Hot end 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 technology is inconvenient to disassemble a hot end assembly, and provides a hot end assembly, a printing head and a three-dimensional printer. The hot end assembly comprises a heat dissipation piece, a heat conduction piece, a throat pipe, a nozzle and a locking piece. The heat conduction piece is arranged in space with the heat dissipation piece. One part of the throat pipe is connected with the heat conduction piece, and the other part of the throat pipe is connected with the heat dissipation piece. The nozzle is communicated with the throat pipe, and the nozzle is located on the side of the heat conduction piece away from the heat dissipation piece. The locking piece is movably connected with the heat dissipation piece. The application has the beneficial effect that the hot end assembly is convenient to disassemble.

Description

Technical Field

[0001] This application relates to the field of 3D printing, specifically to hot-end components, printheads, and 3D printers. Background Technology

[0002] A 3D printer (also known as a stereo printer or three-dimensional printer) is a rapid prototyping process. Currently, the 3D printing technology that can be 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 assembly of the printer. The molten filament material is heated to a molten state within the hot-end assembly. The hot-end assembly then extrudes the molten material onto the forming platform as it moves along the printing path of the 3D printer, 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 component. Utility Model Content

[0004] This application provides a hot-end assembly, a printhead, and a 3D printer to solve the problem of inconvenient disassembly of the hot-end assembly in some known 3D printers.

[0005] In a first aspect, embodiments of this application provide a hot-end assembly, including a heat sink, a heat conductor, a throat, a nozzle, and a locking member. The heat conductor and the heat sink are spaced apart. A portion of the throat is connected to the heat conductor, and another portion of the throat is connected to the heat sink. The nozzle communicates with the throat and is located on the side of the heat conductor away from the heat sink. The locking member is movably connected to the heat sink.

[0006] In one possible implementation, one end of the locking member is rotatable about a first axis relative to the heat sink.

[0007] In one possible implementation, the locking member includes a locking rod, a first side rod, and a second side rod, which are respectively connected to the two ends of the locking rod. The ends of the first side rod and the second side rod away from the locking rod are rotatable about a first axis relative to the heat sink.

[0008] In one possible implementation, the hot end assembly further includes a handle rotatably disposed on the heat sink about a second axis, and one end of a locking member rotatably disposed on the handle about a first axis, the first axis and the second axis being parallel.

[0009] In one possible implementation, the first axis and the second axis are spaced apart.

[0010] In one possible implementation, the heat sink includes a heat sink body and a protrusion. The protrusion protrudes from the heat sink body and has a first pivot hole for rotating the locking component.

[0011] In one possible implementation, the heat dissipation body includes a heat dissipation section and a plurality of fins, the fins being spaced apart on one or more sides of the heat dissipation section. The heat dissipation component also includes a carrier plate section, the carrier plate section being connected to at least two fins located on the same side. A protrusion is connected to the carrier plate section and protrudes from the carrier plate section on the side opposite to the heat dissipation section.

[0012] Secondly, embodiments of this application provide a printhead including a connector and a hot-end assembly. The connector has a mounting slot. The hot-end assembly includes a heat sink, a heat conductor, a throat, a nozzle, and a locking member. The throat connects the heat sink and the heat conductor, the nozzle connects to the heat conductor, and the locking member is disposed on the heat sink. The locking member has a first state of being connected to the mounting slot and a second state of being separated from the mounting slot.

[0013] In one possible implementation, one end of the locking member is rotatably disposed on the heat sink about a first axis, and the locking member is in a first state or a second state by rotation.

[0014] In one possible implementation, the locking member includes a locking rod and at least one side rod, each side rod being connected to the locking rod. The locking member is disposed on the heat sink via at least one side rod. In a first state, the locking rod is connected to the mounting slot, and in a second state, the locking rod is separated from the mounting slot.

[0015] In one possible implementation, the hot end assembly further includes a handle rotatably disposed on the heat sink about a second axis. The handle has a second pivot hole extending along the direction of the first axis and is connected to one end of a locking member. The first axis and the second axis are arranged parallel and spaced apart.

[0016] In one possible implementation, the heat sink includes a heat sink body and a protrusion, the protrusion being fixed to one side of the heat sink body in the horizontal direction, and a handle being rotatably disposed on the protrusion about a second axis.

[0017] In one possible implementation, the heat sink includes a heat sink body and a protrusion, the protrusion protruding from the heat sink body. The heat sink body includes a heat sink portion and a plurality of fins, the heat sink portion extending along a first direction, and the plurality of fins distributed on one or both sides of the heat sink portion along a second direction; the second direction is perpendicular to the first direction. The heat sink also includes a carrier plate portion connected between at least two fins located on the same side; the protrusion is connected to the carrier plate portion.

[0018] In one possible implementation, the printhead further includes a heating seat connected to a connecting frame, the heating seat having a receiving groove; when the locking member is in a first state, the heat-conducting member is at least partially received in the receiving groove, and the size of the receiving groove at the end near the heat sink is smaller than the size of the end away from the heat sink.

[0019] Thirdly, embodiments of this application provide a 3D printer, which includes a forming platform and a print head. The print head includes a connecting frame and a hot end assembly. The connecting frame is movable relative to the forming platform. The hot end assembly includes a heat sink, a heat conductor, a throat, a nozzle, and a locking member. The throat connects the heat sink and the heat conductor, and the nozzle connects to the heat conductor. The locking member is movably disposed on the heat sink. The locking member has a first state in which the hot end assembly is connected to the connecting frame, and a second state in which the hot end assembly is separated from the connecting frame.

[0020] In one possible implementation, the locking member extends along at least a portion of the annular shape, defining a locking space. When the locking member is in a first state, at least a portion of the connecting bracket is located on one side of the locking space, and at least another portion of the connecting bracket is located on the other side of the locking space.

