Automatic assembling and adjusting mechanism and method for laser marking instrument and application of automatic assembling and adjusting mechanism and method

Abstract

The invention discloses an automatic assembling and adjusting mechanism and method for a laser marking instrument and application, and belongs to the field of laser marking instruments. By improving an existing laser module structure and an assembling and adjusting process, a traditional assembling and adjusting mode of adjusting screws is omitted, a universal adjusting structure is formed by the novel laser module and the spherical ring and the threaded pressing ring matched with the novel laser module, and automatic assembling and adjusting with higher precision and more directions are achieved. The spherical ring and the threaded pressing ring are used for universal fine adjustment, the laser module is fixed, the cylindrical mirror is directly installed and adjusted, and the precision index is still met through verification of high and low temperature reliability and vibration reliability, so that the installed and adjusted pendulum body is assembled on the base and does not need to be adjusted again, the original structure and the installation and adjustment process are simplified, and the installation and adjustment efficiency is improved. And moreover, automatic installation and adjustment can be realized, the operation is rapid and simple, the precision is reliable, the production efficiency of the laser module section and the whole machine section is greatly improved, the production cost is reduced, and a technical foundation is laid for subsequent automatic mass production of the laser marking instrument.

Description

Technical Field

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

[0002] As a measuring instrument, the laser marking instrument is widely used in engineering measurement and interior decoration. It provides horizontal and plumb references and is a high-precision photoelectric instrument. The laser marking instrument includes a base, a column and a suspension mechanism. The suspension mechanism includes a cross and a pendulum. The pendulum is provided with a laser mounting hole, and the laser module is installed in the laser mounting hole.

[0003] At present, the most important link in the production process of laser marking instrument is the laser line adjustment work. The adjustment work is done manually. Each laser module is adjusted according to its position and function, and the position of the laser line on the target in each direction is observed. The laser module is adjusted through multiple screws on the pendulum body so that the emitted laser line reaches the required index. Due to the inherent structure of the pendulum body and laser module of the laser marking instrument, the debugging process requires two processes: first, according to the position of the laser module assembled on the pendulum body, the optical axis index of each laser module is adjusted by adjusting the screws on the pendulum body, and an optical axis is determined according to the mechanical rotation axis of the pendulum body; after high temperature, vibration and other tests, the screws loosen and deviate, and there is stress release. After the deviation, the adjusted accuracy cannot be restored. Therefore, after the pendulum body is assembled on the base and the counterweight is adjusted, each laser module must be fine-tuned again by adjusting the screws according to the mechanical rotation axis of the whole machine to obtain the optical axis index based on the individual and the whole. Since the laser marking instrument is a precision instrument with strict performance requirements, the above-mentioned calibration work is very tedious and complicated, resulting in high calibration costs for laser marking instruments in the industry and difficulty in achieving automated mass production. Summary of the invention

[0004] In order to solve the problems of complex structure, complex assembly and laser line adjustment process of traditional laser line marking instruments, the present invention provides an automatic adjustment mechanism for laser line marking instruments. By designing the structure of the laser module and the universal adjustment structure matched therewith, the required laser line index can be achieved with one adjustment. After the pendulum is installed on the base of the line marking instrument, there is no need to adjust it again, which simplifies the original structure and adjustment process. The adjustment mechanism realizes automatic adjustment and eliminates the traditional screw adjustment method. The operation is fast and simple, the accuracy is reliable, the production efficiency of the laser module section and the laser line marking instrument whole machine section is greatly improved, the production cost of the laser line marking instrument is reduced, and a technical foundation is laid for the subsequent realization of automatic mass production of laser line marking instruments.

[0005] The technical solution of the present invention is as follows: On one hand, the present invention provides an automatic assembly and adjustment mechanism for a laser marking instrument, comprising a pendulum, 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 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 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.

[0006] Furthermore, the laser module includes 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 the inner cavity thereof; 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 fixes the lens group in the inner hole; the cylindrical mirror is installed on the pressing cylinder.

