Printing platform assembly and three-dimensional printer

Abstract

The utility model discloses a printing platform assembly and a three-dimensional printer, relates to the technical field of three-dimensional printing, mainly aims to avoid damage to a model and a printing platform during demolding, and adopts the main technical scheme that the printing platform assembly is applied to the three-dimensional printer and comprises a bracket, the support is used for being connected with a lifting mechanism of the three-dimensional printer and comprises a printing area and a non-printing area. The force application piece is arranged on the bracket; the printing platform is connected with the force application part, the printing platform is a flexible part, part of the printing platform is located in the printing area, and part of the printing platform is located in the non-printing area; the force applying part is used for applying force to the printing platform so that the position of the printing platform can be changed, the printing platform of at least part of the printing area moves to the non-printing area, and the printing platform of at least part of the non-printing area moves to the printing area.

Description

Technical Field

[0001] The utility model relates to the technical field of three-dimensional printing equipment, in particular to a printing platform component and a three-dimensional printer. Background Art

[0002] A photocurable 3D printer generally applies light to a photosensitive material through a light source so that the liquid photosensitive material is cured on a printing platform to form a 3D solid model.

[0003] Currently, the method of removing the model from the printing platform is usually manual removal. Specifically, the model is scraped off the printing platform with a tool or directly pulled off by hand, which not only easily destroys the model, but also easily damages the printing surface of the printing platform. Utility Model Content

[0004] In view of this, an embodiment of the utility model provides a printing platform assembly and a three-dimensional printer, the main purpose of which is to avoid damage to the model and the printing platform during demoulding.

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

[0006] On the one hand, an embodiment of the utility model provides a printing platform assembly, which is applied to a three-dimensional printer, including:

[0007] A bracket, the bracket is used to be connected to the lifting mechanism of the 3D printer, and the bracket includes a printing area and a non-printing area;

[0008] A force applying member, wherein the force applying member is arranged on the bracket;

[0009] A printing platform, the printing platform is connected to the force-applying member, the printing platform is a flexible member, part of the printing platform is located in the printing area, and part of the printing platform is located in the non-printing area;

[0010] The force applying member is used to apply force to the printing platform to change the position of the printing platform, wherein at least part of the printing platform in the printing area moves to the non-printing area, and at least part of the printing platform in the non-printing area moves to the printing area.

[0011] Optionally, the printing platform of the printing area and the printing platform of at least part of the non-printing area are not in the same plane;

[0012] The printing platform is annular, and has a bending position located in the non-printing area, and a portion of the printing platform located in the bending position is in a bent state;

[0013] The outer surface of the printing platform includes a printing surface located in the printing area;

[0014] The force applying member is used to apply force to the printing platform to drive the printing platform to move along its extension trajectory, so that at least a portion of the printing surface moves to the bending position.

[0015] Optionally, the force applying member includes a first roller and a second roller, and both the first roller and the second roller are rotatably disposed on the bracket;

[0016] The printing platform is sleeved on the outer circumference of the first roller and the second roller;

[0017] The position on the printing platform that is in contact with the first roller or the second roller is a bent position; the printing surface is located between the first roller and the second roller;

[0018] The first roller and / or the second roller are used to rotate to apply friction force to the printing platform to drive the printing platform to move along its extension track.

[0019] Optionally, the printing platform includes a first mounting surface opposite to the printing surface;

[0020] The bracket includes a mounting plate, the mounting plate is located inside the printing platform, the mounting plate includes a second mounting surface facing the first mounting surface, and the second mounting surface is a plane;

[0021] The first mounting surface is in contact with the second mounting surface.

[0022] Optionally, a first magnetic member is disposed on the mounting plate, and the printing platform is a second magnetic member, and the first magnetic member is magnetically connected to the second magnetic member so that the first mounting surface is fitted to the second mounting surface;

[0023] or,

[0024] The mounting plate is a third magnetic member; a fourth magnetic member is disposed on the printing platform, and the third magnetic member is magnetically connected to the fourth magnetic member so that the first mounting surface is fitted to the second mounting surface;

[0025] or,

[0026] The mounting plate is a fifth magnetic member, the printing platform is a sixth magnetic member, and the fifth magnetic member is magnetically connected to the sixth magnetic member so that the first mounting surface is in contact with the second mounting surface;

[0027] or,

[0028] A seventh magnetic component is disposed on the mounting plate; an eighth magnetic component is disposed on the printing platform, and the seventh magnetic component is magnetically connected to the eighth magnetic component so that the first mounting surface is fitted with the second mounting surface.

