3D printer

Abstract

The application relates to the field of 3D printing technology, aims to solve the technical problems that some known 3D printers have complex material changing steps and general printing quality, and provides a 3D printer which comprises a machine box, a printing head, a remote extruder and a material guide pipe. The machine box has a first end and a second end which are arranged at intervals along the Y-axis direction. The printing head is located in the machine box. The remote extruder is installed outside the machine box, the remote extruder is arranged at the second end, and the remote extruder is used for conveying a wire material and controlling the pressure output by the printing head. The material guide pipe is connected between the feeding end of the printing head and the discharging end of the remote extruder, and the material guide pipe has a channel for the wire material to pass through. The application has the beneficial effects of improving the material changing convenience and improving the printing quality.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and more specifically, to 3D printers. Background Technology

[0002] 3D printing technology, especially fused deposition modeling (FDM), typically involves heating and melting filaments through an extrusion mechanism and depositing them layer by layer to form a three-dimensional object.

[0003] Some known 3D printers have issues with complex material changing procedures and generally poor print quality during printing operations. Summary of the Invention

[0004] This application provides a 3D printer to address some known technical problems with 3D printers, such as complex material changing steps and generally poor print quality.

[0005] The embodiments of this application are implemented as follows: This application provides a 3D printer, including a chassis, a print head, a remote extruder, and a feed tube. The chassis has a first end and a second end spaced apart along the Y-axis. The print head is located inside the chassis. The remote extruder is mounted outside the chassis and is located at the second end. The remote extruder is used to feed filament and control the pressure output by the print head. The feed tube connects the feed end of the print head to the discharge end of the remote extruder, and has a channel for the filament to pass through.

[0006] According to this embodiment of the 3D printer, the remote extruder is installed outside the chassis, which isolates the remote extruder from the internal environment of the chassis, thus providing a better heat dissipation environment and preventing it from being affected by the high temperature of the print head. This also facilitates filament replacement for the user, improving the convenience of filament replacement. Simultaneously, the remote extruder's location at the second end facilitates the layout of the feed tube. When the print head performs the printing action inside the chassis, the feed tube guides the filament to the print head. The feed tube guides the filament, reducing its bending amplitude and conveying resistance. This transmits the extrusion force from the remote extruder to the print head, resulting in smoother resistance fluctuations in the filament and suppressing sudden changes in filament feeding resistance caused by path changes. This improves the stability of the extrusion force at the print head's output end, thereby improving print quality. Furthermore, since the print head does not require an extrusion structure, its weight and moment of inertia can be reduced. This allows the print head to achieve higher speeds and accelerations to improve printing efficiency and also reduces quality problems caused by print head wobbling, further improving print quality. Attached Figure Description

[0007] 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.

[0008] Figure 1 This is a three-dimensional structural diagram of a 3D printer according to an embodiment of this application.

[0009] Figure 2 This is a schematic diagram of the three-dimensional structure of a 3D printer after removing the top cover, according to an embodiment of this application.

[0010] Figure 3 This is one of the exploded structural diagrams of a distal extruder according to an embodiment of this application.

[0011] Figure 4 This is a front view of a distal extruder according to an embodiment of this application after the cover plate has been removed.

[0012] Figure 5 This is a three-dimensional structural diagram of a distal extruder after removing the cover plate and extrusion support according to an embodiment of this application.

[0013] Figure 6 This is a second exploded structural diagram of a distal extruder according to an embodiment of this application.

[0014] Figure 7 This is a three-dimensional structural diagram of a distal extruder after the cover plate has been removed, according to an embodiment of this application.

[0015] Figure 8 This is a schematic diagram of the structure of a cover plate according to an embodiment of this application.

[0016] Figure 9 This is one of the structural schematic diagrams of a material breakage detection component and an extrusion bracket according to an embodiment of this application.

[0017] Figure 10 This is a second schematic diagram of the structure of the material breakage detection component and the extrusion bracket according to an embodiment of this application.

[0018] Figure 11 This is a partial structural diagram of a 3D printer according to an embodiment of this application.

[0019] Figure 12 for Figure 11 A schematic diagram of the exploded structure of a 3D printer.

[0020] Figure 13 for Figure 11 A schematic diagram of the exploded structure of a 3D printer from another perspective.

[0021] Figure 14 This is a schematic diagram of the structure of the rear side panel according to an embodiment of this application.

[0022] Figure 15 This is a structural schematic diagram of the rear panel, material rack, and material box according to an embodiment of this application.

[0023] Figure 16 This is a schematic diagram of the structure of a 3D printer according to an embodiment of this application after removing the bottom shell, door, top cover and rear side panel.

[0024] Figure 17 This is a schematic diagram of the structure of a first driver, a second driver, a first belt, a second belt, a mounting base, and a printhead according to an embodiment of this application.

[0025] Figure 18 This is an exploded view of the first driver, second driver, first belt, and second belt according to an embodiment of this application.

[0026] Figure 19 This is an exploded view of the top frame, first driver, second driver, first belt, second belt, mounting base, and printhead according to an embodiment of this application.

[0027] Figure 20 This is an exploded view of the first tensioning component according to an embodiment of this application.

[0028] Figure 21 This is a schematic diagram of the structure of a third driver, a third belt, a third tensioning assembly, a first transmission assembly, and a second transmission assembly according to an embodiment of this application.

[0029] Figure 22 This is a schematic diagram of the structure of the base, third driver, third tensioning component and third belt according to an embodiment of this application.

[0030] Figure 23 This is an exploded view of a printing station according to an embodiment of this application.

[0031] Figure 24 This is a schematic diagram of the chassis and air purification components of a 3D printer according to an embodiment of this application.

[0032] Figure 25 This is an exploded structural diagram of the chassis and air purification components of a 3D printer according to an embodiment of this application.

[0033] Figure 26 This is an exploded structural diagram of an air purification component according to an embodiment of this application.

[0034] Figure 27 This is a three-dimensional structural diagram of a 3D printer according to an embodiment of this application after the top cover has been removed, viewed from another perspective.

[0035] Figure 28 This is an exploded view of the printhead according to an embodiment of this application.

[0036] Figure 29 This is a partial structural diagram of a 3D printer according to an embodiment of this application.

[0037] Figure 30 This is a partial cross-sectional view of a 3D printer according to an embodiment of this application.

[0038] Figure 31 This is a schematic diagram of the structure of a printhead and transfer device according to an embodiment of this application.

[0039] Figure 32 This is a schematic diagram of the exploded structure of a printhead according to an embodiment of this application from another perspective.

[0040] Figure 33 This is a schematic diagram of the exploded structure of a printhead according to an embodiment of this application from another perspective.

[0041] Figure 34 This is an exploded structural diagram of the second mounting base and hot end assembly according to an embodiment of this application.

[0042] Figure 35 This is an exploded structural diagram of the second mounting base and hot end assembly according to an embodiment of this application from another perspective.

[0043] Figure 36 This is a schematic diagram of the structure of a hot-end component and a strain detection element according to an embodiment of this application.

[0044] Figure 37 This is a schematic diagram of the hot end assembly, mounting base, and strain detection element according to an embodiment of this application. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] 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 in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] The following describes some embodiments of this application in detail. Unless otherwise specified, the embodiments and features described below can be combined with each other.

