Automatic focusing device of laser module

Abstract

The utility model discloses an automatic focusing device for a laser module, which comprises a laser light source positioning assembly, a light source power supply assembly, a laser module positioning assembly, a focusing driving assembly and a light spot detection assembly, and relates to the technical field of lasers. Meanwhile, the riveting pressure is controlled through force feedback, and the control precision is improved; the positioning and power supply integrated design of the laser light source assembly simplifies the manual wiring process and improves the working efficiency; a positioning clamp of the laser module is optimized, a feeding position and a working position are separated, and the laser module at the feeding position is automatically pushed into the working position through a feeding and discharging air cylinder, so that the positioning accuracy and reliability are improved; in the focusing process, the visual light spot detection unit collects light spot images in real time, a closed-loop control servo electric cylinder is analyzed through an algorithm, the laser is adjusted to be focused to the optimal state, the mode that the focusing state is manually judged in the past is replaced, the unstable condition is avoided, the labor intensity is relieved, and the product quality standard is improved.

Description

Technical Field

[0001] This utility model relates to the field of laser technology, specifically to an automatic focusing device for a laser module. Background Technology

[0002] Laser module autofocusing devices are a technology used to achieve automatic focusing of laser beams, widely applied in fields such as measurement, medical aesthetics, optical inspection, laser processing, and 3D printing. Their core objective is to ensure that laser energy is precisely applied to the target surface by detecting and adjusting the laser focus position in real time, thereby improving processing accuracy, efficiency, or treatment effectiveness. Traditional laser module focusing mainly relies on manual adjustment or a fixed focal length design, which suffers from insufficient precision. Manual adjustment depends on operator experience and is difficult to meet micron-level focusing requirements, such as in semiconductor processing or precision medicine. For moving targets or workpieces with uneven surfaces, such as metal cutting or curved surface engraving, a fixed focal length can lead to focus shift, resulting in poor dynamic response and affecting processing quality. Frequent manual adjustments increase production time costs and are inefficient, failing to meet the needs of automated production lines. Therefore, this project was developed to address these issues through in-depth research. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an automatic focusing device for laser modules, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: an automatic focusing device for a laser module, comprising a laser source positioning component, a source power supply component, a laser module positioning component, a focusing drive component, and a spot detection component;

[0005] The spot detection component includes a visual recognition module and a spot receiving plate. The visual recognition module is arranged coaxially with the laser source, and the spot receiving plate is a semi-transparent thin plate installed at a standard focal length position between the laser source and the visual recognition module.

[0006] The focusing drive component is vertically mounted and the upper end of the output shaft is coaxially mounted with the light source positioning component. The light source power supply component is mounted parallel to the front of the laser light source positioning component.

[0007] The focusing drive assembly includes a fixed plate with a mounting hole in the center and a servo cylinder mounted on the bottom surface. The laser source positioning assembly, flange, and pressure sensor are coaxially mounted on the output shaft of the servo cylinder. Two vertical plates are symmetrically and vertically mounted on the upper surface of the fixed plate, and the laser module positioning assembly is mounted on the vertical plates.

[0008] The aforementioned laser module positioning component includes a positioning plate mounted on a vertical plate. A T-shaped groove is provided on the center line of the lower end face of the positioning plate. The T-shaped groove has an opening below it and is provided with a platform slide. A boss positioning surface is symmetrically provided at the center position of the end of the T-shaped groove.

[0009] The positioning plate has a square inlet at the central axis position and a light outlet at the center. An inlet / outlet cylinder is installed below the positioning plate. The moving end of the inlet / outlet cylinder is connected to the bracket through a connecting plate. A positioning block is installed on the top of the bracket. The positioning block is L-shaped and has a U-shaped groove structure at the end for positioning and ejecting the laser module.

[0010] The aforementioned laser source positioning assembly includes a positioning seat arranged in a cylindrical stepped shaft shape. The positioning seat has a through hole in the center and a riveted cylindrical head on the top. The riveted cylindrical head has a semi-circular hole on the top for installing a positioning sleeve. The positioning sleeve is used to position the laser source. The bottom of the positioning seat has a connecting seat that is coaxially and perpendicularly installed with the flange.

[0011] The aforementioned light source power supply assembly includes a lifting cylinder disposed on the front of the positioning seat. The upper half of the positioning seat is provided with a square probe slot. A probe bracket is installed on the output end of the lifting cylinder. One end of the probe bracket is provided with a probe sleeve positioning hole that extends into the probe slot. A probe sleeve is installed in the probe sleeve positioning hole, and a probe is installed in the probe sleeve. The probe sleeve positioning hole is coaxially arranged with the riveting cylindrical head.