[0029] Optionally, if the mounting plate is provided with a first magnetic member and the printing platform is a second magnetic member, a plurality of mounting through holes are provided on the second mounting surface of the mounting plate;

[0030] There are multiple first magnetic components, and the first magnetic components are arranged in corresponding mounting through holes.

[0031] Optionally, the mounting through hole passes through the mounting plate;

[0032] A plurality of the mounting through holes are arranged in an array on the mounting plate;

[0033] An end surface of the first magnetic member is flush with the second mounting surface.

[0034] Optionally, the printing platform assembly further includes:

[0035] A tensioning member is arranged on the bracket and is used to adjust the tension of the printing platform.

[0036] Optionally, the first roller and / or the second roller is rotatably connected to the bracket via a rotating shaft;

[0037] The tensioning member includes an adjusting member, the rotating shaft is connected to the bracket via the adjusting member, and the adjusting member is used to adjust the position of the rotating shaft on the bracket.

[0038] Optionally, a first adjusting hole is formed on the adjusting member, and the first adjusting hole is an elongated hole and extends along the arrangement direction of the first roller and the second roller;

[0039] The bracket is provided with a second adjustment hole, and fasteners are connected in the second adjustment hole and the first adjustment hole.

[0040] On the other hand, an embodiment of the present invention further provides a three-dimensional printer, including the aforementioned printing platform assembly.

[0041] By means of the above technical solution, the utility model has at least the following beneficial effects:

[0042] The technical solution provided by the embodiment of the utility model is that a force-applying member is arranged on the bracket, the printing platform is connected to the force-applying member, the printing platform is a flexible member, and part of the printing platform is located in the printing area of ​​the bracket, and part of the printing platform is located in the non-printing area of ​​the bracket. The force-applying member can be used to apply force to the printing platform to change the position of the printing platform. When the model printing is finished, the force-applying member can be controlled to apply force to the printing platform, so that the position of the printing platform changes, at least part of the printing platform in the printing area moves to the non-printing area, and at least part of the printing platform in the non-printing area moves to the printing area, so that the printing platform will be deformed and bent, while the model is rigid and not easy to deform. In this way, as the printing platform moves to the non-printing area, the model bonded to the printing platform in the printing area can be separated from the printing platform more easily, and, in conjunction with the self-gravity of the model, the model can be easily and quickly detached from the printing platform without causing damage to the model and the printing platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A schematic structural diagram of a printing platform assembly provided by an embodiment of the utility model at a first viewing angle;

[0044] Figure 2 A schematic structural diagram of a printing platform assembly provided by an embodiment of the utility model at a second viewing angle;

[0045] Figure 3 for Figure 2 AA section view;

[0046] Figure 4 An exploded schematic diagram of a printing platform assembly provided by an embodiment of the utility model;

[0047] Figure 5 A schematic diagram of the structure of an adjusting member in a printing platform assembly provided by an embodiment of the utility model;

[0048] Figure 6 A schematic diagram of the partial structure of a side plate of a bracket in a printing platform assembly provided in an embodiment of the utility model.

[0049] Description of reference numerals:

[0050] 1-bracket; 11-mounting plate; 12-side plate; 121-second adjustment hole; 13-top plate; 14-docking block; 111-mounting through hole; 2-force member; 21-first roller; 211-rotating shaft; 22-second roller; 3-printing platform; 31-printing surface; 32-bending position; 33-first mounting surface; 4-first magnetic member; 5-adjusting member; 51-first adjustment hole; 6-cover plate. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be described in more detail below in conjunction with the accompanying drawings in the preferred embodiments of the present invention.

