A 3D printer projector light correction device

Abstract

This utility model relates to the field of 3D printing technology, and more particularly to a lighting correction device for a 3D printer projector. The utility model includes a base, a concave plate, a projector, and a connecting plate. The concave plate is fixed to one end of the top of the base, and the projector is fixed to the top of the concave plate. The connecting plate is fixed to the other end of the top of the base. A vibration damping structure is slidably connected to the inner side of the connecting plate, and a position adjustment structure is provided on the inner side of the connecting plate. A fixing plate is fixed to one side of the position adjustment structure, and multiple grids are provided on one side of the fixing plate. The lighting correction device for a 3D printer projector provided by this utility model improves the safety of the device through the design of the vibration damping structure. Vibrations caused by motor operation and platform lifting may lead to slight movements in the projector position, resulting in offset or intensity fluctuations in the lighting pattern. The damping vibration damping structure absorbs vibration energy, maintains projector stability, and ensures the consistency of the lighting pattern during each cured layer.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a light correction device for a 3D printer projector. Background Technology

[0002] In 3D printing technology, the projector is a key component, and the uniformity and accuracy of its illumination play a decisive role in print quality. The projector in a 3D printer guides materials such as photosensitive resin to solidify layer by layer by projecting specific patterns or light. The intensity, uniformity, and accuracy of the projection angle of the light directly affect the precision, surface quality, and success rate of the 3D printed model. To ensure that the light projected by the projector meets the high precision requirements of 3D printing, a specialized calibration device is needed for optimization and adjustment. By precisely adjusting parameters such as the projector's light intensity distribution, light spot shape, and projection angle, the illumination calibration device can effectively improve the uniformity and stability of the illumination, reducing problems such as insufficient or over-curing of the model due to uneven illumination. This improves the overall quality and efficiency of 3D printing and ensures the reliability and consistency of the printing process.

[0003] For example, Chinese utility model patent (CN209176181U) discloses a light correction device for a projector of a photopolymer 3D printer, which solves the following problems: due to the uneven illumination of the projector in its projection area, some areas of the projection area have high brightness and some areas have low brightness; high brightness will cause the photosensitive resin to be over-cured, and over-curing will make the model too large; low brightness will cause the photosensitive resin to be incompletely cured and unable to form, resulting in inconsistent printed model size or printing failure.

[0004] The device includes a projector that projects an image mask with a multi-row, multi-column grid within its projection area; and an illumination detection mechanism that includes multiple illumination sensors for detecting the illumination intensity of each grid, and a drive assembly for driving the multiple illumination sensors to move along the row / column direction of the grid. The multiple illumination sensors are arranged along the column / row direction of the grid, and the number of illumination sensors is consistent with the number of rows / columns of the grid.

[0005] When using the above technology, the following technical problems were found in the existing technology: the device can only move left and right, but cannot move up and down, and cannot detect and correct the light intensity at different height levels. This may result in uneven lighting at different height levels, which will affect the curing effect of each layer of photosensitive resin and ultimately lead to a decrease in the accuracy and surface quality of the printed model. To address this, we designed a 3D printer projector light correction device to provide another technical solution to the above technical problems. Utility Model Content

[0006] Therefore, it is necessary to provide a 3D printer projector illumination correction device to address the aforementioned technical problems.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A 3D printer projector illumination correction device includes a base, a concave plate, a projector, and a connecting plate. The concave plate is fixed to one end of the top of the base, and the projector is fixed to the top of the concave plate. The connecting plate is fixed to the other end of the top of the base. A vibration damping structure is slidably connected to the inner side of the connecting plate. A position adjustment structure is provided on the inner side of the connecting plate. A fixing plate is fixed to one side of the position adjustment structure. Multiple grids are provided on one side of the fixing plate.

[0009] As a preferred embodiment of the 3D printer projector illumination correction device provided by this utility model, the position adjustment structure includes an X-axis moving mechanism and a Y-axis moving mechanism.

[0010] As a preferred embodiment of the 3D printer projector illumination correction device provided by this utility model, the Y-axis moving mechanism includes a first slider, a first motor, a first screw, and a sliding shaft. The first slider is slidably connected to the inner sides of the top and bottom of the connecting plate. The first screw is rotatably connected to the side of the two first sliders that are close to each other. The sliding shaft is threadedly connected to the outer side of the first screw. The first motor is fixed to the top of one of the first sliders, and the output end of the first motor is fixed to the first screw.

