Light-cured 3D printer and its molding platform locking mechanism

Abstract

The application relates to the field of 3D printing equipment, aims to solve the problem of poor operation convenience and difficult accurate positioning of the positioning and fixing of a forming platform, and provides a photocuring 3D printer and a forming platform locking mechanism thereof. The photocuring 3D printer forming platform locking mechanism comprises a forming platform and a locking frame. The forming platform comprises a first lug and two second lugs. The locking frame comprises a first frame plate, two second frame plates and a locking structure. The first frame plate is provided with a first sliding groove, and the two second frame plates are respectively provided with second sliding grooves. The first sliding groove is matched with the first lug, and the second sliding groove is matched with the second lug. A first abutting protrusion corresponding to the groove bottom surface of the first sliding groove in a third direction is arranged at the first sliding groove, and a second abutting protrusion corresponding to the groove bottom surface of the second sliding groove in the third direction is arranged at the second sliding groove. The application has the beneficial effect that the positioning of the forming platform can be conveniently realized, the positioning is convenient, accurate and beneficial to ensuring the printing quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of 3D printing equipment, in particular, to a light-curing 3D printer and a forming platform locking mechanism thereof. BACKGROUND

[0002] The light-curing 3D printer is a device for forming a to-be-formed object by layer-by-layer curing of liquid light-curing material (such as light-curing resin) under light. Before printing, a forming platform needs to be installed to support the cured model; after printing, the forming platform needs to be removed to take out the printed model.

[0003] In the known technology, the installation and removal of the forming platform is realized by screwing, which is not convenient to operate, and the positioning accuracy is reduced after long-term use, thereby affecting the quality of model forming. SUMMARY

[0004] The present application aims to provide a light-curing 3D printer forming platform locking mechanism and a light-curing 3D printer to solve the problem of poor operation convenience and inaccurate positioning of the forming platform positioning and fixing.

[0005] In a first aspect, the present application provides a light-curing 3D printer forming platform locking mechanism, which comprises a forming platform and a locking frame. The forming platform is provided with a first edge and a second edge opposite along a first direction, and two side edges opposite along a second direction; the forming platform comprises a first lug, which protrudes from the first edge to the side away from the second edge; the forming platform comprises two second lugs, which respectively protrude outward from the two side edges; the second direction is perpendicular to the first direction. The locking frame comprises a first frame plate, two second frame plates connected to the two ends of the first frame plate, and a locking structure; the first frame plate is provided with a first sliding groove, and the two second frame plates are respectively provided with a second sliding groove; the first sliding groove is matched with the first lug, and the second sliding groove is matched with the second lug; the first sliding groove and the second sliding groove jointly define a first position and a second position for matching the forming platform; in the first position, the first sliding groove and the second sliding groove respectively pass through the top surface of the locking frame along a third direction, for allowing the first lug of the forming platform to enter and be supported on the groove bottom surface of the first sliding groove along the third direction, and allowing the second lug of the forming platform to enter and be supported on the groove bottom surface of the second sliding groove along the third direction; in the second position, the first frame plate abuts against the first lug along the third direction to limit the first lug from leaving the first sliding groove along the third direction; the third direction is perpendicular to the first direction and perpendicular to the second direction; the locking structure is connected to the second frame plate and can push the forming platform from the first position to the second position along the first direction and lock it; in the second position, the second frame plate abuts against the second lug along the third direction to limit the second lug from leaving the second sliding groove along the third direction.

[0006] The locking mechanism of the light-cured 3D printer forming platform in the present application is used by placing the forming platform into the first position of the locking frame, specifically by making the first lug enter and support on the groove bottom surface of the first sliding groove along the third direction, and making the second lug enter and support on the groove bottom surface of the second sliding groove along the third direction; then, the locking structure is used to push the forming platform along the first direction, so that the forming platform moves along the first direction to the position where the first lug is limited by the first frame plate along the third direction and the second lug is limited by the second frame plate along the third direction, completing the positioning and locking of the forming platform. At this time, the positioning of the forming platform in the plane (the first direction and the second direction) can be achieved by the cooperation of the first lug and the second lug with the locking frame in the plane.

[0007] Therefore, by the first lug and the second lug on both sides, the positioning of the forming platform in the plane (the first direction and the second direction) and in the vertical direction (the third direction) can be achieved, which is convenient to use, accurate in positioning, and beneficial to ensure the printing quality.

