A laser module with adjustable optical path for light-cured 3D printer

Abstract

The utility model relates to 3D printing technical field, especially a laser module for light solidification 3D printer with adjustable light path. The laser module includes installation bottom plate, laser transmitter, beam shaper, full reflection mirror and laser power detection device. Installation bottom plate is equipped with first hole array, second hole array, 5 hole combination hole and double hole group, is used for installing each component, full reflection mirror contains mirror seat, mirror body, angle adjusting module and height adjusting module, can realize the fine adjustment of light path, laser power detection device includes mounting seat, electrical integrated box, drive assembly and detection assembly, can flexibly go in and out of light path and real -time monitoring laser power. In addition, installation bottom plate still designs and has the structure such as reinforcing plate, waist shape step hole and transparent window, has improved the adaptability and stability of component installation. The utility model solves the problem that the existing laser module is complex to install and difficult to adjust light path, improves the performance and reliability of light solidification 3D printing technology.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a laser module for a photopolymerization 3D printer with adjustable optical path. Background Technology

[0002] Current laser modules used in photopolymer 3D printers typically consist of discrete optical components such as laser emitters, total reflection mirrors, and beam shapers. These components vary significantly in shape, interface, and mounting specifications. They can only be mounted on pre-milled mounting plates with specific aperture arrays, making them non-interchangeable or universal. Replacing any component necessitates re-machining the mounting plate, severely impacting component compatibility and spare parts management. Furthermore, due to the lack of standardized mounting standards, existing laser modules require individual assembly on the assembly line, often limiting their reuse to specific models and hindering cross-platform integration.

[0003] Furthermore, existing laser modules also suffer from the pain point of difficult optical path adjustment. Currently, the industry generally finds the optimal optical axis position by disassembling and assembling the mounting fasteners of components such as total reflection mirrors and beam shapers, and then relocking them onto the mounting plate. To reduce the number of component disassembly and assembly operations, some technicians in this field have added elongated holes or waist-shaped slots to the bottom of optical components to achieve one-dimensional sliding adjustment. However, elongated holes can only solve unidirectional displacement and cannot simultaneously adjust pitch and yaw.

[0004] Therefore, developing a laser module that can highly integrate components such as laser emitters, total reflection mirrors, and beam shapers into the same adjustable reference platform remains a pressing technical problem to be solved in this field. Utility Model Content

[0005] To address the technical challenge of developing a laser module that integrates components such as laser emitters, total reflection mirrors, and beam shapers onto a single adjustable reference platform, this invention provides a laser module for a photopolymerization 3D printer with an adjustable optical path, comprising a mounting base plate with a first aperture array, a second aperture array, and several 5-hole combination holes and double-hole groups.

[0006] The first aperture array is equipped with a laser emitter, the second aperture array is equipped with a beam shaper, the five-aperture combination aperture is equipped with a total reflection mirror, and the dual-aperture group is equipped with a laser power detection device.

[0007] The second aperture array also includes a clearance area for the beam shaper to propagate the laser beam;

[0008] The total reflection mirror includes a mirror base, a mirror body, an angle adjustment module, and a height adjustment module;

[0009] The mirror body is located in the middle of the mirror base;

[0010] The angle adjustment module is spring-mounted on the back side of the mirror base, with a gap between it and the mirror base;

[0011] The height adjustment module is located below the mirror base and the angle adjustment module. Its bottom is connected and fixed to the mounting base plate, and its top is inserted into the gap between the mirror base and the angle adjustment module and connected and fixed to the angle adjustment module.

[0012] The laser power detection device includes a mounting base, an electrical integration box, a driving component, and a detection component. The bottom of the mounting base is connected and fixed to a mounting base plate, and the electrical integration box and driving component are installed on the top. The end of the driving component is connected to the detection component and can drive the detection component to enter or leave the optical path.

[0013] In one embodiment, the mounting base plate further includes a first reinforcing plate; the first reinforcing plate has a plurality of first waist-shaped stepped holes in the central region and linear screw hole groups in the two side regions respectively.

[0014] In one embodiment, the mounting base plate further includes a second reinforcing plate; the second reinforcing plate has a window in the middle, and a second waist-shaped stepped hole and a matrix screw hole group are provided on both sides of the window in sequence.

[0015] Furthermore, the two adjacent sets of the first waist-shaped stepped holes or the second waist-shaped stepped holes in the long axis direction are staggered with each other.

[0016] Furthermore, the projected area of ​​the window is not less than the projected area of ​​the avoidance zone, and not more than 30% of the projected area of ​​the second reinforcing plate.

