Light source assembly and 3D printer

Abstract

This application provides a light source assembly and a 3D printer. The light source assembly includes a lamp holder, multiple light-emitting elements, and a first lens. The multiple light-emitting elements are arrayed on one side of the lamp holder. The multiple light-emitting elements include multiple first light-emitting groups and multiple second light-emitting groups. Along a first direction, the multiple first light-emitting groups are arranged sequentially at intervals, and a second light-emitting group is provided between any two adjacent first light-emitting groups. Along a second direction, the first light-emitting group includes multiple first light-emitting elements arranged sequentially at intervals, and the second light-emitting group includes multiple second light-emitting elements arranged sequentially at intervals. In the first direction, any second light-emitting element is located between two adjacent first light-emitting elements. The first lens includes a lens base and multiple lens protrusions. The lens base is located on the side of the light-emitting element away from the lamp holder, and the multiple lens protrusions are arrayed on the side of the lens base away from the light-emitting element. The multiple lens protrusions are arranged one-to-one with the multiple light-emitting elements.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and more particularly to a light source assembly and a 3D printer. Background Technology

[0002] Photopolymer 3D printers typically use a light source within a specific wavelength range to irradiate liquid photopolymer resin, triggering a photochemical reaction that solidifies the resin in the irradiated area. Most existing photopolymer 3D printers use a single light source, resulting in poor uniformity of light projected onto the screen assembly, which affects printing accuracy. Utility Model Content

[0003] This application provides a light source assembly and a 3D printer to solve the problem of poor printing accuracy caused by using a single light source in known technologies.

[0004] This application provides a light source assembly, including a lamp holder, a plurality of light-emitting elements, and a first lens. The plurality of light-emitting elements are arrayed on one side of the lamp holder. The plurality of light-emitting elements include a plurality of first light-emitting groups and a plurality of second light-emitting groups. Along a first direction, the plurality of first light-emitting groups are arranged at intervals, and a second light-emitting group is provided between any two adjacent first light-emitting groups. Along a second direction, the first light-emitting group includes a plurality of first light-emitting elements arranged at intervals, and the second light-emitting group includes a plurality of second light-emitting elements arranged at intervals. The second direction intersects the first direction. In particular, along the first direction, any second light-emitting element is located between two adjacent first light-emitting elements. The first lens includes a lens base and a plurality of lens protrusions. The lens base is located on the side of the light-emitting elements away from the lamp holder, and the plurality of lens protrusions are arrayed on the side of the lens base away from the light-emitting elements. The plurality of lens protrusions are arranged one-to-one with the plurality of light-emitting elements.

[0005] In one possible implementation, along a third direction, any one of the light-emitting elements forms a first projection on the lamp holder, and any one of the lens protrusions forms a second projection on the lamp holder. The first projection is located within the area of ​​its corresponding second projection, and the third direction is parallel to the normal direction of the plane containing the first direction and the second direction.

[0006] In one possible implementation, the center points of the first projection and the second projection are set to coincide.

[0007] In one possible implementation, the spacing between any two adjacent first light-emitting groups is the same, and the spacing between any two adjacent first light-emitting elements in the first light-emitting group is the same.

[0008] The spacing between any two adjacent second light-emitting groups is the same, and the spacing between any two adjacent second light-emitting elements in the second light-emitting group is the same.

[0009] In one possible implementation, the number of first light-emitting elements in the plurality of first light-emitting groups is greater than the number of second light-emitting elements in the plurality of second light-emitting groups;

[0010] The sum of the projected areas of the first projections of the first light-emitting elements in the plurality of first light-emitting groups is greater than the sum of the projected areas of the second projections of the second light-emitting elements in the plurality of second light-emitting groups.

[0011] In one possible implementation, the lens protrusion extends from the surface of the lens base away from the light-emitting element toward the side away from the light-emitting element, and the end face of the lens protrusion away from the lens base is curved.

[0012] In one possible implementation, the light source assembly further includes a second lens disposed between the light-emitting element and the lens base, with one end of the light-emitting element away from the lamp holder abutting against the second lens.