[0008] In an embodiment, the first frame plate is provided with a first resisting protrusion corresponding to the spacing of the groove bottom surface of the first sliding groove along the third direction, and in the second position, the first lug is limited between the groove bottom surface of the first sliding groove and the first resisting protrusion. The first frame plate is provided with a second resisting protrusion corresponding to the spacing of the groove bottom surface of the second sliding groove along the third direction; in the second position, the second lug is limited between the groove bottom surface of the second sliding groove and the second resisting protrusion.

[0009] In an embodiment, the first lug has two, and the two first lugs are spaced apart along the second direction.

[0010] In an embodiment, the cross-sectional shape of the first lug in the plane perpendicular to the third direction is an isosceles trapezoid with the width outside small and the width inside large; the first sliding groove is adapted to the isosceles trapezoid of the first lug, and in the second position, the two side slopes of the isosceles trapezoid of the first lug abut against the two side groove surfaces of the first sliding groove.

[0011] In an embodiment, the first lug is provided with a first chamfer at the outer edge away from the groove bottom surface of the first sliding groove. The surface of the first resisting protrusion facing the side of the groove bottom surface of the first sliding groove includes a first slope, which is used for abutting against the first chamfer.

[0012] In an embodiment, the second lug has a resisting slope, which is obliquely intersected with the first direction and obliquely faces the side of the first edge; the second sliding groove has a resisting groove surface corresponding to the resisting slope, and in the second position, the resisting slope corresponds to the resisting groove surface.

[0013] In an embodiment, the resisting slope is provided with a second chamfer away from the side of the groove bottom surface of the second sliding groove. The surface of the second resisting protrusion facing the side of the groove bottom surface of the second sliding groove includes a second slope, which is used for abutting against the second chamfer.

[0014] In one embodiment, the locking structure comprises a cam handle, the cam handle comprises a cam portion and a handle portion connected together, the cam portion is eccentrically rotatably connected to the second frame plate, and is rotatable to press the forming platform in the first direction to lock in the second position, or to rotate to unlock the forming platform.

[0015] In one embodiment, the locking structure comprises a cam handle, the cam handle comprises a cam portion and a handle portion connected together, the cam portion is eccentrically rotatably connected to the second frame plate, and is rotatable to press the forming platform in the first direction to lock in the second position, or to rotate to unlock the forming platform.

[0016] In one embodiment, the forming platform comprises a forming plate, a surrounding plate, a first flange and a second flange. The forming plate is used to attach the printed object, the surrounding plate is connected to the outer periphery of the forming plate, and the first flange and the second flange are respectively formed by extending outward from the two sides of the first direction of the surrounding plate. The first lug is provided on the first flange, and the two second lugs are respectively provided on the two ends of the second flange along the second direction.

[0017] The present application also provides a light-cured 3D printer, which comprises:

[0018] a bottom plate assembly;

[0019] a plurality of first shafts;

[0020] a middle plate assembly supported by the plurality of first shafts and connected above the bottom plate assembly;

[0021] a tray assembly for accommodating light-cured material, the tray assembly being supported on the middle plate assembly;

[0022] a lifting platform assembly, the lifting platform assembly comprising a bottom platform, a plurality of second shafts and the aforementioned light-cured 3D printer forming platform locking mechanism; the bottom platform is slidably fitted on the plurality of first shafts and located between the bottom plate assembly and the middle plate assembly; the plurality of second shafts are respectively slidably passed through the middle plate assembly and support the locking frame on the side of the middle plate assembly away from the bottom platform; the forming platform is used to attach the cured model, and the forming platform is supported on the locking frame and corresponds to the tray assembly in the lifting direction of the lifting platform assembly;

[0023] a driving assembly drivingly connected to the lifting platform assembly for moving the lifting platform assembly to move the forming platform closer to or further away from the tray assembly;

[0024] a light source for providing light for curing the light-cured material. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation on the scope, and for those of ordinary skill in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 A three-dimensional view of the light-cured 3D printer in the embodiments of the present application;

[0027] Figure 2 A schematic view of the forming platform of the light-cured 3D printer in Figure 1 extending into the tray assembly;

[0028] Figure 3 An expanded view of the forming platform locking mechanism of the light-cured 3D printer in the embodiments of the present application;

[0029] Figure 4 A structural schematic view of the locking frame in Figure 3 ;

[0030] Figure 5 Another perspective view of the locking frame in Figure 4 ;

[0031] Figure 6 A top view of the forming platform locking mechanism of the light-cured 3D printer in the embodiments of the present application, the locking structure being in an open state;

[0032] Figure 7 A sectional view along A-A line in Figure 6 ;

[0033] Figure 8 A sectional view along B-B line in Figure 7 ;

[0034] Figure 9 A top view of the forming platform locking mechanism of the light-cured 3D printer in the embodiments of the present application, the locking structure being in a locked state;

[0035] Figure 10 A sectional view along C-C line in Figure 9 ;

[0036] Figure 11 A sectional view along D-D line in Figure 10 .

