Automated Assembly and Adjustment Mechanism, Method and Application of Laser Alignment Instrument

Abstract

The present invention discloses an automatic assembly and adjustment mechanism, method and application for a laser alignment instrument, belonging to the field of laser alignment instruments. By improving the existing laser module structure and assembly and adjustment process, the present invention cancels the assembly and adjustment method of traditional calibration screws, and adopts a new type of laser module and a universal adjustment structure composed of a spherical ring and a threaded compression ring cooperating therewith, realizing automatic assembly and adjustment with higher precision and more directions. The present invention uses the spherical ring and the threaded compression ring for universal fine adjustment and fixing of the laser module and the method of directly assembling and adjusting the cylindrical lens, and still meets the precision index after verification of high and low temperature reliability and vibration reliability, so that the assembled pendulum body does not need to be calibrated again after being assembled on the base, simplifies the original structure and assembly and adjustment process, and can realize automatic assembly and adjustment, with fast and simple operation, reliable precision, greatly improving the production efficiency of the laser module section and the whole machine section, reducing the production cost, and laying a technical foundation for the subsequent realization of automatic mass production of laser alignment instruments.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser alignment instruments, and particularly relates to an automatic assembly and adjustment mechanism, method and application of a laser alignment instrument. Background Art

[0002] As a measuring instrument, a laser alignment instrument is widely used in engineering surveying and interior decoration to provide horizontal and plumb references, and is a high-precision optoelectronic instrument. The laser alignment instrument includes a base, a column and a suspension mechanism. The suspension mechanism includes a cross and a pendulum body. A laser installation hole is provided on the pendulum body, and a laser module is installed in the laser installation hole.

[0003] Currently, the most important link in the production process of a laser alignment instrument is the laser line calibration work. The calibration work is manually operated. According to the different positions and functions of each laser module, observe the position of the laser line on the targets in each direction, and adjust the laser module through multiple screws on the pendulum body to make the emitted laser line meet the required indicators. Due to the inherent structures of the pendulum body and the laser module of the laser alignment instrument, the debugging process requires two processes: first, according to the position of the laser module assembled on the pendulum body, initially adjust the optical axis index of each laser module by adjusting the screws on the pendulum body, and determine an optical axis according to the mechanical rotation axis of the pendulum body; after inspections such as high temperature and vibration, the screws become loose and offset, and there is a stress release situation. After the offset, the adjusted accuracy cannot be restored. Therefore, after the pendulum body is assembled on the base and the counterweight calibration is carried out, according to the mechanical rotation axis of the whole machine, the screws are adjusted again for each laser module to obtain the optical axis indexes based on the individual and the whole. Since the laser alignment instrument is a precision instrument with strict index requirements, the above calibration work is very cumbersome and complex, resulting in a high calibration cost in the industry for laser alignment instruments, and it is also difficult to achieve automated mass production. Summary of the Invention

[0004] In order to solve the problems of the complex structure of the traditional laser alignment instrument, the complex assembly and laser line calibration processes, etc., the present invention provides an automatic assembly and adjustment mechanism for a laser alignment instrument. By designing the structure of the laser module and the universal adjustment structure that cooperates with it, the required indicators of the laser line can be achieved with one calibration. After the pendulum body is installed on the alignment instrument base, there is no need for re-calibration, which simplifies the original structure and assembly and adjustment processes. And this assembly and adjustment mechanism realizes automatic assembly and adjustment, cancels the traditional screw calibration method, is fast and simple to operate, has reliable accuracy, greatly improves the production efficiency of the laser module section and the whole laser alignment instrument, reduces the production cost of the laser alignment instrument, and lays a technical foundation for the subsequent realization of automated mass production of laser alignment instruments.

