Light source mechanism and three-dimensional forming equipment

Abstract

The utility model discloses a light source mechanism and three-dimensional forming equipment, which mainly gathers light rays of a luminous body by arranging a reflecting cone, reduces the loss of the light rays between the luminous body and a collimation component and ensures the forming precision. According to the main technical scheme, the light source mechanism is used for the three-dimensional forming equipment and comprises at least one light source assembly and a light source assembly, the light source assembly comprises a luminous body, a reflecting cone and a collimation assembly; the reflecting cone comprises a light outlet and a light channel, and the light channel is communicated with the light outlet; the light-emitting body is located in the light channel and faces the light outlet, the inner wall of the reflection cone has an outward expansion trend in the direction away from the light-emitting body, and the collimation assembly is located on the outer side of the light outlet of the reflection cone; light rays of the luminous body are emitted out through the light ray outlet, penetrate through the collimation assembly and then are projected to the display screen, and the inner wall of the reflection cone is used for reflecting the light rays of the luminous body. The backlight module is mainly used for providing backlight.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a light source mechanism and a three-dimensional molding device. Background Art

[0002] The light-curing 3D printer mainly includes a base, a material tank, a printing platform and a lifting mechanism. The base is usually a cavity structure, with a light source inside the base and a display screen on the base. The light source projects backlight to the display screen, and the display screen allows light to pass through with a preset contour according to the slice data, and then projects it into the material tank above the display screen, so that the resin under the printing platform in the material tank is cured with a preset contour. Among them, the intensity of the light source has a direct impact on the printing accuracy.

[0003] In the prior art, the light source mainly includes a light source and an optical lens, and a certain distance is between the light source and the optical lens for the divergence of light. For example, the patent with the publication number CN218593694U discloses a 3D printing UV light curing light source, including an LED array and a matrix optical concave-convex lens, and the LED array is arranged below the matrix optical concave-convex lens. However, the light emitting characteristics of the light source show Lambertian luminescence, and the light is scattered around, which will cause a large amount of light to be lost between the light source and the optical lens, resulting in a weakening of the light intensity and affecting the molding accuracy. Utility Model Content

[0004] In view of this, the utility model provides a light source mechanism and a three-dimensional forming device, which are mainly used to solve the problem of light loss between the light source and the optical lens.

[0005] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0006] On the one hand, the utility model provides a light source mechanism for a three-dimensional forming device, the three-dimensional forming device includes a display screen, and the light source mechanism includes:

[0007] at least one light source assembly;

[0008] The light source assembly includes a light emitter, a reflective cone and a collimating assembly;

[0009] The reflective cone includes a light outlet and a light channel, and the light channel is connected to the light outlet;

[0010] The illuminant is located in the light channel and faces the light outlet, the inner wall of the reflective cone has a tendency to expand outward in a direction away from the illuminant, and the collimating component is located outside the light outlet of the reflective cone;

[0011] The light from the luminous body is emitted through the light outlet, refracted or reflected by the collimating component, and then projected onto the display screen. The inner wall of the reflective cone is used to reflect the light from the luminous body.

[0012] Wherein, the inner wall of the reflective cone includes a curved surface;

[0013] Alternatively, the inner wall of the reflective cone comprises a flat surface.

[0014] Wherein, the inner wall of the reflective cone includes a first side inner wall, a second side inner wall, a third side inner wall and a fourth side inner wall, the first side inner wall and the second side inner wall are arranged opposite to each other, and the distance between the first side inner wall and the second side inner wall includes an increasing trend in a direction away from the light source, the third side inner wall and the fourth side inner wall are arranged opposite to each other, and the distance between the third side inner wall and the fourth side inner wall includes an increasing trend in a direction away from the light source;

[0015] The first side inner wall, the second side inner wall, the third side inner wall and the fourth side inner wall are all planes or the first side inner wall, the second side inner wall, the third side inner wall and the fourth side inner wall are all curved surfaces;

[0016] The central light of the luminous body coincides with the central axis of the reflecting cone.

[0017] The collimating assembly includes a first lens and a second lens, the first lens and the second lens are arranged in parallel, and the first lens is closer to the reflective cone than the second lens;

[0018] After the light from the luminous body is emitted through the light outlet, it is refracted for the first time by the first lens and refracted for the second time by the second lens, and then projected onto the display screen.

