Light source mechanism and printer

Abstract

The utility model relates to a light source mechanism and a printer, the light source mechanism comprises a mounting assembly, a lens assembly and a light emitting assembly, the mounting assembly is provided with a mounting port, the lens assembly is arranged in the mounting port, and the lens assembly comprises a Fresnel lens, a first rigid transparent layer and a second rigid transparent layer; the Fresnel lens is arranged between the first rigid transparent layer and the second rigid transparent layer, the light-emitting assembly is arranged in the mounting assembly, and the light-emitting surface of the light-emitting assembly faces the first rigid transparent layer or the second rigid transparent layer; according to the light source mechanism and the printer, the light uniformity and the consistency of a printing sample in different areas are guaranteed through the arrangement of the Fresnel lens, the problem that a large-format LCD light source printing middle area is prone to fault is solved, meanwhile, the first rigid transparent layer and the second rigid transparent layer are arranged on the two sides of the Fresnel lens, the rigidity of a lens assembly can be enhanced, and the printing quality is improved. The problem that a Fresnel lens cannot be used for a long time and the printing effect is affected is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printers, in particular to a light source mechanism and a printer. BACKGROUND

[0002] A 3D printer, also known as a three-dimensional printer, is a machine that uses a cumulative manufacturing technology (i.e., a rapid prototyping technology). With the continuous development of technology, 3D printers have been widely used in more fields.

[0003] As one of the core components of an LCD-3D printer, the existing light source mechanism mostly adopts a structure composed of a COB light source, a Fresnel lens, and an LCD screen to improve light uniformity and ensure the consistency of printed samples in different areas.

[0004] However, due to the material problem of the Fresnel lens, it will be obviously bent and deformed downward after a long time of work, which will affect the light uniformity, so that the printer cannot realize stable printing for a long time, and the use reliability is limited. INNOVATION CONTENT

[0005] Therefore, it is necessary to provide a light source mechanism and a printer to solve the problem that the printing effect is affected due to the inability of the Fresnel lens to be used for a long time.

[0006] According to an aspect of the present application, a light source mechanism is provided, comprising:

[0007] A mounting assembly is provided with a mounting port.

[0008] A lens assembly is arranged in the mounting port, and the lens assembly comprises a Fresnel lens, a first rigid transparent layer, and a second rigid transparent layer, wherein the Fresnel lens is arranged between the first rigid transparent layer and the second rigid transparent layer.

[0009] A light-emitting assembly is arranged inside the mounting assembly, and a light-emitting surface of the light-emitting assembly faces the first rigid transparent layer or the second rigid transparent layer.

[0010] In one embodiment, the Fresnel lens has a projection area on the mounting assembly that is less than or equal to the projection area of the first rigid transparent layer on the mounting assembly; and the Fresnel lens has a projection area on the mounting assembly that is less than or equal to the projection area of the second rigid transparent layer on the mounting assembly.

[0011] In one of the embodiments, the Fresnel lens has a positive projection area on the mounting assembly equal to a positive projection area of the mounting port on the mounting assembly; the first rigid transparent layer has a positive projection area on the mounting assembly equal to the positive projection area of the mounting port on the mounting assembly; and the second rigid transparent layer has a positive projection area on the mounting assembly equal to the positive projection area of the mounting port on the mounting assembly.

[0012] In one of the embodiments, the light source mechanism further comprises a screen assembly, the screen assembly comprising a screen piece, a frosted piece and a transparent release piece, the screen piece being arranged on a side of the lens assembly facing away from the light emitting assembly, the frosted piece being arranged on a side of the screen piece facing away from the light emitting assembly, and the transparent release piece being arranged on a side of the frosted piece facing away from the light emitting assembly.

[0013] In one of the embodiments, the frosted piece is a frosted film, which is attached to the screen piece.

[0014] In one of the embodiments, the transparent release piece is a release film, which is attached to the frosted film.

[0015] In one of the embodiments, the screen assembly has a positive projection area on the mounting assembly equal to a positive projection area of the mounting port on the mounting assembly.