[0005] The technical solution of the present invention is as follows:

[0006] On the one hand, the present invention provides an automatic assembly and adjustment mechanism for a laser alignment instrument, including a pendulum body, a laser module, a spherical ring and a threaded compression ring;

[0007] A plurality of laser module mounting holes are provided on the pendulum body. The laser module mounting holes are stepped holes composed of a first step and a second step, and the outer hole diameter is larger than the inner hole diameter. The first step is located inside the second step, and an arc chamfer is provided at the first step;

[0008] The laser module is a rotating body structure composed of a light source section and a laser output section. Among them, the outer surface of the light source section is an arc surface, the bottom surface of the light source section is a plane perpendicular to the central axis of the laser module, and the outer surface of the laser output section is a cylindrical surface;

[0009] The inner wall of the spherical ring is provided with an arc surface matching the arc surface of the laser module;

[0010] The threaded compression ring is provided with an external thread. The lower end of the threaded compression ring presses the arc surface of the laser module against the first step through the spherical ring, so that the laser module, the spherical ring and the threaded compression ring form a tightly matched universal adjustment mechanism as a whole, and there is a gap between the threaded compression ring and the cylindrical surface of the laser module, thereby realizing universal adjustment.

[0011] Furthermore, the laser module includes a housing, a light source, a lens group, a pressure cylinder and a cylindrical lens; the housing is a housing structure with a through hole in the center. Among them, the end of the housing is an arc-shaped outer surface, and the light source is installed in its inner cavity; the front end of the housing is a cylindrical outer surface, and it is a stepped hole inside with the outer hole diameter larger than the inner hole diameter; a through hole for laser emission is provided in the center of the pressure cylinder, and the pressure cylinder is installed in the outer hole at the front end of the housing and fixes the lens group in the inner hole; the cylindrical lens is installed on the pressure cylinder.

[0012] Furthermore, the arc chamfer, the arc surface on the inner wall of the spherical ring and the arc surface at the end of the laser module housing are concentric; the vertical distance between the center of the arc surface at the end of the housing and the bottom surface of the end of the housing is greater than mm, ; among them, is the radius of the arc surface, ; is the maximum angle that the laser module can be adjusted in any direction, ≥3.5°; is the angle between the connection line between the center of the circle and the upper end of the arc chamfer and the central axis of the housing; is the outer diameter of the cylindrical front end of the housing; is the vertical distance between the upper end face of the threaded compression ring and the center of the circle; is the embedding amount of the arc-shaped outer surface at the end of the housing into the inner wall of the threaded compression ring, ≥0.5mm.

[0013] Further, after being adjusted, the cylindrical lens is connected to the outer end face of the pressing cylinder by gluing.

[0014] Further, the cylindrical lens is mounted on the pressing cylinder by means of cooperation between a base and a slider; the base is a cylindrical structure with a through hole in the center, which is mounted above the pressing cylinder and fixed on the housing. The through hole on the base is concentric with the through hole on the pressing cylinder. An arc-shaped surface is provided in the middle of the upper surface of the base; the slider is a cylindrical structure with a hole in the center. A protrusion matching the chute of the base is provided at the bottom of the slider, and a mounting groove for mounting the cylindrical lens is provided at the top of the slider. The cylindrical lens is adjusted by sliding the slider in the chute of the base, and after adjustment, it is fixed by dispensing glue.

[0015] Further, the cylindrical lens is mounted on the pressing cylinder by means of a mounting seat; the mounting seat is a cylindrical structure, and a mounting hole is provided at the bottom thereof. It is mounted above the pressing cylinder through the mounting hole and fixed on the housing. A through hole for laser emission and a groove for mounting the cylindrical lens are provided at the center of the top surface of the mounting seat. A plurality of screws are provided outside the through hole for adjusting the cylindrical lens.

[0016] Further, the lens group includes a plano-convex lens, a spacer, and a plano-concave lens arranged in sequence from front to back; an anti-reflection thread is provided on the inner wall of the housing between the lens group and the light source.

[0017] Further, the pressing cylinder is mounted at the front end of the housing by means of interference fit or threaded fit; the light source is mounted at the rear end of the housing by means of interference fit or threaded fit.

[0018] In a second aspect of the present invention, a method for assembling and adjusting the above-mentioned laser marking instrument automatic assembling and adjusting mechanism is provided, including the following steps:

[0019] S1. First, the lens group is inserted into the front end of the housing and fixed by the pressing cylinder; then the light source is pressed into the rear end of the housing. During the pressing process, check the size of the focusing spot, and slowly push the light source until the required index is reached to complete the installation.

[0020] S2. Place the assembled laser module into the laser module mounting hole on the pendulum body; insert the spherical ring so that the arc surface of the laser module is closely attached to the inner wall of the spherical ring; then rotate and screw in the threaded pressing ring, and press the arc surface of the laser module against the first step through the spherical ring, so that the laser module, the spherical ring, and the threaded pressing ring form a tightly matched universal adjustment mechanism as a whole.