[0013] In one possible implementation, the light source assembly further includes a light-shielding member, which is provided on the light emission path of each of the first light-emitting elements and each of the second light-emitting elements. The outer contour of the light-shielding member extends beyond the outer contours of the first light-emitting element and the second light-emitting element, so that any one of the first light-emitting elements is spaced apart from the adjacent second light-emitting element or the adjacent first light-emitting element.

[0014] In one possible implementation, the light-shielding element is configured as a hexagonal prism structure.

[0015] In one possible implementation, the light source assembly further includes a heat sink disposed on the side of the lamp holder away from the light-emitting element, and the heat sink is thermally coupled to the lamp holder.

[0016] In one possible implementation, the light source assembly further includes a control component that is signal-connected to the plurality of light-emitting elements and is configured to selectively control some of the light-emitting elements to operate.

[0017] This application also provides a 3D printer including the aforementioned light source assembly.

[0018] The light source assembly of this application improves the uniformity of light emitted by the light source assembly by setting multiple arrayed light-emitting elements. Furthermore, this application also sets multiple arrayed lens protrusions, with each lens protrusion corresponding to a different light-emitting element. This ensures that the light emitted by each light-emitting element is projected onto the corresponding lens protrusion, improving the collimation of the light emitted by each element and reducing the divergence angle of each element. This further enhances the collimation of the light emitted by the light source assembly and improves printing accuracy. Moreover, the multiple first and second light-emitting elements in any adjacent first and second light-emitting groups are staggered, creating a honeycomb distribution of the light-emitting elements. Compared to a rectangular distribution, this distribution method avoids noticeable dark lines between the light spots emitted by each element due to light dispersion, which could affect printing accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the 3D printer of this application in one embodiment.

[0020] Figure 2 This is a schematic diagram of the material tray assembly in one embodiment of the 3D printer of this application.

[0021] Figure 3 This is a schematic diagram of the structure of the light source assembly of this application in one embodiment.

[0022] Figure 4 This is a schematic diagram showing the distribution of light-emitting elements in one embodiment of the light source assembly of this application.

[0023] Figure 5 This is a schematic diagram of the layered structure of the light source component of this application in one embodiment.

[0024] Figure 6 This is a schematic diagram showing the distribution of the light-shielding elements in one embodiment of the light source assembly of this application.

[0025] Figure 7 This is a schematic diagram of signal transmission of the light source component of this application in one embodiment.

[0026] Key component symbols: 100, 3D printer; Z, third direction; Y, first direction; X, second direction; 10, platform assembly; 20, control assembly; 30, moving assembly; 40, material tray assembly; 401, material trough; 41, base; 47, screen assembly; 48, light source assembly; 481, heat sink; 482, lamp holder; 483, light-emitting component; 4831, first light-emitting group; 48310, first light-emitting component; 4832, second light-emitting group; 48320, second light-emitting component; 484, second lens; 485, first lens; 4851, lens base; 4852, lens convex part; 486, light shield.

[0027] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0028] The following description will refer to the accompanying drawings to provide a more complete picture of the present application. The drawings illustrate exemplary embodiments of the present application. However, the present application may be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components.

[0029] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to limit the application. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to also include the plural forms. Furthermore, when used herein, “comprising” and / or “including” and / or “having,” integers, steps, operations, components, and / or components, but does not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components, and / or groups thereof.

[0030] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Furthermore, unless expressly defined herein, terms such as those defined in a general dictionary should be interpreted as having the same meaning as they have in the relevant art and in the content of this application, and will not be interpreted as having an idealized or overly formal meaning.

[0031] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0032] like Figures 1 to 2 As shown, this embodiment provides a 3D printer 100, including a platform assembly 10, a material tray assembly 40, a moving assembly 30, and other structures necessary for performing photopolymerization 3D printing. The material tray assembly 40 includes a base 41, a light source assembly 48, and a screen assembly 47.

[0033] For ease of reading, this application introduces the terms third direction Z, first direction Y, and second direction X to describe embodiments of the application. Third direction Z, first direction Y, and second direction X can be three non-parallel straight lines in space; further, third direction Z, first direction Y, and second direction X can be three mutually perpendicular directions in a three-dimensional coordinate system (a three-dimensional Cartesian coordinate system). In subsequent embodiments, the third direction Z is described as the Z-axis direction of the three-dimensional coordinate system, the first direction Y as the Y-axis direction of the three-dimensional coordinate system, and the second direction X as the X-axis direction of the three-dimensional coordinate system.