[0019] The first lens includes a first incident surface and a first exit surface, the second lens includes a second incident surface and a second exit surface, the first incident surface is opposite to the light exit, the first exit surface is opposite to the second incident surface, and the second exit surface is opposite to the display screen;

[0020] The first incident surface includes a light surface or a plane surface, and the first exit surface includes a tooth surface;

[0021] The second incident surface includes a light surface or a plane surface, and the second exit surface includes a curved surface.

[0022] The light source includes a central light ray. In the direction of the central light ray, the distance between the light source and the first incident surface is L1. The focal length of the first lens is F, and F satisfies:

[0023] 1×L1≤F≤4×L1.

[0024] The distance between the second lens and the first lens is L2, the distance between the second lens and the display screen is L3, and the thickness of the second lens is D1, wherein:

[0025] 0.1×D1≤L2≤4×D1;

[0026] 0.1×D1≤L3≤1×D1.

[0027] There are two light source assemblies, namely a first light source assembly and a second light source assembly, and the first light source assembly and the second light source assembly are arranged in parallel;

[0028] The first lens of the first light source assembly and the first lens of the second light source assembly are integrally formed, and the second lens of the first light source assembly and the second lens of the second light source assembly are integrally formed.

[0029] Wherein, the luminous body is an integrated surface light source;

[0030] The diameter of the luminous body is greater than or equal to 1 mm and less than or equal to 11 mm;

[0031] The light emitting angle of the light emitting body is greater than or equal to 90 degrees and less than or equal to 120 degrees.

[0032] Wherein, the light source assembly further includes a fixed substrate, the reflective cone further includes an inlet, the inlet is opposite to the light outlet, and the light channel is connected to the inlet;

[0033] The luminous body is connected to the fixed base plate, the fixed base plate is connected to the reflective cone, and the luminous body extends into the light channel from the entrance.

[0034] There are multiple light source assemblies, and the collimation assemblies of the multiple light source assemblies are integrally formed.

[0035] On the other hand, the utility model further provides a three-dimensional forming device, comprising any of the aforementioned light source mechanisms.

[0036] The utility model proposes a light source mechanism and a three-dimensional molding device, which mainly converge the light of the light-emitting body by setting a reflective cone, reduce the light loss between the light-emitting body and the collimating component, and ensure the molding accuracy. In the prior art, the light source mainly includes a light source and an optical lens. The light source and the optical lens are separated by a certain distance, which will cause a large amount of light to be lost between the light source and the optical lens, resulting in a weakening of the light intensity, affecting the molding accuracy. Compared with the prior art, in the present application document, the light with a smaller light output angle in the light of the light-emitting body will be directly emitted through the light outlet, while the light with a larger light output angle will be reflected by the inner wall of the reflective cone on the periphery of the light-emitting body, and then the light will be converged in the light channel and projected to the collimating component through the light outlet, so that most of the light of the light-emitting body can be projected to the collimating component, greatly reducing the light loss, and then ensuring the light intensity and molding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A structural schematic diagram of a light source mechanism provided by an embodiment of the utility model at a first viewing angle;

[0038] Figure 2 A schematic structural diagram of a light source mechanism provided by an embodiment of the utility model at a second viewing angle. DETAILED DESCRIPTION

[0039] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the present invention, the specific implementation method, structure, characteristics and effects of the light source mechanism proposed by the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0040] On the one hand, if Figure 1-2 As shown, the embodiment of the utility model provides a light source mechanism for a three-dimensional forming device, the three-dimensional forming device includes a display screen 200, and the light source mechanism includes:

[0041] At least one light source assembly 100;

[0042] The light source assembly 100 includes a light emitter 110, a reflective cone 120 and a collimating assembly;

[0043] The reflective cone 120 includes a light outlet and a light channel, and the light channel is connected to the light outlet;

[0044] The illuminant 110 is located in the light channel and faces the light outlet. The inner wall of the reflective cone 120 has a tendency to expand outward in a direction away from the illuminant 110. The collimating component is located outside the light outlet of the reflective cone 120.

[0045] The light from the light emitting body 110 is emitted through the light outlet, refracted or reflected by the collimating component, and then projected onto the display screen 200 . The inner wall of the reflective cone 120 is used to reflect the light from the light emitting body 110 .