[0037] Main element symbol explanation:

[0038] Light-cured 3D printer 300

[0039] Base plate assembly 301

[0040] First shaft 302

[0041] Middle plate assembly 303

[0042] Tray assembly 304

[0043] Lifting platform assembly 305

[0044] Drive assembly 306

[0045] Light source 307

[0046] Bottom platform 308

[0047] Second shaft 309

[0048] Motor 310

[0049] Lead screw nut assembly 311

[0050] Light-curing 3D printer forming platform locking mechanism 100

[0051] Locking frame 10

[0052] Forming platform 11

[0053] First lug 12

[0054] Second lug 13

[0055] First frame plate 14

[0056] Second frame plate 15

[0057] Locking structure 16

[0058] Forming plate 17

[0059] Surrounding plate 18

[0060] First convex edge 19

[0061] Second convex edge 20

[0062] First abutting protrusion 21

[0063] Second abutting protrusion 22

[0064] Cam handle 23

[0065] Cam portion 24

[0066] Handle portion 25

[0067] Rotating sleeve 26

[0068] First direction Y1

[0069] Second direction Y2

[0070] Third direction Y3

[0071] First side L1

[0072] Second side L2

[0073] Side L3

[0074] First chute C1

[0075] Second chute C2

[0076] First position W1

[0077] Second position W2

[0078] Eccentric hole K1

[0079] Side bevel P1

[0080] Side groove P2

[0081] First chamfer P3

[0082] First bevel P4

[0083] Abutting bevel P5

[0084] Abutting groove P6

[0085] Second chamfer P7

[0086] Second bevel P8 DETAILED DESCRIPTION

[0087] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application.

[0088] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0089] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0090] Some embodiments of the present application are described in detail. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0091] Embodiments

[0092] Reference Figure 1 and Figure 2 The present embodiment provides a light-cured 3D printer 300, comprising a bottom plate assembly 301, a plurality of first shafts 302, a middle plate assembly 303, a tray assembly 304, a lifting platform assembly 305, a driving assembly 306 and a light source 307.

[0093] The middle plate assembly 303 is supported and connected above the bottom plate assembly 301 by the plurality of first shafts 302. The tray assembly 304 is used to accommodate light-cured materials, and the tray assembly 304 is supported on the middle plate assembly 303. The lifting platform assembly 305 comprises a bottom platform 308, a plurality of second shafts 309 and a light-cured 3D printer forming platform locking mechanism 100, which comprises a locking frame 10 and a forming platform 11. The bottom platform 308 is slidably fitted on the plurality of first shafts 302 and located between the bottom plate assembly 301 and the middle plate assembly 303; the plurality of second shafts 309 respectively slidably pass through the middle plate assembly 303, and support the locking frame 10 on the side of the middle plate assembly 303 away from the bottom platform 308; the forming platform 11 is used to adhere to the cured model. The forming platform 11 is supported on the locking frame 10 and corresponds to the tray assembly 304 in the lifting direction of the lifting platform assembly 305. The driving assembly 306 is drivingly connected to the lifting platform assembly 305, for driving the lifting platform assembly 305 to move, so that the forming platform 11 approaches or moves away from the tray assembly 304. The light source 307 is used to provide light for curing the light-cured materials.

[0094] In the present embodiment, the driving assembly 306 comprises a motor 310 and a screw nut assembly 311, the motor 310 is drivingly connected to the screw nut assembly 311, the screw nut assembly 311 is drivingly connected to the lifting platform assembly 305, and the screw nut assembly 311 converts the rotary motion of the motor 310 into linear motion to drive the lifting platform assembly 305 to lift.

[0095] Optionally, the bottom plate assembly 301, the middle plate assembly 303, the bottom platform 308 and the locking frame 10 are all substantially rectangular structures, and the first shaft 302 and the second shaft 309 are both four, which are respectively supported near the four corners of the rectangle.