[0007] Furthermore, the arc chamfer, the arc surface of the inner wall of the spherical ring and the arc surface of the end of the laser module shell are concentric; the vertical distance between the center of the arc surface of the end of the shell and the bottom surface of the end of the shell is greater than mm, ;in, is the radius of the arc surface, ; The maximum angle that the laser module can be adjusted in any direction. ≥3.5°; It is the angle between the line from the center of the circle to the upper end of the arc chamfer and the center axis of the shell; is the outer diameter of the cylindrical front end of the housing; It is the vertical distance between the upper end face of the threaded pressing ring and the center of the circle; The amount of embedding of the arc-shaped outer surface at the end of the housing into the inner wall of the threaded pressing ring. ≥0.5mm.

[0008] Furthermore, the cylindrical mirror is connected to the outer end surface of the pressing cylinder by gluing after adjustment.

[0009] Furthermore, 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 cooperates with the slide groove of the base 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 slide groove of the base, and is fixed by gluing after adjustment.

[0010] Furthermore, the cylindrical mirror is mounted on the pressure cylinder through a mounting seat; the mounting seat is a cylindrical structure with a mounting hole at the bottom, and is mounted 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 at the center of the top surface of the mounting seat, and a plurality of screws are provided on the outside of the through hole for adjusting the cylindrical mirror.

[0011] Furthermore, the lens group includes a plano-convex mirror, a gasket and a plano-concave mirror arranged in sequence from front to back; and a matte thread is provided on the inner wall of the housing between the lens group and the light source.

[0012] Furthermore, the pressing cylinder is installed at the front end of the shell by means of interference fit or thread fit; and the light source is installed at the end of the shell by means of interference fit or thread fit.

[0013] A second aspect of the present invention provides a method for adjusting the above-mentioned automatic adjustment mechanism of the laser marking instrument, comprising the following steps: 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 from the end of the housing, 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.

[0014] The third aspect of the present invention further provides a laser line marker, which includes the above-mentioned automatic assembly and adjustment mechanism of the laser line marker.

[0015] Beneficial effects of the present invention: 1) The present invention improves the structure of the laser module, adopts bidirectional assembly to install the collimator lens assembly and the light source at both ends of the housing respectively, the one-way depth is shallow, the front end positive assembly of the collimator lens assembly has more sufficient space, the assembly accuracy is significantly enhanced, and it is convenient to realize accurate automatic adjustment of the optical lens; and the pressing cylinder can also be used as a cylindrical mirror support frame, so that the relative parallelism between the cylindrical mirror support end face and the double lens is better, and the traditional screw adjustment method of the cylindrical mirror is eliminated, so that automatic adjustment can be realized, and the accuracy and flexibility of the automatic adjustment of the cylindrical mirror are higher; 2) The laser module of the present invention eliminates parts such as the laser diode holder, lens barrel, and screws, thereby increasing the heat transfer efficiency between the light source and the housing, achieving a higher fit and better concentricity, while reducing material costs, increasing production efficiency, and improving product reliability; 3) The present invention improves the existing laser module structure and adjustment process through automation, cancels the traditional adjustment method of adjusting screws, adopts a new laser module and a spherical ring and a threaded pressure ring to form a universal adjustment structure, and realizes automated adjustment with higher precision and more directions; 4) The present invention places the spherical laser module into the laser mounting hole, uses a spherical ring and a threaded pressure ring to perform universal fine-tuning and fix the laser module, and directly adjusts the cylindrical mirror. The high and low temperature reliability and vibration reliability verification still meet the accuracy indicators, so that the adjusted pendulum body can be assembled on the base of the laser marking instrument without further adjustment. Compared with the original adjustment method, the present invention simplifies the adjustment process, eliminates the steps of screwing the laser module segment housing, adjusting the laser line horizontally and screwing the pendulum body, pre-tightening the screws, and re-adjusting the pendulum body after it is assembled on the base, greatly improving the production efficiency of the laser module segment and the whole machine segment, reducing the production cost, and improving the adjustment accuracy of the laser marking instrument. At the same time, it reduces the use of adjustment screws and reduces the weight of the device, and has significant industrial application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the assembly of the five-in-one integrated pendulum and laser module in Example 1 of the present invention.

