Micro LED mass welding optical jig

Abstract

The invention relates to the technical field of laser welding, in particular to a Micro LED mass welding optical jig which comprises a fixing support, and an optical fiber shell is installed at the upper end of the front side face of the fixing support. The light source adjusting assembly is installed in the middle of the front side face of the fixing support, a laser beam generated by the laser optical fiber penetrates through the middle of the light source adjusting assembly, and the light source adjusting assembly is used for accurately adjusting the beam generated by the laser optical fiber on the micrometer level or even the nanometer level; the lens assembly is installed at the lower end of the front side face of the fixing support. The center of the lens assembly and the light source adjusting assembly are located on the same axis. The vertical adjusting unit is used for adjusting the height and the inclination angle of the optical element, so that movement in the horizontal direction, movement in the vertical direction and adjustment of the pitching angle can be easily achieved through the light source adjusting assembly, the multi-dimensional adjusting capacity enables the optical element to meet the requirement for complex light path layout, and the optical element can meet the requirement for complex light path layout. And subsequent welding of the Micro LED is facilitated.

Description

Technical Field

[0001] The present application relates to the field of laser welding technology, and in particular to a Micro LED mass welding optical fixture. Background Art

[0002] Micro LED mass welding optical fixture is a special tool for welding Micro LED chips and substrates. It combines high-precision micron-level motion control, optical recognition and computing technology, and a fully closed-loop precision temperature control system to achieve high-degree-of-freedom and precise control of various process detail parameters during the welding process.

[0003] The Chinese patent with publication number CN111983764A and titled "A Cage-type Five-axis Optical Adjustment Frame" specifically includes two hand-tightened threaded pairs with self-locking nuts and one non-hand-tightened threaded pair with self-locking nuts. The two hand-tightened threaded pairs with self-locking nuts are used to adjust the angle between the lens and the optical axis, and the non-hand-tightened threaded pair with self-locking nuts is used to adjust the distance between the lens and the intersection of the two optical axes. Two dividing heads are used to realize the horizontal and vertical movement of the adjustment frame sliding block, thereby driving the movement of the lens to realize the adjustment of the horizontal and vertical positions of the lens.

[0004] The above-mentioned existing technology can also realize the function of adjusting the light source when in use. However, when adjusting the light source, the above-mentioned existing technology only adopts a manual twisting design method, and the adjustment effect is poor and the adjustment is inaccurate. It is not possible to accurately perform multi-dimensional rapid adjustment of the optical elements. The horizontal and vertical movement of the optical elements and the adjustment of the pitch angle are relatively cumbersome, and cannot meet the needs of complex optical path layout. Based on this, there is still room for improvement on the basis of the existing Micro LED mass welding optical fixture. Summary of the invention

[0005] In order to accurately realize the horizontal and vertical movement of optical elements and the rapid and accurate adjustment of the pitch angle, and ensure the subsequent accurate welding of Micro LED, the present application provides a Micro LED mass welding optical fixture.

[0006] The present application provides a Micro LED mass welding optical fixture that adopts the following technical solutions:

[0007] A Micro LED mass welding optical fixture includes a fixed bracket and an optical fiber shell, which is installed at the upper end of the front side of the fixed bracket, and the laser optical fiber passes through the inside of the optical fiber shell; a light source adjustment component, which is installed in the middle of the front side of the fixed bracket, and the laser light beam generated by the laser optical fiber passes through the middle of the light source adjustment component, and the light source adjustment component is used to accurately adjust the light beam generated by the laser optical fiber at the micron or even nanometer level; a lens component, which is installed at the lower end of the front side of the fixed bracket, and the center of the lens component and the light source adjustment component are on the same axis; a connecting bracket, which is installed on the side wall of the fixed bracket.