[0021] In one possible implementation, the locking element changes the relative position of the connecting frame and the locking space by rotation.

[0022] In one possible implementation, the hot end assembly further includes a handle rotatably disposed on the heat sink and rotatably connected to a locking member.

[0023] In one possible implementation, the heat sink includes a plurality of fins and a protrusion, the protrusion being provided on at least a portion of the fins, and a locking member being movably provided on the protrusion.

[0024] In one possible implementation, the printhead further includes a heating seat, which is fixedly connected to the connecting frame. The heating seat has a receiving groove for accommodating at least part of the heat-conducting component, and the upper end of the receiving groove is smaller than the lower end.

[0025] One of the above technical solutions has the following advantages or beneficial effects: In the embodiments of this application, the hot-end component, print head, and 3D printer have a locking component on the heat sink, which can lock or unlock the locking component with other structures of the print head, making the hot-end component easy to assemble and disassemble. Furthermore, the locking component is located on the heat sink rather than in other positions on the print head (such as the print head body), which reduces the complexity of the print head body structure. 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 This is a cross-sectional view of the printhead in an embodiment of this application.

[0029] Figure 3 for Figure 2 A three-dimensional diagram of part of the structure.

[0030] Figure 4 for Figure 3 A longitudinal sectional view.

[0031] Figure 5 for Figure 3 Another longitudinal sectional view.

[0032] Figure 6 for Figure 3 A cross-sectional view.

[0033] Figure 7 for Figure 3 An exploded view.

[0034] Figure 8 for Figure 7 Exploded view of the hot-end component.

[0035] Figure 9 for Figure 3 Another exploded view.

[0036] 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 - Driving extrusion wheel; 322 - Driven extrusion wheel; 323 - Driving gear; 324 - Driven gear; T 1-Consumable channel; 700-Consumable; 100-Hot end assembly; 10-Heat sink; 11-Heat sink body; 11a-Heat sink section; 11b-Fin; 12-Protrusion; K1-First pivot hole; 13-Carrier plate section; K8-Through hole; 20-Heat conductive component; 21-Heat conductive body; 22-Limiting protrusion; 31-Throat; 32-Nozzle; 40-Locking component; 41-Locking rod; 42-Side rod; 42a-First side rod; 42b-Second side rod ; 43a-First bending rod; 43b-Second bending rod; Q1-Locking space; 50-Handle; 51-Front plate; 52, 53-Folding plate; K2-Second pivot hole; K3-Third pivot hole; 54-Pivot piece; L1-First axis; L2-Second axis; 60-Connecting frame; 61-First frame plate; 62-Second frame plate; 63-Hook-shaped part; C1-Mounting groove; 64-Top abutment; K6-Throat hole; P1-First lower end face; P2- Second lower end face; 70-Heating seat; C2-Accommodation groove; C3-Snap-fit ​​groove; K4-Mating hole; 71-Limiting flange; K5-Limiting hole; P3-Guide slope; 80-Pressure piece; 81-Back plate; 82-Side plate; 83-Inner fold; 84-Elastic tongue plate; 91-Heat insulation piece; 92-Fastener; 93-Heating element; 94-Temperature detection element; 95-Insulation sleeve; Q2-Installation space; Z1-First direction; Y1-Second direction. Detailed Implementation

[0037] 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.

[0038] 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. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0039] 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.

[0040] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0041] Example See Figure 1 This embodiment also provides a 3D printer 500, which can specifically be a 3D printer 500 based on FDM technology.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] In other embodiments, the rack 520 may also take other forms of structure, which are not limited here.

[0046] 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.

[0047] 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.

[0048] See Figure 1 and Figure 2 In this embodiment, the printhead 300 includes a printhead body 310 and a hot end assembly 100.

[0049] 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.

[0050] 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 hot end assembly 100 is disposed between the front shell 312 and the substrate 311. The hot end assembly 100 can move synchronously with the printhead body 310.

[0051] The printhead 300 may also include an extrusion assembly 320. The extrusion assembly 320 is fixed relative to the hot-end assembly 100; for example, the extrusion assembly 320 and the hot-end assembly 100 are respectively fixed relative to the printhead body 310 so that they can move synchronously. The extrusion assembly 320 is used to feed consumable 700 to the hot-end assembly 100, which is located below the extrusion assembly 320 in the Z-direction. The hot-end assembly 100 receives the consumable 700 fed by the extrusion assembly 320, heats and melts the consumable 700, and prints it onto the forming platform 510 to form a printed part.

[0052] 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.

[0053] The extrusion assembly 320 may include a driving extrusion wheel 321 and a driven extrusion wheel 322, defining a consumable channel T1 between them. In use, a consumable (such as a linear consumable) is placed into the consumable channel T1 and clamped by the driving and driven extrusion wheels 321 and 322. The driving and driven extrusion wheels 321 and 322 then rotate in opposite directions to deliver the consumable to the hot-end assembly 100. In some embodiments, the extrusion assembly 320 further includes a driving gear 323 and a driven gear 324. The driving and driven gears 323 and 324 mesh with each other, with the driving extrusion wheel 321 fixed to the driving gear 323 and the driven extrusion wheel 322 fixed to the driven gear 324. Thus, when the drive gear 323 is driven to rotate (such as when it is driven by a motor), it will drive the driven gear 324 to rotate synchronously in the opposite direction. This will enable the drive extrusion wheel 321 and the driven extrusion wheel 322 to rotate, thereby realizing the delivery of consumables.

[0054] 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.

[0055] 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.

