Heated seat assembly, printhead, and three-dimensional printer

Abstract

The application relates to the field of three-dimensional printing, aims to solve the problem that a three-dimensional printer in some known technologies is inconvenient to disassemble a hot end device, and provides a heating seat assembly, a printing head and a three-dimensional printer. The heating seat assembly comprises a heating seat, a locking structure, a limiting piece and a hot end device. The locking structure is fixed to the heating seat. The limiting piece is movably arranged on the heating seat, and the limiting piece and the locking structure can selectively contact or separate. The hot end device comprises a heat dissipation piece, a heat conduction piece, a throat pipe and a nozzle. The heat conduction piece is arranged in space with the heat dissipation piece. One part of the throat pipe is in contact with the heat conduction piece, and the other part of the throat pipe is in contact with the heat dissipation piece. The nozzle is connected with the heat conduction piece, the nozzle is communicated with the throat pipe, and at least part of the hot end device is movably arranged between the heating seat and the limiting piece. The application has the beneficial effect that the hot end device is convenient to disassemble.

Description

Technical Field

[0001] This application relates to the field of 3D printing, and more specifically, to a heated base assembly, a print head, and a 3D printer. Background Technology

[0002] A 3D printer (also known as a stereo printer or three-dimensional printer) is a rapid prototyping process. Currently, the most common 3D printing technology used is fused deposition modeling (FDM). FDM is a technology that constructs three-dimensional objects by printing layer by layer using powdered materials such as metal or plastic based on digital models. Specifically, in an FDM 3D printer, a feeding mechanism provides molten filament material to the hot-end device. The molten filament is heated to a molten state within the hot-end device. The hot-end device then extrudes the molten material onto the forming platform as it moves along the printing path, printing the three-dimensional object layer by layer.

[0003] In the process of developing this application, the inventors discovered that at least the following problems exist in the known technologies: some known 3D printers have the problem of inconvenient disassembly of the hot end device. Utility Model Content

[0004] This application provides a heating mount assembly, a print head, and a 3D printer to solve the problem of inconvenient disassembly of the hot end device in some known 3D printers.

[0005] In a first aspect, embodiments of this application provide a heating seat assembly, which includes a heating seat, a locking structure, a limiting member, and a hot-end device. The locking structure is fixed to the heating seat. The limiting member is movably disposed on the heating seat, and the limiting member and the locking structure can selectively contact or separate. The hot-end device includes a heat dissipation member, a heat conduction member, a throat, and a nozzle. The heat conduction member and the heat dissipation member are spaced apart. A portion of the throat contacts the heat conduction member, and another portion of the throat contacts the heat dissipation member. The nozzle is connected to the heat conduction member and communicates with the throat. At least a portion of the hot-end device is detachably disposed between the heating seat and the limiting member.

[0006] In one possible implementation, the heating seat is provided with at least one rotatable fitting hole; the limiting member includes a rotating shaft section that is rotatably fitted into at least one rotatable fitting hole, and the rotating shaft section can selectively contact or separate from the hot end device.

[0007] In one possible implementation, the heating seat includes a heating seat body and a first hook-shaped portion and a second hook-shaped portion protruding from the heating seat body. The first hook-shaped portion and the second hook-shaped portion are spaced apart, and the first hook-shaped portion and the second hook-shaped portion are respectively provided with a rotating engagement hole.

[0008] In one possible implementation, at least one rotating fitting hole includes a first rotating fitting hole and a second rotating fitting hole; the rotating shaft section includes a first shaft section, a limiting section and a second shaft section connected in sequence, the first shaft section is rotatably fitted into the first rotating fitting hole, the second shaft section is rotatably fitted into the second rotating fitting hole, and the limiting section can selectively contact or separate from the hot end device.

[0009] In one possible implementation, the rotation axis of the limiting segment does not coincide with that of the first shaft segment, and / or the rotation axis of the limiting segment does not coincide with that of the second shaft segment; the heat-conducting component is provided with a limiting groove, and the limiting segment and the groove wall of the limiting groove can selectively contact or separate.

[0010] In one possible implementation, the limiting member further includes a locking section connected to the rotating shaft section; the locking structure includes a mating protrusion protruding from the heating seat, and the locking section and the mating protrusion can selectively contact or separate.

[0011] In one possible implementation, a locking groove is provided in conjunction with the protrusion, and the groove wall of the locking groove can selectively contact or separate from the locking section.

[0012] Secondly, embodiments of this application provide a printhead, which includes a printhead body and a heating seat assembly. The heating seat assembly includes a heating seat, a locking structure, a limiting member, and a hot-end device. The heating seat is fixed to the printhead body, the limiting member is movably disposed on the heating seat, the locking structure is fixed to the heating seat, and the locking structure is used to restrict the movement of the limiting member. The hot-end device includes a heat dissipation member, a heat conduction member, a throat, and a nozzle. The heat conduction member and the heat dissipation member are spaced apart, the throat connects the heat conduction member and the heat dissipation member, the nozzle is connected to the heat conduction member, and the nozzle communicates with the throat. At least a portion of the hot-end device is detachably disposed between the heating seat and the limiting member.

[0013] In one possible implementation, one end of the limiting member is rotatably and slidably disposed on the heating base. The limiting member has a first sliding position and a second sliding position. When the limiting member is in the first sliding position, the locking structure restricts the rotation of the limiting member. When the limiting member is in the second sliding position, the locking structure releases the rotation of the limiting member.

[0014] In one possible implementation, one end of the limiting member is provided with a first opening; the heating seat includes a heating seat body and a first extension, the first extension protrudes from the heating seat body, the first extension is at least partially located in the first opening, and the limiting member and the first extension are slidably connected through the first opening.

[0015] In one possible implementation, the heating base further includes a first shaft portion connected to one end of the first extension portion away from the heating base body, and one end of the limiting member is rotatably connected to the first shaft portion.

[0016] In one possible implementation, both ends of the first shaft portion extend beyond the first extension portion.

[0017] In one possible implementation, the locking structure includes a second extension and a second shaft. The second extension protrudes from the heating base body, and the second shaft is connected to one end of the second extension away from the heating base body. One or both ends of the second shaft extend beyond the second extension. A limiting hole is provided at the other end of the limiting member, and the second extension and the second shaft limit the rotation of the limiting member through the limiting hole.

[0018] In one possible implementation, the limiting hole includes a first hole segment and a second hole segment that are connected, and the length of the first hole segment is less than the length of the second shaft portion, and the length of the second shaft portion is less than or equal to the length of the second hole segment.

[0019] Thirdly, embodiments of this application provide a 3D printer, which includes a forming platform and a print head. The print head includes a print head body and a heating seat assembly. The print head body is movable relative to the forming platform. The heating seat assembly includes a heating seat, a locking structure, a limiting member, and a hot end device. The heating seat is fixed to the print head body. The locking structure protrudes and is fixed to the heating seat. The limiting member is at least rotatably disposed on the heating seat. The limiting member and the locking structure can selectively contact or separate. The hot end device includes a heat dissipation member, a heat conduction member, a throat, and a nozzle. In the extending direction of the throat, the heat conduction member and the heat dissipation member are spaced apart, and the heat conduction member contacts the throat. The heat dissipation member contacts the throat. The nozzle is connected to the heat conduction member and communicates with the throat. At least a portion of the hot end device is detachably disposed between the heating seat and the limiting member.

[0020] In one possible implementation, the heating seat defines a receiving groove having a second opening, the heat-conducting element being at least partially detachably disposed in the receiving groove; and the limiting element includes a pivot section, the pivot section including a limiting section at least partially located in the second opening, and the distance between the limiting section and the bottom of the receiving groove is adjustable.