[0049] See Figures 1 to 2 This embodiment provides a 3D printer 1000, including a chassis 300, a print head 100, a remote extruder 200, and a feed tube 192. The chassis 300 has a first end 300a and a second end 300b spaced apart along the Y-axis. The print head 100 is located inside the chassis 300. The remote extruder 200 is mounted outside the chassis 300 and is located at the second end 300b. The remote extruder 200 is used to convey filament 2000 and control the pressure output by the print head 100. The feed tube 192 connects the feed end 143 of the print head 100 and the discharge end of the remote extruder 200, and has a channel for the filament 2000 to pass through.

[0050] According to the 3D printer 1000 of this embodiment, the remote extruder 200 is installed outside the chassis 300, which isolates the remote extruder 200 from the internal environment of the chassis 300, thereby providing a better heat dissipation environment and preventing it from being affected by the high temperature of the print head 100. It also facilitates the user in replacing the filament 2000, improving the convenience of filament 2000 replacement. At the same time, the remote extruder 200 is located at the second end 300b, which facilitates the arrangement of the feed tube 192 and plays a balancing role on the weight of the chassis 300 at the first end 300a, bringing the center of gravity of the chassis 300 closer to the middle in the Y-axis direction. This reduces the risk of the 3D printer 1000 tipping over during operation and reduces the risk of the 3D printer 1000 overturning due to a shift in the center of gravity during transportation. When the printhead 100 performs printing within the housing 300, the channel of the feed tube 192 guides the filament 2000 to the printhead 100. The feed tube 192 guides the filament 2000's transmission path, reducing its bending amplitude and conveying resistance. This allows the extrusion force from the distal extruder 200 to be transmitted to the printhead 100, resulting in smoother resistance fluctuations for the filament 2000. This suppresses sudden changes in filament feeding resistance caused by path changes, improves the stability of the extrusion force at the printhead 100's output end, and thus improves print quality. Furthermore, since the printhead 100 does not require an extrusion structure, its weight and moment of inertia can be reduced. This allows the printhead 100 to achieve higher speeds and accelerations to improve printing efficiency, while also reducing quality issues caused by printhead 100 wobbling, thereby improving print quality.

[0051] In some embodiments, the 3D printer 1000 further includes a transfer device 400. The transfer device 400 is mounted in the housing 300 and is driveably connected to the print head 100. A remote extruder 200 is located in the housing 300 and spaced apart from the print head 100. Thus, the transfer device 400 only needs to drive the print head 100, thereby reducing the load requirement of the transfer device 400 and reducing the weight and size of the drive source (such as a motor) of the transfer device 400, which is beneficial for achieving a lightweight design of the 3D printer 1000. At the same time, the motion accuracy of the transfer device 400 is also improved, reducing the vibration amplitude of the transfer device 400 during high-speed movement, effectively reducing vibration marks on the surface of the printed model, and improving printing accuracy and surface quality. Furthermore, the print head 100 can eliminate the extrusion structure, reducing the overall weight and size of the print head 1000, which can reduce the size of the housing 300, thereby reducing the weight of the 3D printer 1000 and improving the space utilization of the 3D printer 1000.

[0052] In some embodiments, see Figure 2The second end 300b is located at the rear of the housing 300, facilitating user maintenance of the remote extruder 200. Furthermore, the connecting cable of the remote extruder 200 can be fixed to the housing 300 without needing to move with it, which not only reduces the risk of cable wear but also simplifies the wiring structure. In other embodiments, the remote extruder 200 can also be mounted on the side or bottom of the housing 300.

[0053] Optionally, the main control board of the 3D printer 1000 is located at the rear of the chassis 300. This can further shorten the cable length, reduce costs and signal interference, and utilize the space corresponding to the main control board to accommodate part of the structure of the remote extruder 200.

[0054] In some embodiments, the distal extruder 200 may be connected to the printhead 100 via one or more sections of feed tubes, at least a portion of which is a tubular component capable of arcuate bending and exhibiting a low rate of expansion and contraction. The feed tubes may be Teflon tubing, etc. See also Figure 3 and Figure 4 The remote extruder 200 includes a housing 210, a drive wheel 220, a transmission component 230, and a driven wheel 240. The housing 210 is configured to be spaced apart from the printhead 100; that is, when the transfer device 400 drives the printhead 100 to move, the housing 210 does not move with the printhead 100. The printhead 100 may be fixed to the power output end of the transfer device 400. The housing 210 may be fixedly mounted to the housing 300 by screws or clips, or partially integrated into the housing 300. The drive wheel 220 is rotatably mounted on the housing 210. The transmission component 230 is movably connected to the housing 210, and the operating end 230a of the transmission component 230 is located on the outside of the housing 210. Driven wheel 240 is rotatably connected to transmission member 230 and is correspondingly arranged with drive wheel 220. A clamping area Q4 for clamping wire 2000 is defined between driven wheel 240 and drive wheel 220. Driven wheel 240 is configured to move away from drive wheel 220 under the drive of transmission member 230 so that wire 2000 can pass into clamping area Q4.

[0055] Thus, by operating the operating end 230a of the transmission component 230 on the outside of the housing 210, the user can drive the driven wheel 240 away from the driving wheel 220, increasing the size of the clamping area Q4. This facilitates the threading of the wire 2000 through the clamping area Q4, improving the ease of threading the wire 2000. Of course, when the transmission component 230 drives the driven wheel 240 closer to the driving wheel 220, the driven wheel 240 can cooperate with the driving wheel 220 to clamp the wire 2000. After the user releases the operating end 230a, the transmission component 230 can drive the driven wheel 240 closer to the driving wheel 220 and clamp the wire 2000. Through the relative rotation of the driving wheel 220 and the driven wheel 240, the wire 2000 can be driven towards the print head 100 for printing, or the wire 2000 can be pulled out of the print head 100 for replacement with other wires 2000. Therefore, the remote extruder 200 of this embodiment can improve the ease of changing the wire 2000 and improve the ease of operation for users.

[0056] In some embodiments, the housing 210 includes a light-transmitting portion corresponding to the clamping area Q4. This allows the user to visually observe the transfer status of the wire 2000 within the clamping area Q4 in the third receiving slot 2111 from the outside. For example, during printing, the user can check at any time whether the wire 2000 moves normally within the clamping area Q4 and whether there are signs of slippage, wear, or breakage.

[0057] In some embodiments, see Figure 3 The housing 210 includes an outer shell 211 and a cover plate 212. The outer shell 211 has a third receiving groove 2111. The driving wheel 220, the driven wheel 240, and some transmission components 230 are all received in the third receiving groove 2111. The third receiving groove 2111 is open on one side along the axial direction of the driving wheel 220. The cover plate 212 covers the third receiving groove 2111 and is detachably connected to the outer shell 211. The fixed end 230b of the transmission component 230 is rotatably connected to the outer shell 211. Thus, after removing the cover plate 212, the driving wheel 220 and the driven wheel 240 can be exposed, facilitating troubleshooting of the remote extruder 200 and improving ease of use. Rotating the transmission component 230 to the outer shell 211 allows the remote extruder 200 to be installed as a single unit, improving the assembly convenience of the 3D printer 1000.

[0058] The fixed end 230b and the outer casing 211 can be movably connected by a direct rotatable connection or an indirect rotatable connection. For example, the fixed end 230b can be rotatably connected to the outer casing 211 via a rotating shaft.