[0052] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the utility model provides a printing platform assembly, which is applied to a 3D printer. Specifically, the 3D printer can be a photocuring 3D printer. The printing platform assembly can include a bracket 1, which is used to connect with the lifting mechanism of the 3D printer so that the lifting mechanism can drive the printing platform assembly to perform lifting movement to print the model. The bracket 1 can include a printing area and a non-printing area; a force-applying member 2, which is arranged on the bracket 1; a printing platform 3, which is connected to the force-applying member 2, and the printing platform 3 is a flexible member, and part of the printing platform 3 is located in the printing area, and part of the printing platform 3 is located in the non-printing area; the force-applying member 2 is used to apply force to the printing platform 3 to change the position of the printing platform 3, wherein at least part of the printing area of ​​the printing platform 3 moves to the non-printing area, and at least part of the non-printing area of ​​the printing platform 3 moves to the printing area.

[0053] The printing area may be an area corresponding to the printing surface 31 of the printing platform 3, and the non-printing area may be an area corresponding to other positions on the printing platform 3 except the printing surface 31. The printing surface 31 is used to bond the model. The printing surface 31 is used to print the model. As the position of the printing platform 3 changes, part of the printing surface 31 will become the non-printing surface, and the non-printing surface will become the printing surface 31. Those skilled in the art will know that Figure 3 In the embodiment, the lower surface of the printing platform assembly is the printing surface 31. The printing platform 3 in the printing area and the printing platform 3 in at least a part of the non-printing area are not in the same plane.

[0054] Among them, the position change of the printing platform 3 may include movement and / or rotation of the printing platform 3, as long as it can be achieved that at least part of the printing area of ​​the printing platform 3 is moved to the non-printing area, and at least part of the non-printing area of ​​the printing platform 3 is moved to the printing area.

[0055] The force-applying member 2 may have a variety of structural forms, as long as it can apply force to the printing platform 3 to change the position of the printing platform 3. For example, the force-applying member 2 may include a telescopic rod and an abutment rod connected to the telescopic rod. After the model is printed, the telescopic rod may be controlled to extend so that the abutment rod applies an abutment force to the printing platform 3, thereby changing the position of the printing platform 3. The force-applying member 2 may also be a component that facilitates the user to apply force. The user may manually drive the printing platform 3 through the force-applying member 2 to change the position of the printing platform 3.

[0056] The printing platform assembly provided by the embodiment of the utility model has a force-applying member 2 arranged on the bracket 1, the printing platform 3 is connected to the force-applying member 2, and the printing platform 3 is a flexible member, and part of the printing platform 3 is located in the printing area of ​​the bracket 2, and part of the printing platform 3 is located in the non-printing area of ​​the bracket 1, and the force-applying member 2 can be used to apply force to the printing platform 3 to change the position of the printing platform 3. When the model printing is finished, the force-applying member 2 can be controlled to apply force to the printing platform 3, so that the position of the printing platform 3 changes, at least part of the printing area of ​​the printing platform 3 moves to the non-printing area, and at least part of the printing platform 3 of the non-printing area moves to the printing area, so that the printing platform 3 will be deformed and bent, while the model is rigid and not easy to deform, so that as the printing platform 3 moves to the non-printing area, the model bonded to the printing platform 3 in the printing area can be easily separated from the printing platform 3, and with the self-gravity of the model, the model can be easily and quickly separated from the printing platform without causing damage to the model and the printing platform 3.

[0057] In some embodiments, see Figure 1 , Figure 3 and Figure 4 The printing platform 3 may be annular, and the printing platform 3 has a bending position 32 located in the non-printing area, and the portion of the printing platform 3 at the bending position 32 is in a bent state; the outer surface of the printing platform 3 includes a printing surface 31 located in the printing area; the force applying member 2 is used to apply force to the printing platform 3 to drive the printing platform 3 to move along its extension trajectory, so that at least a portion of the printing surface 31 moves to the bending position 32. Specifically, the printing platform 3 may be an annular steel plate.

[0058] In the above embodiment, the printing platform 3 can be in the shape of a flattened ring, with its two sides in a horizontal state, the printing surface 31 can be located on one side, and the two ends of the printing platform 3 are in a bent state, and both ends can be bent positions 32.