[0017] In one embodiment, the angle adjustment module includes a base plate and at least one adjustment screw; the adjustment screw passes through the base plate and abuts against any corner of the back of the mirror mount.

[0018] Furthermore, a spring is fitted onto the portion of the adjusting screw located in the gap between the mirror mount and the angle adjustment module.

[0019] In one embodiment, the height adjustment module includes a base plate and a vertical plate that are perpendicular to each other and form an L-shaped structure; both the base plate and the vertical plate are provided with waist-shaped holes.

[0020] Furthermore, the length of the top end of the upright plate is less than the length of the bottom end, and the thickness is less than the width of the gap between the mirror base and the angle adjustment module.

[0021] In one embodiment, the 5-hole combination includes a reuse hole, a first auxiliary hole pair, and a second auxiliary hole pair; the reuse hole is collinear with the first auxiliary hole pair and the second auxiliary hole pair, respectively, and the included angle between the first auxiliary hole pair and the second auxiliary hole pair is 30° to 45°.

[0022] In summary, compared with the prior art, the utility model has the following beneficial effects:

[0023] The laser module for photopolymer 3D printers with adjustable optical path provided by this utility model solves the problems of complex component installation and non-interchangeability in the prior art by integrating components such as laser emitter, total reflection mirror, and beam shaper into the same adjustable reference platform. It significantly improves the universality of parts and the convenience of spare parts management, simplifies the assembly process, and reduces maintenance costs.

[0024] Secondly, based on the design of the angle adjustment module and height adjustment module of the total reflection mirror, the laser module has high flexibility and precision in optical path adjustment; and, through the design of the 5-hole combination hole on the mounting base plate, different optical path directions can be set in the same mounting position, reducing the disassembly and assembly work during optical path conversion and significantly improving the efficiency of optical path modification.

[0025] In addition, the laser power detection device is equipped with a drive component and a rotating component, which can flexibly enter and exit the optical path and achieve rotation around the axis. This solves the limitations of the existing laser power detection device, which is fixedly installed and exposed to the optical path for a long time, and also realizes real-time online monitoring of laser power.

[0026] Finally, the first and second reinforcing plates equipped with the mounting base plate improve the adaptability of the installation through the design of waist-shaped stepped holes and matrix screw holes, which first disperses and then transmits stress, thereby enhancing the stability of the structure. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the mounting base plate hole positions provided in Embodiment 1 of this utility model;

[0029] Figure 2 This is a schematic diagram of the assembly of a laser module for a photopolymerization 3D printer with an adjustable optical path, provided in Embodiment 1 of this utility model.

[0030] Figure 3 This is a schematic diagram of the mounting base plate structure provided in Embodiment 1 of this utility model;

[0031] Figure 4 A cross-sectional view of the first waist-shaped stepped hole assembly state provided in Embodiment 1 of this utility model;

[0032] Figure 5 This is a schematic diagram of the total reflection mirror structure provided in Embodiment 1 of this utility model;

[0033] Figure 6 This is a schematic diagram of the angle adjustment module and mirror mount assembly provided in Embodiment 1 of this utility model;

[0034] Figure 7 This is a schematic diagram of the height adjustment module structure provided in Embodiment 1 of this utility model;

[0035] Figure 8 This is a schematic diagram of the 5-hole combined hole structure provided in Embodiment 1 of this utility model;

[0036] Figure 9 This is a schematic diagram of the laser power detection device provided in Embodiment 1 of this utility model;

[0037] Figure 10 This is a schematic diagram of the rotating component structure provided in Embodiment 1 of this utility model.

[0038] Figure label:

[0039] 100 - Mounting base plate; 110 - First hole array; 120 - Second hole array; 130 - 5-hole combination hole; 140 - Double hole group; 150 - Clearance area; 160 - First reinforcing plate; 161 - First waist-shaped stepped hole; 162 - Linear screw hole group; 170 - Second reinforcing plate; 171 - Window; 172 - Second waist-shaped stepped hole; 173 - Matrix screw hole group; 180 - Cable management port; 200 - Laser emitter; 300 - Total reflection mirror; 310 - Mirror base; 320-Mirror body; 330-Angle adjustment module; 331-Base plate; 332-Adjusting screw; 340-Height adjustment module; 341-Base plate; 342-Upright plate; 400-Laser power detection device; 410-Mounting base; 420-Electrical integrated box; 430-Drive assembly; 440-Detection assembly; 450-Rotation assembly; 451-Base; 452-Base plate; 453-Gear plate; 454-Coaxial fastener; 500-Beam shaper. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "middle," "central," "both sides," "back side," "top," "bottom," "periphery," and "long axis direction," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] Example 1

[0043] This embodiment provides a laser module for a photopolymerization 3D printer with an adjustable optical path. (See reference...) Figure 1 As shown, it includes a mounting base plate 100 with a first hole array 110, a second hole array 120, and several 5-hole combination holes 130 and double hole groups 140.

