Dustproof assembly and 3D printer

Abstract

A dustproof assembly (100), which is applied to a 3D printer (200), the 3D printer (200) comprising a heated print bed (210) and a heated print bed lifting assembly, wherein the heated print bed lifting assembly is configured to adjust the position of the heated print bed (210) in the direction of height of the 3D printer (200). The dustproof assembly (100) comprises a fixing member (110), a protective member (130) and an elastic member (150), wherein the fixing member (110) is configured to be connected to the bottom end of the heated print bed lifting assembly, and the fixing member (110) comprises an accommodating groove (111), which comprises an accommodating opening (112); the protective member (130) is movably arranged in the accommodating groove (111), and the protective member (130) covers the accommodating opening (112); and the elastic member (150) is located in the accommodating groove (111), and two ends of the elastic member (150) abut against the protective member (130) and the accommodating groove (111), respectively. The dustproof assembly (100) can accommodate the heated print bed lifting assembly to increase the internal space of a whole machine; and the protective member (130) can prevent foreign matters from entering the accommodating groove (111), thereby achieving easy assembly and disassembly and preventing falling off during operation.

Description

Dustproof components and 3D printers

[0001] This application claims priority to Chinese Patent Application No. 202510066714.0, filed on January 15, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of 3D printing technology, and in particular to a dustproof component and a 3D printer. Background Technology

[0003] 3D printing technology, also known as additive manufacturing, is a technology that uses digital model files as a basis and employs adhesive materials to construct objects layer by layer. 3D printing is typically achieved using a 3D printer. A 3D printer, also called a three-dimensional printer or stereoprinter, is a type of rapid prototyping equipment.

[0004] 3D printers typically include an optical axis, the bottom of which inserts into the bottom of the printer chamber. However, during operation, material can fall into the bottom of the printer chamber, potentially contaminating the environment around the optical axis. Summary of the Invention

[0005] The summary of this application introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] According to one aspect of this application, a dustproof assembly is provided for a 3D printer, the 3D printer including a heated bed and a heated bed lifting assembly, the heated bed lifting assembly being used to adjust the position of the heated bed along the height direction of the 3D printer, the dustproof assembly comprising:

[0007] A fixing member is provided for connection to the bottom end of the heated bed lifting assembly, the fixing member including a receiving groove including a receiving opening;

[0008] A protective member, movably disposed in the receiving groove, the protective member covering the receiving opening;

[0009] An elastic member is located in the receiving groove, and both ends of the elastic member abut against the protective member and the receiving groove, respectively.

[0010] According to this application, a dustproof component is used in a 3D printer. The 3D printer includes a heated bed and a heated bed lifting assembly. The heated bed lifting assembly is used to adjust the position of the heated bed along the height direction of the 3D printer. The dustproof component includes a fixing member, a protective member, and an elastic member. The fixing member is used to connect to the bottom end of the heated bed lifting assembly and includes a receiving groove with a receiving opening. The protective member is movably disposed in the receiving groove and covers the receiving opening. The elastic member is located in the receiving groove, and its two ends abut against the protective member and the receiving groove, respectively. Thus, the dustproof component can accommodate the heated bed lifting assembly, increasing the overall machine space. The protective member can prevent debris from entering the receiving groove. The protective member and the receiving groove are easy to install. The elastic member allows the protective member to return to its original position, making it easy to assemble and disassemble, and preventing it from easily falling off during movement.

[0011] Optionally, the receiving groove includes an engaging groove, and the protective member includes a protrusion, wherein the engaging groove and the protrusion can engage, or...

[0012] The receiving groove includes a limiting platform, and the protective member includes a protrusion. The limiting platform is used to restrict the protrusion from disengaging from the engaging groove.

[0013] Optionally, the receiving groove includes a limiting platform, and the protective member includes a protrusion, the limiting platform being used to restrict the protrusion from disengaging from the engaging groove.

[0014] Optionally, the receiving groove further includes a first wall, a second wall, and a third wall, wherein the first wall and the second wall are spaced apart along the circumferential direction of the receiving groove.

[0015] The first wall and the second wall are connected by the third wall to form an engaging groove.

[0016] Optionally, the receiving groove further includes a communicating groove that communicates with the engaging groove. The communicating groove extends along the depth direction of the receiving groove. The receiving groove also includes an inlet hole that communicates with the outside of the receiving groove along the depth direction. The protrusion enters the engaging groove through the inlet hole.

[0017] The receiving groove also includes a detachable cover, which cooperates with the receiving groove to form a limiting platform. The receiving groove also includes a connecting groove that extends along the depth direction of the receiving groove and can accommodate the protrusion.

[0018] Optionally, the protrusion moves between the unlocked position and the locked position.

[0019] The protrusion, located in the unlocked position, lies within the inlet hole to allow the protective member to separate from the receiving groove.

[0020] The protrusion, located in the locking position, is in the engagement groove to lock the protective member and the fixing member.

[0021] Optionally, the first wall includes a first inclined surface facing the engagement groove and extending downward at an incline.

[0022] Optionally, the receiving groove further includes a first wall and a second inclined surface, the second inclined surface being located at the bottom of the inlet hole, the second inclined surface facing the first wall and extending upward at an inclination, such that the protrusion in the communicating groove is spaced apart from the first wall along the circumferential direction of the receiving groove.

[0023] Optionally, the protective member is movable between a protective position and a compression position, wherein the protective member in the protective position is higher than or flush with the receiving opening, and the protective member in the compression position is lower than the receiving opening.

[0024] Optionally, the receiving groove includes a connecting engagement groove and a connecting groove, the protective member located in the protective position is located in the engaging groove, and the protective member located in the compressed position is located in the connecting groove.

[0025] Optionally, the elastic member includes a first end and a second end, the first end abutting against the protective member, the second end abutting against the receiving groove, the first end and the second end having different dimensions, and the first end or the second end of the elastic member in a compressed state being housed in the elastic member.

[0026] According to another aspect of this application, a 3D printer is provided, the 3D printer including a heated bed, a heated bed lifting assembly and the aforementioned dustproof assembly, the heated bed lifting assembly adjusting the position of the heated bed along the height direction of the 3D printer, the bottom end of the heated bed lifting assembly being connected to the dustproof assembly, the 3D printer further including a pulley, the pulley being connected to the fixing member, the heated bed lifting assembly including a lead screw and an optical axis, the lead screw being connected to the pulley, and the optical axis being connected to the receiving groove.

[0027] According to the 3D printer of this application, the 3D printer includes a heated bed, a heated bed lifting assembly, and the aforementioned dustproof assembly. The heated bed lifting assembly adjusts the position of the heated bed along the height direction of the 3D printer. The bottom end of the heated bed lifting assembly is connected to the dustproof assembly. The 3D printer also includes a pulley connected to a fixed member. The heated bed lifting assembly includes a lead screw and an optical shaft. The lead screw is connected to the pulley, and the optical shaft is connected to a receiving groove. The dustproof assembly includes a fixed member, a protective member, and an elastic member. The fixed member is used to connect to the bottom end of the heated bed lifting assembly and includes a receiving groove with a receiving opening. The protective member is movably disposed in the receiving groove, covering the receiving opening. The elastic member is located in the receiving groove, and its two ends abut against the protective member and the receiving groove, respectively. In this way, the dustproof assembly can accommodate the heated bed lifting assembly, increasing the overall machine space; the protective member can prevent debris from entering the receiving groove; the protective member and the receiving groove are easy to install; and the elastic member allows the protective member to return to its original position, making it easy to assemble, easy to disassemble, and unlikely to fall off during movement.

[0028] Optionally, the 3D printer further includes a pulley connected to the fixed member, and the heated bed lifting assembly includes a lead screw and an optical axis, the lead screw being connected to the pulley and the optical axis being connected to the receiving groove.

[0029] Optionally, the 3D printer includes at least two heated bed lifting assemblies, each including a first heated bed lifting assembly and a second heated bed lifting assembly. The first heated bed lifting assembly is spaced apart from the second heated bed lifting assembly along the depth direction of the 3D printer, and the first heated bed lifting assembly is connected to the dustproof assembly.

[0030] Optionally, the first heated bed lifting assembly includes a first linear bearing, and the second heated bed lifting assembly includes a second linear bearing.

[0031] There is a height difference between the lower end face of the first linear bearing and the lower end face of the second linear bearing, and / or,

[0032] The first linear bearing protrudes downward from the second linear bearing along the height direction of the 3D printer.

[0033] Optionally, a portion of the first linear bearing is located in the receiving groove, and the first linear bearing applies a force to the protective member to compress the elastic member.

[0034] Optionally, the 3D printer includes two sets of second heated bed lifting assemblies. The first heated bed lifting assembly further includes a first lead screw and a first optical axis. The axes of the optical axes of the two sets of second heated bed lifting assemblies are all located on a plane that is a first plane. The first lead screw and the first optical axis are arranged in a direction perpendicular to the first plane, wherein the first optical axis is set closer to the heated bed than the first lead screw.

[0035] Optionally, the 3D printer further includes a heated bed and a base plate, with the dustproof assembly detachably connected to the base plate. The edge of the receiving groove of the dustproof assembly is flush with the surface of the base plate facing the heated bed, or the edge of the receiving groove of the dustproof assembly is slightly higher than the surface of the base plate facing the heated bed. Attached Figure Description

[0036] The following figures are included as part of this application for understanding the application. The figures illustrate embodiments of the application and their descriptions, explaining the apparatus and principles of the application. In the figures,

[0037] Figure 1 is a perspective view of a dustproof assembly according to a preferred embodiment of the present application;

[0038] Figure 2 is a three-dimensional schematic diagram of the fixing component shown in Figure 1;

[0039] Figure 3 is a partial schematic diagram of part A in Figure 2;

[0040] Figure 4 is a perspective view of the protective component of a dustproof assembly according to a preferred embodiment of this application;

[0041] Figure 5 is a three-dimensional schematic diagram of the dustproof assembly shown in Figure 1, wherein the protective component is located in the protective position;

[0042] Figure 6 is a magnified view of part B in Figure 5;

[0043] Figure 7 is a three-dimensional schematic diagram of the dustproof assembly shown in Figure 1, wherein the protective component is located in the compression position;

[0044] Figure 8 is a magnified view of part C in Figure 7;

[0045] Figure 9 is a perspective view of the optical axis and lead screw of a 3D printer according to a preferred embodiment of this application;

[0046] Figure 10 is a magnified view of part D in Figure 9;

[0047] Figure 11 is a partial perspective view of a 3D printer according to a preferred embodiment of the present application;

[0048] Figure 12 is a top view of the 3D printer shown in Figure 11;

[0049] Figure 13 is another partial stereoscopic view of the 3D printer shown in Figure 11;

[0050] Figure 14 is another partial perspective view of a 3D printer according to a preferred embodiment of the present application;

[0051] Figure 15 is a partial stereoscopic view of the 3D printer shown in Figure 14;

[0052] Figure 16 is another partial stereoscopic view of the 3D printer shown in Figure 14.