[0012] The probe sleeve has a positioning pin hole on the outside to position the probe and ensure that it is aligned with the pin direction of the laser source. Beneficial effects

[0013] This utility model provides an automatic focusing device for laser modules. It offers the following advantages: The automatic focusing device employs a high-precision servo cylinder to accurately control the focusing distance, while force feedback control of the riveting pressure further enhances control accuracy; the integrated design of the laser source component positioning and power supply simplifies manual wiring and improves work efficiency; the laser module positioning fixture has been optimized, separating the loading and working positions, with the loading / unloading cylinder automatically pushing the laser module from the loading position to the working position, improving positioning accuracy and reliability; the addition of a pressure sensor and anti-collision protection during focusing provides sufficient safety; during focusing, a visual spot detection unit collects spot images in real time, and through algorithm analysis, uses a closed-loop control servo cylinder to adjust the laser focusing to the optimal state, replacing the previous manual focusing method, avoiding instability, reducing labor intensity, and improving product quality standards. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the overall layout structure of the automatic focusing device for a laser module described in this utility model.

[0015] Figure 2 This is an isometric structural diagram of the focusing drive assembly described in this utility model.

[0016] Figure 3 This is a front view structural diagram of the laser module positioning component described in this utility model.

[0017] Figure 4 This is an isometric structural diagram of the laser module positioning component described in this utility model.

[0018] Figure 5 This is an exploded structural diagram of the laser source positioning component and the source power supply component described in this utility model.

[0019] In the diagram: 1. Visual recognition module; 2. Light spot receiving board; 3. Laser module positioning component; 4. Light source power supply component; 5. Laser light source positioning component; 6. Focusing drive component; 7. Vertical plate; 8. Fixing plate; 9. Servo electric cylinder; 10. Pressure sensor; 11. Flange; 12. Light outlet hole; 13. Feed port; 14. Positioning plate; 15. Feed / discharge cylinder; 16. Positioning block; 17. Laser module; 18. Connecting plate; 19. Bracket; 20. Positioning surface; 21. T-slot; 22. Laser light source; 23. Positioning sleeve; 24. Probe; 25. Probe sleeve; 26. Probe bracket; 27. Lifting cylinder; 28. Semi-circular hole; 29. ​​Riveted cylindrical head; 30. Probe sleeve positioning hole; 31. Probe slot; 32. Through hole; 33. Connecting seat. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example: Refer to the appendix of the instruction manual Figure 1-5As can be seen, this application specifically designs an automatic focusing device for a laser module, including a laser source positioning component 5, a source power supply component 4, a laser module positioning component 3, a focusing drive component 6, and a spot detection component; wherein the spot detection component includes a vision recognition module 1 and a spot receiving plate 2. The vision recognition module 1 is coaxially arranged with the laser source 22, and the spot receiving plate 2 is a semi-transparent thin plate installed at a standard focal length position between the laser source 22 and the vision recognition module 1. The spot receiving plate 2 is used to collect laser spot, and the vision recognition module 1 is used to identify and detect the quality and size of the spot, and collect pressure data for controlling the precise positioning of the servo electric cylinder;

[0022] The aforementioned focusing drive assembly 6 is vertically mounted, with its output shaft coaxially mounted with the upper end of the light source positioning assembly 5. The light source power supply assembly 4 is mounted parallel to the front of the laser light source positioning assembly 5. The focusing drive assembly 6 includes a fixing plate 8 with a mounting hole in its center and a servo cylinder 9 mounted on its bottom surface. The laser light source positioning assembly 5, flange 11, and pressure sensor 10 are coaxially mounted on the output shaft of the servo cylinder 9. Two vertical plates 7 are symmetrically mounted vertically on the upper surface of the fixing plate 8. The laser module positioning assembly 3 is mounted on the vertical plates 7. The servo cylinder 9 is mounted below the fixing plate 8 and has communication capabilities to receive data from the spot detection assembly for focusing control. The pressure sensor 10 is mounted at the output end of the servo cylinder 9 to collect focusing pressure and has communication capabilities to feed back the collected pressure data to the spot detection assembly for pressure control. The flange 11 has a mounting thread hole on its bottom surface for mounting and pressure control. Force sensor 10 is connected, and the upper end face of flange 11 is connected to connecting seat 33 in laser source positioning assembly; high-precision servo electric cylinder 9 is used to accurately control the focusing distance, and force feedback control of riveting pressure improves control accuracy; the laser source assembly positioning and power supply are integrated, simplifying manual wiring procedures and improving work efficiency; the positioning fixture of the laser module has been optimized, separating the loading position and the working position, and the infeed / outfeed cylinder 15 automatically pushes the laser module 17 from the loading position to the working position, improving positioning accuracy and reliability; the addition of pressure sensor 10 provides anti-collision protection during focusing, ensuring sufficient safety; during focusing, the visual spot detection unit collects spot images in real time, and uses algorithm analysis to control the servo electric cylinder to adjust the laser focusing to the optimal state, replacing the previous manual judgment of the focusing state, avoiding instability, reducing labor intensity, and improving product quality standards.

