Three-dimensional printing construction platform and three-dimensional printing equipment

Abstract

The utility model provides a three-dimensional printing construction platform and three-dimensional printing equipment. The three-dimensional printing construction platform comprises a supporting assembly, a hot bed plate and a construction panel. The construction panel comprises construction parts and a connecting part, the construction parts are used for curing and forming consumables on the construction parts into printed pieces, the construction parts are arranged on one side of the supporting assembly at intervals, the connecting part is connected with the construction parts, and the connecting part is detachably connected with the supporting assembly; the hot bed plate is connected to the supporting assembly and located between the building part and the supporting assembly, and the hot bed plate is configured to heat and bear the building part.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to a three-dimensional printing construction platform and a three-dimensional printing device. Background Art

[0002] The print bed of 3D printing equipment must be heated to a predetermined temperature and maintained at that temperature during printing to prevent warping of printed parts due to varying thermal contraction ratios. This method requires the bed to be continuously heated to maintain this temperature, resulting in excessive energy consumption and increased printing costs. Utility Model Content

[0003] The present application provides a 3D printing construction platform and a 3D printing device to solve the problem in the prior art that the printing hot bed needs to maintain a temperature, resulting in high printing costs.

[0004] In a first aspect, the present application provides a three-dimensional printing construction platform, comprising a support assembly, a heated bed plate, and a construction panel; the construction panel comprises a construction portion and a connecting portion, the construction portion being used for consumables to be solidified and formed into a printed part thereon, the construction portion being arranged at intervals on one side of the support assembly, the connecting portion being connected to the construction portion, and the connecting portion being detachably connected to the support assembly; the heated bed plate being connected to the support assembly and being located between the construction portion and the support assembly, the heated bed plate being configured to heat and support the construction portion.

[0005] In a possible implementation, the building portion is configured to have the same thermal shrinkage ratio as that of the printed part.

[0006] In a possible implementation manner, the connecting portion is disposed around the outer circumference of the building portion, and the connecting portion and the building portion are integrally formed.

[0007] In a possible embodiment, the three-dimensional printing construction platform also includes a first connecting member, a first connecting hole is provided on the connecting portion, and a second connecting hole is provided on the supporting assembly. The first connecting member is at least partially engaged in the first connecting hole and the second connecting hole, and the first connecting member connects the connecting portion and the supporting assembly.

[0008] In a possible embodiment, the first connecting member includes a connecting end and a threaded portion, the connecting end is located on a side of the connecting portion away from the supporting assembly, and the connecting end abuts against the connecting portion;

[0009] One end of the threaded portion is connected to the connecting end portion, and the other end thereof is passed through the first connecting hole. One end of the threaded portion passing through the first connecting hole is threadedly engaged in the second connecting hole.

[0010] In a possible embodiment, a mounting groove is provided on the connecting portion, the mounting groove is arranged around the building portion, and the mounting groove is spaced apart from the building portion;

[0011] The three-dimensional printing construction platform further includes a magnetic component, which is disposed in the mounting groove and is configured to be magnetically connected to the heated bed plate.

[0012] In a possible embodiment, the 3D printing building platform further includes a supporting member, which is rotatably connected to the support assembly, and the supporting member is configured to support the connecting portion to press the building panel onto the hot bed.

[0013] In a possible embodiment, the 3D printing construction platform further includes an elastic member, a slot is provided on a side of the connecting portion away from the supporting assembly, and one end of the abutting member is configured to be retained in the slot;

[0014] One end of the elastic member is elastically connected to the holding member, and the elastic member is configured to apply an elastic force to the holding member, and the elastic force is used to make the holding member clamped at the end of the slot and pressed against the connecting portion.

[0015] In a possible implementation manner, the connecting portion is disposed around an outer circumferential surface of the building portion, and the building portion is detachably connected to the connecting portion.

[0016] In a possible embodiment, the connecting portion includes a first connecting portion and a second connecting portion, wherein the second connecting portion is connected to a side of the first connecting portion away from the supporting assembly;

[0017] The inner circumference of the first connecting part is provided with a first clamping groove, and the inner circumference of the second connecting part is provided with a second clamping groove. The second clamping groove is connected to the first clamping groove and together forms a clamping groove. The construction part is at least partially accommodated in the clamping groove, and the construction part is clamped between the first connecting part and the second connecting part.