[0053] Explanation of reference numerals in the attached drawings: 100: Dustproof component; 110: Fixing component; 111: Receiving groove; 112: Receiving opening; 113: Engaging groove; 114: First wall; 115: Second wall; 116: Connecting groove; 117: Entry hole; 118: First inclined surface; 119: Second inclined surface; 120: Third wall; 121: First hole; 122: Second hole; 130: Protective component; 131: Protective hole; 132: Protrusion; 133: Body; 150: Elastic component; 151: First end of elastic component; 152: Second end of elastic component; 200: 3D printer; 201: First optical axis; 202: Bottom end of first optical axis; 203: First lead screw; 204: Locking shaft; 205: Second optical axis; 206: Second lead screw; 207: Third optical axis; 208: Third lead screw; 210: Heated bed; 211: Base plate; 212: First bearing; 213: Third bearing. Detailed Implementation

[0054] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0055] To fully understand this application, detailed portions will be set forth in the following description in order to illustrate it. Obviously, implementation of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, other embodiments may exist besides these detailed descriptions, and should not be construed as being limited to the embodiments set forth herein.

[0056] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of this application. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. The terms “upper,” “lower,” “front,” “rear,” “left,” “right,” and similar expressions used in this application are for illustrative purposes only and are not intended to be limiting.

[0057] The ordinal numbers such as "first" and "second" used in this application are merely identifiers and have no other meaning, such as a specific order. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] The specific embodiments of this application will be described in more detail below with reference to the accompanying drawings, which illustrate representative embodiments of this application and are not intended to limit this application.

[0059] This application provides a dustproof component 100 for use in a 3D printer 200. The 3D printer 200 utilizes FDM (Fused Deposition Modeling) technology for printing. The 3D printer 200 includes a tool head and a heated bed 210, and the tool head is movable. When the tool head moves to a preset position, it heats and melts a filament of thermoplastic material, which is then extruded through the nozzle of the tool head and stacked layer by layer from bottom to top on the heated bed 210 to build an object. In this embodiment, "bottom" refers to the direction towards the bottom of the 3D printer 200, and "top" refers to the direction towards the top of the 3D printer 200. The tool head includes an extrusion assembly and a hot end. The extrusion assembly conveys the printing material supplied to the 3D printer 200 by the feeding device to the hot end. The hot end has a heating function, heating the printing material to a molten state and extruding the molten printing material onto the heated bed 210.

[0060] For example, the hot end includes heat dissipation fins, a nozzle, and a throat located between the heat dissipation fins and the nozzle. The printing material passes sequentially through the heat dissipation fins, the throat, and the nozzle. Specifically, the printing material is heated to a molten state at the nozzle, and the nozzle extrudes the molten printing material onto the heated bed 210.

[0061] The 3D printer 200 also includes a heated bed lifting assembly, which adjusts the position of the heated bed 210 along the height direction of the 3D printer 200. The bottom end of the heated bed lifting assembly is connected to the dustproof assembly 100. The bottom end of the heated bed lifting assembly is located at the bottom of the heated bed lifting assembly along its height direction. The height direction of the heated bed lifting assembly is parallel to the height direction of the 3D printer 200. The heated bed lifting assembly is connected to the heated bed 210. The tool head can move along the height direction of the heated bed lifting assembly to achieve material stacking. During the movement along the printing path, the nozzle extrudes molten printing material layer by layer at different positions on the heated bed 210, thereby printing a three-dimensional object.

[0062] As shown in Figures 9 and 10, the heated bed lifting assembly includes a lead screw and an optical axis, which are arranged in parallel. The 3D printer 200 also includes a pulley connected to the lead screw. Rotation of the pulley drives the lead screw to rotate. A retaining pin 204 is provided at the bottom end of the lead screw. The retaining pin 204 can be connected to the axis of the pulley. The cross-sectional shape of the retaining pin 204 can be constructed as a "D". Rotation of the pulley drives the retaining pin 204 to rotate, thereby driving the lead screw to rotate. The pulley can be connected to the dustproof assembly 100 to prevent the pulley from falling off. The tool head is movably connected to the lead screw, and the optical axis guides the movement of the tool head. The optical axis is connected to the dustproof assembly 100. The bottom end of the optical axis is connected to the dustproof assembly 100.

[0063] The 3D printer 200 also includes a chamber in which a tool head and a heated bed 210 are disposed. The 3D printer 200 further includes a heated bed connector connected to the heated bed 210. The heated bed connector connects the heated bed lifting assembly and the heated bed 210, allowing the heated bed 210 to move along the height direction of the heated bed lifting assembly. One end of the heated bed connector is connected to the heated bed lifting assembly. Preferably, the heated bed connector is located below the heated bed 210. The heated bed connector is located below the heated bed 210 along the height direction of the 3D printer 200. The other end of the heated bed connector is connected to the heated bed 210. In this embodiment, "bottom surface of the heated bed 210" refers to the surface of the heated bed 210 facing the bottom of the 3D printer 200.

[0064] The lead screw is equipped with a lead screw nut, which is connected to the heated bed connector. The lead screw nut can move along the height direction of the lead screw, thereby driving the heated bed connector to move along the height direction of the lead screw. The method by which the rotation of the lead screw drives the lead screw nut to move linearly along the height direction of the lead screw is similar to the existing method, and will not be described again in this application. The optical shaft is equipped with a linear bearing, which is connected to the heated bed connector. The linear bearing guides the heated bed connector as it moves along the height direction of the lead screw.

[0065] The 3D printer 200 includes at least two heated bed lifting assemblies, comprising a first heated bed lifting assembly and a second heated bed lifting assembly. The first heated bed lifting assembly is spaced apart from the second heated bed lifting assembly along the depth direction of the 3D printer 200. The depth direction of the 3D printer 200 is parallel to the Y-axis direction. The first heated bed lifting assembly is spaced apart from the second heated bed lifting assembly along the Y-axis direction of the 3D printer 200.

[0066] The 3D printer 200 includes a door panel and a back panel, which are arranged opposite to each other. The door panel and back panel are spaced apart along the depth direction of the 3D printer 200. The depth direction of the 3D printer 200 is perpendicular to the height direction of the 3D printer 200. The door panel can be opened to facilitate the removal of objects from the chamber. A first heated bed lifting assembly is closer to the back panel than a second heated bed lifting assembly. The second heated bed lifting assembly is closer to the front panel than the first heated bed lifting assembly.

[0067] The first heated bed lifting assembly is connected to the dustproof assembly 100. The first heated bed lifting assembly includes a first linear bearing, a first optical axis 201, and a first lead screw 203. The first linear bearing is sleeved onto the first optical axis 201. The first linear bearing can be connected to the heated bed 210. The first heated bed lifting assembly also includes a first heated bed connector, which is connected to the heated bed 210. The first linear bearing is connected to the heated bed 210 via the first heated bed connector. The first linear bearing is movable relative to the first optical axis 201 along the height direction of the 3D printer 200. The first optical axis 201 is positioned closer to the heated bed 210 relative to the first lead screw 203. The first optical axis 201 is positioned closer to the heated bed 210 relative to the first lead screw 203 along the depth direction of the 3D printer 200.

[0068] The second heated bed lifting assembly includes a second linear bearing and a second optical axis 205, with the second linear bearing sleeved onto the second optical axis 205. The second linear bearing is connectable to the heated bed 210. The second heated bed lifting assembly also includes a second heated bed connector, which is connected to the heated bed 210. The second linear bearing is connected to the heated bed 210 via the second heated bed connector. The second linear bearing is movable relative to the second optical axis 205 along the height direction of the 3D printer 200.

[0069] To avoid collision between the first linear bearing and the tool head, the first linear bearing does not protrude from the upper surface of the heated bed 210. The first linear bearing does not protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200. The second linear bearing may protrude from the upper surface of the heated bed 210. The second linear bearing may protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200. Therefore, the lower end face of the first linear bearing is not flush with the lower end face of the second linear bearing. In this embodiment, "lower end face of the first linear bearing" refers to the surface of the first linear bearing facing the bottom of the 3D printer 200. "Lower end face of the first linear bearing" refers to the surface of the second linear bearing facing the bottom of the 3D printer 200. The first linear bearing protrudes downwards from the second linear bearing along the height direction of the 3D printer 200. The first linear bearing protrudes from the second linear bearing in the direction towards the bottom of the 3D printer 200 along the height direction of the 3D printer 200. There is a height difference between the lower end face of the first linear bearing and the lower end face of the second linear bearing. The lower end face of the second linear bearing is higher than the lower end face of the first linear bearing.

[0070] Optionally, near the area where the first heated bed lifting assembly is located, the 3D printer may also be equipped with at least one of the following: a nozzle wiping mechanism, a trash can, an air duct module, or a cutting device. It is understood that the tool head will move near the first heated bed lifting assembly when performing specific actions such as nozzle wiping, flushing, or cutting filament. Therefore, setting the first linear bearing to not protrude from the upper surface of the heated bed 210 can prevent the first heated bed lifting assembly from occupying the tool head's activity space, thereby avoiding collisions and improving the space utilization of the 3D printer. Meanwhile, in order to improve the reusability of parts, the first heated bed lifting assembly and the second heated bed lifting assembly can use linear bearings of the same specifications. In one embodiment, the area where the second heated bed lifting assembly is located is beyond the range of motion of the tool head, so the tool head will not interfere with the second linear bearing. Therefore, the second linear bearing can be set to protrude from the upper surface of the heated bed 210 so as to form spatial reuse with the tool head in the height direction, which can improve the utilization rate of the 3D printer in the height direction. In this setting, there is a height difference between the lower end face of the first linear bearing and the lower end face of the second linear bearing, and the lower end face of the second linear bearing is higher than the lower end face of the first linear bearing.

[0071] When the heated bed 210 moves to its lowest limit position on the 3D printer 200, a portion of the first linear bearing is housed in the dustproof assembly 100 to avoid interference. The dustproof assembly 100 can accommodate a portion of the first linear bearing. This expands the overall workspace of the machine, particularly in the vertical direction.

[0072] Optionally, the first heated bed lifting assembly further includes a first lead screw nut, which is sleeved onto the first lead screw 203. The first lead screw nut can be connected to the heated bed 210. The first heated bed lifting assembly also includes a first heated bed connector, which is connected to the heated bed 210. The first lead screw nut is connected to the heated bed 210 via the first heated bed connector. The first lead screw nut can move relative to the first lead screw 203 along the height direction of the 3D printer 200.

[0073] The second heated bed lifting assembly includes a second lead screw nut and a second lead rod 206, with the second lead screw nut sleeved onto the second lead rod 206. The second lead screw nut can be connected to the heated bed 210. The second heated bed lifting assembly also includes a second heated bed connector, which is connected to the heated bed 210. The second lead screw nut is connected to the heated bed 210 via the second heated bed connector. The second lead screw nut can move relative to the second lead rod 206 along the height direction of the 3D printer 200.

[0074] To avoid collision between the first lead screw nut and the tool head, the first lead screw nut does not protrude from the upper surface of the heated bed 210. The first lead screw nut does not protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200. The second lead screw nut may protrude from the upper surface of the heated bed 210. The second lead screw nut may protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200. Therefore, the lower end face of the first lead screw nut is not flush with the lower end face of the second lead screw nut. In this embodiment, "lower end face of the first lead screw nut" refers to the surface of the first lead screw nut facing the bottom of the 3D printer 200. "Lower end face of the first lead screw nut" refers to the surface of the second lead screw nut facing the bottom of the 3D printer 200. The first lead screw nut protrudes downwards from the second lead screw nut along the height direction of the 3D printer 200. The first lead screw nut protrudes towards the bottom of the 3D printer 200 along the height direction of the 3D printer 200. There is a height difference between the lower end face of the first leadscrew nut and the lower end face of the second leadscrew nut. The lower end face of the second leadscrew nut is higher than the lower end face of the first leadscrew nut.