[0021] In one possible implementation, the limiting member further includes a locking segment, which is bent and connected to the pivot segment, and the locking segment can selectively contact or separate from the locking structure.

[0022] In one possible implementation, the locking structure includes a mating protrusion having a locking groove, and the locking segment being movable to be located within or outside the locking groove.

[0023] In one possible implementation, the heating seat includes a heating seat body, a first extension and a first shaft. The first extension protrudes from the heating seat body, the first shaft is connected to the end of the first extension away from the heating seat body, one end of a limiting member is rotatably connected to the first shaft, and the limiting member is slidably connected to the first extension.

[0024] In one possible implementation, the locking structure includes a second extension and a second shaft. The second extension protrudes from the heating base body, and the second shaft is connected to the end of the second extension away from the heating base body. The second shaft is larger than the second extension, and the second extension and the second shaft can selectively contact or separate from the other end of the limiting member.

[0025] One of the above technical solutions has the following advantages or beneficial effects: the heating seat assembly, print head and 3D printer in the embodiments of this application can be easily disassembled and assembled by the movement or rotation of the limiting member. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a 3D printer according to an embodiment of this application.

[0028] Figure 2 for Figure 1 A cross-sectional view of the printhead.

[0029] Figure 3 This is a perspective view of a heating seat assembly according to an embodiment of this application.

[0030] Figure 4 for Figure 3 Exploded view of the heating seat assembly.

[0031] Figure 5 for Figure 4 A cross-sectional view of the hot end device.

[0032] Figure 6 for Figure 3 A sectional view of part of the structure.

[0033] Figure 7 for Figure 3 An exploded view from another perspective.

[0034] Figure 8 for Figure 3 A sectional view.

[0035] Figure 9 This is a perspective view of another heating seat assembly according to an embodiment of this application.

[0036] Figure 10 for Figure 9 Exploded view of the heating seat assembly.

[0037] Figure 11 for Figure 9 A schematic diagram of the heating seat assembly during the disassembly of the hot end device.

[0038] Figure 12 for Figure 9 A sectional view.

[0039] Key component symbols: 500 - 3D printer; 510 - Molding platform; 520 - Frame; 521 - Base; 522 - Gantry; 522a - Column; 522b - Crossbeam; 530 - Optical axis; 300 - Print head; 310 - Print head body; 311 - Substrate; 312 - Front shell; 320 - Extrusion assembly; 321 - Active extrusion wheel; 322 - Driven extrusion wheel; T1 - Material channel; 700 - Material ; 100, 100a - Heating base assembly; 10, 10a - Heating base; K3 - Rotational fitting hole; 11 - Heating base body; P2 - Front surface; 12 - First hook-shaped part; 13 - Second hook-shaped part; K31 - First rotational fitting hole; K32 - Second rotational fitting hole; 14 - First extension; 15 - First shaft part; K4 - Second opening; C3 - Receiving groove; Q1 - Mounting space; K6 - Through hole; P5 - Outer surface; P 6-Bottom surface; 20, 20a-Locking structure; 21-Matching protrusion; C1-Locking groove; P1-Guide slope; 22-Second extension; 23-Second shaft; 30, 30a-Limiting member; 31-Rotating shaft section; 31a-First shaft section; 31b-Limiting section; 31c-Second shaft section; 32-Locking section; 33-Connecting section; 34-Handle section; 35-Handle portion; K1-First opening; W1-First sliding position; W 2-Second sliding position; K2-Restriction hole; K21-First hole section; K22-Second hole section; 40, 40a-Hot end device; 41-Heat dissipation component; K5-Through hole; 42-Heat conduction component; 42a-Positioning protrusion; C2-Limiting groove; P3-Side groove surface; P4-Bottom groove surface; 43-Throat tube; 44-Nozzle; 45-Outer sleeve; A1-First arrow; A2-Second arrow; 51-Heating element; 52-Temperature detection element. Detailed Implementation

[0040] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0041] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0044] Example See Figure 1 This embodiment also provides a 3D printer 500, which can specifically be a 3D printer 500 based on FDM technology.

[0045] The 3D printer 500 includes a frame 520, a forming platform 510, a print head 300, and displacement components in the X, Y, and Z directions. The X direction can be a horizontal direction, the Y direction can be a horizontal forward-backward direction, and the Z direction can be a vertical direction or a vertical direction.

[0046] The printhead 300 and the forming platform 510 move relative to each other in a controlled manner under the drive of the displacement components. For example, the forming platform 510 can be displaced relative to the frame 520 in the Y direction under the drive of the Y-direction displacement component, and the printhead 300 can be displaced in the X and / or Z directions under the drive of the X-direction displacement components and the Z-direction displacement components, heating and melting the consumables according to a set path, and printing them onto the forming platform 510 to form a printed part. The X, Y, and Z-direction displacement components can be driven by lead screws and nuts, belts, or other mechanisms, and are not limited here.

[0047] In this embodiment, optionally, the frame 520 includes a base 521 and a gantry 522, with the gantry 522 connected to the base 521. The forming platform 510 is movably disposed on the base 521 along the Y-direction. The gantry 522 includes two columns 522a spaced apart along the X-direction and a crossbeam 522b connected to the ends of the two columns 522a away from the base 521, wherein the columns 522a extend along the Z-direction. The crossbeam 522b and the columns 522a can be integrally formed or are separate structures connected by bolts or other connecting components. An optical axis 530 movable along the Z-direction is connected between the two columns 522a, and the print head 300 is movably disposed on the optical axis 530 along the X-direction. Thus, the print head 300 can be displaced along the X-direction on the optical axis 530, and / or displaced along the Z-direction together with the optical axis 530.

[0048] In other embodiments, the rack 520 may also take other forms of structure, which are not limited here.

[0049] In other embodiments, the movement of the print head 300 and the forming platform 510 can also take other forms. For example, the forming platform 510 may remain stationary, while the print head 300 may be displaced relative to the forming platform 510 along the X, Y, and Z directions, respectively. Alternatively, the forming platform 510 may be displaced along the X and Y directions, while the print head 300 may be displaced along the Z direction.

[0050] In some embodiments, the 3D printer 500 may further include a housing that defines a receiving cavity in which the print head 300 and the forming platform 510 are both disposed. The housing separates the internal and external spaces of the 3D printer 500 to ensure a stable printing environment. A door that can be opened or closed may be provided on the housing to facilitate the removal of the printed parts.

[0051] See Figure 1 and Figure 2 (in, Figure 2 (The limiting member 30, locking structure 20, and outer sleeve 45 are not shown.) In this embodiment, the printhead 300 includes a printhead body 310 and a heating seat assembly 100.

[0052] The printhead body 310 is movable relative to the forming platform 510. For example, the printhead body 310 is slidably disposed on the optical axis 530 along the X direction, so that the printhead body 310 can move along the X direction relative to the optical axis 530, or move along the Z direction together with the optical axis 530. The forming platform 510 is slidably disposed along the Y direction. Thus, the printhead body 310 and the forming platform 510 are movable relative to each other.

[0053] Optionally, the printhead body 310 may include a substrate 311 and a front shell 312. The substrate 311 is slidably connected to the optical axis 530, the front shell 312 is connected to the substrate 311, and the heating seat assembly 100 is installed between the front shell 312 and the substrate 311. The heating seat assembly 100 can move synchronously with the printhead body 310.