[0011] As a preferred embodiment of the 3D printer projector illumination correction device provided by this utility model, the X-axis moving mechanism includes a second slider, a second motor, and a second screw. The inner sides of both ends of the connecting plate are slidably connected to the second sliders. The two second sliders are rotatably connected to the side of each other. The outer side of the second screw is threadedly connected to the sliding shaft. One side of one of the second sliders is fixed to the second motor. The output end of the second motor is fixed to the second screw.

[0012] As a preferred embodiment of the 3D printer projector illumination correction device provided by this utility model, the vibration damping structure includes a first limiting block, a first sliding rod, and a first spring. A first limiting block is fixed to one side of each of the two first sliding blocks. A first sliding rod is slidably connected to the inner side of each of the two first limiting blocks. Both of the two first sliding rods are fixed to a connecting plate. A first spring is sleeved and connected to both ends of the outer side of each of the first sliding rods. The side of the two first springs that are close to each other is fixed to the first limiting block, and the side of the two first springs that are far apart from each other is fixed to the connecting plate.

[0013] As a preferred embodiment of the 3D printer projector illumination correction device provided by this utility model, the vibration damping structure further includes a second limiting block, a second sliding rod, and a second spring. A second limiting block is fixed to one side of each of the two second sliding blocks, and a second sliding rod is slidably connected to the inner side of each of the two second limiting blocks. Both of the two second sliding rods are fixed to a connecting plate, and a second spring is sleeved and connected to both ends of the outer side of each of the second sliding rods. The side of the two second springs that are close to each other is fixed to the second limiting block, and the side of the two second springs that are far apart from each other is fixed to the connecting plate.

[0014] In a preferred embodiment of the 3D printer projector illumination correction device provided by this utility model, multiple third springs are fixed on both sides and both ends of the inner side of the connecting plate, and a friction block is fixed on one side of each of the multiple third springs. The multiple friction blocks are slidably connected to the connecting plate.

[0015] In a preferred embodiment of the 3D printer projector illumination correction device provided by this utility model, a plurality of first limiting blocks and second limiting blocks are slidably connected to a plurality of friction blocks respectively.

[0016] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0017] At the same time, through the above technical solutions, this utility model has at least the following beneficial effects:

[0018] This utility model provides a 3D printer projector illumination correction device. The device improves safety through the design of a vibration damping structure. The operation of the motor, the lifting of the platform and other actions may generate vibration, which may cause slight movement of the projector position, thereby causing the illumination pattern to shift or the intensity to fluctuate. The damping vibration damping structure can absorb the vibration energy, keep the projector stable, and ensure the consistency of the illumination pattern when each layer is cured.

[0019] The device, through its position adjustment structure, allows for precise adjustment of the projector's projection position via horizontal and vertical movement. This ensures uniform illumination of the printing platform. When printing models of different sizes or shapes, the device can precisely align the light center with the model's coordinates, preventing incomplete or excessive edge curing due to light offset. This reduces issues such as model deformation and dimensional deviations. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0021] Figure 1 This is a schematic diagram of the overall structure of a 3D printer projector illumination correction device according to the present invention;

[0022] Figure 2 This is a side view of a 3D printer projector illumination correction device according to the present invention;

[0023] Figure 3 This is a cross-sectional view of a connecting plate for a 3D printer projector illumination correction device according to the present invention.

[0024] Figure 4 This is a schematic diagram showing the connection between the first screw and the sliding shaft of a 3D printer projector illumination correction device according to this utility model;

[0025] Figure 5 This is a schematic diagram showing the connection between the sliding shaft and the second screw of the illumination correction device for a 3D printer projector according to this utility model.