[0056] See Figures 3-9 This embodiment provides a hot-end assembly 100. The hot-end assembly 100 includes a heat sink 10, a heat conductor 20, a throat 31, a nozzle 32, and a locking member 40. The heat conductor 20 is spaced apart from the heat sink 10. A portion of the throat 31 is connected to the heat conductor 20, and another portion of the throat 31 is connected to the heat sink 10. The nozzle 32 communicates with the throat 31, and the nozzle 32 is located on the side of the heat conductor 20 opposite to the heat sink 10. The locking member 40 is movably connected to the heat sink 10.

[0057] In this embodiment, the locking member 40 is movably connected to the heat sink 10. The locking member 40 can move relative to the heat sink 10 so that the hot end assembly 100 is either locked onto the print head 300 or detachable from the print head 300. Thus, the hot end assembly 100, as an integral component, is conveniently provided as a component and is easy to assemble and disassemble.

[0058] The locking member 40 can be directly and movably connected to the heat sink 10, or it can be indirectly and movably connected to the heat sink 10 through an intermediate component (such as the handle 50 below), as long as the locking member 40 can move relative to the heat sink 10.

[0059] Optionally, one end of the locking member 40 can rotate about the first axis L1 relative to the heat sink 10. Thus, the locking member 40 can be rotated to lock or disassemble the hot-end assembly 100, making operation convenient. The first axis L1 can be located on or outside the heat sink 10.

[0060] In some embodiments, the first axis L1 can be a horizontally extending axis, specifically a horizontally extending axis. The extension direction of the first axis L1 can be perpendicular to the arrangement direction of the heat sink 10 and the heat conductor 20. The extension direction of the first axis L1 can be perpendicular to the feeding direction of the consumable 700.

[0061] In one embodiment, the locking member 40 includes a locking rod 41 and two side rods 42, which are a first side rod 42a and a second side rod 42b, respectively. The first side rod 42a and the second side rod 42b are respectively connected to the two ends of the locking rod 41. Thus, the locking rod 41, the first side rod 42a and the second side rod 42b are connected to form a U-shaped structure. The ends of the first side rod 42a and the second side rod 42b away from the locking rod 41 can rotate about the first axis L1 relative to the heat sink 10.

[0062] Thus, the locking member 40 can be rotatably connected to the heat sink 10 via the first side rod 42a and the second side rod 42b, thereby enabling its locking rod 41 to be rotatably locked or unlocked with other parts of the printhead 300 (such as the connecting frame 60 below) so that the hot end assembly 100 can be installed or removed.

[0063] In some embodiments, the locking member 40 may also include only a side rod 42. One end of the side rod 42 is rotatably connected to the heat sink 10, and the other end of the side rod 42 is fixedly connected to the locking rod 41, forming a T-shaped structure with the side rod 42 and the locking rod 41.

[0064] In this embodiment, optionally, the hot-end assembly 100 further includes a handle 50. The handle 50 is rotatably disposed on the heat sink 10 about a second axis L2, and one end of the locking member 40 is rotatably connected to the handle 50 about a first axis L1. The first axis L1 and the second axis L2 are parallel and spaced apart. Thus, when the handle 50 rotates about the second axis L2, it can cause one end of the locking member 40 to rotate, thereby displacing the locking rod 41 of the locking member 40, thereby moving the locking rod 41 to a locked state or an unlocked state. In some embodiments, the included angle between the first axis L1 and the second axis L2 can be less than or equal to 5 degrees, for example, it can be 0 degrees, 1 degree, 2 degrees, 3 degrees, 4 degrees, 5 degrees, etc. Figure 5 As shown, in the locked state illustrated, the second axis L2 is further away from the heat sink than the first axis L1, thus forming a self-locking mechanism.

[0065] In this embodiment, the heat sink 10 includes a heat sink body 11 and a protrusion 12. The protrusion 12 protrudes from the heat sink body 11 and has a first pivot hole K1 for rotating the locking member 40. By providing the protrusion 12, the installation of the locking member 40 and the handle 50 can be facilitated. Optionally, the protrusion 12 is fixed to one side of the heat sink body 11 in the horizontal direction (e.g., the Y direction), and the handle 50 is rotatably disposed on the protrusion 12 around the second axis L2.

[0066] In some embodiments, a rotating shaft 54 ​​is rotatably disposed within the first rotating shaft hole K1, and the handle 50 is connected to the rotating shaft 54 ​​and can rotate relative to the heat sink 10 via the rotating shaft 54. The end of the first side rod 42a away from the locking rod 41 is bent to form a first bent rod 43a, and the end of the second side rod 42b away from the locking rod 41 is bent to form a second bent rod 43b. The first bent rod 43a and the second bent rod 43b are rotatably engaged with the handle 50. The axis of the first rotating shaft hole K1 can be a second axis L2, and the axis of rotation of the first bent rod 43a and the second bent rod 43b relative to the handle 50 is the first axis L1.

[0067] In this embodiment, the locking rod 41, the first side rod 42a, the second side rod 42b, the first bent rod 43a, and the second bent rod 43b of the locking member 40 form a shape that extends at least partially along a ring. That is, the first bent rod 43a and the second bent rod 43b can be spaced apart from each other or can be in contact with each other. The locking member 40 defines a locking space Q1. When the locking member 40 is in the first state, at least a portion of the connecting frame 60 is located on one side of the locking space Q1, and at least another portion of the connecting frame 60 is located on the other side of the locking space Q1. The relative position of the locking member 40 with respect to the locking space Q1 can be changed by rotation, or by elastic deformation or other means.

[0068] Optionally, the handle 50 includes a front plate 51 and two folding plates 52 and 53. The two folding plates 52 and 53 are bent and connected to both sides of one end of the front plate 51 along its length. The other end of the front plate 51 along its length is used by the user to grip and operate the handle 50. The folding plates 52 and 53 have mutually spaced second pivot holes K2 and third pivot holes K3. The protrusion 12 of the heat sink 10 is located in the space between the two folding plates 52 and 53, resulting in a compact and reasonable structure. The pivot member 54 passes through the third pivot hole K3 of the folding plates 52 and 53 and the first pivot hole K1 of the protrusion 12, thereby realizing the rotational connection between the handle 50 and the heat sink 10.