[0059] In other embodiments, the transmission component 230 and the housing 211 can also be connected by ball joint connection, sliding connection or other connection methods.

[0060] Optionally, the fixed end 230b and the operating end 230a of the transmission member 230 are spaced apart along their length.

[0061] Optionally, the outer casing 211 is fixedly mounted on the outside of the chassis 300. The third receiving slot 2111 is open in a direction away from the chassis 300. This further improves ease of operation.

[0062] In some embodiments, see Figure 5 The outer casing 211 has a clearance opening 2112, which connects to the third receiving slot 2111. The transmission component 230 extends from the clearance opening 2112, and the operating end 230a is located outside the outer casing 211.

[0063] In some embodiments, the cover plate 212 and / or the outer shell 211 are made of a light-transmitting material. This facilitates observation of the operation of the components inside the shell 210. In this embodiment, the cover plate 212 and / or the outer shell 211 constitute the light-transmitting area of ​​the shell 210. The light-transmitting material can be polycarbonate or acrylic. Optionally, the light transmittance of the light-transmitting material is greater than 80%.

[0064] In some embodiments, see Figure 6 The housing 210 also includes a third latching portion 213 and a fourth latching portion 214. The third latching portion 213 is located on the side of the third receiving groove 2111, and the fourth latching portion 214 is located on the cover plate 212. The third latching portion 213 and the fourth latching portion 214 engage in a latching fit. This improves the ease of disassembly and reassembly of the housing 210 and the cover plate 212. The third latching portion 213 and the fourth latching portion 214 can be a combination of a buckle and a hole, or a combination of an elastic hook and a step, etc. In other embodiments, the housing 210 and the cover plate 212 can also be detachably fitted by magnetic attraction. Optionally, a mark 2121 is provided on the outer side of the cover plate 212 to indicate the direction of sliding open and closed of the cover plate 212. This facilitates user operation.

[0065] Optionally, the identifier 2121 is a groove or protrusion on the side surface of the cover plate 212 opposite to the third receiving groove 2111. The identifier 2121 may be configured as a single arrow or multiple arrows arranged side by side.

[0066] In some embodiments, see Figure 4 , Figures 6 to 8 The cover plate 212 extends along the direction of the clamping area Q4 ( Figure 4The cover plate 212 is slidably connected to the housing 211 in the vertical direction. A third latching portion 213 has a first latching groove 2131, and a fourth latching portion 214 engages with the first latching groove 2131, limiting the cover plate 212 to the housing 211 along the extension direction of the clamping area Q4. The housing 210 has operating space on both sides along the extension direction of the clamping area Q4, thereby improving the ease of installation and removal of the cover plate 212 and reducing the risk of interference. Furthermore, during the movement of the cover plate 212, the first latching groove 2131 and the fourth latching portion 214 can be engaged and disengaged, further improving the ease of installation and removal.

[0067] In some embodiments, see Figure 4 and Figure 6 The remote extruder 200 also includes a third elastic element 263, which is clamped within the housing 210. The third elastic element 263 is used to abut against the transmission element 230, giving it a tendency to drive the driven wheel 240 into the clamping area Q4. Thus, when there is wire material 2000 in the clamping area Q4, the third elastic element 263 applies an elastic force to the driven wheel 240 to ensure that the driven wheel 240 presses against the wire material 2000 against the driving wheel 220, ensuring the friction between the wire material 2000 and the driven wheel 240 and the driving wheel 220, and reducing the risk of wire material 2000 slipping during transport.

[0068] Optionally, the third elastic element 263 can be a variety of elastic components such as a compression spring, torsion spring, tension spring, or elastic column.

[0069] In some embodiments, see Figure 6 The transmission component 230 includes a rotating part 231, a second abutting part 232, and an operating part 233. The rotating part 231 is connected to the housing 210, and the driven wheel 240 is rotatably connected to the rotating part 231. The operating part 233 is connected to the rotating part 231 through the second abutting part 232 and is located on the outside of the housing 210. The two ends of the third elastic member 263 are respectively connected to the housing 210 and the second abutting part 232.

[0070] The operating part 233 is the operating end 230a. The rotating part 231 is the fixed end 230b. The rotating part 231 is rotatably connected to the housing 210.

[0071] In some embodiments, see Figure 5 and Figure 6The remote extruder 200 also includes a feed driver 281. The feed driver 281 is mounted in the housing 300. The power output end of the feed driver 281 is connected to the drive wheel 220, and the feed driver 281 drives the drive wheel 220 to rotate. This improves the installation stability of the feed driver 281, thereby improving the reliability of torque transmission at its power output end. The feed driver 281 can be directly mounted in the housing 300. In another embodiment, the housing 210 can be fixedly mounted in the housing 300, and the feed driver 281 is mounted in the housing 210, thus indirectly mounting in the housing 300.

[0072] In some embodiments, see Figure 5 and Figure 6 The remote extruder 200 also includes a first drive gear 282 and a second drive gear 283. A feed driver 281 is connected to the housing 211. The first drive gear 282 is located within a third receiving groove 2111. The output shaft of the feed driver 281 passes through the housing 211 and is connected to the first drive gear 282. The second drive gear 283 is located within the third receiving groove 2111 and meshes with the first drive gear 282. A drive wheel 220 is connected to the second drive gear 283 and is coaxially arranged with it. Thus, the feed driver 281 drives the first drive gear 282 and the second drive gear 283 to rotate, thereby driving the drive wheel 220 to rotate, which in turn drives the driven wheel 240 to rotate, achieving relative rotation between the drive wheel 220 and the driven wheel 240, and thus conveying the wire 2000.

[0073] In some embodiments, see Figures 3 to 5 The distal extruder 200 also includes a rotating shaft 284. One end of the rotating shaft 284 is rotatably connected to the extrusion bracket 250, and the other end of the rotating shaft 284 is rotatably connected to the housing 211. The second transmission gear 283 and the drive wheel 220 are fixed to the rotating shaft 284 at intervals along the axial direction of the rotating shaft 284.

[0074] Optionally, see Figure 3 The distal extruder 200 also includes a bearing 285. The bearing 285 is disposed on the extrusion bracket 250. One end of the rotating shaft 284 is rotatably fitted to the bearing 285. The drive wheel 220 is disposed on the side of the bearing 285 away from the cover plate 212, and the second transmission gear 283 is fixedly connected to the rotating shaft 284 and is located between the bearing 285 and the drive wheel 220 along the axial direction of the rotating shaft 284.

[0075] In some embodiments, see Figure 4 , Figure 7 and Figure 9The distal extruder 200 also includes an extrusion bracket 250, which is disposed in the housing 210 and defines a transport channel Q5 for transporting the wire 2000. A drive wheel 220 is rotatably connected to the extrusion bracket 250 and located on one side of the transport channel Q5, while a driven wheel 240 and a transmission component 230 are located on the other side of the extrusion bracket 250. The transport channel Q5 connects to a clamping area Q4. Thus, after the wire 2000 passes through the clamping area Q4 via the transport channel Q5, it is clamped by the drive wheel 220 and the driven wheel 240, and then transported under the drive of the drive wheel 220 and the driven wheel 240. The extrusion bracket 250 improves the guiding effect of the wire 2000 and reduces the risk of interference between the wire 2000 and other parts within the extruder.