[0046] The light source mechanism may be an upper projection type, i.e., the display screen 200 is located below the light source mechanism, and the light of the light source mechanism is projected downward, or the light source mechanism may be a lower projection type, i.e., the display screen 200 is located above the light source mechanism, and the light of the light source mechanism is projected upward. In the following embodiments, the lower projection type is taken as an example, and it can be understood that the upper projection type has a similar principle.

[0047] The stereoscopic forming device also includes a base, which can be a box structure with a cavity, the display screen 200 is arranged on the upper bottom plate of the base, and the light source mechanism is located in the cavity of the base. The luminous body 110 can be a variety of light sources such as a point light source and a surface light source, such as a COB light source, or a high-power integrated surface light source. The COB light source arranges the LED chip on a mirror metal substrate with a high reflectivity, thereby forming a high-light-efficiency integrated surface light source. The light of the luminous body 110 is diffuse light, and the light will diffuse outward as the propagation distance increases during the propagation process. In order to ensure that the light has enough coverage when projected onto the display screen 200, it is necessary to ensure that there is enough distance between the luminous body 110 and the collimation component, so that the light of the luminous body 110 can be sufficiently diffused before reaching the collimation component. The light of the luminous body 110 includes the central light at the center and the peripheral light around the periphery of the central light. The light with a smaller angle with the central light will be directly projected onto the collimation component, while the light with a larger angle with the central light will leave the range of the collimation component before reaching the collimation component, resulting in the loss of light. In order to avoid such light loss, the present embodiment uses the reflective cone 120 to reflect light at a large angle, thereby playing the role of light convergence.

[0048] Specifically, the reflective cone 120 can be in various shapes. The reflective cone 120 can be arranged only on one side or multiple sides of the light emitter 110, or can be arranged around the light emitter 110. In one embodiment, the structure of the reflective cone 120 is a hollow cone structure with uniform thickness of the side wall, the inner wall of the reflective cone 120 is arranged to form a light channel, the reflective cone 120 includes a central axis, and the structure of the reflective cone 120 is symmetrical relative to the central axis. The light emitter 110 is located in the light channel, and the central light of the light emitter 110 coincides with the central axis of the reflective cone 120. The light emitter 110 is located at one end of the light channel away from the light outlet. The inner wall of the reflective cone 120 includes a tendency to expand outward in the direction away from the light emitter 110, which means that the inner walls of any two opposite sides of the reflective cone 120 are away from each other in the direction away from the light emitter 110, or the coverage area of ​​the light channel in the direction perpendicular to the central axis increases in the direction away from the light emitter 110. The angle between the inner wall of the reflective cone 120 and the central axis can be greater than or equal to 30° and less than or equal to 60°, such as 45°. Among the light emitted by the illuminant 110, the light with an angle less than or equal to 45° with the central light will not be projected onto the inner wall of the reflective cone 120, and then propagate along the light channel and be emitted from the light outlet at the original angle. However, at least part of the light with an angle greater than 45° with the central light will be projected onto the inner wall of the reflective cone 120 after propagating for a certain distance, and then be reflected by the inner wall of the reflective cone 120 and be emitted from the light outlet, and the angle of emission is usually much smaller than the original angle. The reflective cone 120 reflects the light with a large light-emitting angle whose angle with the central light is greater than 45°. On the one hand, it prevents the light with a large light-emitting angle from being directly emitted from between the light-emitting body 110 and the collimating component, which causes light waste. The light with a large light-emitting angle is reflected by the reflective cone 120 so that the light with a large light-emitting angle can be converged and projected to the collimating component, thereby ensuring the utilization rate of the light, and ensuring the light intensity and molding accuracy. On the other hand, the reflective cone 120 can achieve the initial shaping of the light by converting the light with a large light-emitting angle into a light with a smaller angle relative to the central light, thereby making the collimation efficiency of the collimating component higher. In addition, it is worth noting that for the light with an angle greater than 45° with the central light, if the angle is too large and approaches the horizontal, it will be reflected multiple times by the inner wall of the reflective cone 120, and then the energy will be reduced. Therefore, the reflective cone 120 also has the function of filtering stray light.