[0021] S3. Use the manipulator to grasp the protruding pendulum body part of the laser module, turn on the light source and swing the laser module in all directions, and adjust it until the beam emitted by the laser module is concentric with the center of the laser module mounting hole; after the concentricity adjustment is completed, apply glue to fix the laser module.

[0022] S4. After the concentricity adjustment of all laser module mounting holes is completed, place the cylindrical lens on the pressure cylinder of the laser module with the light source turned on, and adjust the cylindrical lens to the appropriate position by detecting the spot position and then apply glue to fix it.

[0023] The third aspect of the present invention also provides a laser alignment instrument, and the laser alignment instrument includes the above-mentioned automatic assembly and adjustment mechanism for the laser alignment instrument.

[0024] Advantages of the present invention:

[0025] 1) The present invention improves the structure of the laser module. The collimating lens assembly and the light source are respectively installed at both ends of the housing by two-way assembly. The one-way depth is relatively shallow, and there is more space for directly assembling the collimating lens assembly at the front end, so the assembly accuracy is significantly enhanced, which is convenient for realizing precise automatic assembly and adjustment of the optical lens; and the pressure cylinder can also be used as the support frame for the cylindrical lens at the same time, making the relative parallelism between the support end face of the cylindrical lens and the double lens better. At the same time, the traditional method of adjusting the cylindrical lens with screws is cancelled, and automatic assembly and adjustment can be realized, making the accuracy and flexibility of the automatic assembly and adjustment of the cylindrical lens higher;

[0026] 2) In the present invention, parts such as the laser diode seat, the lens barrel, and the screws are cancelled in the laser module, which increases the heat transfer efficiency between the light source and the housing, with a higher fit degree and better concentricity between the two. At the same time, the material cost is reduced, the production efficiency is increased, and the reliability of the product is improved;

[0027] 3) The present invention realizes automatic assembly and adjustment with higher precision and in more directions by automatically improving the structure and assembly and adjustment process of the existing laser module, cancelling the traditional assembly and adjustment method of adjusting screws, and adopting a new type of laser module and a universal adjustment structure composed of a spherical ring and a threaded pressure ring that cooperate with it.

[0028] 4) By placing the spherical laser module into the laser installation hole, using the spherical ring and the threaded compression ring for universal fine adjustment and fixing the laser module, and directly installing and adjusting the cylindrical lens, and still meeting the accuracy index after verification of high and low temperature reliability and vibration reliability, the assembled pendulum body can be assembled onto the laser alignment instrument base without further adjustment; compared with the original installation and adjustment method, the present invention simplifies the installation and adjustment process, cancels the processes such as screwing the screws on the outer shell of the laser module section, adjusting the laser line horizontally, screwing the screws on the pendulum body, pre-tightening the screws, and readjusting after assembling the pendulum body onto the base, greatly improving the production efficiency of the laser module section and the whole machine section, reducing the production cost, improving the installation and adjustment accuracy of the laser alignment instrument. At the same time, the use of adjustment screws is reduced, the weight of the device is reduced, and it has significant industrial application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 FIG. is an assembly schematic diagram of the five-in-one integrated pendulum body and the laser module in Embodiment 1 of the present invention.

[0030] Figure 2 is Figure 1 a cross-sectional view of.

[0031] Figure 3 is Figure 2 a partial enlarged view of.

[0032] Figure 4 FIG. is a schematic diagram of the universal adjustment principle.

[0033] Figure 5 FIG. is a structural schematic diagram of the spherical one-line laser module in Embodiment 2 of the present invention; wherein (a) is the overall structure and (b) is the cross-sectional view.

[0034] Figure 6 FIG. is a structural schematic diagram of the base and the slider in Embodiment 2 of the present invention; wherein (a) is the base and (b) is the slider.

[0035] Figure 7 FIG. is a structural schematic diagram of the spherical one-line laser module in Embodiment 3 of the present invention; wherein (a) is the overall structure and (b) is the cross-sectional view.

[0036] Figure 8 FIG. is an assembly schematic diagram of the pendulum body and the spherical one-line laser module in Embodiment 4 of the present invention.