[0075] As shown in Figures 11 to 13, the 3D printer 200 includes three heated bed lifting assemblies, which can be arranged in a triangular configuration to support the heated bed. The 3D printer 200 includes a first heated bed lifting assembly and two sets of second heated bed lifting assemblies (for ease of distinction, the two sets of second heated bed lifting assemblies are referred to as the second heated bed lifting assembly and the third heated bed lifting assembly, respectively), arranged in a triangular configuration. The first heated bed lifting assembly is closer to the back plate of the 3D printer 200 than the second heated bed lifting assembly. The second heated bed lifting assembly is closer to the front panel of the 3D printer 200 than the first heated bed lifting assembly. The first heated bed lifting assembly is closer to the back plate of the 3D printer 200 than the third heated bed lifting assembly. The third heated bed lifting assembly is closer to the front panel of the 3D printer 200 than the first heated bed lifting assembly.

[0076] The first heated bed lifting assembly is located to the side of the heated bed 210 along the depth direction of the 3D printer 200. The first heated bed lifting assembly includes a first optical axis 201, a first lead screw 203, a first linear bearing, a first lead screw nut, and a first heated bed connector. The first optical axis 201 and the first lead screw 203 are parallel. The first optical axis 201 and the first lead screw 203 are arranged at intervals along the depth direction of the 3D printer 200. The first optical axis 201 and the first lead screw 203 are parallel along the depth direction of the 3D printer 200. The projections of the first optical axis 201 and the first lead screw 203 along the depth direction of the 3D printer 200 coincide.

[0077] The second heated bed lifting assembly is located to the side of the heated bed 210 along the width direction of the 3D printer 200. The second heated bed lifting assembly includes a second optical axis 205, a second lead screw 206, a second linear bearing, a second lead screw nut, and a second heated bed connector. The second optical axis 205 and the second lead screw 206 are spaced apart along the depth direction of the 3D printer 200. The second optical axis 205 and the second lead screw 206 are also spaced apart along the width direction of the 3D printer 200. The line connecting the second optical axis 205 and the second lead screw 206 forms an inclined angle with the depth direction of the 3D printer 200. The projections of the second optical axis 205 and the second lead screw 206 along the depth direction of the 3D printer 200 are completely offset. The projections of the second optical axis 205 and the second lead screw 206 along the width direction of the 3D printer 200 are also completely offset.

[0078] The third heated bed lifting assembly is located to the side of the heated bed 210 along the width direction of the 3D printer 200. The third heated bed lifting assembly includes a third optical axis 207, a third lead screw 208, a third linear bearing, a third lead screw nut, and a third heated bed connector. The third optical axis 207 and the third lead screw 208 are arranged at intervals along the depth direction of the 3D printer 200. The third optical axis 207 and the third lead screw 208 are arranged at intervals along the width direction of the 3D printer 200. The line connecting the third optical axis 207 and the third lead screw 208 forms an inclined angle with the depth direction of the 3D printer 200. The projections of the third optical axis 207 and the third lead screw 208 along the depth direction of the 3D printer 200 are completely offset. The projections of the third optical axis 207 and the third lead screw 208 along the width direction of the 3D printer 200 are completely offset.

[0079] The bottom of the first lead screw is connected to the base plate 211. The top of the first lead screw is movable. The bottom of the first optical axis 201 is connected to the base plate 211. The top of the first optical axis 201 is movable. Both the first lead screw 203 and the first optical axis 201 bear the bending moment applied by the heated bed 210. The axes of the second and third optical axes lie in a plane that is the first plane. The first lead screw and the first optical axis are arranged in a direction perpendicular to the first plane. The first optical axis 201 is closer to the heated bed 210 than the first lead screw 203 along the depth direction of the 3D printer 200. The first lead screw nut is farther away from the heated bed 210 than the first linear bearing. It is understood that the load-bearing capacity of the first linear bearing is higher than that of the first lead screw nut, and bending of the first lead screw nut will have a greater impact on the 3D printing quality. In one embodiment, the contact length between the first lead screw nut and the first lead screw 203 is less than the contact length between the first linear bearing and the first optical axis 201. Thus, the first optical axis 201 and the first linear bearing have a longer contact length to reduce the bending moment borne by the first lead screw nut. The second lead screw 206 is closer to the heated bed 210 along the width direction of the 3D printer 200 than the second optical axis 205. The third lead screw 208 is closer to the heated bed 210 along the width direction of the 3D printer 200 than the third optical axis 207.

[0080] The first linear bearing is closer to the tool head than the first leadscrew nut. The first linear bearing is more likely to collide with the tool head than the first leadscrew nut. To avoid collision between the first linear bearing and the tool head, the first linear bearing does not protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200. The first linear bearing protrudes from the lower surface of the heated bed 210 along the height direction of the 3D printer 200. The second linear bearing is farther from the tool head than the second leadscrew nut. The first linear bearing is more likely to collide with the tool head than the second linear bearing. The second linear bearing may protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200. The third linear bearing is farther from the tool head than the third leadscrew nut. The first linear bearing is more likely to collide with the tool head than the third linear bearing. The third linear bearing may protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200.

[0081] The length of the first linear bearing protruding from the lower surface of the heated bed 210 is greater than the length of the second or third linear bearing protruding from the lower surface of the heated bed 210. When the heated bed 210 moves to the lower limit position, the lower end face of the second or third linear bearing is flush with the plane of the base plate 211 or has a small gap. Thus, to avoid interference between the first linear bearing and the base plate 211 or the dustproof assembly 100 when the heated bed 210 is in the lower limit position, the dustproof assembly can at least partially accommodate the first linear bearing. In particular, the dustproof assembly can accommodate the first linear bearing when the heated bed 210 is in the lower limit position. The dustproof assembly 100 is located below the base plate 211. The dustproof assembly 100 is located below the base plate 211 along the 3D printer. Specifically, as shown in Figures 1 and 2, the dustproof assembly 100 includes a fixing member 110 located at the bottom of the 3D printer 200. The fixing member 110 can be connected to the bottom of the chamber via a connector. The fixing member 110 is used to connect the heated bed lifting assembly. The bottom end of the heated bed lifting assembly is connected to the fixing member 110. In particular, the fixing member 110 is capable of fixing the first heated bed lifting assembly. In particular, the fixing member 110 is capable of accommodating the bottom of the first optical axis.

[0082] The first heated bed lifting assembly is connected to the fixed member 110. The bottom end of the first lifting assembly is connected to the fixed member 110. Referring to Figure 3, the fixed member 110 includes a receiving groove 111 for connecting to the first heated bed lifting assembly. The receiving groove 111 includes a receiving opening 112, the opening direction of which faces upward towards the receiving groove 111. The opening direction of the receiving opening 112 faces the direction of the first linear bearing. The opening direction of the receiving opening 112 faces the direction of the first linear bearing along the height direction of the 3D printer 200. The opening direction of the receiving opening 112 faces upward along the height direction of the 3D printer 200. The first heated bed lifting assembly can enter the receiving groove 111 through the receiving opening 112.

[0083] As shown in Figure 1, the dustproof assembly 100 also includes a protective member 130, which is movably disposed in the receiving groove 111. The protective member 130 also covers the receiving opening 112. The shape of the protective member 130 matches the shape of the receiving opening 112. The protective member 130 is movable relative to the receiving groove 111. The protective member 130 can move linearly relative to the receiving groove 111. The protective member 130 is movable along the depth direction of the receiving groove 111. The depth direction of the receiving groove 111 is parallel to the height direction of the 3D printer 200. The protective member 130 is movable linearly along the height direction of the 3D printer 200. The protective member 130 can also rotate relative to the receiving groove 111. The protective member 130 can also rotate about the axial direction of the receiving groove 111.

[0084] The bottom end of the first heated bed lifting assembly can pass through the protective member 130 and enter the receiving groove 111. Specifically, the first optical axis 201 is connected to the receiving groove 111. The bottom end 202 of the first optical axis 201 passes through the protective member 130 and enters the receiving groove 111. The protective member 130 includes a protective hole 131 that penetrates the protective member 130. The axial direction of the protective hole 131 is parallel to the depth direction of the receiving groove 111. The protective hole 131 is located at the middle of the protective member 130. This ensures coaxiality. The bottom end of the first heated bed lifting assembly enters the receiving groove 111 through the protective hole 131. The bottom end 202 of the first optical axis 201 enters the receiving groove 111 through the protective hole 131. The first optical axis 201 passes through the protective hole 131 and enters the receiving groove 111. In this way, the protective component 130 can block debris in the chamber of the 3D printer 200 and prevent debris from entering the receiving slot 111.

[0085] To prevent the protective member 130 from occupying internal space of the 3D printer 200, the dustproof assembly 100 also includes an elastic member 150, which is located in the receiving groove 111. Both ends of the elastic member 150 abut against the protective member 130 and the receiving groove 111, respectively. The elastic member 150 is capable of elastic deformation along the depth direction of the receiving groove 111. The elastic member 150 can provide a restoring force to the protective member 130. One end of the elastic member 150 along the depth direction of the receiving groove 111 abuts against the protective member 130. One end of the elastic member 150 along the depth direction of the receiving groove 111 abuts against the bottom surface of the protective member 130. In this embodiment, the "bottom surface of the protective member 130" refers to the surface of the protective member 130 facing the bottom of the receiving groove 111. The elastic member 150 can support the protective member 130.

[0086] The other end of the elastic member 150 along the depth direction of the receiving groove 111 abuts against the receiving groove 111. The receiving groove 111 includes a bottom, which faces the receiving opening 112 along the depth direction of the receiving groove 111. As an alternative embodiment, the other end of the elastic member 150 along the depth direction of the receiving groove 111 may abut against the bottom of the groove. For example, the other end of the elastic member 150 may contact the bottom of the groove. The bottom of the groove can support the elastic member 150. The receiving groove 111 also includes a groove wall, which is disposed around the receiving groove 111. The groove wall is connected to the bottom of the groove. As another alternative embodiment, the other end of the elastic member 150 along the depth direction of the receiving groove 111 may also abut against the groove wall. For example, the other end of the elastic member 150 may be fixed to the groove wall. The groove wall can apply a supporting force to the elastic member 150.

[0087] The first linear bearing moves along the height direction of the first heated bed lifting assembly. When the first linear bearing moves to the bottom of the chamber, it comes into contact with the protective member 130. To avoid interference between the fixing member 110 and the first linear bearing, a portion of the first linear bearing is located in the receiving groove 111. A portion of the first linear bearing can enter the receiving groove 111 through the receiving opening 112. For example, the first linear bearing along the bottom of the 3D printer 200 can be located in the receiving groove 111. The first linear bearing applies a downward force to the protective member 130, causing the protective member 130 to move downward. The first linear bearing applies a force to the protective member 130 in a direction away from the heated bed 210, causing the protective member 130 to move in a direction away from the heated bed 210. The protective member 130 can move within the receiving groove 111. Thus, the protective member 130 does not interfere with the first linear bearing. The first linear bearing protrudes downwards from the second linear bearing along the height direction of the 3D printer 200. The dustproof assembly 100 can absorb the height of the protrusion of the first linear bearing along the height direction of the 3D printer 200. This increases the overall space of the machine, resulting in high space utilization.