[0018] In a possible embodiment, the 3D printing construction platform further includes a second connecting member, the first connecting portion is provided with a first mounting hole, and the second connecting portion is provided with a second mounting hole;

[0019] The second connecting member is passed through the first mounting hole and the second mounting hole, and one end of the second connecting member passing through the first mounting hole and the second mounting hole is connected to the supporting assembly.

[0020] In a second aspect, an embodiment of the present application further provides a three-dimensional printing device, comprising a nozzle assembly and the above-mentioned three-dimensional printing building platform, wherein the nozzle assembly is movably disposed on a side of the building panel away from the hot bed plate.

[0021] The 3D printing construction platform of the present application is characterized by providing a construction section thermally coupled to a heated bed, on which consumables are solidified and formed into printed parts, thereby avoiding the need for continuous heating of the heated bed due to the printed parts being formed directly on the heated bed. The construction section can be made of a suitable material based on the material of the current printed part, so that the construction section can provide a greater adsorption force to the printed part and prevent the printed part from warping. In addition, the construction section is connected to the connecting section, and the connecting section is detachably connected to the support assembly, so that the construction panel can be replaced according to the material of the current printed part, thereby improving the versatility of the 3D printing construction platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the 3D printing construction platform of the present application in one embodiment.

[0023] Figure 2 for Figure 1 A schematic structural diagram of a building panel of a three-dimensional printing building platform in one embodiment.

[0024] Figure 3 This is a schematic structural diagram of another embodiment of the 3D printing construction platform of the present application.

[0025] Figure 4 This is a schematic structural diagram of another embodiment of the 3D printing construction platform of the present application.

[0026] Figure 5 This is a schematic structural diagram of another embodiment of the 3D printing construction platform of the present application.

[0027] Figure 6 for Figure 5 A schematic structural diagram of a building panel of a three-dimensional printing building platform in one embodiment.

[0028] Figure 7 FIG. 1 is a schematic structural diagram of a 3D printing device according to an embodiment of the present application.

[0029] Description of main component symbols:

[0030] 3D printing equipment 200

[0031] 3D Printing Platform 100

[0032] First direction Z

[0033] Second direction X

[0034] The third direction Y

[0035] Nozzle assembly 1

[0036] Rack 2

[0037] First moving component 3

[0038] Second moving component 4

[0039] Support assembly 10

[0040] Base 11

[0041] Support plate 12

[0042] Second connecting hole 120

[0043] first convex portion 121

[0044] Second convex portion 122

[0045] Third convex portion 123

[0046] Hot bed plate 20

[0047] Build Panel 30

[0048] Construction section 31

[0049] Connecting portion 32

[0050] Mounting slot 320

[0051] First District 321

[0052] Second section 322

[0053] First connecting hole 3220

[0054] Card slot 3221

[0055] First connection portion 323

[0056] First mounting hole 3230

[0057] First snap-in slot 3231

[0058] Second connection portion 324

[0059] Second mounting hole 3240

[0060] Second snap-in slot 3241

[0061] Card slot 33

[0062] First connecting member 40

[0063] Connecting end 41

[0064] Threaded portion 42

[0065] Abutment 50

[0066] The first supporting portion 51

[0067] The second abutting portion 52

[0068] The third abutting portion 53

[0069] Shaft 54

[0070] Elastic member 60

[0071] Magnetic parts 70

[0072] Second connecting member 80

[0073] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0074] The following description will refer to the accompanying drawings to more fully describe the contents of this application. Illustrated in the accompanying drawings are exemplary embodiments of the present application. However, the present application can 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 this application thorough and complete and to fully convey the scope of this application to those skilled in the art. Like reference numerals represent identical or similar components.

[0075] The terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. In addition, when used herein, "includes" and / or "comprising" and / or "having" integers, steps, operations, components and / or components do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0076] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in common dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant art and the content of this application, and will not be interpreted as idealized or overly formal meanings.

[0077] The specific implementation methods of the present application will be described in further detail below with reference to the accompanying drawings.

[0078] like Figures 1 to 2As shown, this embodiment provides a 3D printing construction platform 100 , including a support assembly 10 , a heated bed plate 20 , and a construction panel 30 .