[0037] Figure 9 FIG. is an assembly schematic diagram of the pendulum body and the spherical one-line laser module in Embodiment 5 of the present invention.

[0038] Figure 10 FIG. is an assembly schematic diagram of the pendulum body and the spherical one-line laser module in Embodiment 6 of the present invention.

[0039] Wherein: 1 - pendulum body; 11 - counterweight hole; 12 - glue injection hole; 13 - wire threading hole; 14 - inclined mounting hole; 15 - horizontal mounting hole; 2 - laser module; 21 - cylindrical lens; 22 - pressing cylinder; 23 - lens group; 24 - housing; 25 - laser diode; 3 - spherical ring; 4 - threaded pressing ring. Specific Embodiment

[0040] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the following will describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0041] Embodiment 1

[0042] As Figures 1 to 3 shown, this embodiment provides an automatic assembly and adjustment mechanism applied to a five-in-one laser marking instrument, including a pendulum body 1, a laser module 2, a spherical ring 3 and a threaded pressing ring 4.

[0043] The pendulum body 1 of the five-in-one laser marking instrument is a long strip structure. Along the circumference of the upper part of the pendulum body 1, an inclined mounting hole 14 is provided every 90°. The included angle between each inclined mounting hole 14 and the center line of the pendulum body 1 is 50°. In the middle of the pendulum body 1 directly below one of the inclined mounting holes 14, a horizontal mounting hole 15 perpendicular to the center line of the pendulum body 1 is provided.

[0044] Both the inclined mounting hole 14 and the horizontal mounting hole 15 are stepped holes composed of a first step and a second step, and the outer hole diameter is larger than the inner hole diameter. The first step is located inside the second step and an arc chamfer is provided at the first step.

[0045] The laser module 2 is a one-line laser module, including a housing 24, a laser diode 25, a lens group 23, a pressing cylinder 22 and a cylindrical lens 21; the housing 24 is a housing structure with a through hole in the center. Among them, the end of the housing 24 is an arc-shaped outer surface, and the bottom surface is a plane perpendicular to the central axis. The laser diode 25 is installed in the cavity inside the end of the housing 24; the front end of the housing 24 is a cylindrical outer surface, and it is a stepped hole inside with the outer hole diameter larger than the inner hole diameter; the pressing cylinder 22 is a cylindrical structure with a through hole in the center; the pressing cylinder 22 is riveted in the outer hole at the front end of the housing 24 and fixes the lens group 23 in the inner hole at the front end of the housing 24; the cylindrical lens 21 is installed on the outer end face of the pressing cylinder 22 by gluing.

[0046] The inner wall of the spherical ring 3 is provided with an arc-shaped surface matching the arc-shaped surface of the laser module 2.

[0047] The threaded compression ring 4 is provided with external threads. The lower end of the threaded compression ring 4 presses the arc surface of the housing of the laser module 2 against the arc chamfer of the first step of the inclined mounting hole 14 and the horizontal mounting hole 15 through the spherical ring 3, so that the laser module 2, the spherical ring 3 and the threaded compression ring 4 form a closely - fitting universal adjustment mechanism as a whole; and there is a gap between the threaded compression ring 4 and the cylindrical surface of the housing of the laser module 2, thereby realizing universal adjustment. The pendulum body 1 is provided with a glue injection hole 12. After assembly and adjustment, the laser module 2 and the arc chamfer at the first step of the mounting hole are fixed through the glue injection hole 12.

[0048] The arc chamfer, the arc surface of the inner wall of the spherical ring 3 and the arc surface at the end of the housing 24 are concentric; the outer diameter of the front end of the cylindrical housing = 3.5 mm, the vertical distance between the upper end surface of the threaded compression ring after being pressed and the center of the circle = 8 mm, the embedding amount of the arc outer surface at the end of the housing into the inner wall of the threaded compression ring = 0.5 mm, the radius of the arc surface = 5.5 mm, the maximum angle that the laser module can be adjusted in any direction = 3.59°, the angle between the line connecting the center of the circle to the upper end of the arc chamfer and the central axis of the housing is = 66°, the vertical distance between the center of the arc surface at the end of the housing and the bottom surface of the end of the housing is greater than 2.55 mm.