[0049] The reflective cone 120 can be made of a metal material with a high reflectivity, or a plastic material, and a reflective film can be attached to the inner wall to ensure the reflectivity and reduce light loss.

[0050] A light source mechanism and a three-dimensional molding device proposed in the embodiment of the utility model mainly converge the light of the light-emitting body by setting a reflective cone, reduce the light loss between the light-emitting body and the collimating component, and ensure the molding accuracy. In the prior art, the light source mainly includes a light source and an optical lens. The light source and the optical lens are separated by a certain distance, which will cause a large amount of light to be lost between the light source and the optical lens, resulting in a weakening of the light intensity, affecting the molding accuracy. Compared with the prior art, in the present application document, the light of the light of the light-emitting body with a smaller light output angle will be directly emitted through the light outlet, while the light of the light with a larger light output angle will be reflected by the inner wall of the reflective cone on the periphery of the light-emitting body, and then the light will be converged in the light channel and projected to the collimating component through the light outlet, so that most of the light of the light-emitting body can be projected to the collimating component, greatly reducing the light loss, and then ensuring the light intensity and molding accuracy.

[0051] The inner wall shape of the reflective cone 120 may be formed by a line segment of a preset shape around the central axis of the reflective cone 120, and the line segment of the preset shape may be a straight line, an arc line or a free spline curve, in which case the light emitted from the light outlet may form a circular light spot. The inner wall of the reflective cone 120 may include a curved surface; or, the inner wall of the reflective cone 120 may include a flat surface.

[0052] In order to adapt to the shape of the display screen and to allow the light spots of multiple light source assemblies 100 to be spliced, the present application provides the following reflective cone 120 structure that emits a nearly square light spot. Specifically, the inner wall of the reflective cone 120 includes a first side inner wall, a second side inner wall, a third side inner wall, and a fourth side inner wall. The first side inner wall and the second side inner wall are arranged oppositely, and the distance between the first side inner wall and the second side inner wall includes an increasing trend in the direction away from the light emitter 110, or in other words, they are away from each other. The third side inner wall and the fourth side inner wall are arranged oppositely, and the distance between the third side inner wall and the fourth side inner wall includes an increasing trend in the direction away from the light emitter 110, or in other words, they are away from each other.

[0053] In one embodiment, the first side inner wall, the second side inner wall, the third side inner wall and the fourth side inner wall may all be planes, or, in other embodiments, the first side inner wall, the second side inner wall, the third side inner wall and the fourth side inner wall may all be curved surfaces. The surface shape of the inner wall of the reflective cone 120 may be set according to the specific structure of the collimating assembly and the shape and size of the light source 110, and the present application does not impose any restrictions thereto. It can be understood that the surface shape of the inner wall intended to converge light should be within the protection scope of the present application. In an embodiment in which the first side inner wall, the second side inner wall, the third side inner wall and the fourth side inner wall are all planes, the reflective cone 120 may be formed by four plates of the same structure connected end to end in sequence and surrounding one circle. Alternatively, the reflective cone 120 may also be integrally formed by injection molding.

[0054] The collimation component can be a variety of structures with collimation functions, such as a lens, which can collimate the light by refracting the light to different degrees at different positions. The collimation component can also include a reflector, such as a plane reflector or an inwardly concave arc reflector, which can collimate the light by reflecting at different angles at different positions.

[0055] In a more specific embodiment, the collimating assembly includes a first lens 130 and a second lens 140, which are arranged in parallel, and the first lens 130 is closer to the reflective cone 120 than the second lens 140. After the light from the light source 110 is emitted through the light outlet, it is projected onto the display screen 200 after the first refraction of the first lens 130 and the second refraction of the second lens 140.

[0056] The first lens 130 and the second lens 140 work together to bear a portion of the optical focal length respectively, and can allow the focal length of the first lens 130 and the second lens 140 to increase while ensuring the collimation effect, so that the first lens 130 and the second lens 140 will not be excessively bent, thereby reducing the difficulty of processing. At the same time, it is prevented that the focal length is too small, resulting in excessive convexity of the first lens 130 and the second lens 140, thereby avoiding low lens efficiency and reflection.