[0044] See Figure 2 As shown, a laser emitter 200 is provided at the first aperture array 110, a beam shaper 500 is provided at the second aperture array 120, a total reflection mirror 300 is provided at the five-aperture combination aperture 130, and a laser power detection device 400 is provided at the dual-aperture group 140; a clearance area 150 is also provided in the second aperture array 120 for the beam shaper 500 to propagate the laser beam.

[0045] In this implementation, refer to Figure 3 As shown, the mounting base plate 100 also includes a first reinforcing plate 160 and a second reinforcing plate 170;

[0046] The first reinforcing plate 160 has several sets of first waist-shaped stepped holes 161 in the middle region, and linear screw hole groups 162 are provided on both sides.

[0047] During assembly, align the first waist-shaped stepped hole 161 with the corresponding hole in the first hole array 110, and then use threaded fasteners to fix the first reinforcing plate 160 onto the mounting base plate 100. After tightening, refer to... Figure 4 As shown, the head of the threaded fastener is recessed into the first stage hole of the first waist-shaped stepped hole 161 and does not protrude from the top plane of the first reinforcing plate 160.

[0048] Furthermore, the mounting holes of the laser emitter 200 are aligned with the matching screw holes in the linear screw hole group 162, and a threaded fastener is used to achieve a secure installation.

[0049] The second reinforcing plate 170 has a window 171 in the middle, and a second waist-shaped stepped hole 172 and a matrix screw hole group 173 are provided on both sides of the window 171 in sequence. The projected area of ​​the window 171 is not less than the projected area of ​​the avoidance area 150 and not more than 30% of the projected area of ​​the second reinforcing plate 170.

[0050] During specific assembly, the second waist-shaped stepped hole 172 is aligned with the matching hole on the second hole array 120, and bolt fasteners are used to achieve fastening. Similarly, after fastening, the head of the bolt fastener is sunk into the second waist-shaped stepped hole 172 and does not protrude from the top plane of the second reinforcing plate 170.

[0051] Next, align the mounting holes of the beam shaper 500 with the matching screw holes in the matrix screw hole group 173, and use threaded fasteners to tighten them, thus completing the installation.

[0052] Even better, the two sets of first waist-shaped stepped holes 161 or second waist-shaped stepped holes 172 that are adjacent in the long axis direction are staggered with each other, which can accommodate more bottom plate hole positions when the same number of stepped holes are opened.

[0053] In this embodiment, the first reinforcing plate 160 and the second reinforcing plate 170 not only take into account the compatibility of different specifications of laser emitters 200 or beam shapers 500 with the mounting holes of the mounting base plate 100, but also can disperse the force before transferring it to the mounting base plate 100, avoiding stress concentration at the holes during direct installation, and providing reinforcement and buffering effects.

[0054] In this embodiment, refer to Figure 5 As shown, the total reflection mirror 300 includes a mirror base 310, a mirror body 320, an angle adjustment module 330, and a height adjustment module 340;

[0055] Specifically, the mirror body 320 is located in the middle of the mirror base 310;

[0056] See Figure 6 As shown, the angle adjustment module 330 is spring-loaded on the back of the mirror base 310, and there is a gap between it and the mirror base 310;

[0057] Preferably, the angle adjustment module 330 includes a base plate 331 and three adjustment screws 332. The adjustment screws 332 pass through the base plate 331 and abut against the three corners of the back of the mirror base 310, forming a triangular position.

[0058] In practical use, turning the head of the adjusting screw 332 can screw it in or out relative to the lens mount 310, thereby lifting or lowering the corresponding corner of the lens mount 310, causing the lens body 320 to tilt in a direction symmetrical to the center of that corner, thereby adjusting the angle of the lens body 320 and ultimately achieving fine-tuning of the optical path.

[0059] More preferably, the portion of the adjusting screw 332 located in the gap between the mirror base 310 and the angle adjustment module 330 is fitted with a spring, which makes the angle adjustment process more stable and controllable.