[0088] According to this application, a dustproof component 100 is used in a 3D printer 200. The 3D printer 200 includes a heated bed 210 and a heated bed lifting assembly. The heated bed lifting assembly is used to adjust the position of the heated bed 210 along the height direction of the 3D printer 200. The dustproof component 100 includes a fixing member 110, a protective member 130, and an elastic member 150. The fixing member 110 is used to connect to the bottom end of the heated bed lifting assembly. The fixing member 110 includes a receiving groove 111, and the receiving groove 111 includes a receiving opening 112. The protective member 130 is movably disposed in the receiving groove 111 and covers the receiving opening 112. The elastic member 150 is located in the receiving groove 111, and both ends of the elastic member 150 abut against the protective member 130 and the receiving groove 111, respectively. In this way, the dustproof component 100 can accommodate the heated bed lifting component, increasing the overall space of the machine. The protective component 130 can prevent debris from entering the receiving slot 111. The protective component 130 and the receiving slot 111 are easy to install. The elastic component 150 can make the protective component 130 return to its original position, making it easy to assemble, easy to disassemble, and not easy to fall off during movement.

[0089] To prevent the protective member 130 from detaching from the receiving groove 111, the protective member 130 can also engage with the receiving groove 111. As shown in Figure 3, the receiving groove 111 includes an engaging groove 113, which connects the interior and exterior of the receiving groove 111. The engaging groove 113 connects the interior and exterior of the receiving groove 111 along the radial direction. The engaging groove 113 penetrates the groove wall. The engaging groove 113 penetrates the groove wall along the thickness direction. The opening direction of the engaging groove 113 is opposite to the opening direction of the receiving groove 111. The opening direction of the engaging groove 113 faces the bottom of the engaging groove 113. The opening direction of the engaging groove 113 opens downwards. The engaging groove 113 includes a groove bottom, which faces downwards along the depth direction of the receiving groove 111. The bottom of the engaging groove 113 faces the bottom of the receiving groove 111 along the depth direction of the receiving groove 111.

[0090] Furthermore, the receiving groove 111 also includes a first wall 114 and a second wall 115, which are spaced apart. The first wall 114 and the second wall 115 are spaced apart along the circumferential direction of the receiving groove 111. The receiving groove 111 also includes a third wall 120, which is located between the first wall 114 and the second wall 115 along the circumferential direction of the receiving groove 111. The first wall 114 and the second wall 115 are connected by the third wall 120. Preferably, the groove wall of the receiving groove 111 includes the first wall 114, the second wall 115, and the third wall 120. One end of the third wall 120 along the circumferential direction of the receiving groove 111 is connected to the first wall 114, and the other end of the third wall 120 along the circumferential direction of the receiving groove 111 is connected to the second wall 115.

[0091] The first wall 114, the second wall 115, and the third wall 120 together form the engaging groove 113. The third wall 120 is located above the engaging groove 113 along the depth direction of the receiving groove 111. The engaging groove 113 includes a first groove wall, a second groove wall, and a groove bottom. The first groove wall is spaced apart from the second groove wall along the circumferential direction of the receiving groove 111. The surface of the first wall 114 forms the first groove wall of the engaging groove 113. The surface of the second wall 115 forms the second groove wall of the engaging groove 113. The surface of the third wall 120 forms the groove bottom of the engaging groove 113.

[0092] Referring to Figure 4, the protective member 130 includes a body 133 located within the receiving opening 112. The shape of the body 133 matches the shape of the receiving opening 112. The body 133 fits into the receiving groove 111. Preferably, the body 133 fits into the wall of the receiving groove 111. This prevents impurities from falling into the receiving groove 111. The body 133 has a protective hole 131. The protective hole 131 penetrates the body 133 along its axial direction. The axial direction of the body 133 is parallel to the depth direction of the receiving groove 111.

[0093] The protective member 130 also includes a protrusion 132 that protrudes outward from the protective member 130. The protrusion 132 is connected to the body 133. The protrusion 132 may be integrally formed with the body 133. The protrusion 132 protrudes from the body 133 along the radial direction of the protective member 130. The body 133 includes an outer peripheral surface connected to the protrusion 132. The outer peripheral surface surrounds the body 133. The protrusion 132 protrudes from the outer peripheral surface of the body 133 along the radial direction of the body 133 in a direction away from the protective hole 131.

[0094] As shown in Figures 3, 5, and 6, the protrusion 132 can be located in the engaging groove 113. The engaging groove 113 and the protrusion 132 can engage. The protrusion 132 can abut against the bottom of the engaging groove 113. The bottom of the engaging groove 113 and the protrusion 132 can abut against each other along the depth direction of the receiving groove 111. The engaging groove 113 can restrict the protrusion 132 from moving upward along the depth direction of the receiving groove 111. The engaging groove 113 can restrict the protrusion 132 from moving towards the top edge of the receiving groove 111 along the depth direction of the receiving groove 111. The engaging groove 113 can restrict the protrusion 132 from moving towards the top of the 3D printer 200 along the depth direction of the receiving groove 111.

[0095] In one embodiment, the receiving groove includes a limiting platform, and the protective member includes a protrusion. The limiting platform is used to restrict the protrusion from disengaging from the engaging groove. Specifically, the receiving groove further includes a detachable cover, which cooperates with the receiving groove to form the limiting platform. The receiving groove also includes a communicating groove extending along the depth direction of the receiving groove, which can accommodate the movement of the protrusion. The protrusion may be a partial boss extending radially along the protective member, or an annular flange or platform extending circumferentially along the protective member. It is understood that the communicating groove may be a guide groove provided on the inner wall of the receiving groove, or a deep groove without a guiding function, as long as it can accommodate the protruding movement of the protective member.

[0096] Further, as shown in Figure 6, the first wall 114 restricts the protrusion 132 from moving circumferentially along the receiving groove 111. The second wall 115 restricts the protrusion 132 from moving in the opposite direction circumferentially along the receiving groove 111. The third wall 120 restricts the protrusion 132 from moving along the depth direction of the receiving groove 111. The third wall 120 is located above the protrusion 132 along the depth direction of the receiving groove 111. The third wall 120 restricts the protrusion 132 from moving upward along the depth direction of the receiving groove 111. The third wall 120 restricts the protrusion 132 from moving towards the top of the 3D printer 200 along the depth direction of the receiving groove 111. Thus, the protrusion 132 is prevented from disengaging from the engaging groove 113.

[0097] To facilitate the movement of the protective member 130 along the depth direction of the receiving groove 111, as shown in Figures 5 to 8, the receiving groove 111 further includes a connecting groove 116, which communicates with the engaging groove 113. The connecting groove 116 extends along the depth direction of the receiving groove 111. The length direction of the connecting groove 116 is parallel to the depth direction of the receiving groove 111. The protrusion 132 located in the engaging groove 113 can move into the connecting groove 116. The protrusion 132 can move along the length direction of the connecting groove 116. The protrusion 132 can move downward along the depth direction of the receiving groove 111 in the connecting groove 116. The protrusion 132 can move away from the engaging groove 113 along the depth direction of the receiving groove 111 in the connecting groove 116. The protrusion 132 can also move upward along the depth direction of the receiving groove 111 in the connecting groove 116. The protrusion 132 can also move in the connecting groove 116 along the depth direction of the receiving groove 111 toward the engaging groove 113. In this way, the protrusion 132 can move along the depth direction of the receiving groove 111, and the connecting groove 116 can also guide the protrusion 132.

[0098] Optionally, as shown in Figure 3, the receiving groove 111 further includes an inlet hole 117, which communicates with the outside of the receiving groove 111. The inlet hole 117 communicates with the outside of the receiving groove 111 along the depth direction of the receiving groove 111. The inlet hole 117 is connected to the engaging groove 113. The protrusion 132 enters into the engaging groove 113 through the inlet hole 117. As shown in Figure 6, the inlet hole 117 includes a first hole 121 and a second hole 122, which communicate with each other. The length direction of the first hole 121 is parallel to the depth direction of the receiving groove 111. The first hole 121 communicates with the outside of the receiving groove 111 along the depth direction of the receiving groove 111. One end of the first hole 121 includes an opening, which is open. The opening of the first hole 121 opens upwards. The opening of the first hole 121 faces the top of the 3D printer 200. One end of the first hole 121 along the depth direction of the receiving groove 111 communicates with the outside of the receiving groove 111. The other end of the first hole 121 communicates with the second hole 122. The other end of the first hole 121 along the depth direction of the receiving groove 111 communicates with the second hole 122. The protrusion 132 can enter the first hole 121 through one end of the first hole 121. The protrusion 132 can also move in the first hole 121 along the depth direction of the receiving groove 111. The protrusion 132 moves downward in the first hole 121 along the depth direction of the receiving groove 111. The protrusion 132 moves away from the receiving opening 112 in the first hole 121 along the depth direction of the receiving groove 111. The protrusion 132 can also move upward in the first hole 121 along the depth direction of the receiving groove 111. The protrusion 132 moves towards the receiving opening 112 in the first hole 121 along the depth direction of the receiving groove 111.

[0099] The second hole 122 intersects the first hole 121. The length direction of the second hole 122 is parallel to the circumferential direction of the receiving groove 111. The second hole 122 connects the first hole 121 and the engaging groove 113. The second hole 122 connects to the first hole 121 along the circumferential direction of the receiving groove 111. The second hole 122 also connects to the engaging groove 113 along the circumferential direction of the receiving groove 111. One end of the second hole 122 along the circumferential direction of the receiving groove 111 connects to the first hole 121. The other end of the second hole 122 connects to the engaging groove 113. The other end of the second hole 122 along the depth direction of the receiving groove 111 connects to the engaging groove 113. The third wall 120 is located above the second hole 122. The third wall 120 is located above the second hole 122 along the depth direction of the receiving groove 111. The third wall 120 is closer to the top of the 3D printer 200 than the second hole 122 along the depth direction of the receiving groove 111.

[0100] The protrusion 132 located in the first hole 121 can enter the second hole 122. The protrusion 132 can enter the second hole 122 through one end. The protrusion 132 can also move in the second hole 122 along the circumferential direction of the receiving groove 111. The protrusion 132 moves in the second hole 122 towards the engaging groove 113 along the circumferential direction of the receiving groove 111. The protrusion 132 moves from the first hole 121 through the second hole 122 into the engaging groove 113. The protrusion 132 can also move in the engaging groove 113 towards the first hole 121 along the circumferential direction of the receiving groove 111. The protrusion 132 moves from the engaging groove 113 through the second hole 122 into the first hole 121.

[0101] As shown in Figure 3, the first wall 114 includes a first side and a second side, which are located on both sides of the first wall 114 along the circumferential direction of the receiving groove 111. The second wall 115 includes a third side and a fourth side, which are located on both sides of the second wall 115 along the circumferential direction of the receiving groove 111.