[0008] The light source adjustment assembly includes an adjustment bracket, a cover, an L-shaped bracket, a vertical adjustment unit, a fixing bracket, an optical element and a horizontal adjustment unit. The adjustment bracket is installed on the fixing bracket by screws. The adjustment bracket is a rectangular hollow structure. The lower end of the adjustment bracket is threadedly installed with a cover, the upper end of the adjustment bracket is installed with an L-shaped bracket, three mounting holes are provided on the L-shaped bracket, and the vertical adjustment unit is installed in the mounting holes. A fixing bracket is provided inside the adjustment bracket, the upper end of the fixing bracket is connected to the vertical adjustment unit, the optical element is installed in the middle of the fixing bracket, and the outer side of the adjustment bracket is also provided with horizontal adjustment units arranged horizontally and vertically.

[0009] Furthermore, the vertical adjustment unit includes a descending mechanism, an air pressure regulating mechanism, a connecting plate, a conduit and an angle adjustment mechanism. The upper end of the adjustment bracket is provided with a through hole corresponding to the mounting hole, the descending mechanism is installed in the through hole, the lower end of the descending mechanism is connected to the connecting plate, the connecting plate is installed at the lower end of the fixed frame, the air pressure regulating mechanism is installed in the mounting hole, the lower end of the air pressure regulating mechanism is installed in the middle of the descending mechanism, the angle adjustment mechanism is installed on the inner side of the connecting plate, and a conduit is installed between the lower end of the angle adjustment mechanism and the air pressure regulating mechanism.

[0010] Furthermore, the descending mechanism includes a fixed sleeve, a piston sleeve and a connecting spring. The fixed sleeve is installed in the through hole, and a piston sleeve is movably arranged in the middle of the fixed sleeve. The piston sleeve is a hollow structure, a connecting spring is arranged on the outside of the piston sleeve, and a cavity is arranged between the outside of the piston sleeve and the fixed sleeve.

[0011] Furthermore, the air pressure regulating mechanism includes a connecting sleeve, an adjusting rod, an air guide pipe, a sealing plate and an extrusion rod. The mounting hole is installed with a connecting sleeve, an adjusting rod is slidably arranged inside the connecting sleeve, the lower end of the adjusting rod is a hollow structure, the air guide pipe is fixedly installed inside the piston sleeve, the upper end of the air guide pipe is located inside the lower end of the adjusting rod, a limiting groove is arranged inside the adjusting rod, the upper end of the air guide pipe is slidably arranged in the limiting groove, a sealing plate is installed in the middle of the adjusting rod, a cavity 2 is arranged between the upper end of the sealing plate and the adjusting rod, a sealing plug is movably arranged in the middle of the sealing plate, an extrusion rod is movably arranged on the sealing plate, and the extrusion rod is connected to the sealing plug.

[0012] Furthermore, the limiting groove includes a horizontal section and a vertical section, the horizontal section and the vertical section are smoothly connected, a return spring is installed in the horizontal section, and the end of the return spring is connected to the slider.

[0013] Furthermore, the angle adjustment mechanism includes a sealing sleeve, a piston plate, a push rod and an annular plate. A circular hole is provided on the connecting plate, a sealing sleeve is installed in the circular hole, a piston plate is movably provided inside the sealing sleeve, a cavity three is provided between the lower end of the piston plate and the sealing sleeve, cavity three is connected to the lower end of the air guide tube, a push rod is installed on the upper end of the piston plate, an annular plate is provided between the upper ends of the push rod, and the push rod and the annular plate are connected by a universal ball.

[0014] Furthermore, the annular plate is evenly provided with plug holes, the outer end of the optical element is provided with a plug rod that matches the plug hole, the optical element is moved laterally or longitudinally on a horizontal plane through the plug rod, and a telescopic spring is provided on the plug rod.

[0015] Furthermore, the horizontal adjustment unit includes a connecting seat, an adjusting knob, an adjusting frame and a guide rod. The connecting seat is installed on the adjusting frame. The adjusting knob is connected to the inside of the connecting seat by threaded fitting. The adjusting frame is installed on the inner side of the adjusting knob through a bearing. The adjusting frame is located inside the adjusting frame. A guide rod is slidably arranged on the inner side of the adjusting frame. A guide hole that cooperates with the guide rod is arranged on the fixed frame. The end of the guide rod is made of flexible material.