[0016] In one of the embodiments, the mounting assembly comprises a mounting frame, a resin groove and a mounting plate, the mounting plate being provided with a fixing port, the resin groove being arranged in the fixing port and cooperating with the mounting frame to form a receiving cavity for receiving the light emitting assembly, and the mounting port being arranged on the resin groove.

[0017] In one of the embodiments, the resin groove is detachably connected to the mounting plate; and / or, the resin groove is detachably connected to the mounting frame.

[0018] According to another aspect of the present application, there is provided a printer comprising the light source mechanism according to any one of the above embodiments.

[0019] The light source mechanism and the printer described above ensure light uniformity and consistency of the printed sample in different areas through the arrangement of the Fresnel lens, solve the problem of easy breakage in the middle area in large-format LCD light source printing, and meanwhile, through the arrangement of the first rigid transparent layer and the second rigid transparent layer on both sides of the Fresnel lens, the rigidity of the lens assembly can be enhanced, and the problem of affecting the printing effect due to the inability of the Fresnel lens to be used for a long time can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a structural schematic diagram of a light source mechanism according to an embodiment of the present application.

[0021] Figure 2 Fig. 4 is a partial enlarged view of A portion of Fig. 3. Figure 1

[0022] Fig. 5 is a schematic view of an external structure of a light source mechanism according to some embodiments of the present application. Figure 3

[0023] Fig. 6 is a schematic view of an external structure of a light source mechanism according to some embodiments of the present application. Figure 4 Figure 3 Fig. 7 is a schematic view of an external structure of a light source mechanism according to some embodiments of the present application.

[0024] Reference Signs:

[0025] 1, mounting assembly; 11, mounting bracket; 12, resin groove; 13, mounting plate; 14, accommodating cavity; 15, mounting port;

[0026] 2, lens assembly; 21, Fresnel lens; 22, first rigid transparent layer; 23, second rigid transparent layer;

[0027] 3, light emitting assembly;

[0028] 4, screen assembly; 41, screen member; 42, frosted member; 43, transparent anti-sticking member. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using some or all of these specific details, and that the present application is not limited to the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0031] ​In addition, the terms "first", "second", and the like, if any, are used herein for descriptive purposes only and should not be construed as indicating or implying relative importance or implicating the number of indicated technical features. Thus, a feature defined with "first", "second" may include at least one of the features explicitly or implicitly. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0032] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the present application, unless otherwise explicitly specified and limited, if the first feature is described as "on" or "under" the second feature, etc., it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0034] It should be noted that if an element is referred to as "fixed to" or "disposed to" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0035] 3D printer, also known as three-dimensional printer, is a kind of process equipment of rapid prototyping. Since the uniformity of light emitted by the light source composed of lens array and COB light source is mostly between 75-80%, the middle light intensity is weak, and the light is not vertical, which leads to low precision of 3D model product printed by 3D printer and large error. Therefore, most of the existing LCD-3D printers will install a Fresnel lens on the platform to process the light emitted by the differential light source into parallel light path, so that the emitted light is more parallel, more dense and more vertical, and the light effective area uniformity reaches more than 95%, thereby improving the precision.

[0036] However, since the Fresnel lens is made of plastic, it is easy to deform, and the temperature resistance is lower than other metals or glass, so it is easy to deform due to thermal expansion and contraction caused by external temperature changes, which makes the 3D printer with Fresnel lens unable to realize long-time stable printing and has limited use reliability.

[0037] Therefore, the present application provides a light source mechanism, which effectively prevents the deformation of the Fresnel lens made of plastic by setting a first rigid transparent layer and a second rigid transparent layer on both sides of the Fresnel lens, solves the problem that the Fresnel lens cannot be used for a long time and affects the printing effect, effectively maintains the optical performance of the lens, and further ensures the use reliability of the 3D printer with the Fresnel lens.

[0038] Referring to Figure 1 An embodiment of the present application provides a light source mechanism, which comprises a mounting assembly 1, a lens assembly 2 and a light emitting assembly 3. The mounting assembly 1 is used to provide a mounting position for the lens assembly 2 and the light emitting assembly 3 to combine the lens assembly 2 and the light emitting assembly 3. The light emitting assembly 3 is used to emit light, and the lens assembly 2 is used to transmit the light emitted by the light emitting assembly 3 to the screen in parallel, densely and vertically.