[0017] Figure 2 for Figure 1 sectional view of .

[0018] Figure 3 for Figure 2 A partial enlarged view of .

[0019] Figure 4This is a schematic diagram of the universal adjustment principle.

[0020] Figure 5 Schematic diagram of the structure of the spherical straight line laser module in Example 2 of the present invention; (a) is the overall structure, and (b) is a cross-sectional view.

[0021] Figure 6 Schematic diagram of the structure of the base and the slider in Example 2 of the present invention; (a) is the base, and (b) is the slider.

[0022] Figure 7 Schematic diagram of the structure of the spherical straight line laser module in Example 3 of the present invention; (a) is the overall structure, and (b) is a cross-sectional view.

[0023] Figure 8 It is a schematic diagram of the assembly of the pendulum body and the spherical straight line laser module in Example 4 of the present invention.

[0024] Fig. 9 It is a schematic diagram of the assembly of the pendulum body and the spherical straight line laser module in Example 5 of the present invention.

[0025] Fig.10 It is a schematic diagram of the assembly of the pendulum body and the spherical straight line laser module in Example 6 of the present invention.

[0026] Among them: 1- pendulum body; 11- counterweight hole; 12- glue injection hole; 13- threading hole; 14- inclined mounting hole; 15- horizontal mounting hole; 2- laser module; 21- cylindrical mirror; 22- pressing cylinder; 23- lens group; 24- housing; 25- laser diode; 3- spherical ring; 4- threaded pressing ring. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the specific implementation modes of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] Example 1 like Figures 1 to 3 As 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 pressure ring 4.

[0029] The pendulum body 1 of the five-in-one laser marking instrument is a long strip structure. An inclined mounting hole 14 is provided at an interval of 90° along the circumferential direction on the upper part of the pendulum body 1. The angle between each inclined mounting hole 14 and the center line of the pendulum body 1 is 50°. A horizontal mounting hole 15 perpendicular to the center line of the pendulum body 1 is provided in the middle part of the pendulum body 1 directly below one of the inclined mounting holes 14.

[0030] The inclined mounting hole 14 and the horizontal mounting hole 15 are both 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 an arc chamfer is provided at the first step.

[0031] The laser module 2 is a straight-line laser module, comprising a shell 24, a laser diode 25, a lens group 23, a pressing cylinder 22 and a cylindrical mirror 21; the shell 24 is a shell structure with a through hole in the center, wherein the end of the shell 24 is an arc-shaped outer surface, the bottom surface is a plane perpendicular to the central axis, and the laser diode 25 is installed in the cavity in the end of the shell 24; the front end of the shell 24 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; the pressing cylinder 22 is a cylindrical structure with a through hole in the center; the pressing cylinder 22 is riveted into the outer hole at the front end of the shell 24 and fixes the lens group 23 in the inner hole at the front end of the shell 24; the cylindrical mirror 21 is installed on the outer end face of the pressing cylinder 22 by gluing.

[0032] The inner wall of the spherical ring 3 is provided with an arc surface matching the arc surface of the laser module 2 .

[0033] The threaded pressing ring 4 is provided with an external thread, and the lower end of the threaded pressing ring 4 presses the arc surface of the laser module 2 shell onto 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 pressing ring 4 form a tightly matched universal adjustment mechanism as a whole; and there is a gap between the threaded pressing ring 4 and the cylindrical surface of the laser module 2 shell, so as to achieve universal adjustment. The pendulum body 1 is provided with a glue injection hole 12, and after installation and adjustment, the laser module 2 is fixed to the arc chamfer at the first step of the mounting hole through the glue injection hole 12.