[0076] In some embodiments, see Figure 7 and Figure 9 The remote extruder 200 also includes a feed connector 261, which is connected to one end of the extrusion bracket 250 and communicates with the transmission channel Q5. The feed connector 261 is used to connect to the mounting assembly 600 through another feed tube to receive the wire material 2000 conveyed by the mounting assembly 600.

[0077] In some embodiments, see Figure 7 and Figure 9 The remote extruder 200 also includes a discharge connector 262, which connects to the other end of the extrusion bracket 250 and is connected to the transmission channel Q5. The discharge connector 262 can be easily connected to a feed tube to transmit the wire 2000 to the print head 100 through the feed tube.

[0078] In some embodiments, see Figure 7 The extrusion bracket 250 has a second slot 251 at one end near the discharge connector 262. (See also...) Figure 8 The cover plate 212 has a locking protrusion 215 at one end near the discharge connector 262. The locking protrusion 215 engages with the second locking groove 251 and is used to limit the cover plate 212 to the housing 211 in the direction from the feed connector 261 to the discharge connector 262. Thus, when the cover plate 212 is installed on the housing 211, the engagement protrusion 215 and the second locking groove 251 can limit the engagement protrusion 215 through the housing 211, thereby improving the connection reliability between the cover plate 212 and the housing 211.

[0079] Optionally, see Figure 7The housing 210 also includes a limiting part 216, which connects to the third engaging part 213. The limiting part 216 abuts against the fourth engaging part 214 and limits the cover plate 212 to the housing 211 in the direction from the discharge connector 262 to the feed connector 261. Thus, by the engagement of the limiting part 216 with the fourth engaging part 214 and the engagement of the engaging protrusion 215 with the second slot 251, the cover plate 212 can be limited to the housing 211 in the conveying direction of the material 2000, further improving the connection reliability between the cover plate 212 and the housing 211.

[0080] Optionally, see Figure 7 An observation hole 252 is provided on the extrusion bracket 250. The observation hole 252 is set to correspond to the clamping area Q4. The observation hole 252 is used to expose the wire material 2000 in the clamping area Q4.

[0081] In some embodiments, see Figure 6 The remote extruder 200 also includes a material breakage detection element 271. The material breakage detection element 271 is connected to the extrusion bracket 250 and has a first position located outside the transmission channel Q5 under the pressure of the wire 2000 and a second position extending into the transmission channel Q5. This allows for the determination of the material breakage status of the wire 2000.

[0082] Optionally, see Figure 9 and Figure 10The remote extruder 200 also includes a control board 272, a pivot 273, a reset member 274, and a sensor 275. The control board 272 is fixedly mounted on the extrusion bracket 250. The control board 272 has a through-hole 2721. A material breakage detection member 271 is rotatably connected to the control board 272 near the extrusion bracket 250 via the pivot 273. The material breakage detection member 271 includes an intrusion portion 2711 and a detection portion 2712 spaced apart. The intrusion portion 2711 is used to intrude into the transport channel Q5. The detection portion 2712 passes through the through-hole 2721. The reset member 274 connects the control board 272 and the material breakage detection member 271. The reset member 274 applies a force to the material breakage detection member 271, causing the intrusion portion 2711 to tend to intrude into the transport channel Q5. The sensor 275 is located on the side of the control board 272 opposite to the extrusion bracket 250. The sensor 275 is used to detect the detection portion 2712. When the material breakage detection element 271 is in the first position, the intrusion part 2711 overcomes the force of the reset element 274 under the force of the wire 2000, causing the material breakage detection element 271 to rotate around the pivot 273, and the detection part 2712 to pass through the through hole 2721 to the other side of the control board 272, where the sensor 275 can detect the detection part 2712. When there is no wire 2000 in the transmission channel Q5, the reset element 274 drives the material breakage detection element 271 to rotate, and the detection part 2712 and the sensor 275 are spaced apart, so the intrusion part 2711 intrudes into the transmission channel Q5, and the sensor 275 cannot detect the detection part 2712.

[0083] The sensor 275 can be configured as a Hall sensor, a photoelectric sensor, or an infrared sensor.

[0084] Optionally, the reset element 274 may be an elastic component such as a torsion spring or a tension spring.

[0085] Optionally, see Figure 9 and Figure 10 A through hole 253 is provided on the side of the extrusion bracket 250. The through hole 253 connects to the transport channel Q5. The intrusion part 2711 of the material breakage detection element 271 can enter the transport channel Q5 through the through hole 253.

[0086] In some embodiments, see Figure 11 The chassis 300 includes a rear side panel 380. A mounting platform 386 is provided on the side of the rear side panel 380 facing inwards from the chassis 300. A feed driver 281 is fixedly mounted on the mounting platform 386 and located inside the chassis 300. A housing 210 is located on the side of the rear side panel 380 facing outwards from the chassis 300 and is connected to the rear side panel 380. This further improves the structural compactness of the 3D printer 1000 and increases space utilization. Alternatively, the housing 211 can be integrated with the rear side panel 380.

[0087] In some embodiments, the top of the housing 300 along the Z-axis is provided with a feed channel, which is located in the middle of the second end 300b. A buffer (not shown in the figure) is installed on the housing 300, and the middle of the feed channel is connected to the buffer. The buffer is used to apply an elastic force to the filament 2000 during printing to provide a buffering effect. For example, during high-speed printing, if the filament 2000 feed is suddenly blocked due to a jam in the material tray, the buffer can move to move the filament 2000 near the far end of the extruder 200 toward the print head 100, thereby releasing a portion of the filament 2000 for the print head 100 to print, thus reducing the risk of insufficient extrusion or material breakage due to a momentary lack of material and improving printing reliability. The buffer can be an elastic structure, such as a spring, sleeved on the guide tube 192 and connected to the housing 300. When the print head 100 moves, the buffer can reduce the bending amplitude of the guide tube 192 at the inlet and outlet of the housing 300 to ensure the stability of the extrusion force.

[0088] Optionally, the buffer may also include a conveyor block and an elastic structure. The conveyor block is movably disposed along the feed channel, and the elastic structure is connected to the inner wall of the feed channel and the conveyor block to drive the conveyor block toward the print head 100.

[0089] The feeding channel can be located at the middle of the second end 300b along the X-axis direction.

[0090] In other embodiments, the top of the housing 300 is provided with a sliding hole for accommodating the sliding of the feed tube 192, and the sliding hole is arranged along the width direction of the housing 300. In this way, when the feeding of the wire 2000 is jammed, the feed tube 192 can slide along the sliding hole to drive a portion of the wire 2000 for printing by the print head 100.

[0091] See Figure 1 , Figure 12 and Figure 13The 3D printer 1000 also includes a print table 500. The print table 500 is located inside the chassis 300. The transfer device 400 includes a first driver 420, a second driver 430, and a third driver 440. The first driver 420 is mounted on the top of the chassis 300 and is used to drive the print head 100 to move along a first direction W1. The power output end of the first driver 420 is driveably connected to the print head 100. The second driver 430 is mounted on the top of the chassis 300 and is used to drive the print head 100 to move along a second direction W2. The power output end of the second driver 430 is driveably connected to the print head 100. The third driver 440 is mounted on the bottom of the chassis 300 and is used to drive the print table 500 to move along the Z-axis. The power output end of the third driver 440 is driveably connected to the print table 500. The first driver 420 and the second driver 430 are located at the first end 300a of the housing 300 along the Y-axis, and the third driver 440 is located at the second end 300b of the housing 300 along the Y-axis. The first driver 420 and the second driver 430 are located at opposite ends of the housing 300 along the X-axis. The first direction W1 and the second direction W2 intersect and are both perpendicular to the Z-axis. It should be noted that the 3D printer 1000 provided in this application can be a lightweight, miniaturized children's 3D printer. The first direction W1 and the second direction W2 can be directions that intersect the X-axis and Y-axis respectively and form acute angles. The Z-axis can be understood as a vertical direction.