[0039] Referring to Figure 1 and Figure 2 , when specifically arranged, the inside of the mounting assembly 1 is provided with a containing cavity 14 for containing the light emitting assembly 3, and the outside of the mounting assembly 1 is provided with a mounting port 15 in communication with the containing cavity 14. The light emitting assembly 3 is arranged in the containing cavity 14 inside the mounting assembly 1, and the lens assembly 2 is arranged in the mounting port 15, so that the light emitted by the light emitting assembly 3 can be transmitted to the lens assembly 2.

[0040] The lens assembly 2 comprises a Fresnel lens 21, a first rigid transparent layer 22 and a second rigid transparent layer 23, and the Fresnel lens 21 is arranged between the first rigid transparent layer 22 and the second rigid transparent layer 23. Through the arrangement of the first rigid transparent layer 22 and the second rigid transparent layer 23, the rigidity of the lens assembly 2 can be enhanced, and the problem that the Fresnel lens 21 made of plastic will deform after long-time use and affect the printing effect can be solved.

[0041] The light emitting surface of the light emitting assembly 3 faces the first rigid transparent layer 22 or the second rigid transparent layer 23. Specifically, along the direction of light emission, the light emitting assembly 3, the first rigid transparent layer 22, the Fresnel lens 21 and the second rigid transparent layer 23 are sequentially arranged. The light emitted by the light emitting assembly 3 can first contact the first rigid transparent layer 22 and sequentially pass through the first rigid transparent layer 22, the Fresnel lens 21 and the second rigid transparent layer 23. Specifically, in the embodiment of the present application, the first rigid transparent layer 22 and the second rigid transparent layer 23 are both transparent glass, and the thickness of the first rigid transparent layer 22 and the second rigid transparent layer 23 is 3-6mm.

[0042] In addition, in order to ensure the use effect of the Fresnel lens 21 on improving light uniformity, the center of the ring pattern of the Fresnel lens 21 is aligned with the center of the lamp bead of the light emitting assembly 3, and the ring pattern surface of the Fresnel lens 21 faces the screen assembly 4 of the light source mechanism, and the smooth surface of the Fresnel lens 21 faces the light emitting assembly 3 of the light source mechanism.

[0043] In summary, the light source mechanism of the present application can ensure light uniformity and consistency of the printed sample in different areas through the arrangement of the Fresnel lens 21, solve the problem of easy breakage in the middle area of large-format LCD light source printing, and at the same time, through the arrangement of the first rigid transparent layer 22 and the second rigid transparent layer 23 on both sides of the Fresnel lens 21, the rigidity of the lens assembly 2 can be enhanced, and the problem that the Fresnel lens 21 cannot be used for a long time and affects the printing effect can be solved. In addition, during use, the light source mechanism of the present application can also correct and change the uniformity of the full-width light output power through the uniformity gray mask method, and ensure that the curing effect of each area of the surface is similar.

[0044] Referring to Figure 1 and Figure 2 In one of the embodiments, the area of the Fresnel lens 21 on the installation assembly 1 is less than or equal to the area of the first rigid transparent layer 22 on the installation assembly 1. So as to ensure that the first rigid transparent layer 22 can cover the Fresnel lens 21, and further ensure the protection effect of the first rigid transparent layer 22 on the Fresnel lens 21 and the rigidity enhancement effect of the lens assembly 2. The area of the Fresnel lens 21 on the installation assembly 1 is less than or equal to the area of the second rigid transparent layer 23 on the installation assembly 1. So as to ensure that the second rigid transparent layer 23 can cover the Fresnel lens 21, and further ensure the protection effect of the second rigid transparent layer 23 on the Fresnel lens 21 and the rigidity enhancement effect of the lens assembly 2.

[0045] Specifically, in the embodiment of the present application, the area of the normal projection of the Fresnel lens 21 on the mounting assembly 1 is equal to the area of the normal projection of the first rigid transparent layer 22 on the mounting assembly 1, and equal to the area of the normal projection of the second rigid transparent layer 23 on the mounting assembly 1. In order to better match the lens assembly 2 with the mounting port 15, the mounting effect of the lens assembly 2 on the mounting assembly 1 is ensured.