[0054] The printhead 300 may also include an extrusion assembly 320. The extrusion assembly 320 is fixed relative to the heating seat assembly 100; for example, the extrusion assembly 320 and the heating seat assembly 100 are respectively fixedly mounted on the printhead body 310 so that they can move synchronously. The extrusion assembly 320 is used to feed consumable 700 to the heating seat assembly 100. The heating seat assembly 100 is located below the extrusion assembly 320 in the Z direction and is used to receive the consumable 700 fed by the extrusion assembly 320, heat and melt the consumable 700, and print it onto the forming platform 510 to form a printed part.

[0055] Among them, consumable 700 can be a linear polymer material, also known as filament. Examples of consumable 700 include PLA (Polylactic Acid), PETG (Polyethylene Terephthalate Glycol), TPU (Thermoplastic Polyurethane), PVA (Polyvinyl Alcohol), BVOH (Butylene Vinyl Alcohol Copolymer), ABS (Acrylonitrile Butadiene Styrene), ASA (Acrylonitrile Styrene Acrylate), PC (Polycarbonate), PA (Polyamide), PET (Polyethylene Terephthalate), and PPS (Polyphenylene Powder). Sulfide (polyphenylene sulfide), carbon fiber reinforced materials (referring to a mixture of PLA and other base materials with carbon fiber), or glass fiber reinforced materials (referring to a mixture of PLA and other base materials with glass fiber), etc.

[0056] The extrusion assembly 320 may include a driving extrusion wheel 321 and a driven extrusion wheel 322, defining a consumable passage T1 between the driving and driven extrusion wheels 321 and 322. In use, a consumable 700 (such as a linear consumable) is placed into the consumable passage T1 and clamped by the driving and driven extrusion wheels 321 and 322. The driving extrusion wheel 321 is then driven (e.g., by a motor) to rotate, thereby conveying the consumable 700 to the heating seat assembly 100.

[0057] The consumable 700 can be wound on a tray, and the consumable 700 is conveyed to the consumable channel T1 by the rolling of the tray. The tray can be set inside the material box. Understandably, multiple trays can be set inside the material box, and the material and / or color of the consumable 700 wound on different trays can be the same or different.

[0058] In other embodiments, the printhead 300 may also exclude the extrusion assembly 320. In this case, the extrusion assembly 320 may be arranged at a remote end, for example, the extrusion assembly 320 may be fixedly mounted to the frame 520, fixed to the end of the optical axis 530, or fixed to the material box.

[0059] The heating seat assembly 100 is described below as an example. Figures 3-8 A heating seat assembly 100 of this embodiment is shown.

[0060] See Figure 3 This embodiment provides a heating seat assembly 100, which can be used in the print head 300 of a 3D printer 500 (such as an FDM 3D printer 500). The heating seat assembly 100 can heat the consumable so that the consumable can be extruded in a molten state.

[0061] See Figures 3-5 The heating seat assembly 100 includes a heating seat 10, a locking structure 20, a limiting member 30, and a hot end device 40. The locking structure 20 is fixed to the heating seat 10, and the limiting member 30 is movably disposed on the heating seat 10, with the limiting member 30 selectively contacting or separating from the locking structure 20. The hot end device 40 includes a heat dissipation element 41, a heat conduction element 42, a throat 43, and a nozzle 44. The heat conduction element 42 is spaced apart from the heat dissipation element 41. A portion of the throat 43 contacts the heat conduction element 42, and another portion of the throat 43 contacts the heat dissipation element 41. The nozzle 44 is connected to the heat conduction element 42 and communicates with the throat 43. At least a portion of the hot end device 40 is detachably disposed between the heating seat 10 and the limiting member 30.

[0062] Understandably, the hot end device 40 is detachably mounted on the heating base 10, and the limiting member 30 and locking structure 20 are used to fix the hot end device 40 to the heating base 10 or to remove the hot end device 40 from the heating base 10. The hot end device 40 can be completely removed from the heating base 10. In other embodiments, the hot end device 40 can be partially removed from the heating base 10, such as only the heat-conducting member 42, the throat 43, and the nozzle 44 can be removed from the heating base 10.

[0063] The heat-conducting element 42 is made of a heat-conducting material and is capable of melting consumables passing through it when heated by a heating element (such as an electric heating element).

[0064] See also Figure 5 In one embodiment, the heat sink 41 has an axially extending through hole K5, through which a throat 43 passes, with both ends of the throat 43 extending out of the heat sink 41. One end of a heat conductor 42 is connected to one end of the throat 43, and the other end of the heat conductor 42 is connected to a nozzle 44. Thus, consumables can enter the hot-end device 40 from the end of the throat 43 away from the heat conductor 42, be heated and melted at the heat conductor 42, and then extruded from the nozzle 44.

[0065] The throat 43 can be made of heat-insulating material to reduce the rate at which heat is conducted through the heat-conducting component 42. Simultaneously, the heat sink 41 can dissipate heat through liquid cooling, water cooling, or other methods to prevent the consumable material from overheating and melting at the heat sink 41, thus reducing the risk of blockage and feeding issues at the throat 43, heat sink 41, or the upper extrusion assembly 320. As shown in the figure, the heat sink 41 can be a finned heat sink, which can dissipate heat through a fan. Alternatively, the heat sink 41 can also be a heat sink with internal water-cooling channels.

[0066] In another embodiment, the end of the throat 43 away from the heat conductor 42 may not protrude through the heat sink 41. In this case, the end of the through hole K5 of the heat sink 41 away from the heat conductor 42 can serve as the consumable inlet of the hot end device 40.

[0067] In this embodiment, the hot end device 40 may further include an outer sleeve 45, which can be sleeved between the throat 43 and the heat sink 41 to protect the throat 43 and reduce damage to the throat 43 during long-term use. At the same time, the outer sleeve 45 can be reliably thermally coupled to the heat sink 41 and the throat 43 respectively, ensuring that the heat at the throat 43 can be quickly transferred to the heat sink 41 to accelerate the heat dissipation of the throat 43.

[0068] The outer tube 45 and the throat 43 can be interference-fitted to ensure a secure connection and improve thermal conductivity. Alternatively, the outer tube 45 can be made of copper or other thermally conductive materials to ensure better heat dissipation.

[0069] The connection between the throat 43 and the heat sink 41, the connection between the throat 43 and the heat conductor 42, and the connection between the heat conductor 42 and the nozzle 44 can all be achieved by interference fit, threaded connection, or other forms of connection.

[0070] In this embodiment, the heat sink 41 can be fixed to the printhead body 310, such as by screws. The throat 43 and the heat sink 41 can be detachably connected.

[0071] When it is necessary to disassemble the hot end device 40, the user can move the limiting member 30 to separate from the locking structure 20. At this time, the limiting member 30 can move to a position away from the hot end device 40, so that the hot end device 40 can be disassembled from the heating base 10.

[0072] When the hot end device 40 needs to be installed, the user can first place the hot end device 40 on the heating base 10, and then move the limiting member 30 to the position that contacts the locking structure 20. At this time, the limiting member 30 limits the hot end device 40 to the heating base 10, and the movement of the limiting member 30 is locked by the locking structure 20, so that the hot end device 40 can be reliably limited on the heating base 10.

[0073] Optionally, the hot end device 40 is mutually positioned with the heating base 10 via its heat-conducting element 42. When the heat-conducting element 42 is positioned within the heating base 10, the heat-conducting element 42 and the heating base 10 are thermally coupled, allowing heat from the heating base 10 to be conducted to the heat-conducting element 42. For example, the heating base 10 has a receiving groove C3 extending axially along the hot end device 40, and the receiving groove C3 has a second opening K4 in the lateral direction. The heat-conducting element 42 is generally strip-shaped and can be accommodated in the receiving groove C3, making thermal contact with the groove surface of the receiving groove C3.