[0102] The first side of the first wall 114 is opposite to the third side of the second wall 115 along the circumferential direction of the receiving groove 111. The third wall 120 is located between the first side of the first wall 114 and the third side of the second wall 115. The first side of the first wall 114 and the third side of the second wall 115 together form the engaging groove 113.

[0103] The first wall 114 is spaced apart from the other second wall 115. The second side of the first wall 114 faces the fourth side of the other second wall 115 along the circumferential direction of the receiving groove 111. The second side of the first wall 114 is spaced apart from the fourth side of the other second wall 115. The second side of the first wall 114, along the circumferential direction of the receiving groove 111, and the fourth side of the other second wall 115 together form the inlet hole 117.

[0104] As shown in Figure 6, one second wall 115 is spaced apart from another second wall 115. The third side of one second wall 115 is opposite to the fourth side of the other second wall 115 along the circumferential direction of the receiving groove 111. The third side of one second wall 115 is spaced apart from the fourth side of the other second wall 115. The third side of one second wall 115 is spaced apart from the fourth side of the other second wall 115 along the circumferential direction of the receiving groove 111. The third side of one second wall 115 and the fourth side of the other second wall 115 together form a communicating groove 116 along the circumferential direction of the receiving groove 111.

[0105] The protrusion 132 is movable between an unlocked position and a locked position. In the unlocked position, the protrusion 132 is in the inlet hole 117, allowing the protective member 130 to separate from the receiving groove 111. In the unlocked position, the protrusion 132 is located in the first hole 121. In the unlocked position, the protrusion 132 is movable to the outside of the receiving groove 111. In the unlocked position, the protrusion 132 can be detached from the receiving groove 111. This allows the protective member 130 to be separated from the receiving groove 111, facilitating installation. In the unlocked position, the protrusion 132 is movable to the locked position along the circumferential direction of the receiving groove 111. In the unlocked position, the protrusion 132 can move through the second hole 122 into the engaging groove 113.

[0106] The protrusion 132, located in the unlocked position, can move circumferentially along the receiving groove 111 to the locked position. The protrusion 132, located in the unlocked position, moves through the second hole 122 to the locked position. The protrusion 132, located in the unlocked position, moves from the first hole 121 to the locked position. The protrusion 132, located in the unlocked position, moves from the first hole 121 through the second hole 122 to the engaging groove 113. The protrusion 132, located in the unlocked position, moves from the first hole 121 through the second hole 122 along the circumferential direction of the receiving groove 111 to the engaging groove 113.

[0107] As shown in Figures 3 and 6, the protrusion 132 in the locking position is in the engaging groove 113 to lock the protective member 130 and the fixing member 110. The protrusion 132 in the locking position engages with the engaging groove 113. The first wall 114 restricts the movement of the protrusion 132 in the locking position along the circumferential direction of the receiving groove 111. The second wall 115 restricts the movement of the protrusion 132 in the locking position in the opposite direction along the circumferential direction of the receiving groove 111. The third wall 120 restricts the movement of the protrusion 132 in the locking position upward along the depth direction of the receiving groove 111. The third wall 120 restricts the movement of the protrusion 132 in the locking position towards the top of the 3D printer 200 along the depth direction of the receiving groove 111. When the protrusion 132 is in the locking position, the first wall 114 limits the protrusion 132, allowing the protrusion 132 to move along the depth direction of the receiving groove 111 without dislodging it.

[0108] The protrusion 132 in the locked position can also move in the reverse direction along the circumferential direction of the receiving groove 111 to the unlocked position. The protrusion 132 in the locked position moves in the reverse direction through the second hole 122 to the unlocked position. The protrusion 132 in the locked position moves in the reverse direction from the engaging groove 113 to the unlocked position. The protrusion 132 in the locked position moves in the reverse direction from the engaging groove 113 through the second hole 122 to the first hole 121. The protrusion 132 in the locked position moves in the reverse direction from the engaging groove 113 through the second hole 122 along the circumferential direction of the receiving groove 111 to the first hole 121. Thus, the protective member 130 can be separated from the receiving groove 111, allowing the protective member 130 to be removed from the fixing member 110. The operator can press down and rotate the protective member 130 to disassemble it.

[0109] As shown in Figures 3 and 6, the first wall 114 further includes a first inclined surface 118 facing the engaging groove 113. The first inclined surface 118 extends downward at an incline from the engaging groove 113 toward the entry hole 117. The first inclined surface 118 slopes downward. The first inclined surface 118 slopes downward from the end of the first wall 114 along the depth direction of the receiving groove 111 toward the entry hole 117. The first inclined surface 118 slopes downward from the end of the first wall 114 along the depth direction of the receiving groove 111 toward the entry hole 117. The first inclined surface 118 can guide the movement of the protrusion 132. In particular, the first inclined surface 118 guides the movement of the protrusion 132 located in the engaging groove 113 to the entry hole 117. The first inclined surface 118 guides the movement of the protrusion 132 from the locked position to the unlocked position. When the protrusion 132 needs to separate from the receiving groove 111, the protrusion 132 located in the engaging groove 113 moves downward along the depth direction of the receiving groove 111 to the second hole 122. The protrusion 132 contacts the first inclined surface 118, which guides the protrusion 132 to move towards the first hole 121 along the circumferential direction of the receiving groove 111. The operator can first press down the protective member 130 to move it along the first inclined surface 118, and then rotate the protective member 130 so that the protective member 130 rotates around the axial direction of the receiving groove 111, causing the protective member 130 to rotate and move into the first hole 121.

[0110] The receiving groove 111 also includes a second inclined surface 119, which is located at the bottom of the inlet hole 117. Specifically, the second inclined surface 119 is located at the bottom of the second hole 122. The second inclined surface 119 faces the first wall 114. The first wall 114 is spaced apart from the second inclined surface 119 along the depth direction of the receiving groove 111. The second hole 122 is formed between the first wall 114 and the second inclined surface 119 along the depth direction of the receiving groove 111. The second inclined surface 119 extends upward at an angle from the engaging groove 113 toward the inlet hole 117. The second inclined surface 119 is inclined upward. When the protrusion 132 in the engaging groove 113 moves to the inlet hole 117, the second inclined surface 119 avoids colliding with the protrusion 132. This allows the protrusion 132 to be spaced apart from the first wall 114 in the circumferential direction of the receiving groove 111 within the communicating groove 116. When the protrusion 132 in the locked position moves to the unlocked position, the second inclined surface 119 avoids colliding with the protrusion 132.

[0111] The protective member 130 is movable between a protective position and a compression position. The protective member 130 in the protective position is closer to the first linear bearing than the protective member 130 in the compression position. The protective member 130 in the protective position can be higher than the receiving opening 112. The protective member 130 in the protective position can protrude from the receiving opening 112. The protective member 130 in the protective position can protrude from the receiving opening 112 along the depth direction of the receiving groove 111. The protective member 130 in the protective position can also be flush with the receiving opening 112. The protective member 130 in the protective position can prevent impurities from entering the receiving opening 112. The protective member 130 in the protective position can be moved to the compression position.

[0112] In the embodiment shown in FIG6, the protective member 130 in the protective position is located in the engaging groove 113. The engaging groove 113 can restrict the movement of the protective member 130 in the protective position. For example, the engaging groove 113 can restrict the movement of the protective member 130 in the protective position along the circumferential direction of the receiving groove 111. The first wall 114 abuts against the protective member 130 in the protective position. The first wall 114 abuts against the protrusion 132 in the protective position. The first wall 114 can restrict the movement of the protective member 130 in the protective position along the circumferential direction of the receiving groove 111. The second wall 115 abuts against the protective member 130 in the protective position. The second wall 115 abuts against the protrusion 132 in the protective position. The second wall 115 can restrict the movement of the protective member 130 in the protective position in the opposite direction along the circumferential direction of the receiving groove 111. The engaging groove 113 can also restrict the movement of the protective member 130 in the protective position upward along the depth direction of the receiving groove 111. The engaging groove 113 also restricts the movement of the protective member 130 in the protected position toward the top of the 3D printer 200 along the depth direction of the receiving groove 111. The third wall 120 abuts against the protective member 130 in the protected position. The third wall 120 abuts against the protrusion 132 in the protected position. The third wall 120 restricts the movement of the protective member 130 in the protected position along the depth direction of the receiving groove 111.

[0113] As shown in Figures 7 and 8, the protective member 130 in the protective position can move to the compression position along the depth direction of the receiving groove 111. The protective member 130 in the compression position is lower than the receiving opening 112. The first linear bearing moves along the height direction of the first heated bed lifting assembly. The first linear bearing can apply a force to the protective member 130 in the protective position. The first linear bearing pushes the protective member 130 in the protective position downwards. Thus, the heated bed 210 can be guaranteed to have sufficient movement space, increasing the overall space and achieving high space utilization. The protective member 130 in the compression position is located in the connecting groove 116. The protrusion 132 in the compression position is in the connecting groove 116. The protective member 130 in the protective position moves from the engaging groove 113 to the connecting groove 116. The protrusion 132 in the connecting groove 116 can move to the compression position. The protrusion 132 in the connecting groove 116 can move along the depth direction of the receiving groove 111. The connecting groove 116 can guide the movement of the protrusion 132. This prevents the protrusion 132 from shifting or deviating, allowing the protrusion 132 to move into place.

[0114] The elastic member 150 is capable of absorbing the movement of the first linear bearing. Specifically, the elastic member 150 is capable of absorbing the movement of the first linear bearing along the height direction of the 3D printer 200. The protective member 130, located in the protective position, moving towards the compression position can compress the elastic member 150. The elastic member 150 undergoes elastic deformation along the depth direction of the receiving groove 111. The elastic member 150 applies an elastic force to the protective member 130 located in the compression position. The elastic member 150 is capable of causing the protective member 130 located in the compression position to return to its original position. The elastic member 150 is capable of causing the protective member 130 located in the compression position to move to the protective position.

[0115] As shown in Figure 1, the elastic member 150 includes a first end 151 and a second end 152, which are located at opposite ends of the elastic member 150 along the elastic deformation direction. The first end 151 of the elastic member 150 abuts against the protective member 130. The protective member 130, located in the protective position, can apply a force to the first end 151 of the elastic member 150 to compress the elastic member 150. The elastic member 150 can apply an elastic force to the protective member 130 in the compressed position through its first end 151, causing the protective member 130 to return to the protective position. The second end 152 of the elastic member 150 abuts against the receiving groove 111. Preferably, the second end 152 of the elastic member 150 abuts against the bottom of the receiving groove 111. The bottom of the receiving groove 111 can support the second end 152 of the elastic member 150. This ensures that the elastic member 150 has sufficient elastic force.

[0116] To save space, the first end 151 and the second end 152 of the elastic member 150 have different dimensions. The elastic member 150 can be constructed as a spring. Preferably, the elastic member 150 can be constructed as a tower spring. The elastic member 150 can be constructed as a pagoda-shaped spring. In this way, horizontal spatial movement can be used to absorb vertical spatial movement. The elastic member 150 absorbs the Z-direction movement space through spatial movement in the X and Y directions, ensuring elastic force while absorbing 20mm of movement space. The elastic member 150 includes a free state and a compressed state. The elastic member 150 in the free state abuts against the protective member 130 in the protective position, and the elastic member 150 in the compressed state abuts against the protective member 130 in the compressed position. The elastic member 150 in the free state is higher than the elastic member 150 in the compressed state to ensure sufficient elastic force to move the protective member 130 to the protective position. The elastic member 150 in the compressed state can apply an elastic force to the protective member 130 in the compressed position.