[0049] The steps of assembly and adjustment using the above - mentioned automatic assembly and adjustment mechanism are as follows:

[0050] 1) Assemble the laser module 2. The installation sequence is: first, install the lens group 23 from the top of the housing 24 and fix the lens group 23 using the pressing cylinder 22; then press the laser diode 25 from the bottom of the housing 24. During the pressing process, check the size of the focusing spot, and slowly push the laser diode 25 with the assistance of a manipulator until the spot reaches the minimum, and then stop riveting the laser diode 25 to complete the installation.

[0051] 2) Put the five assembled laser modules 2 into the horizontal mounting holes 15 and the inclined mounting holes 14 respectively; install the spherical ring 3 so that the arc surface of the laser module 2 fits closely with the inner wall of the spherical ring 3; then rotate and screw in the threaded compression ring 4 and press the arc surface of the laser module 2 against the first step through the spherical ring 3, so that the laser module, the spherical ring and the threaded compression ring form a closely - fitting universal adjustment mechanism as a whole.

[0052] 3) Use the manipulator to grasp the part of the laser module 2 protruding from the pendulum body 1. At this time, the cylindrical lens 21 has not been installed on the laser module 2. Light up the laser module 2 and perform universal swing on the laser module 2 to adjust the light beam emitted by the laser module 2 to be concentric with the center of the mounting hole. Since the top thread pressing ring 4 is tightened and pressed, only fine universal adjustment of the laser module 2 with a high coefficient of friction can be performed here. After the concentricity is adjusted, glue is injected into the laser module 2 through the glue injection hole 12 for fixing.

[0053] 4) After completing the concentricity adjustment in the five mounting holes of the pendulum body 1, power on the laser diode 25, use the manipulator to grab the cylindrical lens 21 and place it on the pressure cylinder 22 of the laser module. When the light passing through the cylindrical lens and the light not passing through the cylindrical lens form a straight line, the adjustment of the cylindrical lens is completed and glue is injected for fixing.

[0054] In the pendulum body 1 of the laser level in this embodiment, compared with the traditional mechanism, the total number of screws is reduced by 32. At the same time, the weight of the laser module housing and the pendulum body is significantly reduced. Through the universal adjustment mechanism, using a one-time assembly process, the processes of screwing the screws on the outer shell of the laser module section, adjusting the laser line to be horizontal, screwing the screws on the pendulum body, pre-tightening the screws, and re-adjusting the pendulum body when assembling it to the base are cancelled, simplifying the original assembly and adjustment process, greatly improving the production efficiency of the laser module section and the whole machine section, reducing the production cost of the laser level, and laying a technical foundation for the subsequent realization of automated mass production of the laser level. In addition, in the present invention, the manipulator is used for assembly and adjustment, canceling the traditional method of adjusting the cylindrical lens with screws, realizing automated assembly and adjustment, improving the assembly and adjustment accuracy and production efficiency of the laser level, and having significant industrial application value.

[0055] Embodiment 2

[0056] As Figure 5 and 6 shown, this embodiment provides an automated assembly and adjustment mechanism applied to a five-in-one laser level. Different from Embodiment 1, the structure of the laser module 2 is different. In this embodiment, the cylindrical lens 21 is installed above the pressure cylinder 22 by means of the cooperation between the base and the slider. Specifically,

[0057] As Figure 5 and Figure 6 shown in (a) of Figure 6As shown in Figure (b), the slider is a cylindrical structure with a central opening. A protrusion that mates with the base chute is provided at the bottom of the slider, and a mounting groove is provided at the top of the slider. The cylindrical lens 21 is installed in the mounting groove. The slider is grasped by a manipulator and slides in the base chute to adjust the cylindrical lens 21, and after adjustment, it is fixed by dispensing glue.

[0058] Embodiment 3

[0059] As Figure 7 shown, this embodiment provides an automatic assembly and adjustment mechanism applied to a five-in-one laser alignment instrument. Different from Embodiment 1, the installation method of the cylindrical lens in the laser module 2 is different. In this embodiment, the cylindrical lens 21 is installed on the pressure cylinder 22 through a mounting seat; the mounting seat is a cylindrical structure, and a mounting hole is provided at its bottom. It is installed above the pressure cylinder 22 through the mounting hole and fixed on the housing 24. A through hole for laser emission and a groove for installing the cylindrical lens 21 are provided at the center of the top surface of the mounting seat. A plurality of screws are provided outside the through hole, and the cylindrical lens 21 is adjusted by screwing the screws.