[0026] In the diagram: 1. Base; 2. Concave plate; 3. Projector; 4. Connecting plate; 5. First slider; 6. First motor; 7. First screw; 8. Sliding shaft; 9. Second slider; 10. Second motor; 11. Second screw; 12. First limiting block; 13. First sliding rod; 14. First spring; 15. Second limiting block; 16. Second sliding rod; 17. Second spring; 18. Friction block; 19. Third spring; 20. Fixing plate; 21. Mesh. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] As described in the background art, the device can only move left and right, but cannot move up and down. It cannot detect and correct the light intensity at different height levels, which may result in uneven lighting at different height levels, thus affecting the curing effect of each layer of photosensitive resin, and ultimately leading to a decrease in the accuracy and surface quality of the printed model.

[0029] To solve this technical problem, this utility model provides a 3D printer projector illumination correction device.

[0030] For details, please refer to Figures 1-5 A 3D printer projector illumination correction device specifically includes: a base 1, a concave plate 2, a projector 3, and a connecting plate 4. The concave plate 2 is fixed to one end of the top of the base 1, the projector 3 is fixed to the top of the concave plate 2, and the connecting plate 4 is fixed to the other end of the top of the base 1. A vibration damping structure is slidably connected to the inner side of the connecting plate 4, and a position adjustment structure is provided on the inner side of the connecting plate 4. A fixing plate 20 is fixed to one side of the position adjustment structure, and multiple grids 21 are provided on one side of the fixing plate 20.

[0031] This utility model provides a 3D printer projector illumination correction device. The device improves safety through the design of a vibration damping structure. The operation of the motor, the lifting of the platform and other actions may generate vibration, which may cause slight movement of the projector position, thereby causing the illumination pattern to shift or the intensity to fluctuate. The damping vibration damping structure can absorb the vibration energy, keep the projector stable, and ensure the consistency of the illumination pattern when each layer is cured.

[0032] The device, through its position adjustment structure, allows for precise adjustment of the projector's projection position via horizontal and vertical movement. This ensures uniform illumination of the printing platform. When printing models of different sizes or shapes, the device can precisely align the light center with the model's coordinates, preventing incomplete or excessive edge curing due to light offset. This reduces issues such as model deformation and dimensional deviations.

[0033] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] Reference Figures 1-5 A 3D printer projector illumination correction device includes a base 1, a concave plate 2, a projector 3, and a connecting plate 4. The concave plate 2 is fixed to one end of the top of the base 1, the projector 3 is fixed to the top of the concave plate 2, and the connecting plate 4 is fixed to the other end of the top of the base 1. A vibration damping structure is slidably connected to the inner side of the connecting plate 4, and a position adjustment structure is provided on the inner side of the connecting plate 4. A fixing plate 20 is fixed to one side of the position adjustment structure, and multiple grids 21 are provided on one side of the fixing plate 20.

[0036] The position adjustment structure includes an X-axis moving mechanism and a Y-axis moving mechanism. The Y-axis moving mechanism includes a first slider 5, a first motor 6, a first screw 7, and a sliding shaft 8. The first slider 5 is slidably connected to the inner sides of the top and bottom of the connecting plate 4. The first screw 7 is rotatably connected to the side of the two first sliders 5 that are close to each other. The sliding shaft 8 is threadedly connected to the outer side of the first screw 7. The first motor 6 is fixed to the top of one of the first sliders 5. The output end of the first motor 6 is fixed to the first screw 7. The X-axis moving mechanism includes a second slider 9, a second motor 10, and a second screw 11. The second slider 9 is slidably connected to the inner sides of both ends of the connecting plate 4. The second screw 11 is rotatably connected to the side of the two second sliders 9 that are close to each other. The outer side of the second screw 11 is threadedly connected to the sliding shaft 8. The second motor 10 is fixed to one side of one of the second sliders 9. The output end of the second motor 10 is fixed to the second screw 11, so that the sliding shaft 8 can move back and forth and left and right.