[0079] For ease of subsequent reading, this application introduces a first direction Z, a second direction X, and a third direction Y to describe the embodiments of the present application. The first direction Z, the second direction X, and the third direction Y can be three non-parallel linear directions in space; further, the first direction Z, the second direction X, and the third direction Y can be three mutually perpendicular directions in a three-dimensional coordinate system (three-dimensional Cartesian coordinate system). In subsequent embodiments, the first direction Z is the Z-axis direction of the coordinate axis of the three-dimensional coordinate system, the second direction X is the X-axis direction of the coordinate axis of the three-dimensional coordinate system, and the third direction Y is the Y-axis direction of the coordinate axis of the three-dimensional coordinate system.

[0080] The build panel 30 includes a build portion 31 and a connecting portion 32. The build portion 31 is used for curing and molding consumables thereon, and the connecting portion 32 is connected to the build portion 31. Along the first direction Z, the build portion 31 is spaced apart on one side of the support assembly 10, and the connecting portion 32 is detachably connected to the support assembly 10. The heated bed 20 is connected to the support assembly 10 and positioned between the build portion 31 and the support assembly 10. The heated bed 20 is configured to heat and support the build portion 31. A resistance wire can be provided within the heated bed 20, and the heated bed 20 is heated by energizing the resistance wire. Along the first direction Z, the build portion 31 is located on the side of the heated bed 20 away from the support assembly 10. The build portion 31 is thermally coupled to the heated bed 20, allowing the heated bed 20 to transfer heat to the build portion 31, ensuring that the temperature of the consumables does not differ significantly from that of the build portion 31 when the consumables land on the build portion 31.

[0081] In this way, the 3D printing construction platform 100 of the present application, by providing a construction portion 31 thermally coupled to the hot bed 20, and the construction portion 31 is for consumables to be solidified and formed into a printed part, thereby avoiding the printed part being directly formed on the hot bed 20 and the need to continuously heat the hot bed 20. The construction portion 31 can select a suitable material based on the material of the current printed part, so that the construction portion 31 can provide a greater adsorption force to the printed part and avoid the printed part from warping. In addition, the construction portion 31 is connected to the connecting portion 32, and the connecting portion 32 is detachably connected to the support assembly 10, and the construction panel 30 can be replaced according to the material of the current printed part, thereby improving the versatility of the 3D printing construction platform 100.

[0082] Please combine again Figure 1 and Figure 2 In one embodiment, the construction portion 31 is configured to have the same thermal shrinkage ratio as the printed part. In addition, the construction portion 31 is processed into a film-like structure.

[0083] In some embodiments, the build portion 31 is made of the same material as the current print, ensuring that the build portion 31 and the current print have the same thermal shrinkage ratio. Furthermore, the build portion 31 made of the same material also has a strong adsorption force with the print, ensuring that the print adheres to the build portion 31. This eliminates the need for the heated bed 20 to be continuously heated during printing to prevent warping of the print due to the different thermal shrinkage ratios between the heated bed 20 and the print.

[0084] In other embodiments, the material of the construction portion 31 is not limited to the same as the material of the printed part. The construction portion 31 may also be made of a material that is similar to the printed part or other materials that can achieve the same or similar thermal shrinkage ratio between the construction portion 31 and the printed part.

[0085] Please combine again Figure 1 and Figure 2 In one embodiment, the construction portion 31 is a substantially rectangular flat plate structure, and the construction portion 31 is laid on the top surface of the hot bed plate 20 so that the hot bed plate 20 can transfer heat to the construction portion 31 more evenly and quickly.

[0086] The connecting portion 32 is rectangular and matches the shape of the building portion 31. The connecting portion 32 surrounds the outer periphery of the building portion 31 and is integrally formed with the building portion 31. This integral formation of the connecting portion 32 and the building portion 31 eliminates the need for a connecting structure to connect the building portion 31 and the connecting portion 32, thus preventing assembly errors.

[0087] In this embodiment, the connecting portion 32 has an L-shaped cross-section and includes a first portion 321 and a second portion 322. The first portion 321 extends along the first direction Z, with the top end of the first portion 321 connected to the outer circumference of the construction portion 31, and the bottom end of the first portion 321 connected to the second portion 322. The second portion 322 extends from the bottom end of the first portion 321, the surface away from the construction portion 31, toward the side away from the construction portion 31.

[0088] It is understandable that in other embodiments, the cross-sectional shape of the connecting portion 32 may also be other shapes such as a rectangle.