[0016] In the above technical scheme, the present invention provides a Micro LED mass welding optical fixture, in which three groups of vertical adjustment units are arranged, and the three groups of vertical adjustment units are used to adjust the height and tilt angle of the optical element. When the height of the optical element is adjusted, the three vertical adjustment units are adjusted synchronously, so that the vertical adjustment unit can drive the optical element to move up and down to achieve the function of adjusting the height of the optical element. When the inclination angle of the optical element needs to be adjusted, only a single vertical adjustment unit needs to be adjusted, and the function of adjusting the inclination angle of the optical element is achieved by tilting one side of the optical element. The horizontal and vertical positions of the optical element can be adjusted through the horizontal adjustment unit, and then whether it is horizontal or vertical movement or adjustment of the pitch angle, it can be easily achieved through the light source adjustment component. This multi-dimensional adjustment capability enables the optical element to meet the requirements of complex optical path layout, which is beneficial to the subsequent welding of Micro LED. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the light source adjustment component of the present invention.

[0020] Figure 3 It is a first cross-sectional structural schematic diagram of the light source adjustment assembly of the present invention.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure between the L-shaped bracket and the air pressure regulating mechanism of the present invention.

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the air pressure regulating mechanism of the present invention.

[0023] Figure 6 It is a second cross-sectional structural schematic diagram of the light source adjustment assembly of the present invention.

[0024] Figure 7 The present invention Figure 6 Schematic diagram of the enlarged structure at X in the middle.

[0025] Explanation of the reference numerals: 1. fixing bracket; 2. optical fiber housing; 3. light source adjustment assembly; 31. adjustment bracket; 32. sealing cover; 33. L-shaped bracket; 34. vertical adjustment unit; 341. descending mechanism; 342. air pressure adjustment mechanism; 3421. connecting sleeve; 3422. adjusting rod; 3423. air guide tube; 3424. sealing plate; 3425. extrusion rod; 3426. limiting groove; 343. connecting plate; 344. guide tube; 345. angle adjustment mechanism; 3451. sealing sleeve; 3452. piston plate; 3453. ejector rod; 3454. annular plate; 35. fixing bracket; 36. optical element; 361. plug-in rod; 37. horizontal adjustment unit; 371. connecting seat; 372. adjusting knob; 373. adjusting bracket; 374. guide rod; 4. lens assembly; 5. connecting bracket. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] See also Figure 1-7A Micro LED mass welding optical fixture provided in an embodiment of the present invention includes a fixed bracket 1, and an optical fiber housing 2, which is installed at the upper end of the front side of the fixed bracket 1, and the laser optical fiber passes through the inside of the optical fiber housing 2; a light source adjustment component 3, which is installed in the middle of the front side of the fixed bracket 1, and the laser beam generated by the laser optical fiber passes through the middle of the light source adjustment component 3, and the light source adjustment component 3 is used to accurately adjust the beam generated by the laser optical fiber at the micron or even nanometer level; a lens component 4, which is installed at the lower end of the front side of the fixed bracket 1, and the center of the lens component 4 is on the same axis as the light source adjustment component 3; a connecting bracket 5, which is installed on the side wall of the fixed bracket 1.

[0028] See also Figure 2-Figure 4 As shown, the light source adjustment assembly 3 includes an adjustment bracket 31, a cover 32, an L-shaped bracket 33, a vertical adjustment unit 34, a fixing bracket 35, an optical element 36 and a horizontal adjustment unit 37. The adjustment bracket 31 is installed on the fixing bracket 1 by screws. The adjustment bracket 31 is a rectangular hollow structure. The lower end of the adjustment bracket 31 is threadedly installed with the cover 32, and the upper end of the adjustment bracket 31 is installed with the L-shaped bracket 33. The L-shaped bracket 33 is provided with three mounting holes, and the vertical adjustment unit 34 is installed in the mounting holes. A fixing bracket 35 is provided inside the adjustment bracket 31, and the upper end of the fixing bracket 35 is connected to the vertical adjustment unit 34. An optical element 36 is installed in the middle of the fixing bracket 35. The outer side of the adjustment bracket 31 is also provided with horizontal adjustment units 37 arranged horizontally and vertically.