[0059] The force applying member 2 can apply force to the printing platform 3 to drive the printing platform 3 to move along its extension trajectory, so that the printing surface 31 can move toward the bending position 32, until at least a portion of the printing surface 31 moves to the bending position 32, at which time at least a portion of the printing surface 31 changes from a plane to a curved surface. That is, at least a portion of the printing surface 31 is deformed, thereby reducing the bonding area between the model and the printing surface 31, thereby reducing the bonding stability of the model on the printing surface 31, and facilitating the model to be separated from the printing surface 31.

[0060] When the model is printed, the force-applying member 2 can be controlled to drive the printing platform 3 to move along its extension trajectory, so that at least part of the printing surface 31 moves to the bending position 32 and bends. In this way, the model can be easily and quickly detached from the printing surface 31 by combining its own gravity without causing damage to the model and the printing platform 3.

[0061] The force applying direction of the force applying member 2 on the printing platform 3 may be along the extension track of the printing platform 3 , so that the printing platform 3 moves along its extension track.

[0062] It should be noted that, during demolding, compared with the solution of dividing the printing platform 3 into multiple blocks and rotating each block individually, the printing platform 3 in the present application moves as a whole along its extended trajectory, which is not only simple in structure and easy to implement, but also can avoid the failure of demolding caused by the failure of a single block, and the demolding reliability is higher.

[0063] In some embodiments, see Figure 3 and Figure 4 , the force applying member 2 may include a first roller 21 and a second roller 22, both of which are rotatably arranged on the bracket 1; the printing platform 3 is sleeved on the outer periphery of the first roller 21 and the second roller 22; the position on the printing platform 3 that fits with the first roller 21 or the second roller 22 is a bending position 32; the printing surface 31 is located between the first roller 21 and the second roller 22; the first roller 21 and / or the second roller 22 are used to rotate to apply friction to the printing platform 3 to drive the printing platform 3 to move along its extension trajectory. It can be understood that in order to increase the friction between the first roller 21, the second roller 22 and the printing platform 3, the roughness of the contact surface between the first roller 21, the second roller 22 and the printing platform 3 can be increased, or the pressure between the first roller 21 and the second roller 22 and the printing platform 3 can be increased.

[0064] If the first roller 21 and the second roller 22 rotate simultaneously, the rotation directions of the two are the same. When the first roller 21 and / or the second roller 22 rotate, the first roller 21 and / or the second roller 22 can apply friction force to the printing platform 3, thereby driving the printing platform 3 to move along its extension track.

[0065] The printing surface 31 is located between the first roller 21 and the second roller 22; the position on the printing platform 3 that is in contact with the first roller 21 or the second roller 22 is the bending position 32, that is, the portion of the printing platform 3 that is sleeved on the outer periphery of the first roller 21 or the second roller 22 is in a bent state. When the first roller 21 and / or the second roller 22 rotates, the printing surface 31 gradually moves onto the first roller 21 or the second roller 22 until at least part of the printing surface 31 moves onto the first roller 21 or the second roller 22, that is, reaches the bending position 32 and is bent, and demolding can be successfully completed at this time.

[0066] It is understandable that the first roller 21 and / or the second roller 22 can be driven manually or automatically. Specifically, the first roller 21 and / or the second roller 22 can be driven by a driving member such as a motor so that the first roller 21 and / or the second roller 22 rotate automatically.

[0067] In order to ensure the flatness of the printing surface 31 and improve the printing quality of the model. Figure 3 and Figure 4 The printing platform 3 may include a first mounting surface 33 opposite to the printing surface 31; the bracket 1 may include a mounting plate 11, the mounting plate 11 is located inside the printing platform 3, the mounting plate 11 includes a second mounting surface facing the first mounting surface 33, and the second mounting surface may be a plane; the first mounting surface 33 is in contact with the second mounting surface.

[0068] Since the first mounting surface 33 fits the second mounting surface and the second mounting surface is a plane, the printing surface 31 opposite to the first mounting surface 33 can remain a plane, thereby ensuring the flatness of the printing surface 31 and further improving the printing quality of the model.