[0060] The height adjustment module 340 is located below the mirror base 310 and the angle adjustment module 330. Its bottom is connected and fixed to the mounting base plate 100, and its top passes through the gap between the mirror base 310 and the angle adjustment module 330 and is connected and fixed to the angle adjustment module 330.

[0061] For details, please refer to Figure 7 As shown, the height adjustment module 340 includes a base plate 341 and a vertical plate 342 that are perpendicular to each other and form an L-shaped structure. Both the base plate 341 and the vertical plate 342 are provided with waist-shaped holes. The length of the top end of the vertical plate 342 is less than the length of the bottom end, and the thickness is less than the width of the gap between the mirror base 310 and the angle adjustment module 330.

[0062] Even better, the waist-shaped hole on the upright plate 342 is a stepped hole, so that the head of the threaded fastener can be sunk into the stepped hole during use without taking up extra gap space.

[0063] In this implementation, refer to Figure 8 As shown, the 5-hole combination hole 130 includes a reuse hole 131, a first auxiliary hole pair 132, and a second auxiliary hole pair 133. The reuse hole 131 is collinear with the first auxiliary hole pair 132 and the second auxiliary hole pair 133, respectively. The included angle between the first auxiliary hole pair 132 and the second auxiliary hole pair 133 is 30°.

[0064] In specific processing, the design of the 5-hole combination hole 130 can realize the installation of two different orientations in one installation position to meet the setting requirements of different optical path directions under the same optical path. In addition, the design of the reuse hole 131 also reduces the disassembly and assembly work when changing the optical path direction. Only the fastener part at the reuse hole 131 needs to be loosened, without the need to completely disassemble it, which effectively improves the efficiency of optical path modification.

[0065] See Figure 9As shown, the laser power detection device 400 includes a mounting base 410, an electrical integration box 420, a driving component 430, and a detection component 440. The bottom of the mounting base 410 is connected and fixed to the mounting base plate 100, and the electrical integration box 420 and the driving component 430 are installed on the upper part. The driving component 430 is a pen-shaped cylinder, the end of which is connected to the detection component 440 and can drive the detection component 440 into or out of the optical path.

[0066] More preferably, the laser power detection device 400 further includes a rotating component 450, one end of which is threadedly connected to the driving component 430 and the other end is connected to the detection component 440, for controlling the detection component 440 to rotate around the axis in the axial direction of the rotating component 450;

[0067] For details, please refer to Figure 10 As shown, the rotating assembly 450 includes a base 451, a base plate 452, a gear plate 453, and a coaxial fixing member 454. The base 451, the base plate 452, and the gear plate 453 are coaxially assembled in sequence through the coaxial fixing member 454. The side of the gear plate 453 near the base plate 452 has teeth arranged in a circumferential array around the axis. The gear plate 453 can rotate relative to the base plate 452.

[0068] In this embodiment, preferably, the mounting base plate 100 is also provided with a cable management port 180 around its perimeter, which facilitates the organization of equipment cables into one unit and then integrates them with the whole machine, avoiding interference with the optical path.

[0069] In this embodiment, during assembly, the first reinforcing plate 160 and the second reinforcing plate 170 are first aligned with the matching holes in the first aperture array 110 and the second aperture array 120, respectively, and then fastened with bolts. The laser emitter 200 and the beam shaper 500 are then installed and fixed onto the first reinforcing plate 160 and the second reinforcing plate 170, respectively. Furthermore, according to the optical path design requirements, a suitable 5-hole combination hole 130 mounting position is selected to install the total reflection mirror 300, and a suitable dual-hole group 140 is selected to install the laser power detection device 400. The optical path is then finely adjusted through the angle adjustment module 330 and the height adjustment module 340 to ensure that the laser reflected by the last total reflection mirror 300 can enter the acquisition window of the beam shaper 500.