[0023] In the specific implementation process, the aforementioned laser module positioning component 3 includes a positioning plate 14 mounted on the upright plate 7. A T-shaped groove 21 is provided on the center line of the lower end face of the positioning plate 14. The T-shaped groove 21 has an opening at the bottom and is provided with a platform slide, the purpose of which is to provide support after the laser module 17 is fed in. A boss positioning surface 20 is symmetrically provided at the center position of the end of the T-shaped groove 21 for positioning the laser module. When the positioning block 16 is pushed in and the laser module 17 enters, it reaches the position of the positioning surface 20, so that the laser module 17 is accurately positioned at the center of the light outlet hole 12. At the same time, the T-shaped groove The top light-emitting hole 12 is stably positioned to bear the load on the upper surface of the laser module 17; a square inlet 13 is provided on the central axis of the positioning plate 14 for inserting and removing the laser module 17; a light-emitting hole 12 is provided in the center of the positioning plate 14 for laser light emission; an infeed / outfeed cylinder 15 is installed below the positioning plate 14; the moving end of the infeed / outfeed cylinder 15 is connected to the bracket 19 through the connecting plate 18; a positioning block 16 is installed on the top of the bracket 19; the positioning block 16 is L-shaped and has a U-shaped groove structure at the end for loading, positioning and unloading the laser module 17.

[0024] In specific implementation, the aforementioned laser source positioning assembly 5 includes a positioning seat arranged in a cylindrical stepped shaft shape. The positioning seat has a through hole 32 at its center, and a riveting cylindrical head 29 at its top. A semi-circular hole 28 is opened at the top of the riveting cylindrical head 29 for installing a positioning sleeve 23. The positioning sleeve 23 is used to position the laser source 22. A connecting seat 33 is provided at the bottom of the positioning seat and is coaxially and vertically installed with the flange 11. The light source power supply assembly 4 includes a lifting cylinder 27 located on the front of the positioning seat. The upper part of the positioning seat is equipped with… A square probe slot 31 provides space for the probe bracket 26 to move. The probe bracket 26 is installed on the output end of the lifting cylinder 27. One end of the probe bracket 26 has a probe sleeve positioning hole 30 that extends into the probe slot 31. A probe sleeve 25 is installed in the probe sleeve positioning hole 30, and a probe 24 is installed in the probe sleeve 25. The probe sleeve positioning hole 30 is coaxially arranged with the riveting cylindrical head 29. The outer side of the probe sleeve 25 has a positioning pin hole to position the probe 24 to ensure that the direction is consistent with the pin direction of the laser source 22.

[0025] The working principle is as follows: Initially, the infeed / outfeed cylinder 15, along with the positioning block 16, is positioned below the inlet 13; the lifting cylinder 27, along with the probe 24, is positioned below; and the servo cylinder 9, along with the light source power supply assembly 4 and the light source positioning assembly 5, is positioned below. First, the laser module 17 is placed vertically in the inlet 13 in the specified direction and inserted into the U-shaped groove of the positioning block 16. The laser light source 22 is then vertically inserted into the positioning sleeve 23 in the specified direction. At this point, the device is activated, and the infeed / outfeed cylinder 15 pushes the laser module 17 to the positioning surface 20 via the positioning block 16 for accurate positioning, ensuring the laser module 17 is coaxial with the light output hole 12. Then, the output end of the servo cylinder 9 rapidly advances upward according to the set program. When the front end of the laser light source 22 is about to contact the laser module 17, the speed is reduced to medium. At this time, the lifting cylinder 27 drives the probe 24 to rise, propelling the probe... The needle 24 contacts the pin of the laser source 22 to provide power. The laser source 22 emits a laser spot that illuminates the spot receiving board 2. At this moment, the vision recognition module 1 starts to collect the circular spot on the spot receiving board in real time. It calculates and analyzes parameters such as spot size, direction, and energy value through algorithms and compares them with the standard model to control the advancing distance and speed of the servo cylinder 9. During this process, the pressure sensor 10 detects the pushing pressure in real time and feeds back to control the thrust of the servo cylinder 9 to ensure stable thrust. When the pressure exceeds the set protection value, an alarm is triggered. When the spot parameters are qualified, the servo cylinder 9 stops advancing. At this time, the laser source 22 and the laser module 17 are tightly and stably integrated with an interference fit. Then, the servo cylinder 9 retracts to its original position, and the feeding cylinder 15 controls the positioning block 16 and the assembled finished laser module 17 to retract to the feeding port 13 position to remove the finished product.