[0046] More specifically, the area of the normal projection of the Fresnel lens 21 on the mounting assembly 1 is equal to the area of the normal projection of the mounting port 15 on the mounting assembly 1. The area of the normal projection of the first rigid transparent layer 22 on the mounting assembly 1 is equal to the area of the normal projection of the mounting port 15 on the mounting assembly 1. The area of the normal projection of the second rigid transparent layer 23 on the mounting assembly 1 is equal to the area of the normal projection of the mounting port 15 on the mounting assembly 1. That is, in the embodiment of the present application, the area of the normal projection of the lens assembly 2 on the mounting assembly 1 is equal to the area of the normal projection of the mounting port 15 on the mounting assembly 1. In order to better match the lens assembly 2 with the mounting port 15, the mounting effect of the lens assembly 2 on the mounting assembly 1 is ensured.

[0047] Referring to Figure 1 and Figure 2 In one embodiment, the light source mechanism further comprises a screen assembly 4, which comprises a screen member 41, a frosted member 42 and a transparent anti-sticking member 43. The screen member 41 is arranged on the side of the lens assembly 2 away from the light emitting assembly 3 to receive the light emitted by the light emitting assembly 3. The frosted member 42 is arranged on the side of the screen member 41 away from the light emitting assembly 3 to effectively prevent the water mark phenomenon, thereby ensuring the brightness and clarity of the screen member 41. The transparent anti-sticking member 43 is arranged on the side of the frosted member 42 away from the light emitting assembly 3 to protect the frosted member 42 from damage by dust, fingerprints and scratches.

[0048] Specifically, in the embodiment of the present application, the screen member 41 is an LCD black and white screen. The frosted member 42 is a frosted film, which is attached to the screen member 41. Since the passage of light through the frosted film does not have adverse effects, and when the user touches the control, the water mark phenomenon does not occur, therefore, through the arrangement of the frosted film, the display quality of the screen member 41 can be effectively ensured. The transparent anti-sticking member 43 is a release film, which is attached to the frosted film. The release film can prevent damage and pollution to the frosted member 42 during production, processing and transportation, and can also protect the frosted member 42 from damage by dust, fingerprints and scratches.

[0049] In one embodiment, the area of the normal projection of the screen assembly 4 on the mounting assembly 1 is equal to the area of the normal projection of the mounting port 15 on the mounting assembly 1. In order to better match the screen assembly 4 with the mounting port 15, the mounting effect of the screen assembly 4 on the mounting assembly 1 is ensured.

[0050] Referring toFigure 1 、 Figure 3 and Figure 4 In one embodiment, the mounting assembly 1 comprises a mounting frame 11, a resin tank 12 and a mounting plate 13. The resin tank 12 is a component for storing and controlling the photosensitive resin in the light-curing 3D printer, which is crucial to the printing process. The resin tank 12 is usually designed to allow the liquid resin to cover the printing platform during the printing process, and can re-cover new liquid resin after each layer is printed for the next layer printing.

[0051] In particular, the mounting plate 13 is provided with a fixing opening, the resin tank 12 is arranged in the fixing opening and cooperates with the mounting frame 11 to form a containing cavity 14 containing the light-emitting assembly 3, and a mounting opening 15 is arranged on the resin tank 12. More specifically, in the embodiment of the present application, the resin tank 12 is detachably connected with the mounting plate 13 for mounting and dismounting between the resin tank 12 and the mounting plate 13. The resin tank 12 is detachably connected with the mounting frame 11 for mounting and dismounting between the resin tank 12 and the mounting frame 11.

[0052] That is, in one embodiment, the fixing opening is provided with a stepped clamping groove, and the outer side surface of the resin tank 12 is provided with a protruding clamping block. When the resin tank 12 is placed on the mounting plate 13, the clamping block is buckled in the clamping groove to complete the detachable connection between the resin tank 12 and the mounting plate 13. The side of the mounting frame 11 away from the light-emitting assembly 3 has a supporting portion, and the side of the resin tank 12 facing the light-emitting assembly 3 has an abutting portion. The supporting portion is in contact with the abutting portion, and the two are connected by bolts to realize the detachable connection between the resin tank 12 and the mounting frame 11.