[0092] Thus, the first driver 420 and the second driver 430 are arranged at both ends in the X-axis direction, so that the virtual center of gravity formed by the first driver 420 and the second driver 430 is close to the middle of the 3D printer 1000 along the X-axis direction. The first driver 420 and the second driver 430 at the top and the third driver 440 at the bottom are respectively arranged at both ends of the chassis 300 along the Y-axis direction, so that the center of gravity of the 3D printer 1000 is close to the middle of the Y-axis direction. In this way, the above structural arrangement can significantly improve the stability of the center of gravity of the 3D printer 1000, reduce the risk of the 3D printer 1000 tipping over to the second end 300b, and ensure the stability of the 3D printer 1000 during operation. When the user moves the 3D printer 1000, since the center of gravity of the 3D printer 1000 is relatively centered, the risk of the 3D printer 1000 tipping over due to the center of gravity shifting during the handling process can also be reduced. The third drive 440 is located at the bottom of the chassis 300. When moving the printer, the user can lower the center of gravity of the 3D printer 1000 by moving either the first end 300a or the second end 300b, further improving handling safety. In addition, the print head 100 and the print stage 500 are both located inside the chassis 300, using a closed design, which reduces the risk of the user touching the transmission structure or hot ends, improving the safety of using the 3D printer 1000.

[0093] In this embodiment, the top and bottom of the chassis 300 are positioned opposite each other along the Z-axis. The X-axis, Y-axis, and Z-axis are perpendicular to each other.

[0094] In some embodiments, see Figure 12 and Figure 13 The chassis 300 includes a housing 310 and a door 320 mounted on the housing 310, located at a first end 300a. The 3D printer 1000 also includes a mounting assembly 600 for mounting a material tray (not shown), located at a second end 300b. The print head 100 is a remote extrusion print head. The 3D printer 1000 also includes a remote extruder 200 for feeding filament from the material tray to the print head 100. The remote extruder 200 is mounted at the second end 300b. Using the remote extruder 200 reduces the load on the first driver 420 and the second driver 430, thereby helping to reduce the weight of the first driver 420 and the second driver 430. A power supply assembly 701 is mounted at the second end 300b, and the power supply assembly 701 is electrically connected to the print head 100, the first driver 420, the second driver 430, the third driver 440, and the remote extruder 200. When the user uses the 3D printer 1000, it is usually located in front of the door 320. In this way, the mounting component 600, the remote extruder 200 and the power supply component 701 can further increase the weight of the 3D printer 1000 at the second end 300b, improve the center of gravity stability of the 3D printer 1000 during printing, thereby reducing the risk of the 3D printer 1000 tipping over towards the door 320 during operation and improving the safety of the user when using the 3D printer 1000.

[0095] In some embodiments, see Figure 12 and Figure 13 The mounting component 600 includes a rack 610, which is detachably connected to the housing 310.

[0096] In some embodiments, the mounting assembly 600 includes a material tray 620 detachably connected to the housing 310. Optionally, the material tray 620 is fitted onto the material rack 610. Thus, the material rack 610 and the material tray 620 can be used to load different types of material trays. Specifically, material trays with larger radial dimensions can be mounted on the material rack 610, while material trays with smaller radial dimensions can be loaded into the material tray 620. Users can replace the corresponding material rack 610 or material tray 620 according to the size of the material tray, thereby improving the versatility of the 3D printer 1000.

[0097] Alternatively, the rack 610 may be a cylindrical structure extending along the X-axis.

[0098] In some embodiments, see Figure 12 and Figure 13The chassis 300 also includes a bottom shell 390, a top cover 370, and a rear side panel 380. The bottom shell 390 has side walls on both sides along the X-axis. A door 320 is detachably connected to the front side of the bottom shell 390 along the Y-axis. The rear side panel 380 is connected to the rear side of the bottom shell 390 along the Y-axis. The top cover 370 covers the bottom shell 390 above it along the Z-axis. The bottom shell 390, top cover 370, and rear side panel 380 together form a housing 310. A mounting assembly 600 is disposed on the side of the rear side panel 380 opposite to the bottom shell 390 along the Y-axis.

[0099] In some embodiments, see Figure 14 and Figure 15 The rear side plate 380 has a connecting hole 382 extending along the Y-axis. The material rack 610 is rotatably fitted into the connecting hole 382. The hole wall of the connecting hole 382 has a connecting protrusion 383. The side of the material rack 610 has a snap-fit ​​groove 611. The snap-fit ​​groove 611 includes a first groove segment 611a and a second groove segment 611b. The first groove segment 611a extends circumferentially along the material rack 610. The second groove segment 611b connects to the first groove segment 611a and extends along the length of the material rack 610. During the assembly of the material rack 610, the material rack 610 is inserted into the connecting hole 382, ​​and the connecting protrusion 383 extends from the second groove segment 611b into the first groove segment 611a. The material rack 610 is then rotated so that the connecting protrusion 383 and the second groove segment 611b are spaced circumferentially, allowing the first groove segment 611a to limit the connecting protrusion 383, thus connecting the material rack 610 to the rear side plate 380. When disassembling the material rack 610, it is rotated in the opposite direction until the connecting protrusion 383 aligns with the second groove segment 611b. Then, the material rack 610 is moved along its length, causing the connecting protrusion 383 to disengage from the second groove segment 611b, thus separating the material rack 610 from the rear side plate 380. This structure offers the advantage of convenient assembly and disassembly. In other embodiments, the material rack 610 and the rear side plate 380 can also be detachably connected via a snap-fit ​​mechanism or a screw connection.

[0100] Optionally, see Figure 15 Two connecting protrusions 383 are provided. The two connecting protrusions 383 are arranged radially opposite each other along the connecting hole 382. Two snap-fit ​​grooves 611 are provided on the side of the material rack 610. The two snap-fit ​​grooves 611 are arranged circumferentially spaced along the material rack 610. Each snap-fit ​​groove 611 is detachably engaged with the corresponding connecting protrusion 383. In other embodiments, the number of connecting protrusions 383 and the number of snap-fit ​​grooves 611 may also be multiple.

[0101] In some embodiments, see Figure 14 and Figure 15The rear side panel 380 has multiple connecting slots 384 spaced apart along the circumferential direction. The sides of the connecting slots 384 are provided with insertion interfaces 385. The surface of the material box 620 facing the rear side panel 380 has multiple insertion protrusions 621 spaced apart along the circumferential direction. Each insertion protrusion 621 is detachably fitted into its corresponding insertion interface 385. When installing the material box 620, the multiple insertion protrusions 621 are aligned one-to-one with the multiple connecting slots 384, and then the material box 620 is rotated so that the multiple insertion protrusions 621 are inserted one-to-one into the insertion interfaces 385, thus connecting the material box 620 to the rear side panel 380. When disassembling the material box 620, it is simply rotated in the opposite direction. The above structure has the advantage of convenient assembly and disassembly. In other embodiments, the material box 620 and the rear side panel 380 can also be detachably connected by a snap-fit ​​mechanism or by screws.