[0074] In this embodiment, the locking structure 20 is fixed to the heating base 10, which has good overall structure. The locking structure 20 and the heating base 10 can be easily integrally molded, which is convenient to process and can reduce the number of components.

[0075] See also Figures 3-6 In this embodiment, the limiting member 30 is rotatably fitted to the heating base 10 and can rotate to a position that contacts or separates from the locking structure 20. Figure 3 In the middle, the limiting member 30 and the locking structure 20 are in contact with each other.

[0076] For example, the heating base 10 is provided with at least one rotatable fitting hole K3. The limiting member 30 includes a rotating shaft section 31. The rotating shaft section 31 is rotatably fitted into the at least one rotatable fitting hole K3. The rotating shaft section 31 can selectively contact or separate from the hot end device 40.

[0077] The limiting member 30 may further include a locking section 32 connected to the rotating shaft section 31. When the rotating shaft section 31 rotates relative to the heating base 10, the locking section 32 can move to contact the locking structure 20 and be blocked by the locking structure 20. At this time, the rotating shaft section 31 contacts the hot end device 40 to press the heat-conducting element 42 of the hot end device 40 against the heating base 10, ensuring reliable thermal contact between the heat-conducting element 42 and the heating base 10. The locking section 32 may also move away from the locking structure 20 as the rotating shaft section 31 rotates, at which time the rotating shaft section 31 also moves away from the hot end device 40, allowing the hot end device 40 to be detached from the heating base 10. Optionally, the locking structure 20 includes a mating protrusion 21 protruding from the heating base 10, and the locking section 32 can selectively contact or separate from the mating protrusion 21. The mating protrusion 21 may be provided with a locking groove C1, and the groove wall of the locking groove C1 can selectively contact or separate from the locking section 32. For example, the heating base 10 has two outer surfaces P5 facing away from each other along the axial direction of the rotating shaft section 31, and the receiving groove C3 is located between the two outer surfaces P5. A mating protrusion 21 protrudes from one of the two outer surfaces P5 of the heating base 10, and a locking section 32 is connected to the end of the rotating shaft section 31 near the mating protrusion 21. Alternatively, the mating protrusion 21 may protrude from one surface of the heating base 10 along the axial direction of the rotating shaft section 31.

[0078] In this embodiment, the limiting member 30 is formed by bending a flexible metal wire, and the locking segment 32 is bent approximately 90 degrees relative to the rotating shaft segment 31. The rotating shaft segment 31 spans the receiving groove C3 of the heating seat 10, and the rotation axis of the rotating shaft segment 31 is perpendicular or approximately perpendicular to the axial direction of the hot end device 40. The rotating shaft segment 31 and the locking segment 32 are bent approximately in an L-shape so that the locking member can rotate to the side of the heating seat 10 where the mating protrusion 21 is provided, and contact or separate from the mating protrusion 21.

[0079] Optionally, the mating protrusion 21 has a guide slope P1 on the side near the rotating shaft section 31. In some embodiments, in the Y-direction from front to back, the guide slope P1 may extend obliquely in the X-direction away from the heating base 10. The mating protrusion 21 has a locking groove C1 on the side opposite to the guide slope P1. Thus, during rotation, the locking section 32 can move to the back side of the mating protrusion 21 (i.e., the side where the locking groove C1 is provided) under the guidance of the guide slope P1 and engage with the locking groove C1, or it can disengage from the locking groove C1 under external force. That is, the locking section 32 can move to be located inside or outside the locking groove C1. The engagement of the locking section 32 with the locking groove C1 makes it less likely for the locking section 32 to accidentally disengage from the mating protrusion 21, ensuring that the limiting member 30 reliably limits the hot end device 40 to the heating base 10.

[0080] In this embodiment, by making the limiting member 30 elastic, the free end of the locking segment 32 can be offset away from the axis of the rotating shaft segment 31 to avoid the mating protrusion 21 and rotate to the back side of the mating protrusion 21. However, the free end of the locking segment 32 can elastically approach the rotating shaft segment 31 and spring back into the locking groove C1 that contacts the mating protrusion 21.

[0081] Optionally, the limiting member 30 also includes a connecting section 33, which connects the pivot section 31 and the locking section 32. For example, the connecting section 33 is bent relative to the pivot section 31 (e.g., bent at about 90°), and the locking section 32 is bent relative to the connecting section 33 (e.g., bent at 90°).

[0082] The locking section 32, away from the pivot section 31, can be connected to the handle section 34, which allows for easy gripping and operation to rotate the limiting member 30.

[0083] In this embodiment, optionally, the heating base 10 includes a heating base body 11 and a first hook-shaped portion 12 and a second hook-shaped portion 13 protruding from the heating base body 11. The first hook-shaped portion 12 and the second hook-shaped portion 13 are spaced apart, and the first hook-shaped portion 12 and the second hook-shaped portion 13 are respectively provided with a rotating fitting hole K3.

[0084] A receiving groove C3 is formed on the front surface P2 of the heating base 10. The first hook-shaped portion 12 and the second hook-shaped portion 13 can protrude from the front surface P2 of the heating base body 11 and are located on both sides of the receiving groove C3. The first hook-shaped portion 12 and the second hook-shaped portion 13 can each be U-shaped with an upward opening (i.e., in the direction of upward along the axial direction of the hot end device 40), so that the rotating fitting hole K3 opens upward, so as to facilitate the insertion of the rotating shaft section 31 into the rotating fitting hole K3 from top to bottom.

[0085] In other embodiments, the rotating fitting hole K3 may also be a circumferentially closed hole, which is not limited here.

[0086] In this embodiment, the at least one rotating fitting hole K3 includes a first rotating fitting hole K31 and a second rotating fitting hole K32. The rotating shaft segment 31 includes a first shaft segment 31a, a limiting segment 31b, and a second shaft segment 31c connected in sequence. The first shaft segment 31a is rotatably fitted into the first rotating fitting hole K31, and the second shaft segment 31c is rotatably fitted into the second rotating fitting hole K32. The limiting segment 31b can selectively contact or separate from the hot end device 40. For example, the limiting segment 31b is at least partially located in the second opening K4 of the receiving groove C3.

[0087] Optionally, the rotation axis of the limiting segment 31b does not coincide with that of the first shaft segment 31a, and / or the rotation axis of the limiting segment 31b does not coincide with that of the second shaft segment 31c. In this way, the rotating shaft segment 31 can rotate relative to the heating base 10 through its first shaft segment 31a and second shaft segment 31c. During the rotation, the limiting segment 31b of the rotating shaft segment 31 can press against or release the heat-conducting element 42.

[0088] In this embodiment, the first shaft segment 31a and the second shaft segment 31c are coaxial, and the limiting segment 31b protrudes to one side relative to the first shaft segment 31a and the second shaft segment 31c. The extending direction of the limiting segment 31b can be parallel to the axial direction of the first shaft segment 31a and the second shaft segment 31c. The limiting segment 31b can be formed by bending, which is simple in structure and easy to implement.

[0089] The distance between the limiting section 31b and the bottom of the receiving groove C3 is adjustable. For example, when the rotating shaft section 31 rotates to different angles, the limiting section 31b can rotate circumferentially to be close to or away from the bottom of the receiving groove C3. In this way, the limiting section 31b can press the hot end device 40 against the heating seat 10, or separate it from the hot end device 40.