[0034] Along the third direction Z, the platform component 10 and the base 41 are spaced apart. A material tank 401 is provided on the end face of the base 41 near the platform component 10, used to hold printing consumables such as resin. A light source component 48 and a screen component 47 are installed inside the base 41. The light source component 48 is located below the material tank 401, and the screen component 47 is located between the light source component 48 and the material tank 401. The light emitted by the light source component 48 is adjusted by the screen component 47 and projected onto the resin in the material tank 401, causing the resin to solidify and form a printing layer.

[0035] The heat sink 481 of the light source assembly 48 contacts the base 41 and the two are thermally coupled, so that the heat sink 481 can transfer heat to the base 41, and then the heat sink 48 can dissipate heat from the base 41 through a structure such as a fan to achieve heat dissipation of the light source assembly 48.

[0036] One of the platform assembly 10 and the tray assembly 40 is drivenly connected to the moving assembly 30, so that the moving assembly 30 drives one of the platform assembly 10 and the tray assembly 40 to move relative to the other, thereby achieving layer-by-layer printing. The moving assembly 30 can be a linear motion mechanism such as a lead screw slide.

[0037] like Figures 3 to 4 As shown, this embodiment also provides a light source assembly 48, including a lamp holder 482, a plurality of light-emitting elements 483, and a first lens 485.

[0038] Along the third direction Z, multiple light-emitting elements 483 are arrayed on one side of the lamp holder 482. A circuit module is provided on the lamp holder 482, and the multiple light-emitting elements 483 are electrically connected to the circuit module to power and control each light-emitting element 483 to operate or stop operating. The multiple light-emitting elements 483 include multiple first light-emitting groups 4831 and multiple second light-emitting groups 4832. Along the first direction Y, the multiple first light-emitting groups 4831 are arranged at intervals, and a second light-emitting group 4832 is provided between any two adjacent first light-emitting groups 4831. Along the second direction X, each first light-emitting group 4831 includes multiple first light-emitting elements 48310 arranged at intervals, and each second light-emitting group 4832 includes multiple second light-emitting elements 48320 arranged at intervals. In the first direction Y, any second light-emitting element 48320 is located between two adjacent first light-emitting elements 48310.

[0039] The first lens 485 includes a lens base 4851 and a plurality of lens protrusions 4852. Along the third direction Z, the lens base 4851 is located on the side of the light-emitting element 483 away from the lamp holder 482. The plurality of lens protrusions 4852 are arrayed on the side of the lens base 4851 away from the light-emitting element 483. The plurality of lens protrusions 4852 are arranged one-to-one with the plurality of light-emitting elements 483, so that the light emitted by each light-emitting element 483 is projected onto the corresponding lens protrusion 4852, and the light emitted by each light-emitting element 483 can be straightened by the corresponding lens protrusion 4852, thereby improving the uniformity and collimation of the beam formed by the light emitted by the plurality of light-emitting elements 483.

[0040] Thus, the light source assembly 48 of this application, by providing multiple arrayed light-emitting elements 483, can improve the uniformity of the light emitted by the light source assembly 48. Furthermore, this application also provides multiple arrayed lens protrusions 4852, with each lens protrusion 4852 corresponding to one of the multiple light-emitting elements 483. This ensures that the light emitted by each light-emitting element 483 is projected onto the corresponding lens protrusion 4852, improving the collimation of the light emitted by each light-emitting element 483 and reducing the divergence angle of each light-emitting element 483. This further improves the collimation of the light emitted by the light source assembly 48 and enhances printing accuracy. Furthermore, the multiple first light-emitting elements 48310 and multiple second light-emitting elements 48320 in any adjacent first light-emitting group 4831 and second light-emitting group 4832 are staggered, so that the multiple light-emitting elements 483 are distributed in a honeycomb pattern. Compared with the multiple light-emitting elements 483 being distributed in a rectangular pattern, this distribution method adopted in this application can avoid obvious dark lines between the light spots emitted by each light-emitting element 483 due to the dispersion of light, which would affect the printing accuracy.