[0069] The second pivot hole K2 extends along the first axis L1 and is located below the third pivot hole K3. The first bent rod 43a and the second bent rod 43b are respectively rotatably engaged with the second pivot holes K2 of the two folding plates 52 and 53, so that the locking member 40 is rotatably connected to the handle, thereby allowing the locking member 40 to rotate indirectly relative to the heat sink. Optionally, the locking member 40 can be formed by bending an elastic metal rod, so that the first side rod 42a and the second side rod 42b can elastically deform relative to the locking rod 41, so that the first bent rod 43a and the second bent rod 43b can be installed into the second pivot hole K2.

[0070] In this embodiment, the heat dissipation body 11 includes a heat dissipation section 11a and a plurality of fins 11b, which are spaced apart on one or more sides of the heat dissipation section 11a. For example, the heat dissipation section 11a may extend along a first direction Z1 and be used to connect to the throat 31. The plurality of fins 11b are distributed on one or both sides of the heat dissipation section 11a along a second direction Y1. The second direction Y1 is perpendicular to the first direction Z1. The first direction Z1 may be parallel to the Z-direction of the 3D printer 500, and the second direction Y1 may be parallel to the Y-direction of the 3D printer 500.

[0071] The heat sink 10 also includes a carrier plate portion 13, which connects at least two fins 11b located on the same side. A protrusion 12 is connected to the carrier plate portion 13 and protrudes from the side of the carrier plate portion 13 opposite to the heat sink portion 11a. Thus, the carrier plate portion 13, the heat sink portion 11a, and the at least two fins 11b can form a closed annular structure, ensuring high structural strength. Therefore, when the locking member 40 is in the locked state, the force applied to the carrier plate portion 13 by the locking member 40 through the protrusion 12 is less likely to deform the fins 11b of the heat sink 10. In some embodiments, the number of fins 11b is greater than two (four as shown in the figure). In this case, additional fins 11b are connected between the carrier plate portion 13 and the heat sink portion 11a within the annular structure, further increasing the structural strength of the heat sink 10.

[0072] In other embodiments, the handle 50 can be omitted, and the first bent rod 43a and the second bent rod 43b of the locking member 40 can be rotatably engaged with the first pivot hole K1 of the protrusion 12. In this case, the central axis of the first pivot hole K1 serves as the first axis L1, and the locking member 40 is rotatably connected to the heat sink 10 around the first axis L1, and can be locked to other components of the printhead 300 (such as the connecting frame 60 described below) by the locking rod 41. Of course, to ensure that the locking member 40 can move smoothly to the locked position and the unlocked position, the locking member 40 itself can have a certain elastic deformation capability.

[0073] In the hot end assembly 100, the heat-conducting element 20 is made of a heat-conducting material and is able to melt the consumable 700 passing through it under the heating of the heating element 93 (such as an electric heating element).

[0074] In one embodiment, the heat sink 10 has a through hole K8 extending axially (parallel to the Z-direction of the 3D printer 500), and a throat 31 passes through the through hole K8, with both ends of the throat 31 extending out of the heat sink 10. One end of the heat conductor 20 is connected to one end of the throat 31, and the other end of the heat conductor 20 is connected to the nozzle 32. Thus, the consumable 700 can enter the hot end assembly 100 from the end of the throat 31 away from the heat conductor 20, be heated and melted at the heat conductor 20, and then extruded from the nozzle 32.

[0075] The throat 31 can be made of heat-insulating material to reduce the rate at which heat is conducted through the throat 31 to the heat conductor 20. Meanwhile, the heat sink 10 can be a finned heat sink, which can dissipate heat through a fan to prevent the consumable material 700 from overheating and melting at the heat sink 10, thus reducing the risk of the consumable material 700 becoming blocked at the throat 31, the heat sink 10, or the upper extrusion assembly 320, preventing feeding.

[0076] In another embodiment, the end of the throat 31 away from the heat conductor 20 may not protrude through the heat sink 10. In this case, the end of the through hole K8 of the heat sink 10 away from the heat conductor 20 can serve as the inlet of the consumable 700 of the hot end assembly 100.

[0077] In this embodiment, the hot end assembly 100 may further include an outer sleeve, which can be fitted between the throat 31 and the heat sink 10 to protect the throat 31 and reduce damage to the throat 31 during long-term use. At the same time, the outer sleeve can be reliably thermally coupled to the heat sink 10 and the throat 31 respectively, ensuring that the heat at the throat 31 can be quickly transferred to the heat sink 10 to accelerate the heat dissipation of the throat 31.

[0078] The outer casing and throat 31 can be interference-fitted to ensure a secure connection and improve thermal conductivity. Alternatively, the outer casing can be made of copper or other thermally conductive materials to ensure better heat dissipation.

[0079] The throat 31 and the heat sink 10 can be connected to each other, and the throat 31 and the heat conductor 20 can be connected to each other. The connection between the throat 31 and the heat sink 10, the connection between the throat 31 and the heat conductor 20, and the connection between the heat conductor 20 and the nozzle 32 can all be made by interference fit, threaded connection or other forms of connection.

[0080] In other embodiments, the throat 31 and the heat sink 10 may also be in contact with each other without being fixedly connected.