[0089] In this embodiment, the 3D printing construction platform 100 further includes a first connector 40. A first connection hole 3220 is defined in the connection portion 32. A second connection hole 120 is defined in the support assembly 10. The first connector 40 at least partially fits within the first connection hole 3220 and the second connection hole 120, connecting the connection portion 32 and the support assembly 10.

[0090] Specifically, the first connection hole 3220 is provided on the second section 322 and extends through the second section 322 along the first direction Z. The support assembly 10 includes a base 11 and a support plate 12. The support plate 12 is mounted on the top surface of the base 11 along the first direction Z. Furthermore, the heated bed plate 20 is spaced apart from the support plate 12 along the first direction Z, and the heated bed plate 20 and the support plate 12 are connected by fasteners such as bolts. The spacing between the heated bed plate 20 and the support plate 12 prevents direct contact between the heated bed plate 20 and the support plate 12, preventing heat from being transferred to the support plate 12.

[0091] The outer contour of the support plate 12 exceeds the base 11, and the second connection hole 120 is provided in the portion of the support plate 12 that exceeds the base 11. Along the first direction Z, the second connection hole 120 passes through the support plate 12.

[0092] Specifically, there are multiple first connection holes 3220, evenly distributed around the first section 321. Along the second direction X, the first connection holes 3220 on opposite sides of the first section 321 are symmetrically arranged. Along the third direction Y, the first connection holes 3220 on opposite sides of the first section 321 are also symmetrically arranged. Accordingly, the number and position of the second connection holes 120 match those of the first connection holes 3220.

[0093] Furthermore, the first connecting member 40 is a bolt or other element, and includes a connecting end 41 and a threaded portion 42. The outer diameter of the connecting end 41 is larger than the outer diameter of the threaded portion 42. The connecting end 41 is located on a side of the second portion 322 away from the support assembly 10, and the connecting end 41 abuts against the second portion 322.

[0094] The first connection hole 3220 and the second connection hole 120 are both threaded holes. An outer peripheral surface of the threaded portion 42 is provided with external threads, and the threaded portion 42 is threadedly engaged with the first connection hole 3220 and the second connection hole 120 .

[0095] One end of the threaded portion 42 is connected to the connecting end 41, and the other end is inserted into the first connecting hole 3220. The end of the threaded portion 42 that extends out of the first connecting hole 3220 is threadedly engaged with the second connecting hole 120. Thus, when the end of the threaded portion 42 away from the connecting end 41 is locked into the second connecting hole 120, the connecting end 41 presses against the second portion 322, thereby applying pressure in the first direction Z toward the heated bed 20 to the build panel 30 through the first connector 40. This ensures that the build portion 31 is tightly attached to the heated bed 20 and remains taut.

[0096] like Figure 3As shown, in some embodiments, the 3D printing building platform 100 further includes a supporting member 50 , which is rotatably connected to the support assembly 10 , and the supporting member 50 is configured as a supporting connection portion 32 for pressing the building panel 30 onto the hot bed plate 20 .

[0097] Specifically, the abutting member 50 includes a first abutting portion 51, a second abutting portion 52, and a third abutting portion 53. The second abutting portion 52 and the third abutting portion 53 are integrally connected to both ends of the first abutting portion 51. The second abutting portion 52 and the third abutting portion 53 are inclined relative to the first abutting portion 51, and the angle between the second abutting portion 52 and the third abutting portion 53 is acute.

[0098] The support plate 12 has a first protrusion 121 and a second protrusion 122 on one side thereof close to the hot bed 20. The first abutting portion 51 is rotatably mounted on the first protrusion 121 via a rotating shaft 54, the axis of which is parallel to the third direction Y.

[0099] A locking groove 3221 is defined on a side of the second portion 322 away from the supporting assembly 10 , and an end of the second abutting portion 52 away from the first abutting portion 51 is configured to be locked in the locking groove 3221 .

[0100] The 3D printing build platform 100 also includes an elastic member 60, which is a tension spring or other element. One end of the elastic member 60 is elastically connected to the third abutting portion 53, and the other end of the elastic member 60 is elastically connected to the second protrusion 122. The elastic member 60 is configured to apply an elastic force to the abutting member 50. This elastic force is used to force the end of the abutting member 50, which is retained in the slot 3221, against the connecting portion 32. This, in turn, applies pressure along the first direction Z toward the heated bed 20 to the build panel 30 through the abutting member 50, ensuring that the build portion 31 is tightly attached to the heated bed 20 and remains in a taut state.