[0041] Please combine Figures 3 to 4In one embodiment, the first light-emitting element 48310 and the second light-emitting element 48320 have the same structure and size, and both the first light-emitting element 48310 and the second light-emitting element 48320 are approximately rectangular in shape. It is understood that in other embodiments, the first light-emitting element 48310 and the second light-emitting element 48320 may also be cylindrical or other shapes.

[0042] The spacing between any two adjacent first light-emitting groups 4831 is the same, and the spacing between any two adjacent first light-emitting elements 48310 in the first light-emitting group 4831 is the same, so that the multiple first light-emitting elements 48310 are evenly distributed, ensuring better uniformity of the light spots formed by the light emitted by each first light-emitting element 48310.

[0043] The spacing between any two adjacent second light-emitting groups 4832 is the same, and the spacing between any two adjacent second light-emitting elements 48320 in the second light-emitting group 4832 is the same, so that the multiple second light-emitting elements 48320 are evenly distributed, ensuring better uniformity of the light spots formed by the light emitted by each second light-emitting element 48320.

[0044] Furthermore, along the first direction Y, the spacing between any second light-emitting group 4832 and the two adjacent first light-emitting groups 4831 is the same, and any second light-emitting element 48320 is located in the middle position of the two first light-emitting elements 48310 adjacent to it in its adjacent first light-emitting group 4831, so that the multiple first light-emitting elements 48310 and the multiple second light-emitting elements 48320 are evenly distributed, ensuring better uniformity of the light spots formed by the light emitted by each light-emitting element 483.

[0045] In this embodiment, the number of first light-emitting elements 48310 in each first light-emitting group 4831 is the same, and the number of second light-emitting elements 48320 in each second light-emitting group 4832 is the same. Furthermore, the number of second light-emitting elements 48320 in the second light-emitting group 4832 is one less than the number of first light-emitting elements 48310 in the first light-emitting group 4831.

[0046] Please combine Figures 3 to 4 In one embodiment, both the lamp holder 482 and the lens base 4851 are generally rectangular structures. Along the third direction Z, the lamp holder 482 and the lens base 4851 are spaced apart.

[0047] Along the third direction Z, the lens protrusion 4852 protrudes from the surface of the lens base 4851 on the side away from the light-emitting element 483 toward the side away from the light-emitting element 483. The lens protrusion 4852 and the lens base 4851 are made of the same material, both being light-transmitting materials such as optical glass, and the lens protrusion 4852 and the lens base 4851 are integrally formed. The lens protrusion 4852 is generally curved, and the end face of the lens protrusion 4852 away from the lens base 4851 is curved. When the light emitted from the light-emitting element 483 enters the lens protrusion 4852 and exits from the curved surface of the lens protrusion 4852, the light is straightened by the lens protrusion 4852, thereby improving the collimation of the light emitted from the light-emitting element 483.

[0048] In this embodiment, any one of the light-emitting elements 483 forms a first projection on the lamp holder 482, and any one of the lens protrusions 4852 forms a second projection on the lamp holder 482. The first projection is located within the area of ​​its corresponding second projection, that is, the outer contour of the lens protrusion 4852 extends beyond the outer contour of its corresponding light-emitting element 483, so that the light emitted by the light-emitting element 483 can be straightened by the lens protrusion 4852 more.

[0049] Specifically, the center points of the first projection and the second projection are set to coincide, that is, the optical axis of the light emitted by the light-emitting element 483 coincides with the central axis of the lens protrusion 4852, so as to ensure that the light emitted by the light-emitting element 483 remains a uniform beam after passing through the lens protrusion 4852.

[0050] Furthermore, the number of first light-emitting elements 48310 in the plurality of first light-emitting groups 4831 is greater than the number of second light-emitting elements 48320 in the plurality of second light-emitting groups 4832. The sum of the projected areas of the first projections of the first light-emitting elements 48310 in the plurality of first light-emitting groups 4831 is greater than the sum of the projected areas of the second projections of the second light-emitting elements 48320 in the plurality of second light-emitting groups 4832, to ensure that the cumulative luminous flux of each first light-emitting element 48310 in the plurality of first light-emitting groups 4831 is greater than the cumulative luminous flux of each second light-emitting element 48320 in the plurality of second light-emitting groups 4832, thereby ensuring that the luminous flux at the edge of the light source assembly 48 is close to the luminous flux at the center of the light source assembly 48, and improving the uniformity of illumination of the light source assembly 48.

