Buffering element and stereolithography device applying the same
By designing the first and second buffer structures of the buffer element, the problem of poor buffering performance of the 3D printer was solved, multi-directional shock absorption was achieved, and printing accuracy was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN CREALITY ECOSYSTEM TECHNOLOGY CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-05
Smart Images
Figure CN224323577U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of stereoscopic printing, and more particularly to a buffer element and a stereoscopic printing apparatus using the same. Background Technology
[0002] 3D printing is a rapid prototyping technology that uses digital model files as a basis and employs adhesive materials such as special waxes, powdered metals, or plastics to create three-dimensional objects by printing layers of material. Fused deposition modeling (FDM) is one of the main 3D printing technologies. This technology involves heating and melting a hot-melt filament, extruding it from a nozzle, and depositing it onto a forming platform or a previously cured material layer to ultimately create the physical object.
[0003] 3D printers typically generate mechanical vibration during operation, which affects both user experience and print quality. Therefore, it's necessary to add feet to 3D printers to reduce this vibration. However, commercially available feet often have poor cushioning performance, meaning that even with such feet installed, the 3D printing unit may still wobble, negatively impacting printing accuracy. How to solve these problems is a question that those skilled in the art need to consider. Utility Model Content
[0004] To address the problems in the prior art, embodiments of this application provide a buffer element and a stereoscopic printing apparatus using the same.
[0005] This application provides a buffer element, which includes a first buffer structure and a second buffer structure. The first buffer structure is configured to deform at least along a straight line, defined as a first direction. The second buffer structure is connected to the first buffer structure, and the second buffer structure includes a first protrusion and a second protrusion spaced apart along the first direction. The first protrusion and the second protrusion are movably connected, and the first protrusion is capable of swinging relative to the second protrusion in a direction intersecting the first direction.
[0006] Furthermore, the buffer element provided in this application embodiment is disposed at the bottom of the stereolithography apparatus, improving the shock absorption effect of the stereolithography apparatus and thus improving the printing accuracy of the stereolithography apparatus. Specifically, the first buffer structure can extend and retract along the first direction, at least reducing the vibration along the first direction generated when the nozzle assembly contacts the forming platform; the first protrusion and the second protrusion are connected and spaced apart along the first direction, the first protrusion and the second protrusion are movably connected, and the first protrusion can swing relative to the second protrusion in a direction intersecting the first direction, at least reducing the vibration along that direction generated when the forming platform and / or the nozzle moves. The buffer element provided in this application embodiment can provide buffering in at least multiple directions, improving the shock absorption effect of the stereolithography apparatus and improving the printing accuracy of the stereolithography apparatus.
[0007] In one embodiment, the first buffer structure includes a plurality of serrated portions, which are arranged sequentially along the first direction.
[0008] In one embodiment, the first buffer structure has a cavity extending along the first direction, and a plurality of serrated portions are arranged around the cavity; the tips of the plurality of serrated portions protrude outward away from the cavity.
[0009] In one embodiment, the edge profile of the cavity along the plane parallel to the first direction is wavy.
[0010] In one embodiment, the second buffer structure further includes a connecting portion, which is disposed between the first protrusion and the second protrusion along the first direction and connects the first protrusion and the second protrusion; the outer diameter of the connecting portion is smaller than the outer diameter of the first protrusion or the second protrusion.
[0011] In one embodiment, the first protrusion is connected to the first buffer structure, the connecting portion is disposed along the first direction on the side of the first protrusion away from the first buffer structure, and the second protrusion is disposed along the first direction on the side of the connecting portion away from the first protrusion; the second protrusion is used to contact the bearing surface that carries the buffer element.
[0012] In one embodiment, the second protrusion is used to contact the bearing surface that carries the buffer element, and the second protrusion includes an arcuate bottom surface; the arcuate bottom surface is configured to deform along the first direction.
[0013] In one embodiment, there is a height difference between the central region of the arcuate bottom surface and the outer edge of the arcuate bottom surface along the first direction, the arcuate bottom surface extends smoothly from the central region toward the outer edge, and the position of the central region relative to the outer edge along the first direction is variable.
[0014] In one embodiment, the second buffer structure further includes a third protrusion, which is disposed on the arc-shaped bottom surface. The third protrusion is arranged in a ring shape and protrudes along the first direction toward the side away from the first buffer structure.