[0057] The first lens 130 and the second lens 140 both play a role in converging light, and a variety of lenses can be selected. For example, in a specific embodiment, the first lens 130 includes a first incident surface and a first exit surface, and the second lens 140 includes a second incident surface and a second exit surface. The first incident surface is opposite to the light exit of the reflective cone 120, the first exit surface is opposite to the second incident surface, and the second exit surface is opposite to the display screen 200. The first incident surface includes a smooth surface or a plane, and the first exit surface includes a toothed surface. The second incident surface includes a smooth surface or a plane, and the second exit surface includes an arcuate surface.

[0058] The first lens 130 may be a Fresnel lens, and the second lens 140 may be a convex lens. The tooth surface of the Fresnel lens faces the second lens 140, which can reduce the reflection of light. The Fresnel lens can be regarded as a flattened convex lens, which can reduce the space occupied by the first lens 130, thereby reducing the overall length of the light source mechanism. The convex lens has a higher precision. After the Fresnel lens performs a preliminary refraction to converge the light, the convex lens performs a secondary refraction of the light, so that the light is accurately collimated, thereby ensuring the molding accuracy.

[0059] In one embodiment, if Figure 1 As shown, the light emitting body 110 includes a central light. In the direction of the central light, the distance between the light emitting body 110 and the first incident surface is L1. The focal length of the first lens 130 is F, and F satisfies: 1×L1≤F≤4×L1.

[0060] As mentioned above, the double refraction of the first lens 130 and the second lens 140 allows the focal length of the first lens 130 to be increased. 1×L1≤F can avoid the excessive protrusion caused by the Fresnel lens having a focal length that is too small. Increasing the focal length of the Fresnel lens can ensure the efficiency of the Fresnel lens and reduce the difficulty of processing. F≤4×L1 makes the Fresnel lens have a certain collimation effect, avoids the second lens 140 from bearing too much collimation burden, and avoids the second lens 140 having a focal length that is too small.

[0061] In some embodiments, Figure 1 As shown, the distance between the second lens 140 and the first lens 130 is L2, or the distance between the first exit surface of the first lens 130 and the second incident surface of the second lens 140 is L2. The distance between the second lens 140 and the display screen 200 is L3, or the distance between the vertex of the second exit surface of the second lens 140 and the display screen 200 is L3. The thickness of the second lens is D1, or the distance between the second incident surface of the second lens 140 and the vertex of the second exit surface of the second lens 140 is D1. Among them, 0.1×D1≤L2 is convenient for the installation of the first lens 130 and the second lens 140; L2≤4×D1 is to avoid the light source assembly 100 occupying too much space due to too large a distance. 0.1×D1≤L3 is convenient for the installation of the second lens 140 and the display screen 200, and L3≤1×D1 is to avoid the distance from occupying too much space and reduce light loss.

[0062] In one embodiment, the diameter of the light emitter 110 is greater than or equal to 1 mm, so as to provide sufficient light energy and ensure molding accuracy. The diameter of the light emitter 110 is less than or equal to 11 mm, so as to avoid the high cost of large-area surface light sources, slow heat dissipation, and high temperature of the light source. For example, the diameter of the light emitter 110 may be 2 mm, 4 mm, 6 mm, etc. The emission angle of the light emitter 110 is greater than or equal to 90 degrees, so that the light of the light emitter 110 can provide a sufficient projection area. The emission angle of the light emitter 110 is less than or equal to 120 degrees, so as to avoid the loss of light at too large an angle due to multiple reflections by the reflective cone 120, and ensure the utilization rate of the light. Specifically, the emission angle of the light emitter 110 may be 100 degrees, 103 degrees, 112 degrees, 119 degrees, etc.

[0063] The light channel may be a closed structure on the side opposite to the light outlet, and the illuminant 110 is disposed on the inner wall of the light channel on the side opposite to the light outlet. Alternatively, in one embodiment, the light source assembly 100 further includes a fixed substrate 150, and the reflective cone 120 further includes an inlet, the inlet is opposite to the light outlet, and the light channel is connected to the inlet. The illuminant 110 is connected to the fixed substrate 150, the fixed substrate 150 is connected to the reflective cone 120, and the illuminant 110 extends into the light channel from the inlet.