[0117] The first end 151 of the elastic member 150 in its free state protrudes from the second end 152 of the elastic member 150. As an alternative embodiment, the size of the first end 151 of the elastic member 150 is smaller than the size of the second end 152 of the elastic member 150. The first end 151 of the elastic member 150 in its compressed state is housed within the elastic member 150. This reduces the space occupied by the elastic member 150 in its compressed state, thereby increasing the movement displacement of the protective member 130, increasing the overall machine space, and achieving high space utilization. This also expands the movement displacement of the first linear bearing.

[0118] In another alternative implementation, the second end 152 of the elastic member 150 is smaller than the first end 151 of the elastic member 150. The second end 152 of the elastic member 150 in the compressed state is housed within the elastic member 150. This reduces the space occupied by the compressed elastic member 150, thereby increasing the movement displacement of the protective member 130, increasing the overall machine space, and achieving high space utilization. This also expands the movement displacement of the first linear bearing.

[0119] Optionally, as shown in Figures 14 and 15, the edge of the receiving groove 111 of the dustproof assembly 100 is flush with the surface of the base plate 211 facing the heated bed, or the edge of the receiving groove 111 of the dustproof assembly 100 is slightly higher than the surface of the base plate 211 facing the heated bed. Alternatively, the edge of the receiving opening 112 of the receiving groove 111 of the dustproof assembly 100 is flush with the surface of the base plate 211 facing the heated bed, or the edge of the receiving opening 112 of the receiving groove 111 of the dustproof assembly 100 is slightly higher than the surface of the base plate 211 facing the heated bed. The edge of the receiving opening 112 of the receiving groove 111 of the dustproof assembly 100 protrudes from the surface of the base plate 211 facing the heated bed. This allows for easy disassembly of the dustproof assembly 100, which is detachably connected to the base plate 211. Optionally, a first bearing 212 is provided at the bottom end of the first lead screw 203, located below the first lead screw nut. The edge of the first bearing 212 may be flush with the surface of the base plate 211 facing the heated bed, or the edge of the first bearing 212 may be slightly higher than the base plate 211. The edge of the first bearing 212 may be higher than the base plate 211. The edge of the first bearing 212 may protrude from the base plate 211. The first bearing 212 includes a first upper portion that protrudes from the base plate 211 along the height direction of the 3D printer, or the first upper portion may be flush with the surface of the base plate 211 facing the heated bed along the height direction of the 3D printer. Therefore, the first heated bed lifting assembly can be easily disassembled by striking the first upper part of the first bearing 212. The first heated bed lifting assembly is detachably connected to the base plate 211.

[0120] Optionally, a second bearing is provided at the bottom end of the second lead screw, located below the second lead screw nut. The edge of the second bearing may be flush with the surface of the base plate 211 facing the heated bed, or the edge of the second bearing may be slightly higher than the base plate 211. The edge of the second bearing may protrude from the base plate 211. The second bearing includes a second upper part, which protrudes from the base plate 211 along the height direction of the 3D printer, or the second upper part may be flush with the surface of the base plate 211 facing the heated bed along the height direction of the 3D printer. Thus, the second heated bed lifting assembly, which is detachably connected to the base plate 211, can be easily disassembled by tapping the second upper part of the second bearing.

[0121] Optionally, as shown in Figure 16, a third bearing 213 is provided at the bottom end of the third lead screw 208, located below the third lead screw nut. The edge of the third bearing 213 may be flush with the surface of the base plate 211 facing the heated bed, or the edge of the third bearing 213 may be slightly higher than the base plate 211. The edge of the third bearing 213 may be higher than the base plate 211. The edge of the third bearing 213 may protrude from the base plate 211. The third bearing 213 includes a third upper part, which protrudes from the base plate 211 along the height direction of the 3D printer, or the third upper part may be flush with the surface of the base plate 211 facing the heated bed along the height direction of the 3D printer. Thus, the third heated bed lifting assembly, which is detachably connected to the base plate 211, can be easily disassembled by tapping the third upper part of the third bearing 213.

[0122] This application also provides a 3D printer 200, which includes a heated bed 210, a heated bed lifting assembly, and the aforementioned dustproof assembly 100.

[0123] The 3D printer 200 utilizes FDM (Fused Deposition Modeling) technology for printing. The 3D printer 200 includes a tool head and a heated bed 210. The tool head is movable. When the tool head moves to a preset position, it heats and melts a filament of thermoplastic material, extruding it through the nozzle of the tool head and stacking it layer by layer from bottom to top on the heated bed 210 to build an object. In this embodiment, "bottom" refers to the direction towards the bottom of the 3D printer 200, and "top" refers to the direction towards the top of the 3D printer 200. The tool head includes an extrusion assembly and a hot end. The extrusion assembly conveys the printing material supplied to the 3D printer 200 by the feeding device to the hot end. The hot end has a heating function, heating the printing material to a molten state and extruding the molten printing material onto the heated bed 210.

[0124] For example, the hot end includes heat dissipation fins, a nozzle, and a throat located between the heat dissipation fins and the nozzle. The printing material passes sequentially through the heat dissipation fins, the throat, and the nozzle. Specifically, the printing material is heated to a molten state at the nozzle, and the nozzle extrudes the molten printing material onto the heated bed 210.

[0125] The heated bed lifting assembly adjusts the position of the heated bed 210 along the height direction of the 3D printer 200. The bottom end of the heated bed lifting assembly is connected to the dustproof assembly 100. The bottom end of the heated bed lifting assembly is located at the bottom of the heated bed lifting assembly along its height direction. The height direction of the heated bed lifting assembly is parallel to the height direction of the 3D printer 200. The heated bed lifting assembly is connected to the heated bed 210. The tool head can move along the height direction of the heated bed lifting assembly to achieve material stacking. During its movement along the printing path, the nozzle extrudes molten printing material layer by layer at different positions on the heated bed 210, thereby printing a three-dimensional object.

[0126] As shown in Figures 9 and 10, the heated bed lifting assembly includes a lead screw and an optical axis, which are arranged in parallel. The 3D printer 200 also includes a pulley connected to the lead screw. Rotation of the pulley drives the lead screw to rotate. A retaining pin 204 is provided at the bottom end of the lead screw. The retaining pin 204 can be connected to the axis of the pulley. The cross-sectional shape of the retaining pin 204 can be constructed as a "D". Rotation of the pulley drives the retaining pin 204 to rotate, thereby driving the lead screw to rotate. The pulley can be connected to the fixing member 110 to prevent the pulley from falling off. The tool head is movably connected to the lead screw, and the optical axis guides the movement of the tool head. The optical axis is connected to the dustproof assembly 100. The bottom end of the optical axis is connected to the dustproof assembly 100.

[0127] The 3D printer 200 also includes a chamber in which a tool head and a heated bed 210 are disposed. The 3D printer 200 further includes a heated bed connector connected to the heated bed 210. The heated bed connector connects the heated bed lifting assembly and the heated bed 210, allowing the heated bed 210 to move along the height direction of the heated bed lifting assembly. One end of the heated bed connector is connected to the heated bed lifting assembly. Preferably, the heated bed connector is located below the heated bed 210. The heated bed connector is located below the heated bed 210 along the height direction of the 3D printer 200. The other end of the heated bed connector is connected to the heated bed 210. In this embodiment, "bottom surface of the heated bed 210" refers to the surface of the heated bed 210 facing the bottom of the 3D printer 200.

[0128] The lead screw is equipped with a lead screw nut, which is connected to the heated bed connector. The lead screw nut can move along the height direction of the lead screw, thereby driving the heated bed connector to move along the height direction of the lead screw. The optical shaft is equipped with a linear bearing, which is connected to the heated bed connector. The linear bearing guides the heated bed connector as it moves along the height direction of the lead screw.

[0129] According to the 3D printer 200 of this application, the 3D printer 200 includes a heated bed, a heated bed lifting assembly, and the aforementioned dustproof assembly 100. The heated bed lifting assembly adjusts the position of the heated bed along the height direction of the 3D printer 200. The bottom end of the heated bed lifting assembly is connected to the dustproof assembly 100. The dustproof assembly 100 includes a fixing member 110, a protective member 130, and an elastic member 150. The fixing member 110 is used to connect to the bottom end of the heated bed lifting assembly. The fixing member 110 includes a receiving groove 111, and the receiving groove 111 includes a receiving opening 112. The protective member 130 is movably disposed in the receiving groove 111 and covers the receiving opening 112. The elastic member 150 is located in the receiving groove 111, and both ends of the elastic member 150 abut against the protective member 130 and the receiving groove 111, respectively. The 3D printer 200 also includes a pulley, which is connected to the fixing member 110. The heated bed lifting assembly includes a lead screw and an optical shaft. The lead screw is connected to the pulley, and the optical shaft is connected to the receiving groove 111. In this way, the dustproof component 100 can accommodate the heated bed lifting component, increasing the overall machine space; the protective component 130 can prevent debris from entering the receiving slot 111; the protective component 130 and the receiving slot 111 are easy to install; and the elastic component 150 can allow the protective component 130 to return to its original position, making it easy to assemble and disassemble, and preventing it from falling off during movement. The 3D printer 200 includes at least two heated bed lifting components, including a first heated bed lifting component and a second heated bed lifting component. The first heated bed lifting component is spaced apart from the second heated bed lifting component along the depth direction of the 3D printer 200. The depth direction of the 3D printer 200 is parallel to the Y-axis direction. The first heated bed lifting component is spaced apart from the second heated bed lifting component along the Y-axis direction of the 3D printer 200.

[0130] The 3D printer 200 includes a door panel and a back panel, which are arranged opposite to each other. The door panel and back panel are spaced apart along the depth direction of the 3D printer 200. The depth direction of the 3D printer 200 is perpendicular to the height direction of the 3D printer 200. The door panel can be opened to facilitate the removal of objects from the chamber. A first heated bed lifting assembly is closer to the back panel than a second heated bed lifting assembly. The second heated bed lifting assembly is closer to the front panel than the first heated bed lifting assembly.

[0131] The second heated bed lifting assembly is closer to the panel than the first heated bed lifting assembly. At least two heated bed lifting assemblies include at least two second heated bed lifting assemblies, which are spaced apart along the width direction of the 3D printer 200. The width direction of the 3D printer 200 is perpendicular to its depth direction. The width direction of the 3D printer 200 is perpendicular to its height direction. The width direction of the 3D printer 200 is parallel to the X-axis direction. The two second heated bed lifting assemblies are spaced apart along the X-axis direction of the 3D printer 200.