[0026] In summary, the automatic focusing device for laser modules designed in this application features an integrated design for laser source component positioning and power supply, simplifying processes and improving efficiency; the improved positioning fixture for the laser module ensures stability and reliability; the high-precision servo cylinder mechanism accurately controls focusing, improving positioning accuracy and response speed; the intelligent visual spot detection unit collects spot images, analyzes them using algorithms, and uses a closed-loop control system to adjust the laser focusing to the optimal state with an accuracy down to the micrometer level, replacing the previous manual focusing process, avoiding instability, reducing labor intensity, and improving product quality standards; the addition of a pressure detection sensor provides anti-collision protection during focusing, ensuring safety; and the modular design of this invention offers flexible application and strong scalability.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic focusing device for a laser module, characterized in that, It includes a laser source positioning component (5), a source power supply component (4), a laser module positioning component (3), a focusing drive component (6), and a spot detection component; The light spot detection component includes a visual recognition module (1) and a light spot receiving plate (2). The visual recognition module (1) is coaxially arranged with the laser light source (22). The light spot receiving plate (2) is a semi-transparent thin plate installed at the standard focal length position between the laser light source (22) and the visual recognition module (1). The focusing drive assembly (6) is vertically mounted and the upper end of the output shaft is coaxially mounted with the light source positioning assembly (5). The light source power supply assembly (4) is mounted parallel to the front of the laser light source positioning assembly (5). The focusing drive assembly (6) includes a fixed plate (8), which has a mounting hole in the center and a servo cylinder (9) mounted on its bottom surface. The laser source positioning assembly (5), flange (11), and pressure sensor (10) are coaxially mounted on the output shaft of the servo cylinder (9). Two vertical plates (7) are symmetrically mounted on the upper surface of the fixed plate (8), and the laser module positioning assembly (3) is mounted on the vertical plates (7).

2. The automatic focusing device for a laser module according to claim 1, characterized in that, The laser module positioning component (3) includes a positioning plate (14) on the upright plate (7). A T-shaped groove (21) is provided on the center line of the lower end face of the positioning plate (14). The T-shaped groove (21) has an opening below and a platform slide is provided. A boss positioning surface (20) is symmetrically provided at the center position of the end of the T-shaped groove (21).

3. The automatic focusing device for a laser module according to claim 2, characterized in that, The positioning plate (14) has a square inlet (13) at the central axis position, and the positioning plate (14) has a light outlet hole (12) at the center. The positioning plate (14) is equipped with a feeding and discharging cylinder (15) below it. The moving end of the feeding and discharging cylinder (15) is connected to the bracket (19) through a connecting plate (18). The bracket (19) is equipped with a positioning block (16) on the top. The positioning block (16) is L-shaped and has a U-shaped groove structure at the end for feeding, positioning and unloading of the laser module (17).

4. The automatic focusing device for a laser module according to claim 1, characterized in that, The laser source positioning assembly (5) includes a positioning seat arranged in a cylindrical stepped shaft shape. The positioning seat has a through hole (32) in the center. The top of the positioning seat has a riveted cylindrical head (29). The top of the riveted cylindrical head (29) has a semi-circular hole (28) for installing a positioning sleeve (23). The positioning sleeve (23) is used to position the laser source (22). The bottom of the positioning seat has a connecting seat (33) that is coaxially and vertically installed with the flange (11).

5. The automatic focusing device for a laser module according to claim 4, characterized in that, The power supply assembly (4) for the light source includes a lifting cylinder (27) located on the front of the positioning seat. The upper half of the positioning seat is provided with a square probe slot (31). A probe bracket (26) is installed on the output end of the lifting cylinder (27). One end of the probe bracket (26) is provided with a probe sleeve positioning hole (30) and extends into the probe slot (31). A probe sleeve (25) is installed in the probe sleeve positioning hole (30). A probe (24) is installed in the probe sleeve (25). The probe sleeve positioning hole (30) is coaxially arranged with the riveting cylindrical head (29).

6. The automatic focusing device for a laser module according to claim 5, characterized in that, The probe sleeve (25) has a positioning pin hole on the outside to position the probe (24) so ​​that the direction is consistent with the pin direction of the laser source (22).

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