[0015] This application also provides a stereolithography apparatus, which includes a main body, a forming platform, a nozzle, and a buffer element as described in any of the foregoing embodiments. The forming platform and the nozzle are respectively connected to the main body. The buffer element is disposed on the side of the main body away from the forming platform along the first direction. The buffer element and the nozzle are located on opposite sides of the forming platform along the first direction.
[0016] Furthermore, the bottom of the stereoscopic printing device provided in this application embodiment is provided with a buffer element, which can improve the shock absorption effect of the stereoscopic printing device, thereby improving the printing accuracy of the stereoscopic printing device. Attached Figure Description
[0017] Figure 1 This is a three-dimensional schematic diagram of the three-dimensional printing apparatus provided in the embodiments of this application.
[0018] Figure 2 This is an exploded perspective view of the stereoscopic printing apparatus provided in the embodiments of this application.
[0019] Figure 3 This is a three-dimensional schematic diagram of a buffer element provided in an embodiment of this application.
[0020] Figure 4 This is a cross-sectional schematic diagram of the buffer element provided in an embodiment of this application.
[0021] Explanation of main component symbols
[0022] 3D printing device 100
[0023] Main body 101
[0024] Molding platform 102
[0025] Nozzle 103
[0026] Gantry Frame 104
[0027] Base 105
[0028] Buffer element 10
[0029] First buffer structure 11
[0030] Cavity 110
[0031] Serrated section 111
[0032] Wave section 112
[0033] Second buffer structure 12
[0034] first convex portion 121
[0035] Second convex portion 122
[0036] 1220 curved bottom
[0037] Central Area 1221
[0038] outer edge 1222
[0039] Cavity 1223
[0040] Third convex portion 123
[0041] Connecting part 124
[0042] Connection structure 13
[0043] Buckle part 130
[0044] Connecting wall 131
[0045] 132
[0046] Third direction X
[0047] Second direction Y
[0048] First direction Z
[0049] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation
[0050] The following description will be given with reference to the accompanying drawings for a more complete description of the present application. The drawings illustrate exemplary embodiments of the present application. However, the present application may be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to limit the present application. As used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context clearly indicates otherwise. Furthermore, when used herein, “comprising” and / or “including” and / or “having,” integers, steps, operations, components, and / or components, but without excluding the presence or addition of one or more other features, regions, integers, steps, operations, components, and / or groups thereof. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Furthermore, unless explicitly defined herein, terms such as those defined in a general dictionary should be interpreted as having the same meaning as they have in the relevant technology and in the content of this application, and should not be interpreted as having an idealized or overly formal meaning.
[0051] Typically, 3D printers generate mechanical vibration during operation, which affects both user experience and print quality. Therefore, it's necessary to add feet to 3D printers to reduce this vibration. However, commercially available feet often suffer from poor cushioning and insecure installation, leaving the 3D printing unit potentially prone to wobbling, negatively impacting printing accuracy. Solving these problems is a challenge that those skilled in the art need to address.
[0052] Correspondingly, this application provides a buffer element and a stereolithography apparatus using the same. The stereolithography apparatus includes a forming platform and a nozzle disposed on a main body. The forming platform has a heated bed plane extending along a third direction and a second direction. The nozzle is movably disposed relative to the heated bed plane along a first direction. The buffer element is disposed along the first direction on a side of the main body away from the forming platform. The buffer element and the nozzle are located on opposite sides of the forming platform along the first direction. The buffer element includes a first buffer structure and a second buffer structure. The first buffer structure is configured to deform at least along the first direction. The second buffer structure is connected to the first buffer structure and includes a first protrusion and a second protrusion spaced apart along the first direction. The first protrusion and the second protrusion are movably connected, and the first protrusion is oscillating relative to the second protrusion along a third direction or a second direction.
[0053] Furthermore, the buffer element provided in this application embodiment, disposed at the bottom of the stereolithography apparatus, enhances the shock absorption effect of the stereolithography apparatus, thereby improving the printing accuracy of the stereolithography apparatus. Specifically, the first buffer structure is extendable and retractable along the first direction, which can at least reduce the vibration along the first direction generated when the nozzle assembly contacts the forming platform; the first protrusion and the second protrusion are connected and spaced apart along the first direction, the first protrusion and the second protrusion are movably connected, and the first protrusion can swing relative to the second protrusion in a direction intersecting the first direction, which can at least reduce the vibration along that direction generated when the forming platform and / or the nozzle moves. The buffer element provided in this application embodiment can provide buffering in at least multiple directions, improving the shock absorption effect of the stereolithography apparatus and improving the printing accuracy of the stereolithography apparatus.