[0037] The vibration damping structure includes a first limiting block 12, a first sliding rod 13, a first spring 14, a second limiting block 15, a second sliding rod 16, and a second spring 17. A first limiting block 12 is fixed to one side of each of the two first sliding blocks 5. A first sliding rod 13 is slidably connected to the inner side of each of the two first limiting blocks 12. Both first sliding rods 13 are fixed to the connecting plate 4. A first spring 14 is sleeved and connected to both ends of the outer side of each first sliding rod 13. The side of the two first springs 14 closest to each other is fixed to the first limiting block 12. The two slide blocks 9 are fixed to the connecting plate 4 on opposite sides. A second limiting block 15 is fixed to one side of each of the two second sliding blocks 9. A second slide rod 16 is slidably connected to the inner side of each of the two second limiting blocks 15. Both second slide rods 16 are fixed to the connecting plate 4. A second spring 17 is sleeved and connected to both ends of the outer side of the second slide rod 16. The side of the two second springs 17 that is close to each other is fixed to the second limiting block 15. The side of the two second springs 17 that is far apart from each other is fixed to the connecting plate 4, so that the vibration reduction structure can provide a damping effect.

[0038] Multiple third springs 19 are fixed on both sides and both ends of the inner side of the connecting plate 4. A friction block 18 is fixed on one side of each of the multiple third springs 19. The multiple friction blocks 18 are slidably connected to the connecting plate 4, so that the friction blocks 18 can slide on the inner side of the connecting plate 4.

[0039] Multiple first limiting blocks 12 and second limiting blocks 15 are slidably connected to multiple friction blocks 18, so that the friction blocks 18 can provide a damping effect for the movement of the first limiting blocks 12 and the second limiting blocks 15.

[0040] Both the first slider 5 and the second motor 10 have the ability to self-lock when power is off, so that the stroke of the device can be locked and controlled. A light source sensor is provided on one side of the concave plate 2, model number: MAC112D-2-HD-4-C / 1309.

[0041] This utility model provides a 3D printer projector illumination correction device. The device improves safety through the design of a vibration damping structure. The operation of the motor, the lifting of the platform and other actions may generate vibration, which may cause slight movement of the projector position, thereby causing the illumination pattern to shift or the intensity to fluctuate. The damping vibration damping structure can absorb the vibration energy, keep the projector stable, and ensure the consistency of the illumination pattern when each layer is cured.

[0042] The device, through its position adjustment structure, allows for precise adjustment of the projector's projection position via horizontal and vertical movement. This ensures uniform illumination of the printing platform. When printing models of different sizes or shapes, the device can precisely align the light center with the model's coordinates, preventing incomplete or excessive edge curing due to light offset. This reduces issues such as model deformation and dimensional deviations.

[0043] The usage process of the 3D printer projector illumination correction device provided by this utility model is as follows: The user powers on the projector 3, and then illuminates one side of the fixed plate 20. When it is necessary to adjust the X position of the fixed plate 20, the user powers on the second motor 10 to rotate. The output end of the second motor 10 drives the second screw 11 to rotate. Since the outer thread of the second screw 11 is connected to the sliding shaft 8, the sliding shaft 8 moves laterally. The movement of the sliding shaft 8 drives the first slider 5, the first motor 6, the first screw 7, and the first limit block 12 to move, thereby causing multiple... When the slide bar 13 is stretched or compressed, the slide shaft 8 will not suddenly accelerate during movement. Similarly, when the Y position of the fixed plate 20 needs to be adjusted, the user energizes the first motor 6 to rotate. The output end of the first motor 6 drives the first screw 7 to rotate. Since the slide shaft 8 is connected to the outer thread of the first screw 7, the rotation of the first screw 7 causes the slide shaft 8 to move longitudinally. The movement of the slide shaft 8 causes the second slider 9, the second motor 10, the second screw 11, and the second limit block 15 to move longitudinally, thereby enabling the slide shaft 8 to move left, right, up, and down, thus enabling the device to dynamically adjust. The device ensures uniform illumination, preventing localized overexposure or underexposure; it adapts to different printing sizes and materials, is compatible with various devices, simplifies calibration processes, and reduces maintenance costs; it improves model detail accuracy and supports the molding of complex structures; it balances light source loss, extends equipment life, reduces printing failures, and improves production efficiency. When the device is adjusted, the movement of the second limiting block 15 and the first limiting block 12 can slide multiple friction blocks 18, thereby pushing multiple third springs 19 to slide inwards towards the connecting plate 4, thus counteracting the effects of the first spring 14 and the second spring 17. The vibration has a good damping effect. At this time, the projector 3 projects a grid pattern. The sensor detects the light intensity of each grid 21. If the light is too strong, the gray value of the grid 21 is increased to weaken the light; if the light is too weak, the gray value is decreased to strengthen the light. The first motor 6 and the second motor 10 adjust each grid 21 column by column until the light intensity of all grids 21 is consistent. In summary, this utility model effectively solves the problems of calibration difficulties in the prior art and achieves beneficial effects such as adjusting the uniformity of illumination, improving equipment compatibility, simplifying the calibration process, and improving printing accuracy and efficiency. This utility model has a reasonable structural design, strong practicality, and broad application prospects and promotional value.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A 3D printer projector illumination correction device, comprising a base (1), a concave plate (2), a projector (3), and a connecting plate (4), wherein the concave plate (2) is fixed to one end of the top of the base (1), the projector (3) is fixed to the top of the concave plate (2), and the connecting plate (4) is fixed to the other end of the top of the base (1), characterized in that, The inner side of the connecting plate (4) is slidably connected with a vibration damping structure, and the inner side of the connecting plate (4) is provided with a position adjustment structure. A fixing plate (20) is fixed on one side of the position adjustment structure, and a plurality of grids (21) are provided on one side of the fixing plate (20).