[0051] Please combine Figures 3 to 6 In one embodiment, the light source assembly 48 further includes a second lens 484. The second lens 484 is disposed between the light-emitting element 483 and the lens base 4851. The second lens 484 can be a polarizing lens, for example, the second lens 484 is formed by attaching a polarizing film on a glass substrate, thereby reducing or eliminating phenomena such as surface reflection of the light emitted by the light-emitting element 483.

[0052] Along the third direction Z, the projections of multiple light-emitting elements 483 onto the lamp holder 482 are within the range of the projection of the second lens 484 onto the lamp holder 482, so as to ensure that the light emitted by each light-emitting element 483 passes through the second lens 484 before being directed to the first lens 485.

[0053] In this embodiment, along the third direction Z, the end of the light-emitting element 483 away from the lamp holder 482 abuts against the second lens 484, making the thickness of the entire light source assembly 48 smaller, reducing the volume and heat of the light source assembly 48, and improving the heat dissipation efficiency of the light source assembly 48.

[0054] Furthermore, the light source assembly 48 also includes a light-shielding member 486. The light-shielding member 486 is made of an opaque material and is generally a hollow columnar structure with openings at both ends. Multiple light-shielding members 486 are provided, positioned between the lamp holder 482 and the second lens 484. The number of second lenses 484 is the same as the sum of the number of first light-emitting elements 48310 and second light-emitting elements 48320. A light-shielding member 486 is provided on the light-emitting path of each first light-emitting element 48310 and each second light-emitting element 48320 to guide the light path of each first light-emitting element 48310 and second light-emitting element 48320.

[0055] In this embodiment, the light-shielding member 486 is disposed on the outside of the first light-emitting member 48310 or the second light-emitting member 48320, and the outer contour of the light-shielding member 486 extends beyond the outer contour of the first light-emitting member 48310 and the second light-emitting member 48320, so that any one of the first light-emitting members 48310 is spaced apart from the adjacent second light-emitting member 48320 or the adjacent first light-emitting member 48310.

[0056] The structure of the light-shielding element 486 is a hexagonal prism structure, and each light-shielding element 486 is arranged in a honeycomb array. Furthermore, since the outer contour of the light-shielding element 486 exceeds the outer contour of the first light-emitting element 48310 and the second light-emitting element 48320, it is ensured that any first light-emitting element 48310 is spaced apart from the adjacent second light-emitting element 48320 or the adjacent first light-emitting element 48310.

[0057] Furthermore, the light-shielding member 486 is designed as a hexagonal prism, which enables the splicing of the light spots of the first light-emitting member 48310 and the second light-emitting member 48320 at their edges, ensuring that the light emitted by the first light-emitting member 48310 and the second light-emitting member 48320 forms a point light source. Simultaneously, given a fixed cross-sectional area of ​​the first light-emitting member 48310 and the second light-emitting member 48320, the light-shielding member 486, with its regular hexagonal cross-section, blocks less light than other shapes such as squares.

[0058] Furthermore, the light source assembly 48 also includes a heat sink 481. Along the third direction Z, the heat sink 481 is located on the side of the lamp holder 482 away from the light-emitting element 483, and the lamp holder 482 is mounted on the heat sink 481. The heat sink 481 is made of a thermally conductive material such as metal, and the heat sink 481 is thermally coupled to the lamp holder 482 to transfer the heat generated by the lamp holder 482 and the light-emitting element 483 during operation to the heat sink 481. This heat dissipation from the heat sink 481 achieves heat dissipation for the light source assembly 48, preventing the accumulation of heat generated during operation and thus reducing the lifespan of the light source assembly 48.

[0059] Please combine Figure 7 And see Figure 2 In one embodiment, the light source assembly 48 further includes a control assembly 20, which is signal-connected to a plurality of light-emitting elements 483 and is configured to selectively control some of the light-emitting elements 483 to operate.