[0096] In use, the forming platform 11 is installed on the locking frame 10, and the tray assembly 304 is filled with liquid photocurable material (such as photocurable resin), and the forming platform 11 is immersed in the bottom of the photocurable material. The bottom wall of the tray assembly 304 is a light-transmitting structure, and the light (such as ultraviolet light) emitted by the light source 307 of the photocurable 3D printer 300 is transmitted through the bottom wall of the tray assembly 304 and then irradiated on the photocurable material, so that a layer of photocurable material is cured and formed on the forming platform 11; then the forming platform 11 is moved up by one layer with the lifting platform assembly 305, and the liquid photocurable material filled into the vicinity of the bottom wall is irradiated and cured again to be connected to the last layer of cured material; and the cycle is repeated until all layers are cured, and the printed model on the forming platform 11 is obtained.

[0097] After printing is completed, the forming platform 11 is removed, and the printed model after printing is taken off from the forming platform 11. The forming platform 11 can be installed and used again after cleaning.

[0098] During the installation of the forming platform 11, if the locking position is not accurate or the locking is not reliable, the model position may shake during printing, which will affect the quality of the formed model.

[0099] The photocurable 3D printer forming platform locking mechanism 100 provided in the embodiment has the effects of convenient installation and removal of the forming platform 11 and reliable positioning, which is beneficial to ensure the quality of model printing. The following will be specifically introduced.

[0100] Figures 3-11 The photocurable 3D printer forming platform locking mechanism 100 in the embodiment of the application is shown.

[0101] The photocurable 3D printer forming platform locking mechanism 100 provided in the embodiment includes a forming platform 11 and a locking frame 10.

[0102] The forming platform 11 is provided with a first edge L1 and a second edge L2 opposite in a first direction Y1 and two side edges L3 opposite in a second direction Y2; the forming platform 11 includes a first lug 12, which protrudes from the first edge L1 to the side away from the second edge L2; the forming platform 11 includes two second lugs 13, which respectively protrude outward from the two side edges L3; and the second direction Y2 is perpendicular to the first direction Y1.

[0103] The locking frame 10 comprises a first frame plate 14, two second frame plates 15 and a locking structure 16, the two second frame plates 15 are respectively connected to the two ends of the first frame plate 14, forming a shape of a close U-shaped frame, and the four second shaft members 309 are respectively supported at the intersection of the first frame plate 14 and the second frame plate 15 and the outer end of the second frame plate 15 of the locking frame 10.

[0104] In the embodiment, the forming platform 11 comprises a forming plate 17, a surrounding plate 18, a first protruding edge 19 and a second protruding edge 20. The forming plate 17 is used for attaching the printed part, and can be a porous plate with a plurality of small holes distributed on the plate surface, facilitating the drainage of the resin in the tray assembly 304, avoiding the overflow of the resin from the tray assembly 304, and also facilitating the use of the corresponding shovel tooling to remove the model in the post-processing process. The surrounding plate 18 is connected to the outer periphery of the forming plate 17, so that the surrounding plate 18 and the forming plate 17 form a box-shaped structure with an upward opening. The first protruding edge 19 and the second protruding edge 20 extend outwardly from the two side edges of the surrounding plate 18 along the first direction Y1 respectively. The first lug 12 is arranged on the first protruding edge 19, and the two second lugs 13 are respectively arranged at the two ends of the second protruding edge 20 along the second direction Y2. The forming platform 11 with the above structure, the first lug 12 and the second lug 13 at the first protruding edge 19 and the second protruding edge 20 are fixed with the locking frame 10, so that the forming plate 17 for attaching the printed part is concave downward, facilitating the insertion into the tray assembly 304 to receive the printed and solidified model.