[0090] See Figure 5 and Figure 6 Optionally, the heat-conducting component 42 is provided with a limiting groove C2, and the limiting segment 31b can selectively contact or separate from the groove wall of the limiting groove C2. When the limiting segment 31b is engaged with the limiting groove C2, the limiting segment 31b can contact the two groove walls of the limiting groove C2 that are opposite each other along the axial direction of the hot end device 40. In this way, the limiting segment 31b can limit the axial position of the hot end device 40, ensuring that the position of the hot end device 40 relative to the heating seat 10 is stable and reliable. At the same time, the limiting segment 31b can also provide axial support for the hot end device 40. In this way, the heat-conducting component 42 does not need to be provided with an additional structure to limit the axial position of the heating seat 10. Combined with the throat tube 43, which can be configured to be detachably connected to the heat sink 41, when the limiting component 30 leaves the heat-conducting component 42, the heat-conducting component 42, the nozzle 44, the throat tube 43, and the outer sleeve 45 can be removed as a whole, while the heat sink 41 can remain fixed on the heating seat 10 or the print head body 310 of the 3D printer 500.

[0091] The limiting groove C2 can be configured as a flared groove with a larger outer side and a smaller inner side to facilitate the rotation and movement of the limiting segment 31b. The limiting groove C2 has two side groove surfaces P3 and one bottom groove surface P4, with the two side groove surfaces P3 respectively connected to both sides of the bottom groove surface P4. The bottom groove surface P4 is a partially cylindrical surface to fit the cylindrical limiting segment 31b.

[0092] Furthermore, the heat-conducting element 42 is pressed onto the heating base 10 by the limiting element 30, and the cantilever length of the hot end device 40 is relatively short, which helps to ensure the stable and reliable position of the consumable outlet (i.e., the outlet of the nozzle 44) of the hot end device 40, and can reduce the stress deformation of the throat 43. Optionally, the limiting groove C2 is provided near the end of the heat-conducting element 42 close to the nozzle 44 to further reduce the cantilever length.

[0093] In contrast, in some known technologies, the component that is pressed by the hot end device 40 is the heat sink 41, and the cantilever length of the hot end device 40 is relatively long. In this case, it is difficult to ensure the positional accuracy of the nozzle 44. Furthermore, the horizontal load acting on the nozzle 44 and the heat conductor 42 will generate a bending moment at the throat 43, making the throat 43 prone to bending deformation.

[0094] In some other embodiments, the limiting member 30 may also be a rigid structure, in which case the mating protrusion 21 may be an elastic structure. In this case, during the rotation of the limiting member 30, its locking section 32 may compress the mating protrusion 21, causing the mating protrusion 21 to undergo elastic deformation to avoid the locking section 32, so that the locking section 32 can move to the back side of the mating protrusion 21.

[0095] See also Figure 7 and Figure 8 In this embodiment, the printhead 300 also includes a heating element 51. The heating element 51 is, for example, an electrothermal element that can generate heat when energized.

[0096] The heating element 51 can be disposed on the heating base 10, so that the heat generated by the heating element 51 can be transferred to the heat conductor 42 through the heating base 10. Optionally, the heating base 10 has a mounting space Q1 on the side opposite to the receiving groove C3, and the heating element 51 is at least partially disposed in the mounting space Q1, and can be plugged into the power supply interface through the power connector at the end of its lead wire. The power supply interface can be arranged on a circuit board fixed to the printhead body 310. In this way, the heating element 51 can be easily removed or connected by plugging and unplugging the power connector. In addition, when the hot end device 40 is removed, the heating element 51 does not need to be removed at the same time, which is convenient to use.

[0097] Optionally, the bottom surface P6 of the mounting space Q1 can be set as a semi-cylindrical shape, and the heating element 51 is bent into a semi-cylindrical sheet shape so that the heating element 51 can fit tightly against the heating base 10. In this way, the contact area between the heating element 51 and the heating base can be increased, which is beneficial to improving the heat conduction efficiency of the heating element 51 and the heating base 10.

[0098] In other embodiments, the heating element 51 may also be in other shapes, such as flat or cylindrical, and is not limited thereto.

[0099] See also Figure 7 and Figure 8In this embodiment, the printhead 300 may further include a temperature sensing element 52. The temperature sensing element 52 is used to detect temperature. For example, the temperature sensing element 52 includes a thermistor, which is used to detect temperature. The temperature sensing element 52 can be arranged in the mounting space Q1, and can be in thermal contact with the heating base 10. Alternatively, the heating base 10 can have a through hole K6 connecting the mounting space Q1 and the receiving groove C3, and the temperature sensing element 52 can be in thermal contact with the heat-conducting element 42 through the through hole K6. Thus, the temperature sensing element 52 can accurately detect the temperature at the heat-conducting element 42. The temperature sensing element 52 can be plugged into a circuit board fixed to the printhead body 310 via a power connector at the end of its lead. This allows for easy removal or connection of the temperature sensing element 52 by plugging and unplugging the power connector. Furthermore, when removing the hot end device 40, the temperature sensing element 52 does not need to be removed simultaneously, making it convenient to use.

[0100] In this embodiment of the 3D printer 500 and printhead 300, the steps for disassembling the hot end device 40 are as follows: First, the user holds the handle 35 and causes the locking segment 32 to elastically deform backward along the Y direction until the locking segment 32 leaves the locking groove C1 of the mating protrusion 21; then, the locking segment 32 is elastically deformed along the X direction away from the heating seat 10 until the locking segment 32 and the mating protrusion 21 are misaligned along the X direction; then, the locking segment 32 is moved forward along the Y direction to drive the rotating shaft segment 31 to rotate relative to the heating seat 10 until the limiting segment 31b of the rotating shaft segment 31 leaves the limiting groove C2 of the heat-conducting element 42, thereby releasing the limiting of the heat-conducting element 42. At this time, if the heat sink 41 is fixed to the printhead body 310 and the throat 43 is detachably connected to the heat sink 41, the entire assembly consisting of the nozzle 44, the heat conductor 42, the throat 43, and the outer sleeve 45 can be removed together; if the heat sink 41 is not fixed to the printhead body 310, the entire assembly consisting of the nozzle 44, the heat conductor 42, the throat 43, the outer sleeve 45, and the heat sink 41 can be removed together.

[0101] The steps for installing the hot end device 40 are the reverse of the steps for disassembling the hot end device 40 described above, and will not be repeated here.

[0102] In this embodiment, the printhead 300 may optionally include a strain gauge holder.

[0103] The strain gauge support includes a first strain gauge sub-support and a second strain gauge sub-support. The first strain gauge sub-support extends horizontally (e.g., in the Y direction), and the second strain gauge sub-support extends vertically (i.e., in the Z direction). The upper end of the second strain gauge sub-support is fixedly connected to the rear end of the first strain gauge sub-support. The strain gauge support may be made of aluminum. In other embodiments, the strain gauge support may consist only of the first strain gauge sub-support, which extends horizontally (e.g., in the Y direction). Understandably, the second strain gauge sub-support may be a substrate 311.

[0104] The front end of the first sub-support of the strain gauge defines a throat hole that extends forward and backward, which is used to place the upper end of the throat when the hot end device is installed.

[0105] The first sub-support of the strain gauge has threaded holes at both ends of its lateral direction. The threaded holes are used to install the strain gauge support onto the printhead body.