[0070] Although this document frequently uses terms such as laser module, mounting base plate, laser emitter, total reflection mirror, beam shaper, first aperture array, second aperture array, 5-hole combination aperture, double aperture group, clearance area, first reinforcing plate, first waist-shaped stepped aperture, linear screw hole group, second reinforcing plate, window, second waist-shaped stepped aperture, matrix screw hole group, multiplexed hole, first auxiliary hole pair, second auxiliary hole pair, cable management port, mirror mount, mirror body, angle adjustment module, height adjustment module, substrate, adjustment screw, base plate, upright plate, mounting base, electrical integration box, drive assembly, detection assembly, rotating assembly, base, base plate, gear plate, coaxial fastener, gap, corner, waist-shaped hole, stepped hole, primary hole, screw hole, threaded fastener, optical path, optical path, acquisition window, and mounting position, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A laser module for a photopolymerization 3D printer with adjustable optical path, characterized in that: It includes a mounting base plate (100) having a first hole array (110), a second hole array (120), and several 5-hole combination holes (130) and double hole groups (140). The first aperture array (110) is equipped with a laser emitter (200), the second aperture array (120) is equipped with a beam shaper (500), the five-aperture combination aperture (130) is equipped with a total reflection mirror (300), and the double aperture group (140) is equipped with a laser power detection device (400). The second aperture array (120) also has a recess area (150) for the beam shaper (500) to propagate the laser beam; The total reflection mirror (300) includes a mirror mount (310), a mirror body (320), an angle adjustment module (330), and a height adjustment module (340). The mirror body (320) is located in the middle of the mirror base (310); The angle adjustment module (330) is spring-loaded on the back of the mirror base (310) and has a gap with the mirror base (310); The height adjustment module (340) is located below the mirror base (310) and the angle adjustment module (330). Its bottom is connected and fixed to the mounting base plate (100), and its top passes through the gap between the mirror base (310) and the angle adjustment module (330) and is connected and fixed to the angle adjustment module (330). The laser power detection device (400) includes a mounting base (410), an electrical integration box (420), a driving component (430), and a detection component (440). The bottom of the mounting base (410) is connected and fixed to the mounting base plate (100), and the electrical integration box (420) and the driving component (430) are installed on the upper part. The end of the driving component (430) is connected to the detection component (440) and can drive the detection component (440) to enter or leave the optical path.

2. The laser module for a photopolymerization 3D printer with adjustable optical path according to claim 1, characterized in that: The mounting base plate (100) also includes a first reinforcing plate (160); The first reinforcing plate (160) has several sets of first waist-shaped stepped holes (161) in the middle region and linear screw hole groups (162) in the two side regions respectively.

3. The laser module for a photopolymerization 3D printer with adjustable optical path according to claim 1, characterized in that: The mounting base plate (100) also includes a second reinforcing plate (170). The second reinforcing plate (170) has a window (171) in the middle, and the window (171) has a second waist-shaped stepped hole (172) and a matrix screw hole group (173) on both sides.

4. The laser module for a photopolymerization 3D printer with adjustable optical path according to claim 2, characterized in that: The two adjacent sets of the first waist-shaped stepped holes (161) in the long axis direction are staggered.

5. The laser module for a photopolymerization 3D printer with adjustable optical path according to claim 3, characterized in that: The two adjacent sets of the second waist-shaped stepped holes (172) in the long axis direction are misaligned with each other.

6. The laser module for a photopolymerization 3D printer with adjustable optical path according to claim 3, characterized in that: The projected area of ​​the window (171) is not less than the projected area of ​​the avoidance area (150) and not more than 30% of the projected area of ​​the second reinforcing plate (170).

7. The laser module for a photopolymerization 3D printer with adjustable optical path according to claim 1, characterized in that: The angle adjustment module (330) includes a base plate (331) and at least one adjustment screw (332); The adjusting screw (332) passes through the substrate (331) and abuts against any corner of the back of the mirror base (310).

8. The laser module for a photopolymerization 3D printer with adjustable optical path according to claim 7, characterized in that: The portion of the adjusting screw (332) located in the gap between the mirror base (310) and the angle adjustment module (330) is fitted with a spring.

9. The laser module for a photopolymerization 3D printer with adjustable optical path according to claim 1, characterized in that: The height adjustment module (340) includes a base plate (341) and a vertical plate (342) that are perpendicular to each other and form an L-shaped structure. Both the base plate (341) and the upright plate (342) are provided with waist-shaped holes.

10. The laser module for a photopolymerization 3D printer with adjustable optical path according to claim 9, characterized in that: The length of the top end of the upright plate (342) is less than the length of the bottom end, and the thickness is less than the width of the gap between the mirror base (310) and the angle adjustment module (330).

11. The laser module for a photopolymerization 3D printer with adjustable optical path according to claim 9, characterized in that: The 5-hole combination hole (130) includes a reuse hole (131), a first pair of holes (132), and a second pair of holes (133). The reuse hole (131) is collinear with the first auxiliary hole pair (132) and the second auxiliary hole pair (133), respectively, and the included angle between the first auxiliary hole pair (132) and the second auxiliary hole pair (133) is 30° ~ 45°.

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