifications of the substrate, the control cylinder 345 is started to drive the control branch chain 347 to select the corresponding transmission pulley 342 to put it in working state. When the adjustment transmission unit 2 starts to drive the substrate to move, the transmission motor 344 is started synchronously. The transmission motor 344 controls the rotating tube 341 to rotate during operation. The rotating tube 341 drives the conveyor belt 343 to rotate in a circle through the transmission pulley 342 during movement. The conveyor belt 343 synchronously drives the substrate to move on the positioning block 32 during movement. The conveyor belt 343 is made of rubber and its upper end is located at the upper side of the positioning block 32 to ensure that the conveyor belt 343 can smoothly drive the substrate to move during movement.

[0042] The control branch chain 347 includes a control rod 3471 arranged on the control plate 346, and the control rod 3471 is located in the rotating tube 341. A clamping assembly is provided on the rotating tube 341 between the two positioning blocks 32. The control rod 3471 is used to control the operation of the clamping assembly. The control rod 3471 is connected to a driving block 3472, and the diameter of the driving block 3472 decreases from the middle to both sides.

[0043] When transporting substrates of different widths, the control cylinder 345 is started to drive the control plate 346 to adjust. During the movement, the control plate 346 drives the control rod 3471 to adjust the position in the rotating tube 341. During the movement, the control rod 3471 drives the driving block 3472 to squeeze the clamping assembly, so that the clamping assembly at the corresponding position is in a working state, thereby limiting the transmission pulley 342, ensuring that the rotating tube 341 can drive the corresponding transmission pulley 342 to rotate synchronously during the movement, so that the conveyor belt 343 can smoothly circulate and rotate, ensuring that the conveyor belt 343 can smoothly drive the substrate to move.

[0044] The clamping assembly includes clamping grooves evenly opened on the rotating tube 341, a clamping block 3473 is arranged in the clamping groove, a reset spring 3474 is arranged between the clamping block 3473 and the rotating tube 341, and a through-slot corresponding to the clamping block 3473 is opened on the inner wall of the transmission pulley 342.

[0045] By adopting the above technical solution, during the specific working process, the clamping block 3473 is squeezed by the driving block 3472, and the squeezed clamping block 3473 passes through the clamping groove and is inserted into the through slot, ensuring that the corresponding transmission pulley 342 can rotate synchronously during the rotation of the rotating tube 341.

[0046] In order to ensure the smooth progress of the substrate position adjustment operation and to ensure that the movement of the substrate will not be interfered with during the operation, the following design is made: the positioning support plate 368, the positioning block 32 and the front and rear sides of the positioning support plate 368 are all provided with rectangular grooves, and the control execution frame 369 is symmetrically arranged on the control plate 346, and the control execution frame 369 is slidably set in the rectangular groove.

[0047] When the control board 346 drives the control rod 3471 to adjust the working state during movement, the control execution frame 369 moves synchronously with the control board 346. The control execution frame 369 changes the contact position with the positioning support plate 368 during the movement. The control execution frame 369 has a stepped structure. When the corresponding transmission pulley 342 is selected, the positioning support plate 368 with a width smaller than the substrate is squeezed through the control execution frame 369 to ensure that it does not interfere with the movement of the substrate, thereby ensuring the smooth movement of the substrate and ensuring that the substrate movement position is in a specified state.

[0048] A groove in an Ω-shaped structure is formed in the middle of the positioning block 32 , and a rectangular groove communicating with the groove is formed on the positioning frame 31 .

[0049] The guide and alignment mechanism 36 includes a bidirectional motor 362 installed inside the positioning frame 31 through a motor seat, and a positioning screw 363 is symmetrically arranged on the output shaft of the bidirectional motor 362. The positioning screw 363 is connected to the inner wall of the positioning frame 31 through a bearing, and a support spring rod 364 is provided on the inner wall of the groove of each positioning block 32, and a guide frame 365 is provided on the support spring rod 364. A moving block 366 is provided on the positioning screw 363, and a lifting spring rod 367 is provided on the moving block 366. A positioning support plate 368 is installed on the lifting spring rod 367, and the positioning support plate 368 is connected to the positioning guide frame 365.