[0102] In some embodiments, see Figure 12 and Figure 13 The third drive 440 is located in the middle of the housing 310 along the X-axis direction. The distal extruder 200 and the mounting assembly 600 are located on opposite sides of the third drive 440 along the X-axis direction, and the center of gravity of the distal extruder 200 and the mounting assembly 600 is higher than the third drive 440 and lower than the center of gravity of the first drive 420 and the second drive 430. Thus, the virtual center of gravity formed by the distal extruder 200 and the mounting assembly 600 is close to the middle of the X-axis direction. When combined with the third driver 440, this makes the center of gravity of the parts along the second end 300b of the 3D printer 1000 generally close to the middle of the X-axis direction. Simultaneously, by limiting the center of gravity of the distal extruder 200 and the mounting assembly 600 to be lower than the centers of gravity of the first driver 420 and the second driver 430, the height of the 3D printer 1000's center of gravity at the second end 300b can be further reduced, improving the stability of the 3D printer 1000 at the second end 300b and further reducing the risk of forward tilting during placement. Having the center of gravity of the distal extruder 200 and the mounting assembly 600 higher than the third driver 440 avoids interference between the installation of the distal extruder 200 and the mounting assembly 600 and the third driver 440, improving the rationality of the component arrangement at the second end 300b.

[0103] Furthermore, after the mounting assembly 600 mounts the material tray, the weight of the first driver 420 and the second driver 430 can be matched with the weight of the material tray to reduce the risk of the 3D printer 1000 tilting backward along the Y-axis.

[0104] In some embodiments, see Figure 13The remote extruder 200 includes an extrusion assembly (including a drive wheel 220 and a driven wheel 240) and a feed driver 281 for driving the extrusion assembly. The extrusion assembly is mounted outside the housing 310, and the feed driver 281 is mounted inside the housing 310. The power output end of the feed driver 281 is connected to the extrusion assembly, and the feed driver 281 is electrically connected to the power supply assembly 701. The weight of the feed driver 281 is less than that of the first driver 420, the second driver 430, and the third driver 440. Since the virtual center of gravity formed by the first driver 420, the second driver 430, and the third driver 440 is offset forward along the Y-axis, the additional feed driver 281 and power supply assembly 701 can further increase the weight of the 3D printer 1000 at the rear, thereby improving the stability of the 3D printer 1000. At the same time, the feed driver 281 can also drive the movement of the extrusion assembly and extrude and deliver the filament from the trolley to the print head 100. The feed drive 281 is lightweight, effectively controlling the load on the functional components at the second end 300b, avoiding excessive increase in inertia at the second end 300b, and helping to maintain the overall balance of the machine.

[0105] In some embodiments, see Figure 16 and Figure 17 The 3D printer 1000 also includes a first transmission assembly 800 and a second transmission assembly 810. The first transmission assembly 800 and the second transmission assembly 810 are located at opposite ends of the print stage 500 along the X-axis, and are connected to a third driver 440. The 3D printer 1000 also includes two sets of second optical axes 820 and a first optical axis 830 located at the top of the chassis 300. The two sets of second optical axes 820 are located at opposite ends of the chassis 300 along the X-axis, and the two ends of the first optical axis 830 are slidably connected to the corresponding second optical axis 820. The print head 100 is slidably connected to the first optical axis 830. The first driver 420 and the second driver 430 are located below the first optical axis 830 and the second optical axis 820. The second optical axis 820 and the first optical axis 830 define a rectangular moving area A1 for the print head 100; a first direction W1 is parallel to one diagonal of the moving area A1, and a second direction W2 is parallel to the other diagonal of the moving area A1. The 3D printer 1000 also includes a first belt 841 connecting the print head 100 to the first driver 420 and a second belt 842 connecting the print head 100 to the second driver 430. The first driver 420 is used to drive the first belt 841 to move the print head 100 along a first direction W1, and the second driver 430 is used to drive the second belt 842 to move the print head 100 along a second direction W2.

[0106] Thus, the first transmission component 800 and the second transmission component 810 can drive the printing table 500 to move synchronously up and down on both sides along the X-axis, reducing the risk of tilting the printing table 500 and improving the layer thickness accuracy during the printing process. The two sets of second optical axes 820 and the first optical axis 830 can reliably guide the movement of the print head 100 in the X-axis and Y-axis directions and provide stable support for the print head 100. By driving the print head 100 to move along the two diagonals of the moving area A1 through the first belt 841 and the second belt 842 respectively, the moment of inertia of the print head 100 can be reduced, reducing the direct impact of motor vibration on the positional accuracy of the print head 100. This allows the 3D printer 1000 to achieve more precise movements with higher speed and acceleration, balancing the needs of high-speed and high-precision printing.

[0107] In some embodiments, see Figure 17 and Figure 18 The first belt 841 and the second belt 842 are staggered along their width direction, and the extension paths of the first belt 841 and the second belt 842 have at least partial overlap. For example, the first belt 841 and the second belt 842 have a rectangular overlap path in the upper part, and extend to the power output end of the first driver 420 and the power output end of the second driver 430 respectively in the lower part.

[0108] In some embodiments, see Figure 16 and Figure 17The 3D printer 1000 also includes a baffle plate 410 and two sliding seats 401. The two sliding seats 401 are spaced apart along the X-axis. One sliding seat 401 is movably mounted on a second optical axis 820 along the Y-axis. The other sliding seat 401 is movably mounted on another second optical axis 820 along the Y-axis. A first optical axis 830 connects the two sliding seats 401. A first belt 841 drives one of the sliding seats 401. A second belt 842 drives the other sliding seat 401. The baffle plate 410 is located on the side of the first belt 841, the second belt 842, and the first optical axis 830 near the door 320, and is used to block the first belt 841, the second belt 842, and the first optical axis 830. Thus, when the first driver 420 drives the first belt 841 and the second driver 430 stops driving the second belt 842, the first belt 841 synchronously drives the print head 100 to move along the X-axis and the slide block 401 to move along the Y-axis. The slide block 401 synchronously drives the print head 100 to move along the Y-axis, causing the print head 100 to move along the first direction W1. When the second driver 430 drives the second belt 842 and the first driver 420 stops driving the first belt 841, the second belt 842 synchronously drives the print head 100 to move along the X-axis and the slide block 401 to move along the Y-axis. The slide block 401 synchronously drives the print head 100 to move along the Y-axis, causing the print head 100 to move along the second direction W2. The baffle 410 can shield the transmission components to reduce the risk of accidental contact by the user and improve the safety of using the 3D printer 1000.

[0109] In some embodiments, see Figure 12 and Figure 19 The 3D printer 1000 also includes a first tensioning assembly 850 for adjusting the tension of the first belt 841 and a second tensioning assembly 860 for adjusting the tension of the second belt 842. The first tensioning assembly 850 and the second tensioning assembly 860 are located at the second end 300b of the housing 300, and are respectively located at opposite ends of the housing 300 along the X-axis. Thus, the first tensioning assembly 850 and the first driver 420 are spaced apart along the Y-axis, and the second tensioning assembly 860 and the second driver 430 are also spaced apart along the Y-axis, reducing the risk of interference between the operation of the first tensioning assembly 850 and the first driver 420, and reducing the risk of interference between the operation of the second tensioning assembly 860 and the second driver 430. Furthermore, the first tensioning assembly 850 and the second tensioning assembly 860 on both sides along the X-axis can maintain a balanced tension on the first belt 841 and the second belt 842, thereby ensuring the stability of the print head 100 in the XY plane.