[0029] In the above technical solution, the vertical adjustment unit 34 is used to adjust the height and tilt angle of the optical element 36. When the height of the optical element 36 is adjusted, multiple vertical adjustment units 34 are adjusted synchronously, so that the vertical adjustment unit 34 can drive the optical element 36 to move up and down to achieve the function of adjusting the height of the optical element 36. When the tilt angle of the optical element 36 needs to be adjusted, only a single vertical adjustment unit 34 needs to be adjusted. By tilting one side of the optical element 36, the function of adjusting the tilt angle of the optical element 36 is achieved. The horizontal and vertical positions of the optical element 36 can be adjusted through the horizontal adjustment unit 37, and then both horizontal and vertical movement and pitch angle adjustment can be easily achieved through the light source adjustment component 3. This multi-dimensional adjustment capability enables the optical element 36 to meet the needs of complex optical path layout, which is beneficial to the subsequent welding of Micro LED.

[0030] It should be noted that by precisely controlling the position and direction of the optical element, the optical path can be precisely laid out and optimized, thereby improving the performance of the optical system. In the optical experiment, the light source adjustment component 3 can be used to precisely adjust the position and angle of the laser to achieve the best beam output and ensure the accuracy of subsequent Micro LED welding.

[0031] See also Figure 3-Figure 6 As shown, as a preferred technical solution of this embodiment, the vertical adjustment unit 34 includes a descending mechanism 341, an air pressure regulating mechanism 342, a connecting plate 343, a conduit 344 and an angle adjustment mechanism 345. The upper end of the adjustment bracket 31 is provided with a through hole corresponding to the mounting hole, and the descending mechanism 341 is installed in the through hole. The lower end of the descending mechanism 341 is connected to the connecting plate 343, and the connecting plate 343 is installed at the lower end of the fixing frame 35. The air pressure regulating mechanism 342 is installed in the mounting hole, and the lower end of the air pressure regulating mechanism 342 is installed in the middle of the descending mechanism 341. The angle adjustment mechanism 345 is installed on the inner side of the connecting plate 343, and a conduit 344 is installed between the lower end of the angle adjustment mechanism 345 and the air pressure regulating mechanism 342.

[0032] In the above technical solution, when it is necessary to adjust the height of the optical element 36 in the vertical direction, the three descending mechanisms 341 move synchronously, thereby realizing the function of adjusting the optical element 36 as a whole up and down. When it is necessary to adjust the inclination angle of the optical element 36, an air pressure adjustment mechanism 342 is adjusted. The air pressure adjustment mechanism 342 drives an angle of the optical element 36 to rise or fall through the angle adjustment mechanism 345, thereby realizing the function of adjusting the inclination angle of the optical element 36.

[0033] See also Figure 6 As shown, as the preferred technical solution of this embodiment, the descending mechanism 341 includes a fixed sleeve 3411, a piston sleeve 3412 and a connecting spring 3413, the fixed sleeve 3411 is installed in the through hole, the piston sleeve 3412 is movably arranged in the middle of the fixed sleeve 3411, the piston sleeve 3412 is a hollow structure, the connecting spring 3413 is arranged on the outside of the piston sleeve 3412, and a cavity 1 is arranged between the outside of the piston sleeve 3412 and the fixed sleeve 3411.

[0034] In the above technical solution, an air pump is also provided inside the L-shaped bracket 33, and the air pump is connected to the inside of cavity 1. When the vertical height of the optical element 36 needs to be adjusted, the air pump ventilates or inhales air into the three cavities at the same time, so that the three piston sleeves 3412 rise or fall synchronously, so as to realize the function of adjusting the vertical height of the optical element 36.

[0035] It should be noted that a control button is provided on the L-shaped bracket 33, and the control button is connected to the air pump. The control button can be used to control the air pump to ventilate or inhale into the three cavities at the same time, so as to achieve the function of adjusting the optical element 36 as a whole up and down.