[0105] The first frame plate 14 is provided with a first sliding groove C1, and the two second frame plates 15 are respectively provided with a second sliding groove C2; the first sliding groove C1 is matched with the first lug 12, and the second sliding groove C2 is matched with the second lug 13; the first sliding groove C1 and the second sliding groove C2 jointly define a first position W1 and a second position W2 for cooperating with the forming platform 11; in the first position W1, the first sliding groove C1 and the second sliding groove C2 are respectively penetrated to the top surface of the locking frame 10 along the third direction Y3, and the first sliding groove C1 and the second sliding groove C2 are respectively penetrated to the top surface of the locking frame 10 along the third direction Y3, for allowing the first lug 12 of the forming platform 11 to enter and be supported on the groove bottom surface of the first sliding groove C1 along the third direction Y3, and allowing the second lug 13 of the forming platform 11 to enter and be supported on the groove bottom surface of the second sliding groove C2 along the third direction Y3; in the second position W2, the first sliding groove C1 is provided with a first abutting protrusion 21 corresponding to the groove bottom surface of the first sliding groove C1 along the third direction Y3, and the second sliding groove C2 is provided with a second abutting protrusion 22 corresponding to the groove bottom surface of the second sliding groove C2 along the third direction Y3; the third direction Y3 is perpendicular to the first direction Y1 and the third direction Y3 is perpendicular to the second direction Y2; the locking structure 16 is connected to the second frame plate 15 and can push the forming platform 11 from the first position W1 along the first direction Y1 and lock it in the second position W2; in the second position W2, the first lug 12 is limited between the groove bottom surface of the first sliding groove C1 and the first abutting protrusion 21, and the second lug 13 is limited between the groove bottom surface of the second sliding groove C2 and the second abutting protrusion 22.

[0106] When the forming platform 11 needs to be installed, the forming platform 11 is placed in the first position W1 of the locking frame 10, specifically, the first lug 12 is entered and supported on the groove bottom surface of the first sliding groove C1 along the third direction Y3, and the second lug 13 is entered and supported on the groove bottom surface of the second sliding groove C2 along the third direction Y3; then, the locking structure 16 is used to push the forming platform 11 along the first direction Y1, so that the forming platform 11 moves along the first direction Y1 to position the first lug 12 between the first abutting protrusion 21 and the groove bottom surface of the first sliding groove C1, and position the second lug 13 between the second abutting protrusion 22 and the groove bottom surface of the second sliding groove C2, to complete the positioning and locking of the forming platform 11.

[0107] In the embodiment, the locking structure 16 comprises a cam handle 23, which comprises a cam portion 24 and a handle portion 25 connected with each other. The cam portion 24 is eccentrically rotatably connected to the second frame plate 15 and can be rotated to press the forming platform 11 along the first direction Y1 to be locked in the second position W2, or to unlock the forming platform 11 to allow the forming platform 11 to exit to the first position W1 and exit from the first position W1 along the third direction Y3 to be separated from the locking frame 10. Optionally, the locking structure 16 has two, and the two locking structures 16 are respectively connected to the two second frame plates 15 away from the first frame plate 14, for pressing the second lug 13 away from the side surface of the first frame plate 14.

[0108] The connection mode of the cam handle 23 on the second frame plate 15 can be that a rotating sleeve 26 is connected on the second frame plate 15, and the cam portion 24 of the cam handle 23 is provided with an eccentric hole K1, and the cam handle 23 is sleeved on the rotating sleeve 26 through the eccentric hole K1, so as to realize the rotatable arrangement of the cam handle 23.

[0109] In the embodiment, through the first lug 12 and the second lugs 13 on both sides, the positioning and locking of the forming platform 11 in the plane (the first direction Y1 and the second direction Y2) and in the vertical direction (the third direction Y3) can be realized, which is convenient to use, accurate in positioning, and beneficial to ensure the printing quality.

[0110] In the embodiment, optionally, the first lug 12 has two, and the two first lugs 12 are arranged in the second direction Y2. The two first lugs 12 are arranged to facilitate the positioning of the forming platform 11 on both sides in the second direction Y2, and to improve the positioning accuracy and stability.

[0111] Optionally, the cross section of the first lug 12 in the plane perpendicular to the third direction Y3 is an isosceles trapezoid with the width outside small and the width inside large; the first sliding groove C1 is adapted to the isosceles trapezoid of the first lug 12, and in the second position W2, the two side slopes P1 of the isosceles trapezoid of the first lug 12 are wedge-shaped and abut against the two side groove surfaces P2 of the first sliding groove C1. The outer edge of the side of the first lug 12 away from the groove bottom surface of the first sliding groove C1 is provided with a first chamfer P3; the side surface of the first abutting protrusion 21 facing the groove bottom surface of the first sliding groove C1 comprises a first slope P4, which is used for wedge-shaped cooperation with the first chamfer P3.