[0110] Optionally, the power supply assembly 701 is located outside the moving area A1, and the first tensioning assembly 850 and the second tensioning assembly 860 are located within the Y-axis area A2 corresponding to the power supply assembly 701. Understandably, the second end 300b of the chassis 300 is provided with a Y-axis area A2, which can be considered as the area defined in the Y-axis direction between the inner and outer walls of the second end 300b of the chassis 300. The power supply assembly 701 is mounted within the Y-axis area A2. On the projection plane perpendicular to the Z-axis, the Y-axis area A2 is located outside the moving area A1, and the areas corresponding to the first tensioning assembly 850 and the second tensioning assembly 860 at least partially fall into the Y-axis area A2. Thus, adjustment can be performed using the Y-axis area A2 occupied by the power supply assembly 701, thereby reducing the number of pulleys. For example, see [reference needed]. Figure 19 Both the first belt 841 and the second belt 842 can be supported by one drive wheel, one tension wheel and three guide wheels. The tension wheel can be accommodated in the Y-axis direction by the area A2 above the power supply assembly 701 along the Y-axis, thus reducing the number of parts.

[0111] Specifically, the side of the second end 300b away from the first end 300a along the Y-axis direction forms its outer wall, and the side of the second end 300b close to the first end 300a along the Y-axis direction forms its inner wall. The inner wall and the outer wall form a space along the Y-axis direction. The space required by the first tensioning assembly 850 and the second tensioning assembly 860 during the tensioning process can be provided by the part of the Y-axis region A2 along the Y-axis direction, so that it does not need to occupy the moving region A1. Furthermore, the first belt 841 and the second belt 842 do not need to be wound in multiple directions, thereby reducing the number of guide wheels required for the operation of the first belt 841 and the second belt 842.

[0112] In some embodiments, see Figure 19 The 3D printer 1000 also includes a first drive wheel 421 and a second drive wheel 431 disposed in the chassis 300. The first drive wheel 421 and the second drive wheel 431 are located at the first end 300a. The first driver 420 is connected to the first drive wheel 421, and the second driver 430 is connected to the second drive wheel 431. The first tension wheel 853 and the second tension wheel are located at the second end 300b. The first belt 841 drives the first drive wheel 421, the first tension wheel 853, and the print head 100. The second belt 842 drives the second drive wheel 431, the second tension wheel, and the print head 100. The first tension wheel 853 is located inside the first belt 841, and the first belt 841 is tensioned when the first tension wheel 853 is away from the first driver 420. The second tension wheel is located inside the second belt 842, and the second belt 842 is tensioned when the second tension wheel is away from the second driver 430. The wrap angle between the first drive wheel 421 and the second drive wheel 431 is 180°±10°, and the wrap angle between the first tension wheel 853 and the second tension wheel is 90°±15°.

[0113] Thus, by arranging the first drive wheel 421, the second drive wheel 431, and the print head 100 at the first end 300a of the housing 300, a symmetrical dual-sided synchronous traction is formed. This ensures that the tension on both sides of the print head 100 is balanced, guaranteeing smooth movement of the print head 100, reducing the risk of print head 100 swaying, and minimizing the possibility of layering in the printed product. The tension wheel is located at the second end 300b of the housing 300, positioned inside the belt and extended outwards. This forces the first belt 841 and the second belt 842 to maintain uniform tension in the Y-axis direction, thereby eliminating transmission backlash and hysteresis caused by slack. This ensures that each start, stop, and reversal of the print head 100 receives an immediate and accurate response, guaranteeing consistent repeatability. The first drive pulley 421 and the second drive pulley 431 adopt a large wrap angle with near semi-circular shape, which increases the number of contact teeth between the first belt 841 and the first drive pulley 421, and between the second belt 842 and the second drive pulley 431. Even when transmitting large torques at high speeds, tooth skipping will not occur, ensuring the rigid transmission of driving torque. The first tension pulley 853 and the second tension pulley 882 adopt a smaller wrap angle, which reduces the radial pressure and friction loss borne by their bearings, making the belt smoother when turning. This reduces additional resistance fluctuations and makes the entire transmission system operate more quietly and smoothly.

[0114] In some embodiments, see Figure 20 The first tensioning assembly 850 includes a limiting block 851, a first tensioning block 852, a first tensioning wheel 853, and a first elastic element 854. The limiting block 851 is connected to the housing 300. The first tensioning block 852 is movably disposed relative to the limiting block 851 along the Y-axis. The first tensioning wheel 853 is rotatably connected to the first tensioning block 852 and abuts against the first belt 841. The first elastic element 854 connects the first tensioning block 852 and the limiting block 851. Thus, under the elastic force of the first elastic element 854, the first tensioning block 852 can drive the first tensioning wheel 853 to abut against the first belt 841 and provide tension to the first belt 841.

[0115] In this embodiment, the structure in which the second tensioning component 860 and the second belt 842 cooperate is the same as the structure in which the first tensioning component 850 and the first belt 841 cooperate, and will not be described again here.

[0116] In some embodiments, see Figure 16The chassis 300 also includes a base 330, multiple upright columns 340 mounted on the base 330, and a top frame 350 mounted on the top of the columns 340. The base 330 or the top frame 350 is an integral structure, or the base 330 and the top frame 350 are each an integral structure; the columns 340 and / or the top frame 350 are metal parts. Each corner of the base 330 is provided with a column 340. The chassis 300 also includes a mounting base 360 ​​connecting each corner of the top frame 350 to the corresponding column 340. The first driver 420, the second driver 430, the first tensioning assembly 850, and the second tensioning assembly 860 are respectively mounted on the corresponding mounting bases 360. Thus, by connecting each corner of the top frame 350 to the corresponding column 340 using the mounting bases 360, the chassis 300 forms a high-rigidity integral frame, which can effectively suppress deformation and vibration during the printing process. Multiple mounting bases 360 can improve the structural strength and stability of the corresponding first driver 420, second driver 430, first tensioning component 850, and second tensioning component 860, so as to ensure the stable transmission of driving force and tension force, and ensure the motion accuracy and reliability of the 3D printer 1000 during long-term use.

[0117] The base 330 and / or top frame 350 are an integral structure, which further improves the structural reliability of the chassis 300. The column 340 and / or top frame 350 are metal parts, which improves their structural strength.

[0118] In some embodiments, see Figure 20 The mounting base 360 ​​for installing the first tensioning component 850 or the second tensioning component 860 has a mounting hole 361 extending along the Y-axis. The first tensioning block 852 is movably fitted into the mounting hole 361 along the Y-axis. In this way, the mounting hole 361 can guide and adjust the movement direction of the first tensioning block 852, ensuring the reliability of the tension force application.

[0119] In some embodiments, see Figure 16 and Figure 21 The 3D printer 1000 also includes a third belt 870 connecting the first drive assembly 800 and the second drive assembly 810. See also Figure 11 and Figure 12 The output end of the third driver 440 is provided with a drive wheel 441. The drive wheel 441 is driven by a third belt 870. The third driver 440 is used to drive the drive wheel 441 to rotate, so as to drive the third belt 870 to run, thereby driving the first transmission assembly 800 and the second transmission assembly 810 to run, and thus driving the printing table 500 to move along the Z-axis.