[0034] The arc chamfer, the arc surface of the inner wall of the spherical ring 3 and the arc surface at the end of the shell 24 are concentric; the outer diameter of the cylindrical front end of the shell =3.5mm, the vertical distance between the upper end face and the center of the circle after the threaded pressure ring is tightened =8mm, the embedding amount of the arc outer surface at the end of the shell into the inner wall of the threaded pressing ring =0.5mm, radius of the curved surface =5.5mm, the maximum angle that the laser module can adjust in any direction =3.59°, the angle between the line from the center of the circle to the upper end of the arc chamfer and the center axis of the shell is =66°, and the vertical distance between the center of the arc-shaped surface at the end of the shell and the bottom surface of the end of the shell is greater than 2.55 mm.

[0035] The steps of adjusting by using the above-mentioned automatic adjustment mechanism are as follows: 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 with 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 focal spot, and slowly push the laser diode 25 in with the help of a robot until the spot reaches the minimum, then stop riveting the laser diode 25 to complete the installation.

[0036] 2) Place the five assembled laser modules 2 into the horizontal mounting hole 15 and the inclined mounting hole 14 respectively; install the spherical ring 3 so that the arc surface of the laser module 2 fits tightly with the inner wall of the spherical ring 3; then rotate and screw the threaded pressing ring 4 in and press the arc surface of the laser module 2 into the first step through the spherical ring 3, so that the laser module, the spherical ring and the threaded pressing ring form a tightly fitting universal adjustment mechanism as a whole.

[0037] 3) Use the manipulator to grasp the part of the laser module 2 protruding from the pendulum 1. At this time, the laser module 2 has not yet been installed with the cylindrical mirror 21. Light up the laser module 2 and perform a 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 installation hole. Since the threaded pressure ring 4 at the top is tightened, only fine universal adjustments of the laser module 2 with a high friction coefficient can be performed here. When the concentricity adjustment is completed, glue is applied to the laser module 2 through the glue injection hole 12 to fix it.

[0038] 4) After completing the concentricity adjustment in the five mounting holes of the pendulum body 1, power on the laser diode 25, use a robot to grab the cylindrical mirror 21 and place it on the pressing cylinder 22 of the laser module. When the light passing through the cylindrical mirror and the light not passing through the cylindrical mirror form a straight line, the cylindrical mirror is adjusted and fixed by gluing.

[0039] The pendulum body 1 of the laser marking instrument in this embodiment eliminates a total of 32 screws compared to the traditional mechanism, and significantly reduces the weight of the laser module housing and the pendulum body. Through the universal adjustment mechanism, a one-time assembly process is adopted, which eliminates the processes of screwing the laser module shell, adjusting the laser line horizontally, screwing the pendulum body, pre-tightening the screws, and assembling the pendulum body to the base and adjusting it again, simplifying the original adjustment process, greatly improving the production efficiency of the laser module section and the whole machine section, reducing the production cost of the laser marking instrument, and laying a technical foundation for the subsequent realization of automated mass production of laser marking instruments. In addition, the present invention adopts a manipulator for adjustment, eliminates the traditional screw adjustment method of the cylindrical mirror, realizes automated adjustment, improves the adjustment accuracy and production efficiency of the laser marking instrument, and has significant industrial application value.

[0040] Example 2 like Figure 5 and 6As shown, this embodiment provides an automatic adjustment mechanism for a five-in-one laser marking instrument. The difference from the first embodiment is that the structure of the laser module 2 is different. In this embodiment, the cylindrical mirror 21 is installed above the pressing cylinder 22 by means of a base and a slider. Specifically, like Figure 5 and Figure 6 As shown in (a), the base is a cylindrical structure with a through hole in the center. It is installed above the pressing cylinder 22 and fixed on the shell 24. The through hole on the base is concentric with the through hole on the pressing cylinder 22. 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. Figure 6 As shown in (b), the slider is a cylindrical structure with a hole in the center. A protrusion matching the base slide groove is provided at the bottom of the slider, and a mounting groove is provided at the top of the slider. The cylindrical mirror 21 is installed in the mounting groove. The slider is grasped by a robot and slides in the base slide groove to adjust the cylindrical mirror 21, which is then fixed by gluing after adjustment.