[0112] The inclined wedge cooperation between the first lug 12 and the first sliding groove C1 makes the first lug 12 guided by the groove surfaces P2 on both sides of the first sliding groove C1 during sliding into the first sliding groove C1 along the first direction Y1, and finally forms the inclined surface cooperation, which can ensure that the first lug 12 of the forming platform 11 is accurately positioned on the first direction Y1 and the second direction Y2 of the locking frame 10. At the same time, the first chamfer P3 of the first lug 12 is cooperated with the first inclined surface P4 of the first abutting protrusion 21, which can realize the limiting and pressing of the third direction Y3 of the first lug 12 on the one hand, and avoid the deviation of the first lug 12 in the third direction Y3 during printing, and on the other hand, the inclined wedge cooperation between the first chamfer P3 and the first inclined surface P4 also ensures the positioning accuracy of the two in the third direction Y3.

[0113] In the embodiment, the second lug 13 has an abutting inclined surface P5, which is obliquely intersected with the first direction Y1 and obliquely faces the first side L1; the second sliding groove C2 has an abutting groove surface P6 corresponding to the abutting inclined surface P5, and the abutting inclined surface P5 and the abutting groove surface P6 correspond at the second position W2. Optionally, the second lug 13 is a right-angled triangle as a whole, and the abutting inclined surface P5 is the hypotenuse of the right-angled triangle. One of the right angles of the right-angled triangle is collinear with the outer edge line of the second lug 20, and the other right angle is attached to the two side plates 18. The abutting inclined surface P5 is provided with a second chamfer P7 away from the groove bottom surface of the second sliding groove C2; the surface of the second abutting protrusion 22 facing the groove bottom surface of the second sliding groove C2 includes a second inclined surface P8, which is used for inclined wedge cooperation with the second chamfer P7.

[0114] The inclined wedge cooperation between the second lug 13 and the second sliding groove C2 makes the second lug 13 guided by the abutting groove surface P6 of the second sliding groove C2 during sliding into the second sliding groove C2 along the first direction Y1, and finally forms the inclined surface cooperation, which can ensure that the second lug 13 of the forming platform 11 is accurately positioned on the first direction Y1 and the second direction Y2 of the locking frame 10. At the same time, the second chamfer P7 of the second lug 13 is cooperated with the second inclined surface P8 of the second abutting protrusion 22, which can realize the limiting and pressing of the third direction Y3 of the second lug 13 on the one hand, and avoid the deviation of the second lug 13 in the third direction Y3 during printing, and on the other hand, the inclined wedge cooperation between the second chamfer P7 and the second inclined surface P8 also ensures the positioning accuracy of the two in the third direction Y3.

[0115] In summary, the forming platform 11 in the embodiment of the present application is realized by the sliding cooperation of the first shaft 302 and the second shaft 309, and the non-cantilever lifting support is achieved, which is stable in lifting, small in lateral deviation, and beneficial to improve the stable lifting of the forming platform 11, and ensure the printing precision and printing quality. Meanwhile, the forming platform 11 is reliably positioned in the first sliding groove C1 and the second sliding groove C2 of the locking frame 10 at the two first lugs 12 and the two second lugs 13 in the first direction Y1, the second direction Y2 and the third direction Y3, and is locked in the first direction Y1 through the two locking structures 16, so that the whole forming platform 11 can be fully positioned on the locking frame 10, which is convenient to use, high in positioning precision, and does not need to use screws to simultaneously realize positioning and locking, and can still maintain good positioning and locking after long time use.

[0116] The above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application is described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application.

Claims

1. A photocured 3D printer build platform locking mechanism, characterized in that, Comprise: The forming platform comprises a forming plate, a surrounding plate, a first convex edge and a second convex edge, the surrounding plate is connected to the outer periphery of the forming plate, the first convex edge and the second convex edge are respectively extended outward from the two side edges of the surrounding plate in the first direction; the forming platform comprises a first lug, the first lug is provided on the first convex edge, the first lug protrudes from the first edge to the side away from the second edge; the forming platform comprises two second lugs, the two second lugs are respectively provided on the two ends of the second convex edge in the second direction, and the two second lugs respectively protrude outward from the two side edges; the second direction is perpendicular to the first direction; The locking frame comprises a first frame plate, two second frame plates and a locking structure, the two second frame plates are respectively connected to the two ends of the first frame plate; the first frame plate is provided with a first sliding groove, and the two second frame plates are respectively provided with a second sliding groove; the first sliding groove and the first lug are matched, and the second sliding groove and the second lug are matched; the first sliding groove and the second sliding groove jointly define a first position and a second position for matching the forming platform; in the first position, the first sliding groove and the second sliding groove respectively penetrate to the top surface of the locking frame along the third direction, for allowing the first lug of the forming platform to enter and support on the groove bottom surface of the first sliding groove along the third direction, and allowing the second lug of the forming platform to enter and support on the groove bottom surface of the second sliding groove along the third direction; in the second position, the first frame plate abuts against the first lug along the third direction, so as to limit the first lug from leaving the first sliding groove along the third direction; the third direction is perpendicular to the first direction and perpendicular to the second direction; the locking structure is connected to the second frame plate and can push the forming platform from the first position to the second position along the first direction and lock it; in the second position, the second frame plate abuts against the second lug along the third direction, so as to limit the second lug from leaving the second sliding groove along the third direction.