[0081] See also Figures 3-9 In this embodiment, the printhead 300 also includes a connecting frame 60. The connecting frame 60 has a mounting slot C1. The locking member 40 has a first state connected to the mounting slot C1, and a second state separated from the mounting slot C1. The first state can be a locked state, in which the hot end assembly 100 is connected to the connecting frame 60; the second state can be an unlocked state, in which the hot end assembly 100 is separated from the connecting frame 60. The mounting slot C1 can improve the reliability of the locking member 40 on the connecting frame 60 and reduce the possibility of the locking member 40 accidentally disengaging from the connecting frame 60 in the first state.

[0082] In some embodiments, the locking member 40 is rotated to a first or second state, thus facilitating the assembly and disassembly of the hot end assembly 100.

[0083] When the locking member 40 is in the first state, the locking rod 41 is connected to the mounting groove C1, and the locking member 40 and the connecting bracket 60 are locked to each other, and the hot end assembly 100 is reliably locked on the connecting bracket 60; when the locking member 40 is in the second state, the locking rod 41 is separated from the mounting groove C1, and the hot end assembly 100 can be removed from the connecting bracket 60.

[0084] In this embodiment, the printhead 300 also includes a heating seat 70. The heating seat 70 is connected to the connecting frame 60 and has a receiving groove C2. When the locking member 40 is in the first state, the heat-conducting member 20 is at least partially received in the receiving groove C2. The heating seat 70 can be used to transfer heat to the heat-conducting member 20. In some embodiments, the heating seat 70 can also limit the heat-conducting member 20, so that the hot end assembly 100 is limited at both the heat sink 10 and the heat-conducting member 20, ensuring that the hot end assembly 100 is reliably limited. At the same time, limiting the heat-conducting member 20 can also reduce the cantilever length of the hot end assembly 100, which helps to ensure the stable and reliable position of the consumable 700 outlet (i.e., the outlet of the nozzle 32) of the hot end assembly 100, and can reduce the stress deformation of the throat 31.

[0085] In some embodiments, optionally, the dimension of the receiving groove C2 near the heat sink 10 is smaller than the dimension of the end away from the heat sink 10. In this way, the groove surface of the receiving groove C2 can limit the upward position of the heat conducting element 20 in the Z direction.

[0086] Optionally, the two sides of the receiving groove C2 are V-shaped, wider at the bottom and narrower at the top. The two sides of the heat-conducting component 20 along the X direction are also V-shaped. When the heat-conducting component 20 is fitted into the receiving groove C2, the heat-conducting component 20 and the receiving groove C2 form a wedge fit, ensuring a tighter connection between the heat-conducting component 20 and the heating base 70, and improving the heat conduction efficiency between the heating base 70 and the heat-conducting component 20. Specifically, when the hot end assembly 100 is locked to the connecting frame 60 by the locking member 40, the hot end assembly 100 may be subjected to an upward force relative to the heating base 70 along the Z direction. This force, combined with the aforementioned wedge fit, can further ensure that the heat-conducting component 20 and the heating base 70 are pressed tightly together, ensuring heat conduction efficiency.

[0087] In this embodiment, optionally, the heating base 70 has a limiting flange 71 at the end near the heat sink 10, and the limiting flange 71 has a limiting hole K5, which is connected to the upper end of the receiving groove C2 along the Z direction. The heat conducting element 20 includes a heat conducting body 21 and a limiting protrusion 22. The heat conducting body 21 is wedge-fitted into the receiving groove C2, and the limiting protrusion 22 is fitted into the limiting hole K5. Thus, in the first state, the limiting protrusion 22 is blocked by the limiting flange 71, and the heat conducting element 20 cannot move forward along the Y direction away from the limiting flange 71.

[0088] When it is necessary to disassemble the hot end assembly 100, first unlock the locking piece 40 to separate the locking piece 40 from the connecting frame 60, and then move the hot end assembly 100 downward along the Z direction as a whole, so that the limiting protrusion 22 of the hot end assembly 100 leaves the limiting hole K5 and enters the receiving groove C2. At this time, the heating base 70 no longer limits the heat conducting part 20, and the hot end assembly 100 can be completely disassembled from the connecting frame 60 and the heating base 70.

[0089] Optionally, the end face of the heating base 70 near the heat sink 10 along the Z direction is a guide slope P3, which is an inclined surface that slopes forward and backward along the Y direction. The guide slope P3 is set as an inclined surface to facilitate the installation of the insulation sleeve 95 (as described below) onto the heating base 70.

[0090] Optionally, the printhead 300 may also include a heat insulation element 91. The heat insulation element 91 is connected between the heating base 70 and the connecting frame 60. Optionally, the heat insulation element 91 is made of heat-insulating material, which can reduce the efficiency of heat transfer from the heating base 70 to the connecting frame 60.

[0091] Optionally, the connecting frame 60 includes a first frame plate 61 and a second frame plate 62, with one end of the second frame plate 62 connected to the first frame plate 61 and the other end connected to the heat insulation member 91. The heating base 70 is connected to the side of the heat insulation member 91 opposite to the second frame plate 62.

[0092] The first frame plate 61, the heat insulation component 91, and the heating base 70 are all located on the same side of the second frame plate 62.

[0093] The connecting bracket 60, the heat insulation component 91, and the heating base 70 form a horizontally open mounting space Q2. When the hot end assembly 100 is installed, the heat sink 10 is housed in the mounting space Q2, and the heat conduction component 20 is housed in the receiving groove C2.

[0094] Optionally, the aforementioned mounting groove C1 is formed by recessing the upper surface of the front end of the first mounting plate 61 along the Y direction. The mounting groove C1 is provided such that the front end of the first mounting plate 61 is approximately hook-shaped 63, which is used to reliably engage with the locking lever 41 of the locking member 40.

[0095] In this embodiment, optionally, the connecting frame 60 has a throat hole K6. When the hot end assembly 100 is disposed on the heating base 70 and the connecting frame 60, the throat 31 contacts the wall of the throat hole K6. Thus, the connecting frame 60 can also serve to position the throat 31.