[0041] Example 3 like Figure 7 As shown, this embodiment provides an automated assembly and adjustment mechanism for a five-in-one laser marking instrument. The difference from Embodiment 1 is that the cylindrical mirror in the laser module 2 is installed in a different manner. In this embodiment, the cylindrical mirror 21 is installed on the pressure cylinder 22 through a mounting seat; the mounting seat is a cylindrical structure with a mounting hole at the bottom. It is installed above the pressure cylinder 22 and fixed on the outer shell 24 through the mounting hole. A through hole for laser emission and a groove for installing the cylindrical mirror 21 are provided in the center of the top surface of the mounting seat. A plurality of screws are provided on the outside of the through hole, and the cylindrical mirror 21 is adjusted by tightening the screws.

[0042] Example 4 like Figure 8 As shown, this embodiment provides an automatic adjustment mechanism for a two-in-one laser line marker, which is assembled from a pendulum body 1, a laser module 2, a spherical ring 3 and a threaded pressure ring 4, and the adjustment method is the same as that of Example 1. Different from Example 1, an inclined mounting hole 14 is provided at an interval of 180° along the circumferential direction on the upper part of the pendulum body 1 of the two-in-one laser line marker, and 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, and 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.

[0043] Example 5 like Fig. 9As shown, this embodiment provides an automatic adjustment mechanism for a three-in-one laser line marker, which is assembled from a pendulum body 1, a laser module 2, a spherical ring 3 and a threaded pressure ring 4, and the adjustment method is the same as that of Example 1. Different from Example 1, an inclined mounting hole 14 is provided at every 90° along the circumferential direction on the upper part of the pendulum body 1 of the three-in-one laser line marker, and the angle between each inclined mounting hole 14 and the center line of the pendulum body 1 is 50°, wherein a 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 part 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.

[0044] Example 6 like Fig.10 As shown, this embodiment provides an automatic adjustment mechanism for an eight-in-one laser line marker, which is assembled from a pendulum body 1, a laser module 2, a spherical ring 3 and a threaded pressure ring 4, and the adjustment method is the same as that of Example 1. Different from Example 1, an inclined mounting hole 14 is provided at every 90° along the circumferential direction on the upper part of the pendulum body 1 of the eight-in-one laser line marker, and the angle between each inclined mounting hole 14 and the center line of the pendulum body 1 is 50°; a horizontal mounting hole 15 perpendicular to the center line of the pendulum body 1 is provided in the middle part of the pendulum body 1 directly below each inclined mounting hole 14; and a laser module 2 is installed in each of the four horizontal mounting holes 15 and the four inclined mounting holes 14.

[0045] 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 on the present invention. Those skilled in the art should fully understand that it is completely feasible to modify the technical solutions described in the above embodiments or to perform equivalent replacements on any part or all of the technical features therein. These modifications or replacements, as long as they do not deviate from the scope of protection determined by the claims of the present invention, 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 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: 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.

3. The automatic adjustment mechanism for a laser marking instrument according to claim 2 is characterized in that: The arc chamfer, the arc surface of the inner wall of the spherical ring and the arc surface of the end of the laser module shell are concentric; the vertical distance between the center of the arc surface of the end of the shell and the bottom surface of the end of the shell is greater than mm, ;in, is the radius of the arc surface, ; The maximum angle that the laser module can be adjusted in any direction. ≥3.5°; It is the angle between the line from the center of the circle to the upper end of the arc chamfer and the center axis of the shell; is the outer diameter of the cylindrical front end of the housing; It is the vertical distance between the upper end face of the threaded pressing ring and the center of the circle; The amount of embedding of the arc-shaped outer surface at the end of the housing into the inner wall of the threaded pressing ring. ≥0.5mm.

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

5. The automatic adjustment mechanism for a laser marking instrument according to claim 2, 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.

6. The automatic adjustment mechanism for a laser marking instrument according to claim 2, 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.

7. The automatic adjustment mechanism for a laser marking instrument according to claim 2, 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.

8. The automatic adjustment mechanism for a laser marking instrument according to claim 2, 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.

9. A method for adjusting an automatic adjustment mechanism of a laser marking instrument according to any one of claims 2 to 8, 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.

10. 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 1-8.

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