[0064] The reflective cone 120 is a four-sided pyramid structure with two ends connected. A boss is provided on the fixed substrate 150, and the luminous body 110 or LED lamp beads are arranged on the upper surface of the boss. The area of ​​the entrance of the reflective cone 120 is larger than the upper surface area of ​​the boss, so that the reflective cone 120 can be sleeved on the outer periphery of the boss through one side of the entrance and connected and fixed to the fixed substrate 150. The reflective cone 120 is easy to process and the replacement of the luminous body 110 is convenient.

[0065] In one implementation, there are multiple light source assemblies 100 , and the collimating assemblies of the multiple light source assemblies 100 are integrally formed.

[0066] The light from multiple light source assemblies 100 is combined to provide backlight for the display screen 200, so that the area required for any light source assembly 100 to provide backlight is reduced, and the light source assembly 100 has higher energy, higher efficiency, and higher collimation.

[0067] In one embodiment, there are two light source assemblies 100, namely a first light source assembly and a second light source assembly, and the first light source assembly and the second light source assembly are arranged in parallel; the first lens 130 of the first light source assembly and the first lens 130 of the second light source assembly are integrally formed, and the second lens 140 of the first light source assembly and the second lens 140 of the second light source assembly are integrally formed. In the other two light source assemblies 100, the reflective cone 120, the fixed substrate 150 and the light-emitting body 110 can all be arranged separately, and the reflective cone 120 has the same structure and can be used universally. The first lenses 130 of the two light source assemblies 100 are integrally formed, and Fresnel lens areas corresponding to the two light-emitting bodies 110 can be processed on a whole light-transmitting plate. The second lenses 140 of the two light source assemblies 100 are integrally formed, that is, a double convex lens is used.

[0068] On the other hand, the utility model also provides a three-dimensional molding device, including any of the aforementioned light source mechanisms, as well as a base, a printing platform, a Z-axis drive mechanism and a material trough, wherein a display screen 200 is laid on the upper bottom plate of the base, the light source mechanism is located in the inner cavity of the base, and light is projected onto the display screen 200. The material trough is used to hold resin and place it on the display screen 200. The Z-axis drive mechanism is connected to the base, and the printing platform is connected to the Z-axis drive mechanism and is opposite to the material trough, and is used to move relative to the material trough for printing under the drive of the Z-axis drive mechanism. The display screen 200 is a rectangular display screen, and when there are two light source assemblies 100, the arrangement direction of the two light source assemblies 100 is the length direction of the display screen 200.

[0069] The three-dimensional forming equipment includes any of the aforementioned light source mechanisms, including the advantages of any of the aforementioned light source mechanisms, which will not be repeated here.

[0070] The utility model also provides the following embodiments:

[0071] Reference numeral 1, a light source mechanism, used in a three-dimensional forming device, the three-dimensional forming device comprising a display screen 200, wherein the light source mechanism comprises:

[0072] At least one light source assembly 100;

[0073] The light source assembly 100 includes a light emitter 110, a reflective cone 120 and a collimating assembly;

[0074] The reflective cone 120 includes a light outlet and a light channel, and the light channel is connected to the light outlet;

[0075] The illuminant 110 is located in the light channel and faces the light outlet. The inner wall of the reflective cone 120 has a tendency to expand outward in a direction away from the illuminant 110. The collimating component is located outside the light outlet of the reflective cone 120.

[0076] The light from the light emitting body 110 is emitted through the light outlet, refracted or reflected by the collimating component, and then projected toward the display screen 200 . The inner wall of the reflective cone 120 is used to reflect the light from the light emitting body 110 .

[0077] Reference numeral 2. A light source mechanism according to reference numeral 1, wherein:

[0078] The inner wall of the reflective cone 120 includes a curved surface;

[0079] Alternatively, the inner wall of the reflective cone 120 includes a flat surface.

[0080] Reference numeral 3. A light source mechanism according to reference numeral 1, wherein:

[0081] The inner wall of the reflective cone 120 includes a first side inner wall, a second side inner wall, a third side inner wall and a fourth side inner wall. The first side inner wall and the second side inner wall are arranged opposite to each other, and the distance between the first side inner wall and the second side inner wall increases in the direction away from the light emitter 110. The third side inner wall and the fourth side inner wall are arranged opposite to each other, and the distance between the third side inner wall and the fourth side inner wall increases in the direction away from the light emitter 110.