[0036] See also Figure 4-Figure 5As shown, as a preferred technical solution of this embodiment, the air pressure regulating mechanism 342 includes a connecting sleeve 3421, an adjusting rod 3422, an air guide tube 3423, a sealing plate 3424 and an extrusion rod 3425. The connecting sleeve 3421 is installed on the mounting hole, and the adjusting rod 3422 is slidably arranged inside the connecting sleeve 3421. The lower end of the adjusting rod 3422 is a hollow structure. The air guide tube 3423 is fixedly installed inside the piston sleeve 3412. The upper end of the air guide tube 3423 is located at A limiting groove 3426 is arranged inside the lower end of the adjusting rod 3422, and the upper end of the air guide tube 3423 is slidably arranged in the limiting groove 3426. A sealing plate 3424 is installed in the middle of the adjusting rod 3422, and a cavity 2 is arranged between the upper end of the sealing plate 3424 and the adjusting rod 3422. A sealing plug is movably arranged in the middle of the sealing plate 3424, and an extrusion rod 3425 is movably arranged on the sealing plate 3424, and the extrusion rod 3425 is connected to the sealing plug.

[0037] As a preferred technical solution of this embodiment, the limiting groove 3426 includes a horizontal section and a vertical section, the horizontal section and the vertical section are smoothly connected, a return spring is installed in the horizontal section, and the end of the return spring is connected to the slider.

[0038] In the above technical solution, when the inclination angle of the optical element 36 needs to be adjusted, the adjusting rod 3422 is manually rotated, and the adjusting rod 3422 drives the slider to slide inside the limit groove. When the slider rotates from the horizontal section to the vertical section, the slider can move along the vertical section. When the slider moves downward along the vertical section, the lower end of the extrusion rod 3425 is squeezed, and the extrusion rod 3425 drives the sealing plug to move upward, so that the sealing plug is separated from the sealing plate 3424, and then the lower end of the second cavity is connected with the angle adjustment mechanism 345 through the conduit 344. The inclination angle of the optical element 36 can be accurately adjusted by controlling the increase or decrease of the air pressure inside the second cavity.

[0039] It should be noted that the interior of cavity 2 is connected to an air pump. When the inclination angle of the optical element 36 needs to be increased, air is inflated into the interior of cavity 2 through the air pump, so that the angle adjustment mechanism 345 drives one end of the optical element 36 to rise, thereby achieving the purpose of increasing the inclination angle. Conversely, the inclination angle of the optical element 36 can be reduced.

[0040] See also Figure 6-Figure 7As shown, as the preferred technical solution of this embodiment, the angle adjustment mechanism 345 includes a sealing sleeve 3451, a piston plate 3452, a push rod 3453 and an annular plate 3454, a circular hole is provided on the connecting plate 343, a sealing sleeve 3451 is installed in the circular hole, a piston plate 3452 is movably provided inside the sealing sleeve 3451, a cavity three is provided between the lower end of the piston plate 3452 and the sealing sleeve 3451, the cavity three is connected with the lower end of the air guide tube 3423, a push rod 3453 is installed on the upper end of the piston plate 3452, an annular plate 3454 is provided between the upper ends of the push rod 3453, and the push rod 3453 and the annular plate 3454 are connected by a universal ball.

[0041] In the above technical solution, when cavity two is connected to cavity three, if the air pressure inside cavity two is greater than the air pressure inside cavity three, the piston plate 3452 moves upward, and the piston plate 3452 drives one side of the annular plate 3454 to tilt upward through the push rod 3453, thereby realizing the function of adjusting the inclination angle of the optical element 36.

[0042] See also Figure 7 As shown, as a preferred technical solution of this embodiment, the annular plate 3454 is evenly provided with plug-in holes, and the outer end of the optical element 36 is provided with a plug-in rod 361 that cooperates with the plug-in holes. The optical element 36 is moved laterally or longitudinally on a horizontal plane through the plug-in rod, and a telescopic spring is provided on the plug-in rod 361.