[0054] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments. It should be noted that components depicted in the drawings are not necessarily shown to scale; and identical or similar components will be designated with the same or similar reference numerals or similar technical terms.
[0055] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0056] like Figure 1 and Figure 2 As shown in the illustration, this application also provides a stereolithography apparatus 100, which includes a main body 101, a forming platform 102, a nozzle 103, and a buffer element 10. The forming platform 102 and the nozzle 103 are respectively connected to the main body 101. The forming platform 102 has a heated bed plane extending along a third direction X and a second direction Y. The nozzle 103 is movably disposed relative to the heated bed plane along a first direction Z. The buffer element 10 is disposed along the first direction Z on the side of the main body 101 opposite to the forming platform 102. The buffer element 10 and the nozzle 103 are located on opposite sides of the forming platform 102 along the first direction Z.
[0057] In one embodiment, the main body 101 may include a connected gantry 104 and a base 105. A buffer element 10 is disposed at the lower part of the base 105 along a first direction Z, and the base 105 contacts the bearing surface through the buffer element 10. A forming platform 102 is disposed at the upper part of the base 105 along the first direction Z, and a nozzle 103 is connected to the gantry 104 and suspended above the forming platform 102 along the first direction Z. The main body 101 may also include a plurality of drive components (not shown), which can be used to drive the forming platform 102 and / or the nozzle 103 to move along at least one of the third direction X, the second direction Y, and the first direction Z, for realizing stereoscopic printing.
[0058] In this embodiment, the number of buffer elements 10 can be multiple, such as three (arranged in a triangle at the bottom of the base 105), four (spaced at the four corners of the base 105), six, eight, or other numbers, which will not be elaborated here. Multiple buffer elements 10 are spaced apart at the bottom of the base 105 to enhance the shock absorption effect.
[0059] It is understood that the bottom of the stereoscopic printing device 100 provided in this application embodiment is provided with a buffer element 10, which can improve the shock absorption effect of the stereoscopic printing device 100, thereby improving the printing accuracy of the stereoscopic printing device 100.
[0060] Understandably, the buffer element 10 can be made of a flexible buffer material, such as silicone or rubber, which has a certain deformation capacity, to absorb mechanical vibration and achieve shock absorption; in particular, a soft silicone material can be used, and furthermore, the buffer element 10 can be integrally injection molded from silicone. Those skilled in the art will understand that the buffer element 10 can also be made of other materials and by other suitable processes, which will not be elaborated here.
[0061] Furthermore, the first direction Z, the second direction Y, and the third direction X can be three non-parallel straight lines in space; furthermore, the third direction X, the second direction Y, and the first direction Z can be three mutually perpendicular directions in a three-dimensional coordinate system (a three-dimensional Cartesian coordinate system). In subsequent embodiments, the third direction X is described as the X-axis direction of the three-dimensional coordinate system, the second direction Y is the Y-axis direction of the three-dimensional coordinate system, and the first direction Z is the Z-axis direction of the three-dimensional coordinate system.
[0062] Further integration Figure 3 and Figure 4As shown, this application embodiment provides a buffer element 10, which includes a connecting structure 13, a first buffer structure 11, and a second buffer structure 12. The first buffer structure 11 is connected to the connecting structure 13, and the second buffer structure 12 is connected to the first buffer structure 11. When the buffer element 10 is assembled in the stereoscopic printing device 100 and is in use, the connecting structure 13, the first buffer structure 11, and the third buffer structure are arranged sequentially along the first direction Z. The connecting structure 13 is connected to the main body 101, and the second buffer structure 12 is used to abut against the bearing surface (e.g., the ground or a tabletop) that supports the stereoscopic printing device 100.
[0063] In one embodiment, the first buffer structure 11 is configured to extend and retract along a first direction Z to achieve shock absorption; the second buffer structure 12 is connected to the first buffer structure 11, and the second buffer structure 12 includes a first protrusion 121 and a second protrusion 122 spaced along the first direction Z, the first protrusion 121 is connected to the second protrusion 122, and the first protrusion 121 is able to swing relative to the second protrusion 122 at least along the plane containing the third direction X and the second direction Y to achieve shock absorption.