[0106] The lower end face of the first strain gauge sub-support is divided into a first lower end face and a second lower end face along the front-rear direction. The second lower end face is located in front of the first lower end face. A detection unit is provided on the first lower end face. When the hot-end device is installed, the detection unit contacts the rear part of the upper end face of the heat sink (in other embodiments, other positions of the first strain gauge sub-support may also contact the upper end face of the heat sink). The detection unit can detect the force applied by the heat sink to the first strain gauge sub-support. The measured force can have different uses, for example: (1) The forming platform of a 3D printer may not be flat enough. In order to ensure the printing quality, it is necessary to detect the flatness of the forming platform so as to compensate for the up and down movement of the print head. When measuring the flatness of the forming platform, the print head moves down from the first horizontal position to the position where the nozzle contacts the forming platform. At this time, the detection unit measures one of the above-mentioned forces. The print head then moves down the same distance from the second horizontal position. At this time, the detection unit measures another of the above-mentioned forces. If the two forces are equal, the positions of the two points are horizontal; if they are not equal, it is necessary to compensate for the movement of the print head. The specific compensation is determined according to the magnitude of the two forces. The greater the difference in forces, the greater the compensation distance; the smaller the difference in forces, the smaller the compensation distance. Here, two horizontal positions are used for explanation. In practice, the above operation can be performed on multiple horizontal positions. (2) Used to detect whether the feeding of the wire is smooth. If the feeding is not smooth, the movement of the wire downstream will cause the hot end device to move downward. At this time, the force measured by the detection unit will decrease. When the force measured by the detection unit decreases, a prompt message can be issued to remind the user, or the extrusion force of the wire can be increased.

[0107] (3) Used to detect the flow rate of wire material. The movement of wire material downstream will cause the hot end device to move downward. At this time, the force measured by the detection unit will become smaller. Therefore, the larger the flow rate, the smaller the force. The magnitude of the force can indicate the flow rate of the wire material.

[0108] The first lower end face can contact the front part of the upper end face of the radiator when the hot end device is installed. Since the first lower end face is horizontal and flat, and the upper end face of the radiator is flat, the verticality of the nozzle can be ensured when the hot end device is installed.

[0109] Figures 9-12 Another heating seat assembly 100a of this embodiment is shown, which is related to Figures 1-8 The main difference of the heating seat assembly 100 is at least that it uses a different limiting member 30a and locking structure 20a.

[0110] See Figure 9 and Figure 10 The heating seat assembly 100a includes a heating seat 10a, a locking structure 20a, a limiting member 30a, and a hot end device 40a. The heating seat 10a can be fixed to the printhead body 310.

[0111] The hot-end device 40a includes a heat sink 41, a heat conductor 42, a throat 43, and a nozzle 44. The heat conductor 42 is spaced apart from the heat sink 41, the throat 43 connects the heat conductor 42 and the heat sink 41, and the nozzle 44 is connected to the heat conductor 42 and communicates with the throat 43. At least a portion of the hot-end device 40a is detachably disposed between the heating base 10a and the limiting member 30a. The limiting member 30a is movably disposed on the heating base 10a, and a locking structure 20a is fixed to the heating base 10a, the locking structure 20a being used to restrict the movement of the limiting member 30a.

[0112] The heat-conducting element 42 of the hot-end device 40a may be detachably disposed between the heating base 10a and the limiting member 30a. The hot-end device 40a may also include an outer sleeve 45 fitted between the throat 43 and the heat sink 41. The heat sink 41, heat-conducting element 42, throat 43, outer sleeve 45, and nozzle 44 may be fixed together, while the heat sink 41 may not be fixed to the printhead body 310. This allows for the complete disassembly of the hot-end device 40a. See also: Figure 11 In this embodiment, one end of the limiting member 30a is rotatably and slidably disposed on the heating base 10a. The limiting member 30a has a first sliding position W1 and a second sliding position W2. When the limiting member 30a is in the first sliding position W1, the locking structure 20a restricts the rotation of the limiting member 30a. When the limiting member 30a is in the second sliding position W2, the locking structure 20a releases the rotation of the limiting member 30a.

[0113] For the steps of disassembling the hot end device 40a, please refer to [link / reference]. Figure 11 First, slide the limiting member 30a along the direction of the first arrow A1, so that the limiting member 30a slides from the first sliding position W1 to the second sliding position W2. In the second sliding position W2, the limiting member 30a can rotate relative to the heating base 10a along the direction of the second arrow A2 to open the receiving groove C3 of the heating base 10a, thereby allowing the heat-conducting member 42 to be removed from the heating base 10a.

[0114] In this embodiment, the limiting member 30a needs to slide and then rotate before the hot end device 40a can be disassembled, which helps to prevent accidental contact that could cause the hot end device 40a to loosen relative to the heating seat 10a. In addition, this structure reduces the elasticity requirement of the limiting member 30a, which can avoid the risk of the hot end device 40a being unable to be locked due to the elastic failure of the limiting member 30a (such as plastic deformation leading to weakened elasticity).

[0115] See you again Figure 9 and Figure 10 The limiting member 30a has a first opening K1 at one end, and the heating base 10a includes a heating base body 11 and a first extension 14. The first extension 14 protrudes from the heating base body 11 and is at least partially located in the first opening K1. The limiting member 30a and the first extension 14 are slidably connected through the first opening K1. In this embodiment, the first opening K1 is recessed a certain distance from one end of the limiting member 30a along its length direction, so that the limiting member 30a can slide relative to the heating base 10a without separating from it. Optionally, one end of the first extension 14 is connected to one side of the heating base body 11 along the X direction, and the other end extends along the Y direction, protruding from the front surface of the heating base body 11 along the Y direction.

[0116] The heating base 10a also includes a first shaft portion 15, which is connected to the end of the first extension portion 14 away from the heating base body 11. One end of the limiting member 30a is rotatably connected to the first shaft portion 15, and the limiting member 30a is slidably connected to the first extension portion 14. Optionally, both ends of the first shaft portion 15 extend beyond the first extension portion 14, such that both ends of the first shaft portion 15 extend beyond the first extension portion 14 in the Z direction, so that the first shaft portion 15 and the first extension portion 14 form a T-shaped structure.

[0117] The first shaft portion 15 and the heating base body 11 can clamp one end of the limiting member 30a in the middle, preventing the end of the limiting member 30a from moving away from the heating base 10a, and allowing the limiting member 30a to rotate around the first shaft portion 15 at the second sliding position W2. After the limiting member 30a rotates away from the locking structure 20a around the first shaft portion 15, the limiting member 30a can be pulled out to the end away from the first shaft portion 15 to separate from the heating base 10a, facilitating the disassembly of the heat-conducting component 42.

[0118] In this embodiment, optionally, the locking structure 20a includes a second extension 22 and a second shaft 23. The second extension 22 protrudes from the heating base body 11, and the second extension 22 and the first extension 14 are located on opposite sides outside the receiving groove C3. For example, one end of the second extension 22 is connected to the front surface of the heating base body 11 along the Y direction, and the other end extends along the Y direction and protrudes from the front surface of the heating base body 11 along the Y direction. The second shaft 23 is connected to the end of the second extension 22 away from the heating base body 11, and one or both ends of the second shaft 23 extend beyond the second extension 22, such as one or both ends of the second shaft 23 extending beyond the second extension 22 along the Z direction, so that the second shaft 23 and the second extension 22 form a T-shaped structure (see...). Figure 10 It can be an L-shaped structure (not shown in the figure). The other end of the limiting member 30a is provided with a limiting hole K2, and the second extension 22 and the second shaft 23 limit the rotation of the limiting member 30a through the limiting hole K2.

[0119] For example, the limiting hole K2 includes a first hole segment K21 and a second hole segment K22 that are connected, and the length of the first hole segment K21 is less than the length of the second shaft portion 23, and the length of the second shaft portion 23 is less than or equal to the second hole segment K22. Thus, in the first sliding position W1, the second shaft portion 23 is at the first hole segment K21, and the limiting member 30a is blocked by the second shaft portion 23 and cannot be disengaged from the locking structure 20a; in the second sliding position W2, the second shaft portion 23 is at the second hole segment K22, and the limiting member 30a can rotate around the first shaft segment 31a so that the second hole segment K22 of the limiting member 30a passes through the second shaft portion 23, so that the limiting member 30a can be separated from the locking structure 20a, thereby opening the receiving groove C3 of the heating seat 10a and allowing the heat-conducting member 42 to be removed from the heating seat 10a.