[0043] In the above technical solution, the optical element 36 in the middle of the annular plate 3454 is not fixed, but is slidably arranged inside the plug-in hole through the plug-in rod. When the optical element 36 is subjected to lateral or longitudinal force, the optical element 36 can move horizontally in the lateral or longitudinal direction, and the telescopic spring has a compression effect, so that the optical element 36 will not shake on the annular plate 3454.

[0044] See also Figure 7 As shown, as the preferred technical solution of this embodiment, the horizontal adjustment unit 37 includes a connecting seat 371, an adjusting knob 372, an adjusting frame 373 and a guide rod 374. The connecting seat 371 is installed on the adjustment bracket 31, and the adjusting knob 372 is connected to the inside of the connecting seat 371 by threaded fitting. The adjusting frame 373 is installed on the inner side of the adjusting knob 372 through a bearing. The adjusting frame 373 is located inside the adjustment bracket 31, and a guide rod 374 is slidably arranged on the inner side of the adjusting frame 373. A guide hole cooperating with the guide rod 374 is arranged on the fixed frame 35, and the end of the guide rod 374 is made of flexible material.

[0045] In the above technical solution, when the optical element 36 needs to be adjusted horizontally or vertically, the adjustment knob 372 is used to drive the adjustment frame 373 to feed inward, and the adjustment frame 373 can drive the optical element 36 to move horizontally or vertically through the guide rod 374, thereby meeting the needs of complex optical path layout.

[0046] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A Micro LED mass welding optical fixture, characterized in that: include: a fixing bracket (1), and An optical fiber housing (2) is mounted on the upper end of the front side of the fixed bracket (1), and the laser optical fiber passes through the interior of the optical fiber housing (2); A light source adjustment component (3) is mounted on the middle of the front side of the fixed bracket (1), and the laser light beam generated by the laser optical fiber passes through the middle of the light source adjustment component (3). The light source adjustment component (3) is used to accurately adjust the light beam generated by the laser optical fiber at the micrometer or even nanometer level; A lens assembly (4) is mounted on the lower end of the front side of the fixed bracket (1), and the center of the lens assembly (4) and the light source adjustment assembly (3) are on the same axis; A connecting bracket (5) mounted on a side wall of the fixing bracket (1); The light source adjustment assembly (3) comprises an adjustment bracket (31), a cover (32), an L-shaped bracket (33), a vertical adjustment unit (34), a fixing bracket (35), an optical element (36) and a horizontal adjustment unit (37); the adjustment bracket (31) is mounted on the fixing bracket (1) by means of screws; the adjustment bracket (31) is a rectangular hollow structure; the lower end of the adjustment bracket (31) is mounted with a cover (32) by means of threads; the upper end of the adjustment bracket (31) is mounted with an L-shaped bracket (33); three mounting holes are arranged on the L-shaped bracket (33); the vertical adjustment unit (34) is mounted in the mounting holes; a fixing bracket (35) is arranged inside the adjustment bracket (31); the upper end of the fixing bracket (35) is connected to the vertical adjustment unit (34); the middle part of the fixing bracket (35) is mounted with an optical element (36); and the outer side surface of the adjustment bracket (31) is also provided with horizontal adjustment units (37) arranged transversely and longitudinally.

2. The Micro LED mass welding optical fixture according to claim 1, characterized in that: The vertical adjustment unit (34) comprises a descending mechanism (341), an air pressure regulating mechanism (342), a connecting plate (343), a conduit (344) and an angle adjusting mechanism (345); a through hole corresponding to the mounting hole is provided at the upper end of the adjustment bracket (31); the descending mechanism (341) is installed in the through hole; the lower end of the descending mechanism (341) is connected to the connecting plate (343); the connecting plate (343) is installed at the lower end of the fixing bracket (35); the air pressure regulating mechanism (342) is installed in the mounting hole; the lower end of the air pressure regulating mechanism (342) is installed in the middle of the descending mechanism (341); the angle adjusting mechanism (345) is installed on the inner side of the connecting plate (343); and the conduit (344) is installed between the lower end of the angle adjusting mechanism (345) and the air pressure regulating mechanism (342).