[0064] It is understood that the buffer element 10 provided in this application embodiment is disposed at the bottom of the stereoscopic printing device 100 to improve the shock absorption effect of the stereoscopic printing device 100, thereby improving the printing accuracy of the stereoscopic printing device 100.
[0065] Specifically, the first buffer structure 11 can extend and retract along the first direction Z, which can at least reduce the vibration along the first direction Z generated when the nozzle 103 assembly contacts the molding platform 102.
[0066] Specifically, the damping principle of the second buffer structure 12 is roughly as follows: when the stereolithography device 100 tends to sway in a planar direction (e.g., along the plane containing the third direction X and the second direction Y) or when swaying occurs, the first protrusion 121 is driven to sway along in that planar direction and absorbs vibration energy. Simultaneously, the gap between the first protrusion 121 and the second protrusion 122 prevents the vibration of the stereolithography device 100 from being transmitted to its support (e.g., a table), thus reducing the vibration of the support. Ideally, the second protrusion 122, due to the presence of the connecting portion 124, should not sway. The second buffer structure 12 can at least mitigate the vibration along the direction generated when the forming platform 102 and / or the nozzle 103 move along the third direction X or the second direction Y.
[0067] That is, the buffer element 10 applied to the stereo printing device 100 can provide buffering at least along the intersecting third direction X, the second direction Y, and the first direction Z, thereby improving the shock absorption effect of the stereo printing device 100 and improving the printing accuracy of the stereo printing device 100.
[0068] In one embodiment, the connecting structure 13 is connected to the first buffer structure 11 and is located on the side of the first buffer structure 11 away from the second buffer structure 12 along the first direction Z. The connecting structure 13 is used to connect the main body 101. The connecting structure 13 includes a snap-fit portion 130 and / or an adhesive portion (not shown) for snapping or adhesively attaching to the main body 101.
[0069] In this embodiment, the connecting structure 13 includes a plurality of latching portions 130, which are spaced apart. Each latching portion 130 includes a connecting wall 131 and a latching tongue 132. The connecting wall 131 is connected to the first buffer structure 11, and the latching tongue 132 is connected to the connecting wall 131 and located on the side of the connecting wall 131 away from the first buffer structure 11. The side of the latching tongue 132 away from the first buffer structure 11 is provided with a guide surface for guiding the latching portion 130 to deform inward so that the latching tongue 132 can extend into the connecting hole of the main body portion 101; the elastic latching portion 130 will subsequently spring back and engage with the first buffer structure 11.
[0070] When the buffer element 10 is assembled into the stereolithography device 100 and is in use, the connecting wall 131 extends approximately along the first direction Z, and the latch 132 is located on the outside of the connecting wall 131 and protrudes outward approximately in a direction perpendicular to the first direction Z.
[0071] In other embodiments, the adhesive portion can be a connecting mechanism with an adhesive surface, which connects the connecting mechanism to the main body 101 by adhesive force. Those skilled in the art will understand that this is certainly achievable, and will not be elaborated here.
[0072] In one embodiment, the first buffer structure 11 is generally hollow cylindrical, and its solid area has wavy and / or sawtooth textures. When the buffer element 10 is assembled in the stereolithography device 100 and is in use, the wavy or sawtooth textures are arranged along the first direction Z, so that the first buffer structure 11 can stretch and contract along the first direction Z.
[0073] In this embodiment, the first buffer structure 11 includes a plurality of serrated portions 111. When the buffer element 10 is assembled on the stereoscopic printing device 100 and is in use, the plurality of serrated portions 111 are arranged sequentially along the first direction Z.
[0074] In this embodiment, the first buffer structure 11 further includes a plurality of wave sections 112. When the buffer element 10 is assembled on the stereoscopic printing device 100 and is in use, the plurality of wave sections 112 are arranged sequentially along the first direction Z.
[0075] In one embodiment, the first buffer structure 11 has a cavity 110 extending along a first direction Z, and a plurality of serrated portions 111 are arranged around the cavity 110. The tips of the plurality of serrated portions 111 protrude outward away from the cavity 110, and the protruding ends of the plurality of wavy portions 112 protrude inward towards the cavity 110.