[0060] Embodiment 4

[0061] As Figure 8 shown, this embodiment provides an automatic assembly and adjustment mechanism applied to a two-in-one laser alignment instrument. This assembly and adjustment mechanism is assembled by a pendulum body 1, a laser module 2, a spherical ring 3, and a threaded compression ring 4. The assembly and adjustment method is the same as that in Embodiment 1. Different from Embodiment 1, two inclined mounting holes 14 are provided at intervals of 180° along the circumference on the upper part of the pendulum body 1 of the two-in-one laser alignment instrument. The angle between each inclined mounting hole 14 and the center line of the pendulum body 1 is 50°. A laser module 2 is installed in one of the inclined mounting holes 14. A horizontal mounting hole 15 perpendicular to the center line of the pendulum body 1 is provided in the middle of the pendulum body 1 directly below the laser module 2, and a laser module 2 is installed in the horizontal mounting hole 15.

[0062] Embodiment 5

[0063] As Figure 9 shown, this embodiment provides an automatic assembly and adjustment mechanism applied to a three-in-one laser alignment instrument. This assembly and adjustment mechanism is assembled by a pendulum body 1, a laser module 2, a spherical ring 3, and a threaded compression ring 4. The assembly and adjustment method is the same as that in Embodiment 1. Different from Embodiment 1, the pendulum body 1 of the three-in-one laser alignment instrument is provided with an inclined mounting hole 14 at intervals of 90° along the circumference. The angle between each inclined mounting hole 14 and the center line of the pendulum body 1 is 50°. One laser module 2 is installed in each of two adjacent inclined mounting holes 14; a horizontal mounting hole 15 perpendicular to the center line of the pendulum body 1 is provided in the middle of the pendulum body 1 directly below one of the laser modules 2, and a laser module 2 is installed in the horizontal mounting hole 15.

[0064] Embodiment 6

[0065] As Figure 10 shown, this embodiment provides an automatic assembly and adjustment mechanism applied to an eight-in-one laser marking instrument. The assembly and adjustment mechanism is assembled by a pendulum body 1, a laser module 2, a spherical ring 3, and a threaded retaining ring 4. The assembly and adjustment method is the same as that of Embodiment 1. Different from Embodiment 1, on the upper part of the pendulum body 1 of the eight-in-one laser marking instrument, an inclined mounting hole 14 is provided at intervals of 90° along the circumferential direction. The included angle between each inclined mounting hole 14 and the center line of the pendulum body 1 is 50°; in the middle of the pendulum body 1 directly below each inclined mounting hole 14, a horizontal mounting hole 15 perpendicular to the center line of the pendulum body 1 is provided; a laser module 2 is installed in each of the four horizontal mounting holes 15 and the four inclined mounting holes 14.

[0066] Finally, it should be noted that the above embodiments are intended to illustrate the technical solutions of the present invention and do not constitute any form of limitation to the present invention. Those skilled in the art should fully understand that it is entirely feasible to modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on any part or all of the technical features therein. As long as these modifications or replacements do not deviate from the protection scope determined by the claims of the present invention, they should be regarded as reasonable extensions of the present invention.