[0053] In addition, in the embodiment of the present application, the mounting frame 11 comprises a light source enclosing plate and a light source fixing plate. The light source enclosing plate is arranged between the resin tank 12 and the light source fixing plate, and cooperates with the lens assembly 2, the resin tank 12 and the light source fixing plate to form the containing cavity 14, and the light-emitting assembly 3 is arranged on the light source fixing plate. The light source enclosing plate and the light source fixing plate are both opaque materials to ensure the light focusing effect of the mounting frame 11 on the light-emitting assembly 3.

[0054] Referring to Figures 1-4 The embodiment of the present application also provides a printer comprising the light source mechanism according to any one of the above embodiments. Specifically, the printer comprises a frame and a light source mechanism, and the light source mechanism is mounted on the frame.

[0055] The printer of the present application, through the setting of the Fresnel lens 21 in the light source mechanism, ensures the uniformity of light and the consistency of the printed sample in different areas, solves the problem of easy breakage in the middle area of large-format LCD light source printing, and through the setting of the first rigid transparent layer 22 and the second rigid transparent layer 23 on both sides of the Fresnel lens 21, the rigidity of the lens assembly 2 can be enhanced, and the problem that the Fresnel lens 21 cannot be used for a long time and affects the printing effect is solved.

[0056] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0057] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A light source mechanism, characterized by, The light source mechanism comprises: a mounting assembly provided with a mounting port; a lens assembly arranged in the mounting port, the lens assembly comprising a Fresnel lens, a first rigid transparent layer and a second rigid transparent layer, the Fresnel lens being arranged between the first rigid transparent layer and the second rigid transparent layer; a light-emitting assembly arranged inside the mounting assembly, a light-emitting surface of the light-emitting assembly facing the first rigid transparent layer or the second rigid transparent layer.

2. The light source mechanism according to claim 1, characterized by, The Fresnel lens has a normal projection area on the mounting assembly that is less than or equal to a normal projection area of the first rigid transparent layer on the mounting assembly; the Fresnel lens has a normal projection area on the mounting assembly that is less than or equal to a normal projection area of the second rigid transparent layer on the mounting assembly.

3. The light source mechanism according to claim 1, wherein The Fresnel lens has a normal projection area on the mounting assembly that is equal to a normal projection area of the mounting port on the mounting assembly; the first rigid transparent layer has a normal projection area on the mounting assembly that is equal to a normal projection area of the mounting port on the mounting assembly; The second rigid transparent layer has a normal projection area on the mounting assembly that is equal to a normal projection area of the mounting port on the mounting assembly.

4. The light source mechanism according to claim 1, wherein The light source mechanism further comprises a screen assembly, the screen assembly comprising a screen member, a frosted member and a transparent release member, the screen member being arranged on a side of the lens assembly away from the light-emitting assembly, the frosted member being arranged on a side of the screen member away from the light-emitting assembly, and the transparent release member being arranged on a side of the frosted member away from the light-emitting assembly.

5. The light source mechanism according to claim 4, wherein The frosted member is a frosted film, and the frosted film is attached to the screen member.

6. The light source mechanism according to claim 5, wherein The transparent release member is a release film, and the release film is attached to the frosted film.

7. The light source mechanism according to claim 4, wherein The screen assembly has a normal projection area on the mounting assembly that is equal to a normal projection area of the mounting port on the mounting assembly.

8. The light source mechanism according to claim 1, wherein The mounting assembly comprises a mounting frame, a resin groove and a mounting plate, the mounting plate being provided with a fixing port, the resin groove being arranged in the fixing port and cooperating with the mounting frame to enclose a receiving cavity for receiving the light-emitting assembly, and the mounting port being arranged on the resin groove.

9. The light source mechanism according to claim 8, wherein The resin groove and the mounting plate are detachably connected; and / or, the resin groove and the mounting frame are detachably connected.

10. A printer characterized by comprising: The light source mechanism comprises any one of claims 1-9.

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