[0076] In this embodiment, a plurality of serrated portions 111 are disposed on the outer peripheral surface of the first buffer structure 11, and a plurality of wave portions 112 are disposed on the inner peripheral surface of the first buffer structure 11. One serrated portion 111 is configured to correspond to the gap between two adjacent wave portions 112, and one wave portion 112 is configured to correspond to the gap between two adjacent serrated portions 111.
[0077] Understandably, the first buffer structure 11 bends or is compressed and deformed under pressure, which can absorb the vibration in the first direction Z when the 3D printer moves, and at the same time reduce vibration noise.
[0078] In one embodiment, the edge profile of the cavity 110 along the plane parallel to the first direction Z is wavy.
[0079] Understandably, the wavy edge profile of the cavity 110 has a better buffering effect. The first buffer structure 11 has more deformation space when under pressure, resulting in better shock absorption and reduced vibration noise.
[0080] In one embodiment, the first protrusion 121 and the second protrusion 122 are generally plate-shaped. When the buffer element 10 is assembled into the stereolithography apparatus 100 and is in use, the thickness direction of the first protrusion 121 and the second protrusion 122 is generally along the first direction Z, and there is also a gap between the first protrusion 121 and the second protrusion 122 along the first direction Z; the outer diameter of the first protrusion 121 and the second protrusion 122 along the plane perpendicular to the first direction Z is larger than the outer diameter of the first buffer structure 11.
[0081] In one embodiment, the second buffer structure 12 further includes a connecting portion 124, which is disposed along the first direction Z between the first protrusion 121 and the second protrusion 122 and connects the first protrusion 121 and the second protrusion 122.
[0082] In this embodiment, the outer diameter of the connecting portion 124 along the third direction X and the second direction Y is smaller than the outer diameter of the first protrusion 121 or the second protrusion 122 along the third direction X and the second direction Y.
[0083] In one embodiment, the first protrusion 121 is connected to the first buffer structure 11 via a connecting portion 124. The connecting portion 124 is disposed along the first direction Z on the side of the first protrusion 121 away from the first buffer structure 11, and the second protrusion 122 is disposed along the first direction Z on the side of the connecting portion 124 away from the first protrusion 121. The second protrusion 122 is used to contact the bearing surface of the bearing buffer element 10.
[0084] Understandably, the connecting portion 124 has a smaller radial width in the direction perpendicular to the first direction Z (including at least the X direction and / or Y direction) compared to the first protrusion 121 and the second protrusion 122. There is a gap between the first protrusion 121 and the second protrusion 122, so that the first protrusion 121 forms a cantilever-like structure, which allows the connected main body 101 to sway slightly in the planar direction (the plane defined by the third direction X and the second direction Y) to achieve vibration reduction.
[0085] In one embodiment, the second protrusion 122 includes an arcuate bottom surface 1220 for contacting the bearing surface. The arcuate bottom surface 1220 is configured to deform along a first direction Z and to generate a vacuum negative pressure between the arcuate bottom surface 1220 and the bearing surface.
[0086] In this embodiment, when the buffer element 10 is assembled on the stereoscopic printing device 100 and is in use, the arc-shaped bottom surface 1220 is located along the first direction Z on the side of the second buffer structure 12 away from the first buffer structure 11 and facing the bearing surface.
[0087] Understandably, when the buffer element 10 contacts the bearing surface, the arc-shaped bottom surface 1220 contacts the bearing surface and forms a cavity 1223. The gravity of the stereolithography device 100 is applied to the buffer element 10, and the buffer element 10 is compressed along the first direction Z. The cavity 110 is squeezed and some of the gas in it is discharged, thereby generating a vacuum negative pressure and a certain adsorption force between the arc-shaped bottom surface 1220 and the bearing surface, and the buffer element 10 is more firmly connected to the bearing surface.
[0088] In one embodiment, there is a height difference between the central region 1221 of the arc-shaped bottom surface 1220 and the outer edge 1222 of the arc-shaped bottom surface 1220 along the first direction Z. The arc-shaped bottom surface 1220 extends smoothly from the central region 1221 to the outer edge 1222, and the position of the central region 1221 relative to the outer edge 1222 along the first direction Z is variable.
[0089] In this embodiment, the projection of the arc-shaped bottom surface 1220 along the first direction Z is approximately circular; in a naturally extended state, the curvature of the arc-shaped bottom surface 1220 gradually changes from the central region 1221 toward the outer edge 1222.