[0101] In particular, the cross-section of the slot 3221 is an isosceles triangle, so as to ensure that the resisting member 50 is not easily separated from the slot 3221 , and the resisting member 50 can more easily apply pressure to the connecting portion 32 .

[0102] like Figure 4 As shown, in some embodiments, the cross-section of the connecting portion 32 is Z-shaped. The size of the building portion 31 is smaller than that of the heated bed 20 , that is, part of the connecting portion 32 is located above the heated bed 20 in the first direction Z.

[0103] The connecting portion 32 is provided with a mounting groove 320, which is located on the surface of the connecting portion 32 above the heated bed 20 and close to the heated bed 20. The mounting groove 320 surrounds the building portion 31 and is spaced apart from the building portion 31.

[0104] The 3D printing build platform 100 also includes a magnetic component 70, which can be a soft magnetic patch or other component. The magnetic component 70 is disposed within the mounting slot 320 and is configured to magnetically connect to the heated bed 20. The ring-shaped structure of the magnetic component 70 reduces the material used, thereby reducing the cost of the magnetic component 70.

[0105] like Figure 5 and Figure 6 As shown, in some embodiments, the connecting portion 32 is disposed around the outer circumference of the building portion 31 , and the building portion 31 and the connecting portion 32 are detachably connected to facilitate separate replacement of the building portion 31 according to printing requirements.

[0106] The connecting portion 32 includes a first connecting portion 323 and a second connecting portion 324 . The second connecting portion 324 is connected to a side of the first connecting portion 323 away from the supporting assembly 10 .

[0107] The first connecting portion 323 and the second connecting portion 324 have the same shape, both being square. A first engaging groove 3231 is defined on the inner circumference of the first connecting portion 323. The first engaging groove 3231 extends downwardly through the first connecting portion 323 along the first direction Z. A second engaging groove 3241 is defined on the inner circumference of the second connecting portion 324. The second engaging groove 3241 extends upwardly through the second connecting portion 324 along the first direction Z. The second engaging groove 3241 communicates with the first engaging groove 3231 and together form the engaging groove 33. The construction portion 31 is at least partially received within the engaging groove 33 and is clamped between the first and second connecting portions 323, 324, thereby clamping the construction portion 31 together.

[0108] Furthermore, the 3D printing construction platform 100 also includes a second connecting member 80. The first connecting portion 323 is provided with a first mounting hole 3230, which extends through the first connecting portion 323 along the first direction Z. The second connecting portion 324 is provided with a second mounting hole 3240, which extends through the second connecting portion 324 along the first direction Z. Along the first direction Z, the projections of the first mounting hole 3230 and the second mounting hole 3240 on the support plate 12 are both located outside the projections of the first engaging groove 3231 and the second engaging groove 3241 on the support plate 12.

[0109] The second connecting member 80 is inserted through the first mounting hole 3230 and the second mounting hole 3240, and one end of the second connecting member 80 extending through the first mounting hole 3230 and the second mounting hole 3240 is connected to the support assembly 10. The second connecting member 80 is a threaded member such as a bolt, and the first mounting hole 3230 and the second mounting hole 3240 are both threaded holes. The second connecting member 80 is used to lock the first connecting portion 323 and the second connecting portion 324. In addition, the second connecting member 80 can also be used to fix the connecting portion 32 relative to the support plate 12, and the end of the second connecting member 80 can apply a supporting force to the connecting portion 32, thereby pressing the building portion 31 against the surface of the heated bed plate 20.

[0110] Specifically, the top surface of the support plate 12 of the support assembly 10 is provided with a third protrusion 123, and the second connecting member 80 is threadedly connected to the threaded hole defined by the third protrusion 123. It is understood that in other embodiments, the second connecting member 80 can also be directly threadedly connected to the threaded hole defined by the support plate 12.

[0111] like Figure 7 As shown, the embodiment of the present application further provides a 3D printing device 200, comprising a nozzle assembly 1 and the above-mentioned 3D printing building platform 100. The nozzle assembly 1 is movably disposed on a side of the building panel 30 away from the heated bed plate 20. The nozzle assembly 1 can spray molten consumables onto the building portion 31 so that the consumables are solidified and formed on the building portion 31.