Claims

1. An automatic adjustment mechanism for a laser marking instrument, characterized in that: It includes a pendulum body, a laser module, a spherical ring and a threaded pressure ring; The pendulum body is provided with a plurality of laser module mounting holes, the laser module mounting holes are stepped holes consisting of a first step and a second step, and the outer hole diameter is larger than the inner hole diameter; the first step is located inside the second step and a circular arc chamfer is provided at the first step; The laser module is a rotating body structure composed of a light source section and a laser output section, wherein the outer surface of the light source section is an arc surface, the bottom surface of the light source section is a plane perpendicular to the central axis of the laser module, and the outer surface of the laser output section is a cylindrical surface; the laser module is a straight line laser module, comprising an outer shell, a light source, a lens group, a pressing cylinder and a cylindrical mirror; the outer shell is a shell structure with a through hole in the center, wherein the end of the outer shell is an arc-shaped outer surface, and the light source is installed in its inner cavity; the front end of the outer shell is a cylindrical outer surface, the inside of which is a stepped hole and the outer hole diameter is larger than the inner hole diameter; a through hole for laser emission is provided in the center of the pressing cylinder, the pressing cylinder is installed in the outer hole at the front end of the outer shell and the lens group is fixed in the inner hole; the cylindrical mirror is installed on the pressing cylinder; The inner wall of the spherical ring is provided with an arc surface matching the arc surface of the laser module; The threaded pressing ring is provided with an external thread, and the lower end of the threaded pressing ring presses the arc surface of the laser module onto the arc chamfer at the first step through the spherical ring, so that the laser module, the spherical ring and the threaded pressing ring form a tightly fitting universal adjustment mechanism as a whole, and a gap is left between the threaded pressing ring and the cylindrical surface of the laser module, thereby realizing universal adjustment.

2. The automatic adjustment mechanism for a laser marking instrument according to claim 1, characterized in that: After adjustment, the cylindrical mirror is connected to the outer end surface of the pressing cylinder by gluing.

3. The automatic adjustment mechanism for a laser marking instrument according to claim 1, characterized in that: The cylindrical mirror is installed on the pressure cylinder by means of a base and a slider; the base is a cylindrical structure with a through hole in the center, which is installed above the pressure cylinder and fixed on the outer shell, the through hole on the base is concentric with the through hole on the pressure cylinder, a slide groove is provided in the middle of the upper surface of the base, and the bottom surface of the slide groove is an arc surface; the slider is a cylindrical structure with a hole in the center, a protrusion that matches the base slide groove is provided at the bottom of the slider, and an installation groove for installing the cylindrical mirror is provided on the top of the slider, and the cylindrical mirror is adjusted by sliding the slider in the base slide groove, and is fixed by glue after adjustment.

4. The automatic adjustment mechanism for a laser marking instrument according to claim 1, characterized in that: The cylindrical mirror is installed on the pressure cylinder through a mounting seat; the mounting seat is a cylindrical structure with a mounting hole at the bottom, and is installed above the pressure cylinder and fixed on the outer shell through the mounting hole. A through hole for laser emission and a groove for mounting the cylindrical mirror are provided in the center of the top surface of the mounting seat, and a plurality of screws for adjusting the cylindrical mirror are provided on the outside of the through hole.

5. The automatic adjustment mechanism for a laser marking instrument according to claim 1, characterized in that: The lens group comprises a plano-convex mirror, a gasket and a plano-concave mirror arranged in sequence from front to back; a matte thread is arranged on the inner wall of the housing between the lens group and the light source.

6. The automatic adjustment mechanism for a laser marking instrument according to claim 1, characterized in that: The pressing cylinder is installed at the front end of the shell by means of interference fit or thread fit; the light source is installed at the end of the shell by means of interference fit or thread fit.

7. A method for adjusting an automatic adjustment mechanism of a laser marking instrument according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. First, install the lens group from the front end of the housing and fix the lens group with a pressing cylinder; Then press the light source in from the end of the shell, check the size of the focal spot during the pressing process, and slowly push the light source in. When the required indicators are met, the installation is completed. S2. Place the assembled laser module into the laser module mounting hole on the pendulum; install the spherical ring so that the arc surface of the laser module fits tightly with the inner wall of the spherical ring; then rotate and screw the threaded pressing ring in and press the arc surface of the laser module into the first step through the spherical ring, so that the laser module, the spherical ring and the threaded pressing ring form a tightly fitting universal adjustment mechanism as a whole; S3. Use a manipulator to grasp the part of the laser module protruding from the pendulum, light the light source and perform universal swing on the laser module to adjust the light beam emitted by the laser module to be concentric with the center of the laser module mounting hole; after the concentricity adjustment is completed, glue the laser module to fix it; S4. After all the laser module mounting holes have been adjusted for concentricity, place the cylindrical mirror on the pressing cylinder of the laser module with the light source turned on. Adjust the cylindrical mirror to the appropriate position by detecting the light spot position and then fix it with glue.

8. A laser marking instrument, characterized in that: The laser marking instrument comprises an automatic assembly and adjustment mechanism for a laser marking instrument as described in any one of claims 1-6.

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