[0096] Optionally, the connecting bracket 60, the heat insulation component 91, and the heating base 70 can be locked together using fasteners 92 (such as screws). The reason for connecting the connecting bracket 60 and the heating base 70 is as follows: If the connecting frame 60 and the heating base 70 are not connected, that is, the hot end assembly 100 is only connected to the connecting frame 60 at the heat sink 10, forming a cantilever beam structure with a long cantilever, which is unstable, especially at the weak throat 31 (located in the area between the heat sink 10 and the heat conductor 20), so the throat 31 is easily damaged and deformed. However, by connecting the connecting frame 60 and the heating base 70, and the heating base 70 is fixedly connected to the heat conductor 20, the stress on the throat 31 can be relieved, and the occurrence of damage and deformation of the throat 31 can be reduced.

[0097] In one embodiment, optionally, the connecting frame 60 can serve as a strain gauge support, its first support plate 61 can serve as a first sub-support for the strain gauge, and its second support plate 62 can serve as a second sub-support for the strain gauge.

[0098] 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 can be made of aluminum.

[0099] The lower end face of the first sub-support of the strain gauge is divided into a first lower end face P1 and a second lower end face P2 along the front-rear direction. The second lower end face P2 is located in front of the first lower end face P1 along the Y direction. A detection unit is provided on the first lower end face P1. When the hot-end assembly 100 is installed, the detection unit contacts the rear portion of the upper end face of the heat sink 10. The detection unit can detect the force exerted by the heat sink 10 on the first sub-support of the strain gauge. The measured force can be used for various purposes, such as: (1) The forming platform 510 of the 3D printer 500 may not be flat enough. In order to ensure the printing quality, the flatness of the forming platform 510 needs to be detected so as to compensate for the up and down movement of the print head 300. When measuring the flatness of the forming platform 510, the print head 300 moves down from the first horizontal position to the position where the nozzle 32 contacts the forming platform 510. At this time, the detection unit measures one of the above-mentioned forces. The print head 300 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, the movement of the print head 300 needs to be compensated. 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 component 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. (3) Used to detect the flow rate of wire material. The movement of wire material downstream will cause the hot end component 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.

[0100] Optionally, the front end of the first frame plate 61 forms a downwardly protruding top 64, the lower end surface of the non-protruding portion of the first frame plate 61 is seated as the first lower end surface P1, and the lower end surface of the top 64 is used as the second lower end surface P2.

[0101] The first lower end face P1 can contact the front part of the upper end face of the heat sink 10 when the hot end assembly 100 is installed. Since the first lower end face P1 is horizontal and flat, and the upper end face of the heat sink 10 is flat, the verticality of the nozzle 32 can be guaranteed when the hot end assembly 100 is installed.

[0102] In another embodiment, the connecting frame 60 may not serve as a strain gauge support; in this case, the stress detection unit can be placed in other suitable locations.

[0103] In this embodiment, the printhead 300 further includes a heating element 93. The heating element 93 is, for example, an electrothermal element capable of generating heat when energized. The heating element 93 may be disposed on the side of the heating base 70 away from the heat-conducting element 20. Optionally, the heating element 93 is generally in the form of a sheet.

[0104] Optionally, the printhead 300 may further include a pressing member 80, which is detachably snapped onto the heating base 70 and can press the heating element 93 against the side of the heating base 70 away from the heat-conducting member 20. In this way, the heating element 93 can be in close contact with the heating base 70, allowing the heat from the heating element 93 to be efficiently transferred to the heating base 70. In this embodiment, the heating element 93 is fixed on the heating base 70, and when disassembling the hot end assembly 100, the heating element 93 does not need to be removed simultaneously, thus eliminating the need to unplug the power connector of the heating element 93, making the hot end assembly 100 easy to install and remove.

[0105] Optionally, the heating base 70 is provided with snap-fit ​​grooves C3 on both sides. The pressing member 80 includes a back plate 81 and two side plates 82, which are connected in a shape. The ends of the two side plates 82 facing away from the back plate 81 are folded inward to form inward folded portions 83. The back plate 81 is provided with an elastic tongue plate 84 extending towards one side of the side plate 82. During installation, the two inward folded portions 83 of the pressing member 80 are snapped into the two snap-fit ​​grooves C3 respectively. The back plate 81 is located on the side of the heating base 70 facing away from the heat-conducting member 20, and the elastic tongue plate 84 on the back plate 81 elastically presses the heating element 93 against the heating base 70, ensuring a reliable thermal connection between the heating element 93 and the heating base 70.

[0106] Optionally, the snap-fit ​​groove C3 extends along the Z direction to penetrate the lower end face of the heating base 70, so that the inner fold 83 of the pressing member 80 can snap into the snap-fit ​​groove C3 from bottom to top.

[0107] In this embodiment, optionally, the printhead 300 may further include a temperature sensing element 94. The temperature sensing element 94 is used to detect temperature. For example, the temperature sensing element 94 includes a thermistor, which is used to detect temperature. The temperature sensing element 94 may be disposed on the heating base 70. For example, the heating base 70 has a mating hole K4 on its side, and the sensing head of the temperature sensing element 94 is mated to the mating hole K4 and pressed against the heating base 70 by the pressing member 80, so that the temperature sensing element 94 and the heating base 70 are thermally coupled. In this embodiment, the temperature sensing element 94 is fixed on the heating base 70, and the temperature sensing element 94 does not need to be removed when disassembling the hot end assembly 100. Therefore, it is not necessary to unplug the power connector of the temperature sensing element 94, and the hot end assembly 100 is easy to disassemble and assemble.