[0050] By adopting the above technical solution, during the actual working process, the bidirectional motor 362 is started according to the specifications of the substrate to drive the positioning screw 363 to rotate. During the rotation, the positioning screw 363 drives the moving block 366 to adjust the position displacement. During the movement, the moving block 366 drives the positioning guide frame 365 to adjust the position in the opposite direction through the positioning support plate 368. The position of the moving substrate is adjusted through the mutual cooperation between the two positioning guide frames 365, so that the substrate can be moved in the specified direction.

[0051] The positioning mechanism 35 includes positioning circular holes evenly arranged on the positioning plate 33, a positioning cylinder 351 is installed on the positioning frame 31, a positioning support plate 352 is installed on the positioning cylinder 351, positioning rods 353 are evenly arranged on the positioning support plate 352, and a positioning suction cup 354 is arranged on the positioning rod 353, and the positioning suction cup 354 is located in the positioning circular hole.

[0052] When the substrate moves to the position for laser head welding processing, the positioning cylinder 351 is started to drive the positioning support plate 352 to move upward, so that the positioning suction cup 354 contacts the ground of the substrate. The positioning suction cup 354 is connected to an external air pump. When the positioning suction cup 354 contacts the substrate, the air pump is started. During operation, the air pump fixes the lower end surface of the substrate through the positioning suction cup 354, and then the positioning cylinder 351 works to drive the positioning support plate 352 to move downward, so that the lower end surface of the substrate is attached to the positioning plate 33, thereby ensuring the stability of the Mini / micro LED on the substrate during the laser welding operation, ensuring that the substrate will not have movement deviations, thereby improving the accuracy of the Mini / micro LED laser welding process.