3. The Micro LED mass welding optical fixture according to claim 2, characterized in that: The descending mechanism (341) comprises a fixed sleeve (3411), a piston sleeve (3412) and a connecting spring (3413); the fixed sleeve (3411) is installed in the through hole; the piston sleeve (3412) is movably arranged in the middle of the fixed sleeve (3411); the piston sleeve (3412) is a hollow structure; the connecting spring (3413) is arranged on the outside of the piston sleeve (3412); and a cavity 1 is arranged between the outside of the piston sleeve (3412) and the fixed sleeve (3411).

4. The Micro LED mass welding optical fixture according to claim 3, characterized in that: The air pressure regulating mechanism (342) comprises a connecting sleeve (3421), an adjusting rod (3422), an air guide tube (3423), a sealing plate (3424) and an extrusion rod (3425); the connecting sleeve (3421) is installed on the installation hole; the adjusting rod (3422) is slidably arranged inside the connecting sleeve (3421); the lower end of the adjusting rod (3422) is a hollow structure; the air guide tube (3423) is fixedly installed inside the piston sleeve (3412); the upper end of the air guide tube (3423) is located on the adjusting rod (3424). 2) Inside the lower end, a limiting groove (3426) is arranged inside the adjusting rod (3422), the upper end of the air guide tube (3423) is slidably arranged in the limiting groove (3426), a sealing plate (3424) is installed in the middle of the adjusting rod (3422), a cavity 2 is arranged between the upper end of the sealing plate (3424) and the adjusting rod (3422), a sealing plug is movably arranged in the middle of the sealing plate (3424), an extrusion rod (3425) is movably arranged on the sealing plate (3424), and the extrusion rod (3425) is connected to the sealing plug.

5. The Micro LED mass welding optical fixture according to claim 4, characterized in that: The limiting groove (3426) comprises a horizontal section and a vertical section, the horizontal section and the vertical section are smoothly connected, a return spring is installed in the horizontal section, and the end of the return spring is connected to the sliding block.

6. The Micro LED mass welding optical fixture according to claim 5, characterized in that: The angle adjustment mechanism (345) comprises a sealing sleeve (3451), a piston plate (3452), a push rod (3453) and an annular plate (3454); a circular hole is arranged on the connecting plate (343); a sealing sleeve (3451) is installed in the circular hole; a piston plate (3452) is movably arranged inside the sealing sleeve (3451); a cavity three is arranged between the lower end of the piston plate (3452) and the sealing sleeve (3451); the cavity three is connected to the lower end of the air guide tube (3423); a push rod (3453) is installed on the upper end of the piston plate (3452); an annular plate (3454) is arranged between the upper ends of the push rod (3453); and the push rod (3453) and the annular plate (3454) are connected via a universal ball.

7. The Micro LED mass welding optical fixture according to claim 6, characterized in that: The annular plate (3454) is evenly provided with plug holes, and the outer end of the optical element (36) is provided with a plug rod (361) that matches the plug hole. The optical element (36) moves laterally or longitudinally on a horizontal plane through the plug rod (361), and a telescopic spring is provided on the plug rod (361).

8. The Micro LED mass welding optical fixture according to claim 7, characterized in that: The horizontal adjustment unit (37) comprises a connecting seat (371), an adjusting knob (372), an adjusting frame (373) and a guide rod (374); the adjusting frame (31) is installed on the adjusting frame (31); the adjusting knob (372) is connected to the inside of the connecting seat (31) by threaded engagement; the adjusting frame (373) is installed inside the adjusting knob (372) by a bearing; the adjusting frame (373) is located inside the adjusting frame (31); the guiding rod (374) is slidably arranged inside the adjusting frame (373); a guiding hole cooperating with the guiding rod (374) is arranged on the fixing frame (35); and the end of the guiding rod (374) is made of a flexible material.

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