[0132] The first heated bed lifting assembly is connected to the dustproof assembly 100. The first heated bed lifting assembly includes a first linear bearing, a first optical axis 201, and a first lead screw 203. The first linear bearing is sleeved onto the first optical axis 201. The first linear bearing can be connected to the heated bed 210. The first heated bed lifting assembly also includes a first heated bed connector, which is connected to the heated bed 210. The first linear bearing is connected to the heated bed 210 via the first heated bed connector. The first linear bearing is movable relative to the first optical axis 201 along the height direction of the 3D printer 200. The first optical axis 201 is positioned closer to the heated bed 210 relative to the first lead screw 203. The first optical axis 201 is positioned closer to the heated bed 210 relative to the first lead screw 203 along the depth direction of the 3D printer 200.

[0133] The second heated bed lifting assembly includes a second linear bearing and a second optical axis 205, with the second linear bearing sleeved onto the second optical axis 205. The second linear bearing is connectable to the heated bed 210. The second heated bed lifting assembly also includes a second heated bed connector, which is connected to the heated bed 210. The second linear bearing is connected to the heated bed 210 via the second heated bed connector. The second linear bearing is movable relative to the second optical axis 205 along the height direction of the 3D printer 200.

[0134] To avoid collision between the first linear bearing and the tool head, the first linear bearing does not protrude from the upper surface of the heated bed 210. The first linear bearing does not protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200. The second linear bearing may protrude from the upper surface of the heated bed 210. The second linear bearing may protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200. Therefore, the lower end face of the first linear bearing is not flush with the lower end face of the second linear bearing. In this embodiment, "lower end face of the first linear bearing" refers to the surface of the first linear bearing facing the bottom of the 3D printer 200, and "lower end face of the first linear bearing" refers to the surface of the second linear bearing facing the bottom of the 3D printer 200. The first linear bearing protrudes downwards from the second linear bearing along the height direction of the 3D printer 200. The first linear bearing protrudes from the second linear bearing in the direction towards the bottom of the 3D printer 200 along the height direction of the 3D printer 200. There is a height difference between the lower end face of the first linear bearing and the lower end face of the second linear bearing. The lower end face of the second linear bearing is higher than the lower end face of the first linear bearing.

[0135] When the heated bed 210 moves to its lowest limit position on the 3D printer 200, a portion of the first linear bearing is housed in the dustproof assembly 100 to avoid interference. The dustproof assembly 100 can accommodate a portion of the first linear bearing. This expands the overall workspace of the machine, particularly in the vertical direction.

[0136] Optionally, the first heated bed lifting assembly further includes a first lead screw nut, which is sleeved onto the first lead screw 203. The first lead screw nut can be connected to the heated bed 210. The first heated bed lifting assembly also includes a first heated bed connector, which is connected to the heated bed 210. The first lead screw nut is connected to the heated bed 210 via the first heated bed connector. The first lead screw nut can move relative to the first lead screw 203 along the height direction of the 3D printer 200.

[0137] The second heated bed lifting assembly includes a second lead screw nut and a second lead rod 206, with the second lead screw nut sleeved onto the second lead rod 206. The second lead screw nut can be connected to the heated bed 210. The second heated bed lifting assembly also includes a second heated bed connector, which is connected to the heated bed 210. The second lead screw nut is connected to the heated bed 210 via the second heated bed connector. The second lead screw nut can move relative to the second lead rod 206 along the height direction of the 3D printer 200.

[0138] To avoid collision between the first lead screw nut and the tool head, the first lead screw nut does not protrude from the upper surface of the heated bed 210. The first lead screw nut does not protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200. The second lead screw nut may protrude from the upper surface of the heated bed 210. The second lead screw nut may protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200. Therefore, the lower end face of the first lead screw nut is not flush with the lower end face of the second lead screw nut. In this embodiment, "lower end face of the first lead screw nut" refers to the surface of the first lead screw nut facing the bottom of the 3D printer 200. "Lower end face of the first lead screw nut" refers to the surface of the second lead screw nut facing the bottom of the 3D printer 200. The first lead screw nut protrudes downwards from the second lead screw nut along the height direction of the 3D printer 200. The first lead screw nut protrudes towards the bottom of the 3D printer 200 along the height direction of the 3D printer 200. There is a height difference between the lower end face of the first leadscrew nut and the lower end face of the second leadscrew nut. The lower end face of the second leadscrew nut is higher than the lower end face of the first leadscrew nut.

[0139] As shown in Figures 11 to 13, the 3D printer 200 includes three heated bed lifting assemblies, which can be arranged in a triangular configuration to support the heated bed. The 3D printer 200 includes a first heated bed lifting assembly and two sets of second heated bed lifting assemblies (for ease of distinction, the two sets of second heated bed lifting assemblies are referred to as the second heated bed lifting assembly and the third heated bed lifting assembly, respectively), arranged in a triangular configuration. The first heated bed lifting assembly is closer to the back plate of the 3D printer 200 than the second heated bed lifting assembly. The second heated bed lifting assembly is closer to the front panel of the 3D printer 200 than the first heated bed lifting assembly. The first heated bed lifting assembly is closer to the back plate of the 3D printer 200 than the third heated bed lifting assembly. The third heated bed lifting assembly is closer to the front panel of the 3D printer 200 than the first heated bed lifting assembly.

[0140] The first heated bed lifting assembly is located to the side of the heated bed 210 along the depth direction of the 3D printer 200. The first heated bed lifting assembly includes a first optical axis 201, a first lead screw 203, a first linear bearing, a first lead screw nut, and a first heated bed connector. The first optical axis 201 and the first lead screw 203 are parallel. The first optical axis 201 and the first lead screw 203 are arranged at intervals along the depth direction of the 3D printer 200. The first optical axis 201 and the first lead screw 203 are parallel along the depth direction of the 3D printer 200. The projections of the first optical axis 201 and the first lead screw 203 along the depth direction of the 3D printer 200 coincide.

[0141] The second heated bed lifting assembly is located to the side of the heated bed 210 along the width direction of the 3D printer 200. The second heated bed lifting assembly includes a second optical axis 205, a second lead screw 206, a second linear bearing, a second lead screw nut, and a second heated bed connector. The second optical axis 205 and the second lead screw 206 are spaced apart along the depth direction of the 3D printer 200. The second optical axis 205 and the second lead screw 206 are also spaced apart along the width direction of the 3D printer 200. The line connecting the second optical axis 205 and the second lead screw 206 forms an inclined angle with the depth direction of the 3D printer 200. The projections of the second optical axis 205 and the second lead screw 206 along the depth direction of the 3D printer 200 are completely offset. The projections of the second optical axis 205 and the second lead screw 206 along the width direction of the 3D printer 200 are also completely offset.

[0142] The third heated bed lifting assembly is located to the side of the heated bed 210 along the width direction of the 3D printer 200. The third heated bed lifting assembly includes a third optical axis 207, a third lead screw 208, a third linear bearing, a third lead screw nut, and a third heated bed connector. The third optical axis 207 and the third lead screw 208 are arranged at intervals along the depth direction of the 3D printer 200. The third optical axis 207 and the third lead screw 208 are arranged at intervals along the width direction of the 3D printer 200. The line connecting the third optical axis 207 and the third lead screw 208 forms an inclined angle with the depth direction of the 3D printer 200. The projections of the third optical axis 207 and the third lead screw 208 along the depth direction of the 3D printer 200 are completely offset. The projections of the third optical axis 207 and the third lead screw 208 along the width direction of the 3D printer 200 are completely offset.

[0143] The bottom of the first lead screw is connected to the base plate 211. The top of the first lead screw is movable. The bottom of the first optical axis 201 is connected to the base plate 211. The top of the first optical axis 201 is movable. Both the first lead screw 203 and the first optical axis 201 bear the bending moment applied by the heated bed 210. The axes of the second and third optical axes lie in a plane that is the first plane. The first lead screw and the first optical axis are arranged in a direction perpendicular to the first plane. The first optical axis 201 is closer to the heated bed 210 than the first lead screw 203 along the depth direction of the 3D printer 200. The first lead screw nut is farther away from the heated bed 210 than the first linear bearing. It is understood that the load-bearing capacity of the first linear bearing is higher than that of the first lead screw nut, and bending of the first lead screw nut will have a greater impact on the 3D printing quality. In one embodiment, the contact length between the first lead screw nut and the first lead screw 203 is less than the contact length between the first linear bearing and the first optical axis 201. Thus, the first optical axis 201 and the first linear bearing have a longer contact length to reduce the bending moment borne by the first lead screw nut. The second lead screw 206 is closer to the heated bed 210 along the width direction of the 3D printer 200 than the second optical axis 205. The third lead screw 208 is closer to the heated bed 210 along the width direction of the 3D printer 200 than the third optical axis 207.

[0144] The first linear bearing is closer to the tool head than the first leadscrew nut. The first linear bearing is more likely to collide with the tool head than the first leadscrew nut. To avoid collision between the first linear bearing and the tool head, the first linear bearing does not protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200. The first linear bearing protrudes from the lower surface of the heated bed 210 along the height direction of the 3D printer 200. The second linear bearing is farther from the tool head than the second leadscrew nut. The first linear bearing is more likely to collide with the tool head than the second linear bearing. The second linear bearing may protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200. The third linear bearing is farther from the tool head than the third leadscrew nut. The first linear bearing is more likely to collide with the tool head than the third linear bearing. The third linear bearing may protrude from the upper surface of the heated bed 210 along the height direction of the 3D printer 200.

[0145] The length of the first linear bearing protruding from the lower surface of the heated bed 210 is greater than the length of the second or third linear bearing protruding from the lower surface of the heated bed 210. When the heated bed 210 moves to the lower limit position, the lower end face of the second or third linear bearing is flush with the plane of the base plate 211 or has a small gap. Thus, to avoid interference between the first linear bearing and the base plate 211 or the dustproof assembly 100 when the heated bed 210 is in the lower limit position, the dustproof assembly can at least partially accommodate the first linear bearing. In particular, the dustproof assembly can accommodate the first linear bearing when the heated bed 210 is in the lower limit position. The dustproof assembly 100 is located below the base plate 211. The dustproof assembly 100 is located below the base plate 211 along the 3D printer. Specifically, as shown in Figures 1 and 2, the dustproof assembly 100 includes a fixing member 110 located at the bottom of the 3D printer 200. The fixing member 110 can be connected to the bottom of the chamber via a connector. A fixing member 110 is used to connect the heated bed lifting assembly. The bottom end of the heated bed lifting assembly is connected to the fixing member 110. In particular, the fixing member 110 can fix the first heated bed lifting assembly. In particular, the fixing member 110 can accommodate the bottom of the first optical axis. The first heated bed lifting assembly is connected to the fixing member 110. The bottom end of the first lifting assembly is connected to the fixing member 110. A pulley is connected to the fixing member 110. Referring to FIG3, the fixing member 110 includes a receiving groove 111 for connecting to the first heated bed lifting assembly. The receiving groove 111 includes a receiving opening 112, the opening direction of which faces upward towards the receiving groove 111. The opening direction of the receiving opening 112 faces the direction of the first linear bearing. The opening direction of the receiving opening 112 faces the direction of the first linear bearing along the height direction of the 3D printer 200. The opening direction of the receiving opening 112 faces upward along the height direction of the 3D printer 200. The first heated bed lifting assembly can enter the receiving groove 111 through the receiving opening 112.