2. The illumination correction device for a 3D printer projector according to claim 1, characterized in that, The position adjustment structure includes an X-axis moving mechanism and a Y-axis moving mechanism.

3. The illumination correction device for a 3D printer projector according to claim 2, characterized in that, The Y-axis moving mechanism includes a first slider (5), a first motor (6), a first screw (7), and a sliding shaft (8). The first slider (5) is slidably connected to the inner sides of the top and bottom of the connecting plate (4). The first screw (7) is rotatably connected to the side of the two first sliders (5) that are close to each other. The sliding shaft (8) is threadedly connected to the outer side of the first screw (7). The first motor (6) is fixed to the top of one of the first sliders (5). The output end of the first motor (6) is fixed to the first screw (7).

4. The 3D printer projector illumination correction device according to claim 3, characterized in that, The X-axis moving mechanism includes a second slider (9), a second motor (10), and a second screw (11). The inner sides of both ends of the connecting plate (4) are slidably connected to the second slider (9). The two second sliders (9) are rotatably connected to the side of each other. The outer side of the second screw (11) is threadedly connected to the sliding shaft (8). The second motor (10) is fixed to one side of one of the second sliders (9). The output end of the second motor (10) is fixed to the second screw (11).

5. A 3D printer projector illumination correction device according to claim 4, characterized in that, The vibration damping structure includes a first limiting block (12), a first sliding rod (13), and a first spring (14). The first limiting block (12) is fixed on one side of each of the two first sliding blocks (5). The first sliding rod (13) is slidably connected to the inner side of each of the two first limiting blocks (12). The two first sliding rods (13) are fixed to the connecting plate (4). The two outer ends of the first sliding rod (13) are sleeved and connected to the first spring (14). The side of the two first springs (14) that are close to each other is fixed to the first limiting block (12), and the side of the two first springs (14) that are far away from each other is fixed to the connecting plate (4).

6. The illumination correction device for a 3D printer projector according to claim 5, characterized in that, The vibration damping structure also includes a second limiting block (15), a second sliding rod (16), and a second spring (17). The second limiting block (15) is fixed on one side of each of the two second sliding blocks (9). The second sliding rod (16) is slidably connected to the inner side of each of the two second limiting blocks (15). The two second sliding rods (16) are fixed to the connecting plate (4). The two ends of the outer side of the second sliding rod (16) are sleeved and connected to the second spring (17). The side of the two second springs (17) that are close to each other is fixed to the second limiting block (15). The side of the two second springs (17) that are far apart from each other is fixed to the connecting plate (4).

7. A 3D printer projector illumination correction device according to claim 6, characterized in that, Multiple third springs (19) are fixed on both sides and both ends of the inner side of the connecting plate (4). A friction block (18) is fixed on one side of each of the multiple third springs (19). The multiple friction blocks (18) are slidably connected to the connecting plate (4).

8. A 3D printer projector illumination correction device according to claim 7, characterized in that, Multiple first limiting blocks (12) and second limiting blocks (15) are slidably connected to multiple friction blocks (18).

Images