2. The forming platform locking mechanism of the photocuring 3D printer according to claim 1, wherein: The first frame plate is provided with a first abutting protrusion corresponding to the groove bottom surface of the first sliding groove in the third direction, and in the second position, the first lug is limited between the groove bottom surface of the first sliding groove and the first abutting protrusion; The second frame plate is provided with a second abutting protrusion corresponding to the groove bottom surface of the second sliding groove in the third direction, and in the second position, the second lug is limited between the groove bottom surface of the second sliding groove and the second abutting protrusion.

3. The forming platform locking mechanism of the photocuring 3D printer according to claim 2, wherein: The first lug has two, and the two first lugs are arranged in the second direction.

4. The forming platform locking mechanism of the photocuring 3D printer according to claim 1, wherein: The first lug has a cross section shape of an isosceles trapezoid with a wide outside and a narrow inside in a plane perpendicular to the third direction; the first sliding groove is adapted to the isosceles trapezoid of the first lug, and in the second position, two side inclined surfaces of the isosceles trapezoid of the first lug abut against two side groove surfaces of the first sliding groove.

5. The light-curing 3D printer forming platform locking mechanism of claim 2, wherein: The first lug is provided with a first chamfer at an outer edge of a side of the first sliding groove away from a groove bottom surface; The first abutting protrusion comprises a first inclined surface facing a side surface of the side of the first sliding groove away from the groove bottom surface, and the first inclined surface is adapted to abut against the first chamfer.

6. The light-curing 3D printer forming platform locking mechanism of claim 2, wherein: The second lug has an abutting inclined surface which is obliquely intersected with the first direction and obliquely faces the side of the first edge; the second sliding groove has an abutting groove surface corresponding to the abutting inclined surface, and in the second position, the abutting inclined surface and the abutting groove surface correspond to each other.

7. The light-curing 3D printer forming platform locking mechanism of claim 6, wherein: The abutting inclined surface is provided with a second chamfer away from a side of the second sliding groove away from a groove bottom surface; The second abutting protrusion comprises a second inclined surface facing a side surface of the side of the second sliding groove away from the groove bottom surface, and the second inclined surface is adapted to abut against the second chamfer.

8. The light-curing 3D printer forming platform locking mechanism of claim 1, wherein: The locking mechanism comprises a cam handle which comprises a cam portion and a handle portion connected to each other, the cam portion is eccentrically rotatably connected to the second frame plate and can be rotated to abut against and push the forming platform to the second position to lock the forming platform or to be unlocked.

9. A light-cured 3D printer, characterized by comprises: a bottom plate assembly; a plurality of first shafts; a middle plate assembly supported and connected above the bottom plate assembly by the plurality of first shafts; a tray assembly for containing light-curing material, the tray assembly being supported on the middle plate assembly; a lifting platform assembly comprising a bottom platform, a plurality of second shafts and the light-curing 3D printer forming platform locking mechanism of any one of claims 1-8; the bottom platform is slidably connected to the plurality of first shafts and located between the bottom plate assembly and the middle plate assembly; the plurality of second shafts are respectively slidably connected through the middle plate assembly and support the locking frame on a side of the middle plate assembly away from the bottom platform; the forming platform is used for attaching a solidified model and is supported on the locking frame and corresponds to the tray assembly in a lifting direction of the lifting platform assembly; a driving assembly drivingly connected to the lifting platform assembly for moving the lifting platform assembly to move the forming platform closer to or farther away from the tray assembly; a light source for providing light for curing the light-curing material.

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