[0082] The first side inner wall, the second side inner wall, the third side inner wall and the fourth side inner wall are all planes or the first side inner wall, the second side inner wall, the third side inner wall and the fourth side inner wall are all curved surfaces;

[0083] The central light of the light emitting body 110 coincides with the central axis of the reflective cone 120 .

[0084] Reference numeral 4. A light source mechanism according to reference numeral 1, wherein:

[0085] The collimating assembly includes a first lens 130 and a second lens 140, the first lens 130 and the second lens 140 are arranged in parallel, and the first lens 130 is closer to the reflective cone 120 than the second lens 140;

[0086] After the light from the light emitting body 110 is emitted through the light outlet, it is refracted for the first time by the first lens 130 and refracted for the second time by the second lens 140 before being projected toward the display screen 200 .

[0087] Reference numeral 5. A light source mechanism according to reference numeral 4, wherein:

[0088] The first lens 130 includes a first incident surface and a first exit surface, and the second lens 140 includes a second incident surface and a second exit surface, the first incident surface is opposite to the light exit, the first exit surface is opposite to the second incident surface, and the second exit surface is used to be opposite to the display screen 200;

[0089] The first incident surface includes a light surface or a plane surface, and the first exit surface includes a tooth surface;

[0090] The second incident surface includes a light surface or a plane surface, and the second exit surface includes a curved surface.

[0091] Reference numeral 6. A light source mechanism according to reference numeral 5, wherein:

[0092] The light emitting body 110 includes a central light. In the direction of the central light, the distance between the light emitting body 110 and the first incident surface is L1. The focal length of the first lens 130 is F, and F satisfies:

[0093] 1×L1≤F≤4×L1.

[0094] Reference numeral 7, according to the light source mechanism of reference numeral 5, wherein the distance between the second lens 140 and the first lens 130 is L2, the distance between the second lens 140 and the display screen 200 is L3, and the thickness of the second lens is D1, wherein:

[0095] 0.1×D1≤L2≤4×D1;

[0096] 0.1×D1≤L3≤1×D1.

[0097] Reference numeral 8, a light source mechanism according to reference numeral 4, wherein the number of the light source assemblies 100 is two, namely a first light source assembly and a second light source assembly, and the first light source assembly and the second light source assembly are arranged in parallel;

[0098] The first lens 130 of the first light source assembly and the first lens 130 of the second light source assembly are integrally formed, and the second lens 140 of the first light source assembly and the second lens 140 of the second light source assembly are integrally formed.

[0099] Reference numeral 9. The light source mechanism according to reference numeral 1, wherein:

[0100] The light emitting body 110 is an integrated surface light source;

[0101] The diameter of the light emitting body 110 is greater than or equal to 1 mm and less than or equal to 11 mm;

[0102] The light emitting angle of the light emitting body 110 is greater than or equal to 90 degrees and less than or equal to 120 degrees.

[0103] Reference numeral 10. The light source mechanism according to reference numeral 1, wherein:

[0104] The light source assembly 100 further includes a fixed substrate 150, and the reflective cone 120 further includes an inlet, the inlet is opposite to the light outlet, and the light channel is connected to the inlet;

[0105] The luminous body 110 is connected to the fixed substrate 150, the fixed substrate 150 is connected to the reflective cone 120, and the luminous body 110 extends into the light channel from the entrance.

[0106] Reference numeral 11. A light source mechanism according to reference numeral 1, wherein:

[0107] There are multiple light source assemblies 100 , and the collimating assemblies of the multiple light source assemblies 100 are integrally formed.

[0108] Label 12. A three-dimensional molding device, which includes a light source mechanism of any one of the above labels 1-11.

[0109] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A light source mechanism for a three-dimensional forming device, wherein the three-dimensional forming device comprises a display screen (200), characterized in that: The light source mechanism comprises: at least one light source assembly (100); The light source assembly (100) comprises a light emitter (110), a reflective cone (120) and a collimating assembly, the light emitter (110) is an integrated surface light source, and the diameter of the light emitter (110) is greater than or equal to 1 mm and less than or equal to 11 mm; The reflective cone (120) comprises a light outlet and a light channel, wherein the light channel is connected to the light outlet; The light emitting body (110) is located in the light channel, and the light emitting body (110) faces the light outlet, the inner wall of the reflective cone (120) has a tendency to expand outward in a direction away from the light emitting body (110), and the collimating component is located outside the light outlet of the reflective cone (120); The light of the illuminant (110) is emitted through the light outlet, refracted or reflected by the collimating component, and then projected toward the display screen (200), and the inner wall of the reflective cone (120) is used to reflect the light of the illuminant (110).