[0120] In other embodiments, the positions of the aforementioned limiting hole K2, the second extension 22, and the second shaft 23 can be interchanged. That is, the limiting hole K2 is opened on the locking structure 20a, and the second extension 22 and the second shaft 23 are disposed on the limiting member 30a.

[0121] Optionally, the limiting member 30a is also provided with a curved and extended handle portion 35 at one end near the locking structure 20a. The handle portion 35 allows the user to hold it to drive the limiting member 30a to slide or rotate.

[0122] See Figure 12In this embodiment, the heat-conducting element 42 is provided with a positioning protrusion 42a at one or both ends along the axial direction of the hot end device 40a. During installation, the positioning protrusion 42a contacts the heating base 10a. In some embodiments, the positioning protrusion 42a can guide the heat-conducting element into the heating base 10a. Furthermore, when the heat-conducting element 42 is fitted onto the heating base 10a, the positioning protrusion 42a and the heating base 10a are in contact and / or positioned along the axial direction (e.g., parallel to the Z-direction) of the hot end device 40a to ensure that the position of the heat-conducting element 42 is fixed and that the heat-conducting element 42 can be axially supported on the heating base 10a.

[0123] In this embodiment, the limiting member 30a can rotate to open the receiving groove C3 after sliding, thereby allowing the heat-conducting member 42 to leave the receiving groove C3 from the second opening K4.

[0124] In summary, the heating seat assemblies 100, 100a of this application embodiment can easily disassemble or install the hot end devices 40, 40a, making them convenient to use.

[0125] See you again Figure 1 and Figure 2 This embodiment also provides a printhead 300, which includes a printhead body 310 and a heating seat assembly 100a.

[0126] See again Figures 9-12 The heating seat assembly 100a includes a heating seat 10a, a locking structure 20a, a limiting member 30a, and a hot-end device 40a. The heating seat 10a can be fixed to the printhead body 310. The limiting member 30a is movably disposed on the heating seat 10a, and the locking structure 20a is fixed to the heating seat 10a, used to restrict the movement of the limiting member 30a. The hot-end device 40a includes a heat sink 41, a heat conductor 42, a throat 43, and a nozzle 44. The heat conductor 42 is spaced apart from the heat sink 41, the throat 43 connects the heat conductor 42 and the heat sink 41, the nozzle 44 is connected to the heat conductor 42, and the nozzle 44 communicates with the throat 43. At least a portion of the hot-end device 40a is detachably disposed between the heating seat 10a and the limiting member 30a. The specific configuration of the printhead body 310 and the heating seat assembly 100a can be found in the above embodiments, and will not be repeated here.

[0127] In some embodiments, one end of the limiting member 30a is rotatably and slidably disposed on the heating base 10a. The limiting member 30a has a first sliding position W1 and a second sliding position W2. When the limiting member 30a is in the first sliding position W1, the locking structure 20a restricts the rotation of the limiting member 30a. When the limiting member 30a is in the second sliding position W2, the locking structure 20a releases the rotation of the limiting member 30a. The specific configuration of the limiting member 30a and the locking structure 20a can be found in the above embodiments, and will not be repeated here.

[0128] In some embodiments, one end of the limiting member 30a is provided with a first opening K1, and the heating base 10a includes a heating base body 11 and a first extension 14. The first extension 14 protrudes from the heating base body 11 and is at least partially located in the first opening K1. The limiting member 30a and the first extension 14 are slidably connected through the first opening K1. The specific arrangement of the first opening K1, the heating base body 11, and the first extension 14 can be found in the above embodiments and will not be repeated here.

[0129] In some embodiments, the heating base 10a further includes a first shaft portion 15, which is connected to one end of the first extension 14 away from the heating base body 11, and one end of the limiting member 30a is rotatably connected to the first shaft portion 15. In some embodiments, both ends of the first shaft portion 15 extend beyond the first extension 14. The specific configuration of the first shaft portion 15 can be found in the above embodiments, and will not be repeated here.

[0130] In some embodiments, the locking structure 20a includes a second extension 22 and a second shaft 23. The second extension 22 protrudes from the heating base body 11, and the second shaft 23 is connected to the end of the second extension 22 away from the heating base body 11. One or both ends of the second shaft 23 extend beyond the second extension 22, and a limiting hole K2 is provided at the other end of the limiting member 30a. The second extension 22 and the second shaft 23 limit the rotation of the limiting member 30a through the limiting hole K2. The specific arrangement of the second extension 22, the second shaft 23, and the limiting hole K2 can be found in the above embodiments, and will not be repeated here.

[0131] In some embodiments, the limiting hole K2 includes a first hole segment K21 and a second hole segment K22 that are connected, and the length of the first hole segment K21 is less than the length of the second shaft portion 23, and the length of the second shaft portion 23 is less than or equal to the second hole segment K22. The specific configuration of the first hole segment K21 and the second hole segment K22 can be found in the above embodiments, and will not be repeated here.

[0132] This embodiment also provides a 3D printer 500, which includes a forming platform 510 and a print head 300. The print head 300 includes a print head body 310 and a heating seat assembly 100a. The print head body 310 is movable relative to the forming platform 510. The heating seat assembly 100a includes a heating seat 10a, a locking structure 20a, a limiting member 30a, and a hot end device 40a. The heating seat 10a is fixed to the print head body 310. The locking structure 20a protrudes and is fixed to the heating seat 10a. The limiting member 30a is at least rotatably disposed on the heating seat 10a. The limiting member 30a and the locking structure... The 20a can selectively contact or separate. The hot-end device 40a includes a heat sink 41, a heat conductor 42, a throat 43, and a nozzle 44. In the extending direction of the throat 43, the heat conductor 42 and the heat sink 41 are spaced apart, and the heat conductor 42 contacts the throat 43, the heat sink 41 contacts the throat 43, the nozzle 44 is connected to the heat conductor 42, and the nozzle 44 communicates with the throat 43. At least a portion of the hot-end device 40a is detachably disposed between the heating seat 10a and the limiting member 30a. Other structures of the forming platform 510, the print head 300, and the 3D printer 500 can be referred to in the above embodiments and will not be repeated here.

[0133] In some embodiments, the heating base 10a defines a receiving groove C3 having a second opening K4, and the heat-conducting member 42 is at least partially detachably disposed in the receiving groove C3; and the limiting member 30a includes a rotating shaft section 31, the rotating shaft section 31 including a limiting section 31b at least partially located in the second opening K4, and the distance between the limiting section 31b and the bottom of the receiving groove C3 is adjustable. The specific arrangement of the receiving groove C3 and the rotating shaft section 31 can be found in the above embodiments, and will not be repeated here.

[0134] In some embodiments, the limiting member 30a further includes a locking segment 32, which is bent and connected to the pivot segment 31. The locking segment 32 can selectively contact or separate from the locking structure 20a. The specific configuration of the locking segment 32 can be found in the above embodiments and will not be repeated here.

[0135] In some embodiments, the locking structure 20a includes a mating protrusion 21, which has a locking groove C1, and the locking segment 32 is movable to be located within or outside the locking groove C1. The specific configuration of the mating protrusion 21 can be found in the above embodiments and will not be repeated here.