[0146] As shown in Figure 1, the dustproof assembly 100 also includes a protective member 130, which is movably disposed in the receiving groove 111. The protective member 130 also covers the receiving opening 112. The shape of the protective member 130 matches the shape of the receiving opening 112. The protective member 130 is movable relative to the receiving groove 111. The protective member 130 can move linearly relative to the receiving groove 111. The protective member 130 is movable along the depth direction of the receiving groove 111. The protective member 130 is movable linearly along the height direction of the 3D printer 200. The protective member 130 can also rotate relative to the receiving groove 111. The protective member 130 can also rotate about the axial direction of the receiving groove 111.

[0147] The bottom end of the first heated bed lifting assembly passes through the protective member 130 and enters the receiving groove 111. The first optical axis 201 is connected to the receiving groove 111. Specifically, the bottom end 202 of the first optical axis 201 passes through the protective member 130 and enters the receiving groove 111. The protective member 130 includes a protective hole 131 that penetrates the protective member 130. The axial direction of the protective hole 131 is parallel to the depth direction of the receiving groove 111. The protective hole 131 is located at the middle of the protective member 130. This ensures coaxiality. The bottom end of the first heated bed lifting assembly enters the receiving groove 111 through the protective hole 131. The bottom end 202 of the first optical axis 201 enters the receiving groove 111 through the protective hole 131. The first optical axis 201 passes through the protective hole 131 and enters the receiving groove 111. In this way, the protective component 130 can block debris in the chamber of the 3D printer 200 and prevent debris from entering the receiving slot 111.

[0148] To prevent the protective member 130 from occupying internal space of the 3D printer 200, the dustproof assembly 100 also includes an elastic member 150, which is located in the receiving groove 111. Both ends of the elastic member 150 abut against the protective member 130 and the receiving groove 111, respectively. The elastic member 150 is capable of elastic deformation along the depth direction of the receiving groove 111. The elastic member 150 can provide a restoring force to the protective member 130. One end of the elastic member 150 along the depth direction of the receiving groove 111 abuts against the protective member 130. One end of the elastic member 150 along the depth direction of the receiving groove 111 abuts against the bottom surface of the protective member 130. In this embodiment, the "bottom surface of the elastic member 150" refers to the surface of the elastic member 150 facing the receiving groove 111. The elastic member 150 can support the protective member 130.

[0149] The other end of the elastic member 150 along the depth direction of the receiving groove 111 abuts against the receiving groove 111. The receiving groove 111 includes a groove bottom, which faces the receiving opening 112 along the depth direction of the receiving groove 111. As an alternative embodiment, the other end of the elastic member 150 along the depth direction of the receiving groove 111 may abut against the groove bottom. For example, the other end of the elastic member 150 may contact the groove bottom. The groove bottom can support the elastic member 150. The receiving groove 111 also includes a groove wall, which is disposed around the receiving groove 111. The groove wall is connected to the groove bottom. As another alternative embodiment, the other end of the elastic member 150 along the depth direction of the receiving groove 111 may also abut against the groove wall. For example, the other end of the elastic member 150 may be fixed to the groove wall. The groove wall can apply a supporting force to the elastic member 150.

[0150] The first linear bearing moves along the height direction of the first heated bed lifting assembly. When the first linear bearing moves to the bottom of the chamber, it comes into contact with the protective member 130. To avoid interference between the fixed member 110 and the first linear bearing, a portion of the first linear bearing is located in the receiving groove 111. A portion of the first linear bearing can enter the receiving groove 111 through the receiving opening 112. For example, the first linear bearing can be located in the receiving groove 111 along the bottom of the 3D printer 200. The first linear bearing applies a downward force to the protective member 130, causing the protective member 130 to move downward. The first linear bearing applies a force to the protective member 130 in a direction away from the heated bed 210, causing the protective member 130 to move in a direction away from the heated bed 210. The first linear bearing applies a force to the protective member 130 to compress the elastic member 150. The protective member 130 is able to move within the receiving groove 111. Thus, the protective member 130 does not interfere with the first linear bearing. The first linear bearing protrudes more than the second linear bearing along the height direction of the 3D printer 200. The dustproof component 100 can absorb the height of the first linear bearing protruding along the height direction of the 3D printer 200. In particular, the protective member 130 and the elastic member 150 can absorb the height of the first linear bearing protruding along the height direction of the 3D printer 200. This increases the overall machine space and improves space utilization.

[0151] The first linear bearing moves along the height direction of the first heated bed lifting assembly. The first linear bearing can apply force to the protective member 130 located in the protective position. The first linear bearing pushes the protective member 130 in the protective position downwards. This ensures that the heated bed 210 has sufficient movement space, increasing the overall machine space and achieving high space utilization. The protective member 130 in the compression position is located in the connecting groove 116. The protrusion 132 in the compression position is in the connecting groove 116. The protective member 130 in the protective position moves from the engaging groove 113 to the connecting groove 116. The protrusion 132 can move to the compression position in the connecting groove 116. The protrusion 132 can move along the depth direction of the receiving groove 111 in the connecting groove 116. The connecting groove 116 guides the movement of the protrusion 132. This prevents the protrusion 132 from shifting, ensuring that the protrusion 132 moves into place.

[0152] The first linear bearing applies a force to the protective member 130 to compress the elastic member 150. The elastic member 150 is capable of absorbing the movement of the first linear bearing. In particular, the elastic member 150 is capable of absorbing the movement of the first linear bearing along the height direction of the 3D printer 200. The movement of the protective member 130 from the protective position toward the compression position can compress the elastic member 150. The elastic member 150 undergoes elastic deformation along the depth direction of the receiving groove 111. The elastic member 150 applies an elastic force to the protective member 130 in the compression position. The elastic member 150 is capable of restoring the protective member 130 in the compression position. The elastic member 150 is capable of moving the protective member 130 from the compression position to the protective position.

[0153] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “part” or “component” appearing herein can refer to a single part or a combination of multiple parts. Terms such as “installation” or “installation” appearing herein can refer to one component being directly attached to another component or one component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0154] This application has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A dustproof assembly for a 3D printer, the 3D printer comprising a heated bed and a heated bed lifting assembly, the heated bed lifting assembly being used to adjust the position of the heated bed along the height direction of the 3D printer, characterized in that, The dustproof component includes: A fixing member is provided for connection to the bottom end of the heated bed lifting assembly, the fixing member including a receiving groove including a receiving opening; A protective member, movably disposed in the receiving groove, the protective member covering the receiving opening; An elastic member is located in the receiving groove, and both ends of the elastic member abut against the protective member and the receiving groove, respectively.

2. The dustproof component according to claim 1, characterized in that, The receiving groove includes an engaging groove, and the protective member includes a protrusion, wherein the engaging groove and the protrusion can engage, or... The receiving groove includes a limiting platform, and the protective member includes a protrusion. The limiting platform is used to restrict the protrusion from disengaging from the engaging groove.

3. The dustproof component according to claim 2, characterized in that, The receiving groove further includes a first wall, a second wall, and a third wall, wherein the first wall and the second wall are spaced apart along the circumferential direction of the receiving groove. The first wall and the second wall are connected by the third wall to form an engaging groove.

4. The dustproof component according to claim 2, characterized in that, The receiving groove further includes a communicating groove that communicates with the engaging groove. The communicating groove extends along the depth direction of the receiving groove. The receiving groove also includes an entry hole that communicates with the outside of the receiving groove along the depth direction. The protrusion enters the engaging groove through the entry hole, or... The receiving groove also includes a detachable cover, which cooperates with the receiving groove to form a limiting platform. The receiving groove also includes a connecting groove that extends along the depth direction of the receiving groove and can accommodate the protrusion.

5. The dustproof component according to claim 4, characterized in that, The protrusion moves between the unlocked position and the locked position. The protrusion, located in the unlocked position, lies within the inlet hole to allow the protective member to separate from the receiving groove. The protrusion, located in the locking position, is in the engagement groove to lock the protective member and the fixing member.

6. The dustproof component according to claim 3, characterized in that, The first wall includes a first inclined surface that faces the engagement groove and extends downward at an incline.

7. The dustproof assembly according to claim 4, characterized in that, The receiving groove further includes a first wall and a second inclined surface, the second inclined surface being located at the bottom of the inlet hole, the second inclined surface facing the first wall and extending upward at an inclination, such that the protrusion in the communicating groove is spaced apart from the first wall along the circumferential direction of the receiving groove.

8. The dustproof component according to claim 1, characterized in that, The protective member is movable between a protective position and a compression position. When the protective member is in the protective position, it is higher than or flush with the receiving opening. When the protective member is in the compression position, it is lower than the receiving opening.

9. The dustproof assembly according to claim 8, characterized in that, The receiving groove includes a connecting engagement groove and a connecting groove, the protective member located in the protective position is located in the engaging groove, and the protective member located in the compressed position is located in the connecting groove.

10. The dustproof assembly according to claim 1, characterized in that, The elastic member includes a first end and a second end. The first end abuts against the protective member, and the second end abuts against the receiving groove. The first end and the second end have different dimensions. When the elastic member is in a compressed state, the first end or the second end is housed in the elastic member.

11. A 3D printer, characterized in that, The 3D printer includes a heated bed, a heated bed lifting assembly, and a dustproof assembly according to any one of claims 1-10. The heated bed lifting assembly adjusts the position of the heated bed along the height direction of the 3D printer. The bottom end of the heated bed lifting assembly is connected to the dustproof assembly. The 3D printer also includes a pulley connected to the fixed member. The heated bed lifting assembly includes a lead screw and an optical shaft. The lead screw is connected to the pulley, and the optical shaft is connected to the receiving groove.

12. The 3D printer according to claim 11, characterized in that, The 3D printer includes at least two heated bed lifting assemblies, including a first heated bed lifting assembly and a second heated bed lifting assembly. The first heated bed lifting assembly is spaced apart from the second heated bed lifting assembly along the depth direction of the 3D printer, and the first heated bed lifting assembly is connected to the dustproof assembly.

13. The 3D printer according to claim 12, characterized in that, The first heated bed lifting assembly includes a first linear bearing, and the second heated bed lifting assembly includes a second linear bearing. There is a height difference between the lower end face of the first linear bearing and the lower end face of the second linear bearing, and / or, The first linear bearing protrudes downward from the second linear bearing along the height direction of the 3D printer.

14. The 3D printer according to claim 13, characterized in that, A portion of the first linear bearing is located in the receiving groove, and the first linear bearing applies a force to the protective member to compress the elastic member.

15. The 3D printer according to claim 14, characterized in that, The 3D printer includes two sets of second heated bed lifting assemblies. The first heated bed lifting assembly also includes a first lead screw and a first optical axis. The axes of the optical axes of the two sets of second heated bed lifting assemblies are all located on a plane that is a first plane. The first lead screw and the first optical axis are arranged in a direction perpendicular to the first plane. The first optical axis is set closer to the heated bed than the first lead screw.

16. The 3D printer according to claim 11, characterized in that, The 3D printer also includes a heated bed and a base plate, with the dustproof assembly detachably connected to the base plate. The edge of the receiving groove of the dustproof assembly is flush with the surface of the base plate facing the heated bed, or the edge of the receiving groove of the dustproof assembly is slightly higher than the surface of the base plate facing the heated bed.

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