[0069] It can be understood that there are many ways to fit the first mounting surface 33 and the second mounting surface to ensure the flatness of the printing surface 31. For example, card slots can be set on the two side edges of the printing platform 3, so that the printing platform 3 is connected to the mounting plate 11 through the corresponding card slots, so that the printing platform 3 is supported on the mounting plate 11. In this way, on the one hand, the printing platform 3 can be slidably connected to the mounting plate 11 through the card slots, so that the printing platform 3 can move along its extension track; on the other hand, the mounting plate 11 can support the printing platform 3 so that the printing surface 31 always remains flat.

[0070] For ease of use, in some embodiments, a first magnetic component 4 may be provided on the mounting plate 11, and the printing platform 3 may be a second magnetic component, and the first magnetic component 4 is magnetically connected to the second magnetic component so that the first mounting surface 33 is in contact with the second mounting surface; or, the mounting plate 11 may be a third magnetic component; a fourth magnetic component may be provided on the printing platform 3, and the third magnetic component is magnetically connected to the fourth magnetic component so that the first mounting surface 33 is in contact with the second mounting surface; or, the mounting plate 11 may be a fifth magnetic component, and the printing platform 3 may be a sixth magnetic component, and the fifth magnetic component is magnetically connected to the sixth magnetic component so that the first mounting surface 33 is in contact with the second mounting surface; or, a seventh magnetic component is provided on the mounting plate 11; an eighth magnetic component is provided on the printing platform 3, and the seventh magnetic component is magnetically connected to the eighth magnetic component so that the first mounting surface 33 is in contact with the second mounting surface.

[0071] That is to say, the mounting plate 11 and the printing platform 3 can attract each other through the magnetic force generated by the magnetic member, so that the first mounting surface 33 and the second mounting surface are fitted together, and the magnetic member can be additionally provided on the mounting plate 11 or the printing platform 3, or can be the mounting plate 11 or the printing platform 3 itself, as long as the magnetic connection between the mounting plate 11 and the printing platform 3 can be achieved. Such a structural setting can not only ensure that the printing platform 3 moves smoothly along its extension track, but also ensure the reliable fitting between the first mounting surface 33 and the second mounting surface.

[0072] The magnetic part may be a magnetic part with magnetism, such as a ferromagnetic material including metals such as iron, cobalt, and nickel, or a part that can be magnetic after being magnetized, such as a metal part.

[0073] In some embodiments, see Figure 3 and Figure 4 If a first magnetic component 4 is provided on the mounting plate 11 and the printing platform 3 is a second magnetic component, a plurality of mounting through holes 111 may be provided on the second mounting surface of the mounting plate 11; the number of the first magnetic components 4 is multiple, and the first magnetic components 4 are provided in corresponding mounting through holes 111.

[0074] Among them, the first magnetic part 4 is arranged in the corresponding mounting through hole 111, so that the mounting plate 11 is covered with the first magnetic parts 4, and the printing platform 3 can be an annular steel plate, so that the printing platform 3 can be tightly attached to the second mounting surface under the magnetic attraction of multiple first magnetic parts 4, thereby ensuring the flatness of the printing surface 31.

[0075] In some embodiments, see Figure 3 and Figure 4 The mounting through hole 111 can pass through the mounting plate 11; multiple mounting through holes 111 can be arranged in an array on the mounting plate 11, so that multiple first magnetic parts 4 are arranged in an array on the second mounting surface. This can improve the uniformity of the magnetic force applied by the multiple first magnetic parts 4 to the first mounting surface, thereby further improving the flatness of the printing surface 31.

[0076] In some embodiments, the end surface of the first magnetic member 4 is flush with the second mounting surface to ensure the overall flatness of the second mounting surface, thereby ensuring the flatness of the printing surface 31 .

[0077] In some embodiments, the printing platform assembly may further include a tensioning member, which is disposed on the bracket 1 and is used to adjust the tension of the printing platform 3, thereby ensuring that the printing platform 3 is sleeved on the first roller 21 and the second roller 22 with moderate tension, so as to facilitate the first roller 21 and / or the second roller 22 to drive the printing platform 3 to move smoothly along its extension trajectory.