[0108] In this embodiment, optionally, the printhead 300 also includes a heat insulation sleeve 95. The heat insulation sleeve 95 is fitted over the heating element 93 and encloses at least a portion of the heat-conducting component 20, the heating element 93, the temperature sensing element 94, and other components to reduce temperature loss at the heat-conducting component 20. The heat insulation sleeve 95 may be made of silicone material. When disassembling the hot-end assembly 100, the heat insulation sleeve 95 can be removed along with it. The heat insulation sleeve 95 and the hot-end assembly 100 can be detachably connected to facilitate the separate replacement of the heat insulation sleeve 95. Furthermore, the heat insulation sleeve 95 can reduce the risk of burns from high temperatures when the user installs or removes the hot-end assembly 100. When it is necessary to disassemble the hot-end assembly 100, it may be necessary to remove the heat insulation sleeve 95 first.

[0109] When installing the hot-end assembly 100, place the throat 31 into the throat hole K6, place the locking member 40 in the mounting groove C1, place the heat-conducting member 20 in the receiving groove C2, and then proceed along... Figure 4 Rotating the handle 50 clockwise as shown allows for the installation of the hot-end assembly 100. Removing the hot-end assembly 100 involves the reverse operation, which will not be described further here.

[0110] In some embodiments, there may be a plate-like structure (not shown in the figure) above the mounting slot C1. When disassembling, the plate-like structure abuts against the locking member 40, and the plate-like structure presses the hot end assembly 100 downward, thereby saving effort for the user.

[0111] Embodiments of this application also provide a printhead 300, which includes a connector 60 and a hot-end assembly 100. The connector 60 has a mounting groove C1. The hot-end assembly 100 includes a heat sink 10, a heat conductor 20, a throat 31, a nozzle 32, and a locking member 40. The throat 31 connects the heat sink 10 and the heat conductor 20, the nozzle 32 connects to the heat conductor 20, and the locking member 40 is disposed on the heat sink 10. The locking member 40 has a first state of being connected to the mounting groove C1 and a second state of being separated from the mounting groove C1.

[0112] In one embodiment, one end of the locking member 40 is rotatably disposed on the heat sink 10 about the first axis L1, and the locking member 40 is in a first state or a second state by rotation.

[0113] In one embodiment, the locking member 40 includes a locking rod 41 and at least one side rod 42, each side rod 42 being connected to the locking rod 41. The locking member 40 is disposed on the heat sink 10 via at least one side rod 42. When the locking member 40 is in a first state, the locking rod 41 is connected to the mounting groove C1. When the locking member 40 is in a second state, the locking rod 41 is separated from the mounting groove C1.

[0114] In one embodiment, the hot end assembly 100 further includes a handle 50, which is rotatably disposed on the heat sink 10 about a second axis L2. The handle 50 has a second pivot hole K2, which extends along the direction of the first axis L1. The second pivot hole K2 is connected to one end of the locking member 40. The first axis L1 and the second axis L2 are arranged parallel and spaced apart.

[0115] In one embodiment, the heat sink 10 includes a heat sink body 11 and a protrusion 12. The protrusion 12 is fixed to one side of the heat sink body 11 in the horizontal direction, and the handle 50 is rotatably disposed on the protrusion 12 about the second axis L2.

[0116] In one embodiment, the heat sink 10 includes a heat sink body 11 and a protrusion 12, the protrusion 12 protruding from the heat sink body 11. The heat sink body 11 includes a heat sink portion 11a and a plurality of fins 11b, the heat sink portion 11a extending along a first direction Z1, and the plurality of fins 11b distributed on one or both sides of the heat sink portion 11a along a second direction Y1; the second direction Y1 is perpendicular to the first direction Z1. The heat sink 10 also includes a carrier plate portion 13, the carrier plate portion 13 being connected between at least two fins 11b located on the same side; the protrusion 12 is connected to the carrier plate portion 13.

[0117] In one embodiment, the printhead 300 further includes a heating seat 70, which is connected to the connecting frame 60. The heating seat 70 is provided with a receiving groove C2. When the locking member 40 is in the first state, the heat-conducting member 20 is at least partially received in the receiving groove C2, and the size of the receiving groove C2 at the end near the heat sink 10 is smaller than the size of the end away from the heat sink 10.

[0118] Embodiments of this application also provide a 3D printer, which includes a forming platform 510 and a print head 300. The print head 300 includes a connecting frame 60 and a hot end assembly 100. The connecting frame 60 is movable relative to the forming platform 510. The hot end assembly 100 includes a heat sink 10, a heat conductor 20, a throat 31, a nozzle 32, and a locking member 40. The throat 31 connects the heat sink 10 and the heat conductor 20. The nozzle 32 connects to the heat conductor 20. The locking member 40 is movably disposed on the heat sink 10. The locking member 40 has a first state in which the hot end assembly 100 is connected to the connecting frame 60, and a second state in which the hot end assembly 100 is separated from the connecting frame 60.

[0119] In one embodiment, the locking member 40 extends along at least a portion of the annular shape, defining a locking space Q1. When the locking member 40 is in a first state, at least a portion of the connecting bracket 60 is located on one side of the locking space Q1, and at least another portion of the connecting bracket 60 is located on the other side of the locking space Q1.

[0120] In one embodiment, the locking member 40 rotates to change the relative position of the connecting frame 60 and the locking space Q1.

[0121] In one embodiment, the hot end assembly 100 further includes a handle 50, which is rotatably disposed on the heat sink 10 and rotatably connected to the locking member 40.

[0122] In one embodiment, the heat sink 10 includes a plurality of fins 11b and a protrusion 12, the protrusion 12 protruding from at least a portion of the fins 11b, and a locking member 40 movably disposed on the protrusion 12.