[0090] In this embodiment, the edge of the projection of the arc-shaped bottom surface 1220 corresponds to the outer edge 1222, and the middle part of the projection of the arc-shaped bottom surface 1220 corresponds to the central region 1221. The projection of the first buffer structure 11 along the first direction Z at least partially overlaps with the projection of the central region 1221 along the first direction Z, and the projection of the first buffer structure 11 along the first direction Z does not overlap with the projection of the outer edge 1222.
[0091] Understandably, when the second buffer structure 12 is compressed, it will deform. The second buffer structure 12 as a whole is pressed down, and the central region 1221, which was originally separated from the bearing surface, gradually moves closer to the bearing surface along the first direction Z, while generating an adsorption force.
[0092] In one embodiment, the second buffer structure 12 further includes a third protrusion 123, which is disposed on the arc-shaped bottom surface 1220. The third protrusion 123 is arranged in a ring shape and protrudes along the first direction Z toward the side away from the first buffer structure 11.
[0093] In this embodiment, the third protrusion 123 is generally annular and is disposed around the central region 1221.
[0094] In this embodiment, the second buffer structure 12 includes a plurality of third protrusions 123, which are configured as concentric rings surrounding the central region 1221.
[0095] Understandably, by setting the third protrusion 123, the suction strength of the bottom of the second buffer structure 12 and its adaptability to different bearing surfaces can be enhanced. For example, when the bearing surface is not an absolutely flat surface (such as an uneven tabletop), the annular third protrusion 123 can help the second buffer structure 12 to better adhere to the bearing surface and improve reliability.
[0096] The specific embodiments of this application have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that various changes and substitutions can be made to the specific embodiments of this application without departing from the spirit and scope of this application. All such changes and substitutions fall within the scope defined by this application.
Claims
1. A buffer element, characterized in that, The buffer element includes: The first buffer structure is constructed to be able to deform at least along a straight line direction, which is defined as the first direction. A second buffer structure is connected to the first buffer structure. The second buffer structure includes a first protrusion and a second protrusion spaced apart along the first direction. The first protrusion and the second protrusion are movably connected, and the first protrusion can swing relative to the second protrusion in a direction intersecting the first direction.
2. The buffer element as described in claim 1, characterized in that, The first buffer structure includes multiple serrated portions, which are arranged sequentially along the first direction.
3. The buffer element as described in claim 2, characterized in that, The first buffer structure has a cavity extending along the first direction, and a plurality of serrated portions are arranged around the cavity; the tips of the plurality of serrated portions protrude outward away from the cavity.
4. The buffer element as described in claim 3, characterized in that, The edge profile of the cavity along the plane parallel to the first direction has a wavy shape.
5. The buffer element as claimed in claim 1, characterized in that, The second buffer structure further includes a connecting portion, which is disposed between the first protrusion and the second protrusion along the first direction and connects the first protrusion and the second protrusion; the outer diameter of the connecting portion is smaller than the outer diameter of the first protrusion or the second protrusion.
6. The buffer element as described in claim 5, characterized in that, The first protrusion is connected to the first buffer structure, and the connecting portion is disposed along the first direction on the side of the first protrusion away from the first buffer structure. The second protrusion is disposed along the first direction on the side of the connecting portion away from the first protrusion. The second protrusion is used to contact the bearing surface that carries the buffer element.
7. The buffer element as claimed in claim 1, characterized in that, The second protrusion is used to contact the bearing surface that carries the buffer element, and the second protrusion includes an arc-shaped bottom surface; the arc-shaped bottom surface is configured to deform along the first direction.
8. The buffer element as claimed in claim 7, characterized in that, There is a height difference between the central region of the arc-shaped bottom surface and the outer edge of the arc-shaped bottom surface along the first direction. The arc-shaped bottom surface extends smoothly from the central region toward the outer edge, and the position of the central region relative to the outer edge along the first direction is variable.
9. The buffer element as claimed in claim 7, characterized in that, The second buffer structure further includes a third protrusion, which is disposed on the arc-shaped bottom surface. The third protrusion is arranged in a ring shape and protrudes along the first direction toward the side away from the first buffer structure.
10. A stereoscopic printing device, characterized in that, It includes a main body, a forming platform, a nozzle, and a buffer element as described in any one of claims 1 to 9. The forming platform and the nozzle are respectively connected to the main body. The buffer element is disposed on the side of the main body away from the forming platform along the first direction. The buffer element and the nozzle are located on opposite sides of the forming platform along the first direction.