[0078] In some embodiments, see Figure 4 , the first roller 21 and / or the second roller 22 are rotatably connected to the bracket 1 through the rotating shaft 211; the tensioning member may include an adjusting member 5, the rotating shaft 211 is connected to the bracket 1 through the adjusting member 5, and the adjusting member 5 is used to adjust the position of the rotating shaft 211 on the bracket 1, thereby changing the distance between the first roller 21 and the second roller 22, and then adjusting the tension of the printing platform 3. Among them, a bearing may be provided on the adjusting member 5, and the rotating shaft 211 is rotatably connected to the adjusting member 5 through the bearing.

[0079] In some embodiments, see Figure 4 , Figure 5 and Figure 6 A first adjustment hole 51 may be provided on the adjustment member 5, and the first adjustment hole 51 may be a long strip hole, i.e., a waist-shaped hole, and extends along the arrangement direction of the first roller 21 and the second roller 22; a second adjustment hole 121 may be provided on the bracket 1, and fasteners such as bolts are connected to the second adjustment hole 121 and the first adjustment hole 51.

[0080] When the tension of the printing platform 3 needs to be adjusted, the bolts can be loosened so that the adjusting member 5 can move its position relative to the bracket 1 through the first adjusting hole 51. When the distance between the first roller 21 and the second roller 22 is appropriate, that is, when the tension of the printing platform 3 is appropriate, the bolts are tightened to fix the position of the adjusting member 5, thereby fixing the position of the rotating shaft 211, and then fixing the position of the first roller 21 or the second roller 22. The structure is simple, and the operation is convenient and reliable. It can be understood that the number of adjusting members 5 can be at least two, and the two ends of the bearing are connected to the bracket 1 through the corresponding adjusting members 5 respectively.

[0081] Specifically, the adjusting member 5 can be a bearing eccentric block, and the eccentric block can be provided with a mounting hole eccentrically arranged with the first roller 21 or the second roller 22. The bearing is installed in the mounting hole, which is beneficial to increase the distance between the first roller 21 and the second roller 22, making it easier for the printing platform 3 to ensure better tension.

[0082] In some embodiments, see Figure 4 The bracket 1 may further include a docking block 14, a top plate 13 and two oppositely arranged side plates 12, the top plate 13 is connected between the two side plates 12, the docking block 14 is connected to the top of the top plate 13, and the docking block 14 is used to connect with the lifting mechanism of the 3D printer; the mounting plate 11 is connected between the two side plates 12. The first roller 21 and the second roller 22 can be rotatably connected between the two side plates 12. The aforementioned second adjustment hole 121 can be opened on the side plate 12.

[0083] To improve aesthetics, see Figure 4The printing platform assembly may further include cover plates 6 whose number matches that of the adjusting members 5 . The cover plates 6 cover the outer sides of the corresponding adjusting members 5 and are connected to the side plates 12 .

[0084] An embodiment of the utility model further provides a three-dimensional printer, comprising the aforementioned printing platform assembly.

[0085] The three-dimensional printer provided in the embodiment of the utility model includes a printing platform component, and therefore, the three-dimensional printer has all the beneficial effects of the printing platform component, which will not be described in detail here.

[0086] Label 1. A printing platform assembly, applied to a three-dimensional printer, comprising:

[0087] Bracket 1, bracket 1 is used to connect with the lifting mechanism of the 3D printer, and bracket 1 includes a printing area and a non-printing area;

[0088] A force applying member 2, wherein the force applying member 2 is arranged on the bracket 1;

[0089] The printing platform 3 is connected to the force applying member 2, the printing platform 3 is a flexible member, part of the printing platform 3 is located in the printing area, and part of the printing platform 3 is located in the non-printing area;

[0090] The force applying member 2 is used to apply force to the printing platform 3 to change the position of the printing platform 3, wherein at least part of the printing area of ​​the printing platform 3 moves to the non-printing area, and at least part of the printing area of ​​the printing platform 3 moves to the printing area.

[0091] Reference numeral 2. A printing platform assembly based on reference numeral 1, wherein the printing platform 3 in the printing area and at least a portion of the printing platform 3 in the non-printing area are not in the same plane;

[0092] The printing platform 3 is annular, and has a bending position 32 located in a non-printing area, and a portion of the printing platform 3 located at the bending position 32 is in a bent state;

[0093] The outer surface of the printing platform 3 includes a printing surface 31 located in the printing area;

[0094] The force applying member 2 is used to apply force to the printing platform 3 to drive the printing platform 3 to move along its extension track.