[0123] In one embodiment, the printhead 300 further includes a heating seat 70, which is fixedly connected to the connecting frame 60. The heating seat 70 is provided with a receiving groove C2, which is used to receive at least part of the heat-conducting element 20. The upper end of the receiving groove C2 is smaller than the lower end.

[0124] 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 hot-end assembly, characterized in that, include: Heat dissipation components; A heat-conducting component, wherein the heat-conducting component and the heat-dissipating component are spaced apart; A throat, a portion of which is connected to the heat-conducting element, and another portion of which is connected to the heat-dissipating element; A nozzle, which is connected to the throat and is located on the side of the heat-conducting component away from the heat-dissipating component; as well as A locking element is movably connected to the heat sink.

2. The hot-end assembly according to claim 1, characterized in that, One end of the locking member is rotatable about a first axis relative to the heat sink.

3. The hot-end assembly according to claim 2, characterized in that, The locking component includes a locking rod, a first side rod, and a second side rod. The first side rod and the second side rod are respectively connected to the two ends of the locking rod. The ends of the first side rod and the second side rod away from the locking rod are rotatable about the first axis relative to the heat sink.

4. The hot-end assembly according to claim 2, characterized in that, Also includes: A handle is rotatably disposed on the heat sink about a second axis, and one end of the locking member is rotatably disposed on the handle about a first axis, wherein the first axis and the second axis are parallel.

5. The hot-end assembly according to claim 4, characterized in that, The first axis and the second axis are spaced apart.

6. The hot-end assembly according to claim 1, characterized in that, The heat sink includes a heat sink body and a protrusion. The protrusion protrudes from the heat sink body and has a first pivot hole for rotating the locking component.

7. The hot-end assembly according to claim 6, characterized in that, The heat dissipation body includes a heat dissipation section and multiple fins, the multiple fins being distributed at intervals on one or more sides of the heat dissipation section; The heat sink further includes a carrier plate portion, which is connected to at least two of the fins located on the same side; The protrusion is connected to the carrier plate and protrudes from the side of the carrier plate away from the heat dissipation part.

8. A printhead, characterized in that, include: Connecting frame, wherein the connecting frame is provided with a mounting groove; as well as, A hot-end assembly includes a heat sink, a heat conductor, a throat, a nozzle, and a locking member. The throat connects the heat sink and the heat conductor, the nozzle connects to the heat conductor, and the locking member is disposed on the heat sink. The locking member has a first state of being connected to the mounting groove and a second state of being separated from the mounting groove.

9. The printhead according to claim 8, characterized in that, One end of the locking member is rotatably disposed on the heat sink about a first axis, and the locking member is in the first state or the second state by the rotation.

10. The printhead according to claim 8, characterized in that, The locking member includes a locking rod and at least one side rod, each of the side rods being connected to the locking rod. The locking member is disposed on the heat sink via the at least one side rod. When the locking member is in the first state, the locking rod is connected to the mounting slot. When the locking member is in the second state, the locking rod is separated from the mounting slot.

11. The printhead according to claim 9, characterized in that, The hot-end assembly also includes: A handle is rotatably disposed on the heat sink about a second axis. The handle has a second pivot hole that extends along the first axis and is connected to one end of the locking member. The first axis and the second axis are arranged parallel and spaced apart.

12. The printhead according to claim 11, characterized in that, The heat sink includes a heat sink body and a protrusion. The protrusion is fixed to one side of the heat sink body in the horizontal direction, and the handle is rotatably disposed on the protrusion about a second axis.

13. The printhead according to claim 8, characterized in that, The heat dissipation component includes a heat dissipation body and a protrusion, wherein the protrusion protrudes from the heat dissipation body; The heat dissipation body includes a heat dissipation section and multiple fins. The heat dissipation section extends along a first direction, and the multiple fins are distributed on one or both sides of the heat dissipation section along a second direction. The second direction is perpendicular to the first direction. The heat sink further includes a carrier plate portion connected between at least two fins located on the same side; the protrusion is connected to the carrier plate portion.

14. The printhead according to claim 8, characterized in that, Also includes: A heating base is connected to the connecting bracket, and the heating base is provided with a receiving groove; when the locking member is in the first state, the heat-conducting member is at least partially received in the receiving groove, and the size of the receiving groove at the end near the heat dissipation member is smaller than the size of the end away from the heat dissipation member.

15. A three-dimensional printer, characterized in that, include: Molding platform; as well as, A printhead includes a connector and a hot end assembly. The connector is movable relative to the forming platform. The hot end assembly includes a heat sink, a heat conductor, a throat, a nozzle, and a locking member. The throat connects the heat sink and the heat conductor, and the nozzle connects to the heat conductor. The locking member is movably disposed on the heat sink. The locking member has a first state in which the hot end assembly is connected to the connector, and a second state in which the hot end assembly is separated from the connector.

16. The three-dimensional printer according to claim 15, characterized in that, The locking member extends along at least a portion of the annular shape, defining a locking space. When the locking member is in the first state, at least a portion of the connecting bracket is located on one side of the locking space, and at least another portion of the connecting bracket is located on the other side of the locking space.

17. The three-dimensional printer according to claim 16, characterized in that, The locking element rotates to change the relative position of the connecting frame and the locking space.

18. The three-dimensional printer according to claim 15, characterized in that, The hot-end assembly also includes: A handle is rotatably disposed on the heat sink and is rotatably connected to the locking member.

19. The three-dimensional printer according to claim 15, characterized in that, The heat sink includes multiple fins and a protrusion, the protrusion protruding from at least a portion of the fins, and the locking member being movably disposed on the protrusion.

20. The three-dimensional printer according to claim 15, characterized in that, The printhead also includes: A heating base is fixedly connected to the connecting frame. The heating base is provided with a receiving groove for accommodating at least part of the heat-conducting component. The upper part of the receiving groove is smaller than the lower part.

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