[0136] In some embodiments, the heating base 10a includes a heating base body 11, a first extension 14, and a first shaft 15. The first extension 14 protrudes from the heating base body 11, the first shaft 15 is connected to the end of the first extension 14 away from the heating base body 11, one end of a limiting member 30a is rotatably connected to the first shaft 15, and the limiting member 30a is slidably connected to the first extension 14. The specific arrangement of the heating base body 11, the first extension 14, and the first shaft 15 can be found in the above embodiments, and will not be repeated here.

[0137] In some embodiments, the locking structure 20a includes a second extension 22 and a second shaft 23. The second extension 22 protrudes from the heating base body 11, and the second shaft 23 is connected to the end of the second extension 22 away from the heating base body 11. The second shaft 23 is larger than the second extension 22. The second extension 22 and the second shaft 23 can selectively contact or separate from the other end of the limiting member 30a. The specific configuration of the second extension 22 and the second shaft 23 can be found in the above embodiments and will not be repeated here.

[0138] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A heating seat assembly, characterized by, include: Heated base; A locking structure, wherein the locking structure is fixed to the heating base; A limiting member is movably disposed on the heating base, and the limiting member can selectively contact or separate from the locking structure; as well as A hot-end device includes a heat sink, a heat conductor, a throat, and a nozzle. The heat conductor is spaced apart from the heat sink. A portion of the throat contacts the heat conductor, and another portion of the throat contacts the heat sink. The nozzle is connected to the heat conductor and communicates with the throat. At least a portion of the hot-end device is detachably disposed between the heating base and the limiting member.

2. The heating seat assembly according to claim 1, characterized in that, The heating base is provided with at least one rotating fitting hole; and The limiting member includes a rotating shaft section, which is rotatably fitted into the at least one rotating fitting hole, and the rotating shaft section can selectively contact or separate from the hot end device.

3. The heating seat assembly according to claim 2, characterized in that, The heating base includes a heating base body and a first hook-shaped portion and a second hook-shaped portion protruding from the heating base body. The first hook-shaped portion and the second hook-shaped portion are spaced apart, and the first hook-shaped portion and the second hook-shaped portion are respectively provided with the rotating engagement hole.

4. The heating seat assembly according to claim 2, characterized in that, The at least one rotating fitting hole includes a first rotating fitting hole and a second rotating fitting hole; and The rotating shaft section includes a first shaft section, a limiting section, and a second shaft section connected in sequence. The first shaft section is rotatably fitted into the first rotating fitting hole, and the second shaft section is rotatably fitted into the second rotating fitting hole. The limiting section can selectively contact or separate from the hot end device.

5. The heating seat assembly according to claim 4, characterized in that, The limiting segment does not coincide with the rotation axis of the first shaft segment, and / or the limiting segment does not coincide with the rotation axis of the second shaft segment; and The heat-conducting component is provided with a limiting groove, and the limiting segment can selectively contact or separate from the groove wall of the limiting groove.

6. The heating seat assembly according to claim 2, characterized in that, The limiting member further includes a locking section connected to the rotating shaft section; and The locking structure includes a mating protrusion protruding from the heating seat, and the locking segment can selectively contact or separate from the mating protrusion.

7. The heating seat assembly according to claim 6, characterized in that, The mating protrusion is provided with a locking groove, and the groove wall of the locking groove can selectively contact or separate from the locking segment.

8. A printhead, characterized by, include: Printhead body; as well as, A heating seat assembly includes a heating seat, a locking structure, a limiting member, and a hot end device. The heating seat is fixed to the printhead body. The limiting member is movably disposed on the heating seat. The locking structure is fixed to the heating seat and restricts the movement of the limiting member. The hot end device includes a heat sink, a heat conductor, a throat, and a nozzle. The heat conductor and the heat sink are spaced apart. The throat connects the heat conductor and the heat sink. The nozzle is connected to the heat conductor and communicates with the throat. At least a portion of the hot end device is detachably disposed between the heating seat and the limiting member.

9. The printhead according to claim 8, characterized in that, One end of the limiting member is rotatably and slidably disposed on the heating base. The limiting member has a first sliding position and a second sliding position. When the limiting member is in the first sliding position, the locking structure restricts the rotation of the limiting member. When the limiting member is in the second sliding position, the locking structure releases the rotation of the limiting member.

10. The printhead according to claim 8, characterized in that, One end of the limiting member is provided with a first opening; and The heating base includes a heating base body and a first extension. The first extension protrudes from the heating base body and is at least partially located in the first opening. The limiting member is slidably connected to the first extension through the first opening.

11. The printhead according to claim 10, characterized in that, The heating base further includes a first shaft portion, which is connected to one end of the first extension portion away from the heating base body, and one end of the limiting member is rotatably connected to the first shaft portion.

12. The printhead according to claim 11, characterized in that, Both ends of the first shaft extend beyond the first extension portion.

13. The printhead according to claim 10, characterized in that, The locking structure includes a second extension and a second shaft. The second extension protrudes from the heating base body, and the second shaft is connected to one end of the second extension away from the heating base body. One or both ends of the second shaft extend beyond the second extension. The other end of the limiting member is provided with a limiting hole, and the second extension and the second shaft portion limit the rotation of the limiting member through the limiting hole.

14. The printhead according to claim 13, characterized in that, The limiting hole includes a first hole segment and a second hole segment that are connected, and the length of the first hole segment is less than the length of the second shaft portion, and the length of the second shaft portion is less than or equal to the length of the second hole segment.

15. A three-dimensional printer, characterized by include: Molding platform; as well as A printhead includes a printhead body and a heating seat assembly. The printhead body is movable relative to the forming platform. The heating seat assembly includes a heating seat, a locking structure, a limiting member, and a hot-end device. The heating seat is fixed to the printhead body. The locking structure protrudes and is fixed to the heating seat. The limiting member is at least rotatably disposed on the heating seat. The limiting member and the locking structure can selectively contact or separate. The hot-end device includes a heat sink, a heat conductor, a throat, and a nozzle. In the extending direction of the throat, the heat conductor and the heat sink are spaced apart, and the heat conductor contacts the throat. The heat sink contacts the throat. The nozzle is connected to the heat conductor and communicates with the throat. At least a portion of the hot-end device is detachably disposed between the heating seat and the limiting member.

16. The three-dimensional printer according to claim 15, characterized in that, The heating base defines a receiving groove with a second opening, and the heat-conducting element is at least partially detachably disposed in the receiving groove; and The limiting member includes a rotating shaft section, which includes a limiting section at least partially located in the second opening, and the distance between the limiting section and the bottom of the receiving groove is adjustable.

17. The three-dimensional printer according to claim 16, characterized in that, The limiting member also includes a locking section, which is bent and connected to the rotating shaft section. The locking section can selectively contact or separate from the locking structure.

18. The three-dimensional printer according to claim 17, characterized in that, The locking structure includes a mating protrusion, the mating protrusion having a locking groove, and the locking segment being movable to be located inside or outside the locking groove.

19. The three-dimensional printer according to claim 15, characterized in that, The heating base includes a heating base body, a first extension and a first shaft. The first extension protrudes from the heating base body, and the first shaft is connected to the end of the first extension away from the heating base body. One end of the limiting member is rotatably connected to the first shaft, and the limiting member is slidably connected to the first extension.

20. The three-dimensional printer according to claim 19, characterized in that, The locking structure includes a second extension and a second shaft. The second extension protrudes from the heating base body, and the second shaft is connected to one end of the second extension away from the heating base body. The second shaft is larger than the second extension. The second extension and the second shaft can selectively contact or separate from the other end of the limiting member.

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