[0095] So that at least a portion of the printing surface 31 moves to the bending position 32.

[0096] Label 3. A printing platform assembly based on label 2,

[0097] The force applying member 2 includes a first roller 21 and a second roller 22, and the first roller 21 and the second roller 22 are both rotatably disposed on the bracket 1;

[0098] The printing platform 3 is sleeved on the outer circumference of the first roller 21 and the second roller 22;

[0099] The position on the printing platform 3 that is in contact with the first roller 21 or the second roller 22 is a bending position 32; the printing surface 31 is located between the first roller 21 and the second roller 22;

[0100] The first roller 21 and / or the second roller 22 are used to rotate to apply friction force to the printing platform 3 to drive the printing platform 3 to move along its extension track.

[0101] Label 4. A printing platform assembly based on label 2,

[0102] The printing platform 3 includes a first mounting surface 33 which is opposite to the printing surface 31;

[0103] The bracket 1 includes a mounting plate 11, the mounting plate 11 is located inside the printing platform 3, the mounting plate 11 includes a second mounting surface facing the first mounting surface 33, and the second mounting surface is a plane;

[0104] The first mounting surface 33 is in contact with the second mounting surface.

[0105] Label 5. A printing platform assembly based on label 4,

[0106] The mounting plate 11 is provided with a first magnetic member 4, the printing platform 3 is a second magnetic member, and the first magnetic member 4 is magnetically connected to the second magnetic member so that the first mounting surface 33 is fitted with the second mounting surface;

[0107] or,

[0108] The mounting plate 11 is a third magnetic member; a fourth magnetic member is disposed on the printing platform 3, and the third magnetic member is magnetically connected to the fourth magnetic member so that the first mounting surface 33 is fitted with the second mounting surface;

[0109] or,

[0110] The mounting plate 11 is a fifth magnetic member, the printing platform 3 is a sixth magnetic member, and the fifth magnetic member is magnetically connected to the sixth magnetic member so that the first mounting surface 33 is fitted with the second mounting surface;

[0111] or,

[0112] A seventh magnetic component is disposed on the mounting plate 11 ; an eighth magnetic component is disposed on the printing platform 3 , and the seventh magnetic component is magnetically connected to the eighth magnetic component so that the first mounting surface 33 is fitted with the second mounting surface.

[0113] Label 6. A printing platform assembly based on label 5,

[0114] If the first magnetic member 4 is provided on the mounting plate 11 and the printing platform 3 is the second magnetic member, a plurality of mounting through holes 111 are provided on the second mounting surface of the mounting plate 11;

[0115] There are multiple first magnetic components 4 , and the first magnetic components 4 are disposed in corresponding mounting through holes 111 .

[0116] Reference number 7. According to the printing platform assembly based on reference number 6, the mounting through hole 111 passes through the mounting plate 11;

[0117] A plurality of mounting through holes 111 are arranged in an array on the mounting plate 11;

[0118] The end surface of the first magnetic member 4 is flush with the second mounting surface.

[0119] Reference numeral 8. The printing platform assembly according to reference numeral 3, further comprising:

[0120] The tensioning member is arranged on the bracket 1 and is used to adjust the tension of the printing platform 3 .

[0121] Label 9. A printing platform assembly based on label 8,

[0122] The first roller 21 and / or the second roller 22 are rotatably connected to the bracket 1 via a rotating shaft 211;

[0123] The tensioning member includes an adjusting member 5 , through which the rotating shaft 211 is connected to the bracket 1 , and the adjusting member 5 is used to adjust the position of the rotating shaft 211 on the bracket 1 .

[0124] Label 10. A printing platform assembly based on label 9,

[0125] The adjusting member 5 is provided with a first adjusting hole 51, which is a long strip hole and extends along the arrangement direction of the first roller 21 and the second roller 22;

[0126] The bracket 1 is provided with a second adjustment hole 121 , and fasteners are connected inside the second adjustment hole 121 and the first adjustment hole 51 .