[0060] Specifically, when printing a layer of a specific shape, the light-transmitting and non-light-transmitting areas of the screen assembly 47 need to be adjusted. The control component 20 can adjust the light-emitting element 483 corresponding to the light-transmitting area to emit light towards the light-transmitting area, and control the light-emitting element 483 not corresponding to the light-transmitting area to stop working. This enables the light source assembly 48 to operate in zones, eliminating the need for all light-emitting elements 483 to emit light simultaneously. This reduces unnecessary power consumption and heat dissipation caused by the light-emitting elements 483 being in a constantly lit state, and also increases the lifespan of the light source assembly 48.

[0061] The specific embodiments of this application have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that various changes and substitutions can be made to the specific embodiments of this application without departing from the scope of this application. All such changes and substitutions fall within the scope defined by this application.

Claims

1. A light source assembly, characterized in that, include: Lamp holder; Multiple light-emitting elements are arranged in an array on one side of the lamp holder. The multiple light-emitting elements include multiple first light-emitting groups and multiple second light-emitting groups. Along a first direction, the multiple first light-emitting groups are arranged at intervals, and a second light-emitting group is provided between any two adjacent first light-emitting groups. Along a second direction, the first light-emitting group includes multiple first light-emitting elements arranged at intervals, and the second light-emitting group includes multiple second light-emitting elements arranged at intervals. The second direction intersects the first direction. Wherein, along the first direction, any second light-emitting element is located between two adjacent first light-emitting elements. The first lens includes a lens base and a plurality of lens protrusions. The lens base is located on the side of the light-emitting element away from the lamp holder. The plurality of lens protrusions are arranged in an array on the side of the lens base away from the light-emitting element. The plurality of lens protrusions are arranged in a one-to-one correspondence with the plurality of light-emitting elements.

2. The light source assembly as described in claim 1, characterized in that, Along a third direction, any one of the light-emitting elements forms a first projection on the lamp holder, and any one of the lens protrusions forms a second projection on the lamp holder. The first projection is located within the area of ​​its corresponding second projection, and the third direction is parallel to the normal direction of the plane containing the first direction and the second direction.

3. The light source assembly as described in claim 2, characterized in that, The center points of the first projection and the second projection are set to coincide.

4. The light source assembly as described in claim 1, characterized in that, The spacing between any two adjacent first light-emitting groups is the same, and the spacing between any two adjacent first light-emitting elements in the first light-emitting group is the same; The spacing between any two adjacent second light-emitting groups is the same, and the spacing between any two adjacent second light-emitting elements in the second light-emitting group is the same.

5. The light source assembly as described in claim 2, characterized in that, The number of first light-emitting elements in the plurality of first light-emitting groups is greater than the number of second light-emitting elements in the plurality of second light-emitting groups; The sum of the projected areas of the first projections of the first light-emitting elements in the plurality of first light-emitting groups is greater than the sum of the projected areas of the second projections of the second light-emitting elements in the plurality of second light-emitting groups.

6. The light source assembly as described in claim 1, characterized in that, The lens protrusion extends from the surface of the lens base away from the light-emitting element toward the side away from the light-emitting element, and the end face of the lens protrusion away from the lens base is curved.

7. The light source assembly as described in claim 1, characterized in that, The light source assembly further includes a second lens, which is disposed between the light-emitting element and the lens base, with the end of the light-emitting element away from the lamp holder abutting against the second lens.

8. The light source assembly as described in claim 7, characterized in that, The light source assembly further includes a light-shielding member. Each of the first light-emitting elements and each of the second light-emitting elements is provided with the light-shielding member along its light-emitting path. The outer contour of the light-shielding member extends beyond the outer contours of the first light-emitting element and the second light-emitting element, so that any one of the first light-emitting elements is spaced apart from the adjacent second light-emitting element or the adjacent first light-emitting element.

9. The light source assembly as described in claim 8, characterized in that, The structure of the light-shielding component is a hexagonal prism.

10. The light source assembly as claimed in claim 1, characterized in that, The light source assembly also includes a heat sink, which is located on the side of the lamp holder away from the light-emitting element, and the heat sink is thermally coupled to the lamp holder.

11. The light source assembly as claimed in claim 1, characterized in that, The light source assembly further includes a control component, which is signal-connected to the plurality of light-emitting elements and configured to selectively control some of the light-emitting elements to operate.

12. A 3D printer, characterized in that, Includes the light source assembly as described in any one of claims 1 to 11.

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