[0112] It is understood that the 3D printing device 200 also includes other structures required for 3D printing. For example, the 3D printing device 200 also includes a frame 2, a first movable assembly 3, and a second movable assembly 4. The first movable assembly 3 is mounted on the frame 2 and is configured to drive the nozzle assembly 1 to move along at least one of the first direction Z, the second direction X, and the third direction Y. The second movable assembly 4 is mounted on the frame 2 and is configured to drive the support assembly 10 to move along at least one of the first direction Z, the second direction X, and the third direction Y.

[0113] The specific embodiments of the present application have been described above with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications and substitutions may be made to the specific embodiments of the present application without departing from the scope of the present application. Such modifications and substitutions are within the scope of the present application.

Claims

1. A 3D printing construction platform, characterized in that: include: Support components; A build panel, comprising a build portion and a connecting portion, wherein the build portion is used for consumables to be cured and formed into a printed part, the build portion is spaced apart on one side of the support assembly, and the connecting portion is connected to the build portion, and the connecting portion is detachably connected to the support assembly; A heated bed plate is connected to the support assembly and is located between the building part and the support assembly. The heated bed plate is configured to heat and support the building part.

2. The 3D printing construction platform according to claim 1, wherein: The building portion is configured to have the same thermal shrinkage ratio as the printed part.

3. The 3D printing construction platform according to claim 1, wherein: The connecting portion is arranged around the outer peripheral surface of the building portion, and the connecting portion and the building portion are integrally formed.

4. The 3D printing construction platform according to claim 3, wherein: The three-dimensional printing construction platform also includes a first connecting member, a first connecting hole is provided on the connecting portion, and a second connecting hole is provided on the supporting assembly. The first connecting member is at least partially fitted into the first connecting hole and the second connecting hole, and the first connecting member connects the connecting portion and the supporting assembly.

5. The 3D printing construction platform according to claim 4, wherein: The first connecting member includes a connecting end and a threaded portion, wherein the connecting end is located on a side of the connecting portion away from the supporting assembly, and the connecting end abuts against the connecting portion; One end of the threaded portion is connected to the connecting end portion, and the other end thereof is passed through the first connecting hole. One end of the threaded portion passing through the first connecting hole is threadedly engaged in the second connecting hole.

6. The 3D printing construction platform according to claim 3, wherein: The connecting portion is provided with a mounting groove, the mounting groove is arranged around the building portion, and the mounting groove is spaced apart from the building portion; The three-dimensional printing construction platform further includes a magnetic component, which is disposed in the mounting groove and is configured to be magnetically connected to the heated bed plate.

7. The 3D printing construction platform according to claim 3, wherein: The three-dimensional printing construction platform further includes a supporting member, which is rotatably connected to the support assembly. The supporting member is configured to support the connecting portion to press the construction panel onto the hot bed.

8. The 3D printing construction platform according to claim 7, wherein: The 3D printing construction platform further comprises an elastic member, a slot is provided on a side of the connecting portion away from the supporting assembly, and one end of the abutting member is configured to be retained in the slot; One end of the elastic member is elastically connected to the holding member, and the elastic member is configured to apply an elastic force to the holding member, and the elastic force is used to make the holding member clamped at the end of the slot and pressed against the connecting portion.

9. The 3D printing construction platform according to claim 1, wherein: The connecting portion is arranged around the outer circumference of the building portion, and the building portion is detachably connected to the connecting portion.

10. The 3D printing construction platform according to claim 9, wherein: The connecting portion includes a first connecting portion and a second connecting portion, wherein the second connecting portion is connected to a side of the first connecting portion away from the supporting assembly; The inner circumference of the first connecting part is provided with a first clamping groove, and the inner circumference of the second connecting part is provided with a second clamping groove. The second clamping groove is connected to the first clamping groove and together forms a clamping groove. The construction part is at least partially accommodated in the clamping groove, and the construction part is clamped between the first connecting part and the second connecting part.

11. The 3D printing construction platform according to claim 10, wherein: The 3D printing construction platform further includes a second connecting member, wherein the first connecting portion is provided with a first mounting hole, and the second connecting portion is provided with a second mounting hole; The second connecting member is passed through the first mounting hole and the second mounting hole, and one end of the second connecting member passing through the first mounting hole and the second mounting hole is connected to the supporting assembly.

12. A 3D printing device, characterized in that: The invention comprises a nozzle assembly and a 3D printing construction platform according to any one of claims 1 to 11, wherein the nozzle assembly is movably arranged on a side of the construction panel away from the hot bed plate.

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