[0127] Label 11. A three-dimensional printer, comprising a printing platform assembly based on any one of labels 1 to 10.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A printing platform assembly, applied to a 3D printer, characterized in that: include: A bracket, the bracket is used to be connected to the lifting mechanism of the 3D printer, and the bracket includes a printing area and a non-printing area; A force applying member, wherein the force applying member is arranged on the bracket; A printing platform, the printing platform is connected to the force-applying member, the printing platform is a flexible member, part of the printing platform is located in the printing area, and part of the printing platform is located in the non-printing area; The force applying member is used to apply force to the printing platform to change the position of the printing platform, wherein at least part of the printing platform in the printing area moves to the non-printing area, and at least part of the printing platform in the non-printing area moves to the printing area.

2. The printing platform assembly according to claim 1, characterized in that: The printing platform of the printing area and the printing platform of at least part of the non-printing area are not in the same plane; The printing platform is annular, and has a bending position located in the non-printing area, and a portion of the printing platform located in the bending position is in a bent state; The outer surface of the printing platform includes a printing surface located in the printing area; The force applying member is used to apply force to the printing platform to drive the printing platform to move along its extension trajectory, so that at least a portion of the printing surface moves to the bending position.

3. The printing platform assembly according to claim 2, characterized in that: The force applying member comprises a first roller and a second roller, and the first roller and the second roller are both rotatably disposed on the bracket; The printing platform is sleeved on the outer circumference of the first roller and the second roller; The position on the printing platform that is in contact with the first roller or the second roller is a bent position; the printing surface is located between the first roller and the second roller; The first roller and / or the second roller are used to rotate to apply friction force to the printing platform to drive the printing platform to move along its extension track.

4. The printing platform assembly according to claim 2, characterized in that: The printing platform comprises a first mounting surface which is opposite to the printing surface; The bracket includes a mounting plate, the mounting plate is located inside the printing platform, the mounting plate includes a second mounting surface facing the first mounting surface, and the second mounting surface is a plane; The first mounting surface is in contact with the second mounting surface.

5. The printing platform assembly according to claim 4, characterized in that: The mounting plate is provided with a first magnetic member, the printing platform is a second magnetic member, and the first magnetic member is magnetically connected to the second magnetic member so that the first mounting surface is fitted to the second mounting surface; or, The mounting plate is a third magnetic member; a fourth magnetic member is disposed on the printing platform, and the third magnetic member is magnetically connected to the fourth magnetic member so that the first mounting surface is fitted to the second mounting surface; or, The mounting plate is a fifth magnetic member, the printing platform is a sixth magnetic member, and the fifth magnetic member is magnetically connected to the sixth magnetic member so that the first mounting surface is in contact with the second mounting surface; or, A seventh magnetic component is disposed on the mounting plate; an eighth magnetic component is disposed on the printing platform, and the seventh magnetic component is magnetically connected to the eighth magnetic component so that the first mounting surface is fitted with the second mounting surface.

6. The printing platform assembly according to claim 5, characterized in that: If the mounting plate is provided with a first magnetic member and the printing platform is a second magnetic member, a plurality of mounting through holes are provided on the second mounting surface of the mounting plate; There are multiple first magnetic components, and the first magnetic components are arranged in corresponding mounting through holes.

7. The printing platform assembly according to claim 6, characterized in that: The mounting through hole passes through the mounting plate; A plurality of the mounting through holes are arranged in an array on the mounting plate; An end surface of the first magnetic member is flush with the second mounting surface.

8. The printing platform assembly according to claim 3, characterized in that: Also includes: A tensioning member is arranged on the bracket and is used to adjust the tension of the printing platform.

9. The printing platform assembly according to claim 8, characterized in that: The first roller and / or the second roller is rotatably connected to the bracket via a rotating shaft; The tensioning member includes an adjusting member, the rotating shaft is connected to the bracket via the adjusting member, and the adjusting member is used to adjust the position of the rotating shaft on the bracket.

10. The printing platform assembly according to claim 9, characterized in that: The adjusting member is provided with a first adjusting hole, which is an elongated hole and extends along the arrangement direction of the first roller and the second roller; The bracket is provided with a second adjustment hole, and fasteners are connected in the second adjustment hole and the first adjustment hole.

11. A three-dimensional printer, characterized in that: The invention comprises a printing platform assembly as claimed in any one of claims 1 to 10.

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