2. The light source mechanism according to claim 1, characterized in that: The inner wall of the reflective cone (120) comprises a curved surface; Alternatively, the inner wall of the reflective cone (120) comprises a plane.

3. The light source mechanism according to claim 1, characterized in that: The inner wall of the reflective cone (120) comprises a first side inner wall, a second side inner wall, a third side inner wall and a fourth side inner wall, the first side inner wall and the second side inner wall are arranged opposite to each other, and the distance between the first side inner wall and the second side inner wall has an increasing trend in a direction away from the light emitter (110), the third side inner wall and the fourth side inner wall are arranged opposite to each other, and the distance between the third side inner wall and the fourth side inner wall has an increasing trend in a direction away from the light emitter (110); The first side inner wall, the second side inner wall, the third side inner wall and the fourth side inner wall are all planes, or the first side inner wall, the second side inner wall, the third side inner wall and the fourth side inner wall are all curved surfaces; The central light of the illuminant (110) coincides with the central axis of the reflective cone (120).

4. The light source mechanism according to claim 1, characterized in that: The collimating assembly comprises a first lens (130) and a second lens (140), wherein the first lens (130) and the second lens (140) are arranged in parallel, and the first lens (130) is closer to the reflective cone (120) than the second lens (140); After the light from the light source (110) is emitted through the light outlet, it is refracted for the first time by the first lens (130) and refracted for the second time by the second lens (140) before being projected onto the display screen (200).

5. The light source mechanism according to claim 4, characterized in that: The first lens (130) comprises a first incident surface and a first exit surface, the second lens (140) comprises a second incident surface and a second exit surface, the first incident surface is opposite to the light exit, the first exit surface is opposite to the second incident surface, and the second exit surface is used to be opposite to the display screen (200); The first incident surface includes a light surface or a plane surface, and the first exit surface includes a tooth surface; The second incident surface includes a light surface or a plane surface, and the second exit surface includes a curved surface.

6. The light source mechanism according to claim 5, characterized in that: The light emitting body (110) includes a central light ray. In the direction of the central light ray, the distance between the light emitting body (110) and the first incident surface is L1. The focal length of the first lens (130) is F, and F satisfies: 1×L1≤F≤4×L1.

7. The light source mechanism according to claim 5, characterized in that: The distance between the second lens (140) and the first lens (130) is L2, the distance between the second lens (140) and the display screen (200) is L3, and the thickness of the second lens is D1, wherein: 0.1×D1≤L2≤4×D1; 0.1×D1≤L3≤1×D1.

8. The light source mechanism according to claim 4, characterized in that: The number of the light source assemblies (100) is two, namely a first light source assembly and a second light source assembly, and the first light source assembly and the second light source assembly are arranged in parallel; The first lens (130) of the first light source assembly and the first lens (130) of the second light source assembly are integrally formed, and the second lens (140) of the first light source assembly and the second lens (140) of the second light source assembly are integrally formed.

9. The light source mechanism according to claim 1, characterized in that: The light emitting angle of the light emitting body (110) is greater than or equal to 90 degrees and less than or equal to 120 degrees.

10. The light source mechanism according to claim 1, characterized in that: The light source assembly (100) further comprises a fixed substrate (150), and the reflective cone (120) further comprises an inlet, the inlet is opposite to the light outlet, and the light channel is connected to the inlet; The luminous body (110) is connected to the fixed substrate (150), the fixed substrate (150) is connected to the reflective cone (120), and the luminous body (110) extends from the entrance into the light channel.

11. The light source mechanism according to claim 1, characterized in that: There are a plurality of light source assemblies (100), and the collimating assemblies of the plurality of light source assemblies (100) are integrally formed.

12. A three-dimensional forming device, characterized in that: The invention comprises the light source mechanism described in any one of claims 1 to 11.

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