[0053] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A transmission device for Mini / micro LED laser welding equipment, comprising a fixed base (1), characterized in that: An adjustment transmission unit (2) is provided on the fixed base (1), and a positioning unit (3) is installed in the middle of the fixed base (1); The adjustment transmission unit (2) comprises a fixing frame (21) mounted on the fixing base (1); a dual-axis motor (22) is mounted inside the fixing frame (21) via a motor seat; adjustment mechanisms (23) are symmetrically arranged at both ends of the dual-axis motor (22); and a conveying mechanism (24) is arranged on the adjustment mechanism (23); The adjusting mechanism (23) includes a screw rod (231) connected to the output end of the dual-axis motor (22) through a coupling, the screw rod (231) is connected to a fixed plate (232) through a bearing, the fixed plate (232) is mounted on the fixed base (1), the fixed base (1) is symmetrically provided with a limit slider (233) in the front and rear, and a conveying base plate (234) is provided on the limit slider (233) in a sliding fit manner, a threaded hole is provided in the middle of the conveying base plate (234), and the screw rod (231) is connected to the threaded hole in a threaded engagement manner; and the conveying base plate (234) is U-shaped, and the conveying mechanism (24) is symmetrically provided on the front and rear sides of the side wall of the conveying base plate (234); The positioning unit (3) includes a positioning frame (31) on the fixed base (1), two positioning blocks (32) are symmetrically arranged on each side of the positioning frame (31), a positioning plate (33) is arranged between the two positioning blocks (32) in the middle of the positioning frame (31), a transmission mechanism (34) is arranged on the side of each positioning block (32) close to the positioning plate (33), and a positioning mechanism (35) is arranged in the middle of the positioning frame (31), and a guide alignment mechanism (36) is arranged in the positioning frame (31); A groove with an Ω-shaped structure is provided in the middle of the positioning block (32), and a rectangular groove communicating with the groove is provided on the positioning frame (31); The transmission mechanism (34) includes mounting grooves symmetrically provided on the front and rear sides of the positioning block (32); a rotating tube (341) is installed in the mounting groove located on the same central axis through a bearing; a transmission pulley (342) is provided on the outer wall of the rotating tube (341) located between two adjacent positioning blocks (32) through a bearing; the transmission pulley (342) is connected to the positioning block (32) in a sliding manner; the two corresponding transmission pulleys (342) are connected through a conveyor belt (343); a transmission motor (344) is installed on the positioning block (32) at the left end of the mounting frame through a motor seat The output shaft of the transmission motor (344) is connected to the rotating tube (341) through a coupling. The positioning blocks (32) located at the left and right ends of the positioning frame (31) are equipped with control cylinders (345). The control cylinders (345) are equipped with a control board (346). The control board (346) located at the right end of the positioning frame (31) is symmetrically provided with control branches (347). The control branches (347) are located in the rotating tube (341). According to the specifications of the LED substrate, the control branches (347) select the corresponding transmission pulley (342) to put it into working state. The guide alignment mechanism (36) includes a bidirectional motor (362) installed inside the positioning frame (31) through a motor seat, a positioning screw (363) is symmetrically arranged on the output shaft of the bidirectional motor (362), the positioning screw (363) is connected to the inner wall of the positioning frame (31) through a bearing, a support spring rod (364) is arranged on the inner wall of the groove of each positioning block (32), a guide frame (365) is arranged on the support spring rod (364), a moving block (366) is arranged on the positioning screw (363), a lifting spring rod (367) is arranged on the moving block (366), a positioning support plate (368) is installed on the lifting spring rod (367), and the positioning support plate (368) is connected to the guide frame (365); The positioning support plate (368), the positioning block (32) and the front and rear sides of the positioning support plate (368) are all provided with rectangular grooves, and the control execution frame (369) is symmetrically provided on the control plate (346). The control execution frame (369) is slidably provided in the rectangular grooves. The control execution frame (369) is a stepped structure, and the positioning support plate (368) having a width smaller than that of the LED substrate is squeezed by the control execution frame (369); The positioning mechanism (35) includes positioning circular holes evenly arranged on the positioning plate (33); a positioning cylinder (351) is installed on the positioning frame (31); a positioning support plate (352) is installed on the positioning cylinder (351); positioning rods (353) are evenly arranged on the positioning support plate (352); a positioning sucker (354) is arranged on the positioning rod (353); and the positioning sucker (354) is located in the positioning circular hole.

2. A transmission device for Mini / micro LED laser welding equipment according to claim 1, characterized in that: The conveying mechanism (24) comprises a sprocket (241) mounted on the conveying base plate (234) via a bearing, wherein the sprockets (241) are two in number and are arranged in parallel on the conveying base plate (234) in a front-to-back manner, and the two sprockets (241) are connected via a chain (242). A conveying motor (243) is mounted on the conveying base plate (234) via a motor seat, and an output shaft of the conveying motor (243) is connected to the sprocket (241).

3. A transmission device for Mini / micro LED laser welding equipment according to claim 1, characterized in that: The control branch chain (347) includes a control rod (3471) arranged on the control plate (346), the control rod (3471) is located in the rotating tube (341), and a clamping assembly is provided on the rotating tube (341) between the two positioning blocks (32). The control rod (3471) is used to control the operation of the clamping assembly. The control rod (3471) is connected to a driving block (3472), and the diameter of the driving block (3472) decreases from the middle to both sides.

4. A transmission device for Mini / micro LED laser welding equipment according to claim 3, characterized in that: The clamping assembly includes clamping grooves evenly arranged on the rotating tube (341), a clamping block (3473) is arranged in the clamping groove, a return spring (3474) is arranged between the clamping block (3473) and the rotating tube (341), and a through-slot corresponding to the clamping block (3473) is arranged on the inner wall of the transmission pulley (342).

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