[0120] In some embodiments, see Figure 16 and Figure 21The first transmission assembly 800 includes a lead screw 801, a nut 802, a first connecting part 803, and a transmission wheel 807. The lead screw 801 is rotatably connected to the housing 300. The lead screw 801 extends along the Z-axis. The nut 802 is rotatably connected to the lead screw 801. The first connecting part 803 connects the nut 802 and the print table 500. The transmission wheel 807 is connected to the lead screw 801. The transmission wheel 807 is in transmission engagement with the third belt 870. Thus, by rotating the transmission wheel 807, the lead screw 801 is driven to rotate, which in turn drives the nut 802 to move the first connecting part 803 along the Z-axis, thereby driving the print table 500 to move along the Z-axis under the drive of the third driver 440.

[0121] Optionally, the drive wheel 441, the third belt 870, and the transmission wheel 807 are located between the base 330 and the bottom shell 390. This conceals the transmission structure and improves the safety of using the 3D printer 1000.

[0122] In some embodiments, see Figure 16 The first transmission assembly 800 also includes a fixed plate 805 and two guide rods 804. The fixed plate 805 is connected to the column 340. The fixed plate 805 is located between the top frame 350 and the base 330 along the Z-axis. The two guide rods 804 are located on both sides of the lead screw 801 along the Y-axis. The two guide rods 804 extend along the Z-axis. One end of the two guide rods 804 is connected to the base 330, and the other end is connected to the fixed plate 805. Both guide rods 804 are slidably engaged with the first connecting part 803 along the Z-axis. In this way, the two guide rods 804 can guide the movement of the first connecting part 803 along the Z-axis, improving the movement accuracy. At the same time, the guide rods 804 located on both sides of the lead screw 801 can improve the structural stability of the first transmission assembly 800.

[0123] In some embodiments, see Figure 16 The first transmission assembly 800 also includes a protective plate 806. The protective plate 806 is located on the side of the lead screw 801 and the two guide rods 804 facing the interior of the housing 300. The protective plate 806 can shield the lead screw 801 and the guide rods 804, reducing the risk of accidental contact by the user and improving user safety.

[0124] In this embodiment, the structure of the second transmission component 810 is the same as that of the first transmission component 800, and will not be described again here.

[0125] In some embodiments, see Figure 16 and Figure 22 The 3D printer 1000 also includes a third tensioning assembly 880 for adjusting the tension of the third belt 870. The third tensioning assembly 880 is disposed between the base 330 and the bottom shell 390, and is located in the middle of the chassis 300 along the X-axis direction.

[0126] In some embodiments, see Figure 22 The base 330 has a first abutment 331 on the side near the bottom shell 390. The third tensioning assembly 880 includes a second tensioning block 881, a second elastic member 883, and two third tensioning pulleys 882. The second tensioning block 881 is located along the Y-axis on the side of the first abutment 331 opposite to the drive wheel 441. The second tensioning block 881 is movably disposed on the base 330 along the Y-axis. The second elastic member 883 connects the second tensioning block 881 and the first abutment 331. The two third tensioning pulleys 882 are rotatably connected to both sides of the second tensioning block 881 along the X-axis. The two tensioning pulleys abut against the portions of the third belt 870 that engage with the two drive pulleys 807. Thus, by moving the second tension block 881 along the Y-axis, the two third tension pulleys 882 can synchronously tension the third belt 870 and the two transmission pulleys 807, thereby ensuring that the first transmission assembly 800 and the second transmission assembly 810 bear similar or the same tension, and thus ensuring the reliability of the two in driving the printing table 500 to move along the Z-axis.

[0127] Specifically, the elastic force applied by the second elastic element 883 can form a tension against the third belt 870 through the second tensioning block 881.

[0128] In some embodiments, see Figure 23 The printing table 500 includes a substrate 510, a magnetic chuck 520, and a printing plate 530 stacked together. The substrate 510 is driveably connected to a third driver 440. The magnetic chuck 520 is mounted on the substrate 510, and the printing plate 530 is magnetically connected to the magnetic chuck 520. The printing table 500 does not include a heating element. Because the printing table 500 does not have a heating element, the heat received by the printing table 500 comes only from the heated filament, significantly reducing the risk of burns from overheating and improving the safety of the 3D printer 1000. Furthermore, reducing the heating element lowers the weight of the printing table 500 and reduces its moment of inertia along the Z-axis, which improves the response speed and stability of the printing table 500's movement along the Z-axis.

[0129] Optionally, the magnetic attachment 520 can be constructed as a soft magnet, which has the advantages of easy installation and good flatness, ensuring the flatness of the printing plate 530, thereby improving print quality.

[0130] In some embodiments, see Figure 23The printing table 500 also includes a first mounting base 540. A base plate 510 is disposed on the first mounting base 540. The first mounting base 540 is connected to a first transmission assembly 800 and a second transmission assembly 810 on both sides along the X-axis. This enables stable transmission of the printing table 500 along the Z-axis, improving the displacement accuracy of the printing table 500 and thus improving print quality.

[0131] Optionally, the first mounting base 540 is provided with second connecting portions 550 at both ends along the X-axis. The two second connecting portions 550 are connected to the corresponding first connecting portions 803 by means of screws, pins or welding.

[0132] In some embodiments, see Figure 24 The 3D printer 1000 also includes an air purification component 900, which is connected inside the chassis 300. The air intake 900a of the air purification component 900 connects to the inner cavity Q1 of the chassis 300, and the air outlet 900b connects to the external environment of the chassis 300. The air purification component 900 can exhaust air from inside the chassis 300 to the external environment. Clean air from outside the chassis 300 flows into the 3D printer 1000 through gaps in the chassis 300 under the negative pressure environment inside the chassis 300. Thus, after 3D printing, the air inside the chassis 300 remains relatively clean, significantly improving the air quality of the operating environment, protecting the health of the operator, and making it more suitable for children or teenagers, thus enhancing the product's safety and environmental friendliness.

[0133] In some embodiments, see Figure 25 and Figure 26 The air purification assembly 900 includes a purification body 910 and a fan 920. Both the purification body 910 and the fan 920 are located on the side of the housing 300 near the rear panel 380. A vent 381 is formed on the lower side of the rear panel 380 along the Z-axis. An air inlet 900a is provided on the upper side of the purification body 910 along the Z-axis. The purification body 910 defines a first flow channel Q2. The fan 920 is located on the lower side of the purification body 910 along the Z-axis. The fan 920 is connected to the purification body 910. An air outlet 921, connected to the vent 381, is provided at the other end of the fan 920. Thus, when the fan 920 is running, it guides the gas in the inner cavity Q1 through the first flow channel Q2 to the vent 381 and discharges it from the vent 381.

[0134] Alternatively, the fan 920 can be an axial flow fan.

[0135] In this embodiment, see Figure 24The side wall of the purification body 910 facing the door 320 along the Y-axis is formed as the inner wall of the second end 300b, and the rear side plate 380 is formed as the outer wall of the second end 300b. The space between the two along the Y-axis is formed as the Y-axis region A2. In this way, the structure of the purification body 910 can be fully utilized, so there is no need to set an additional plate between the purification body 910 and the door 320, thus improving the structural compactness of the 3D printer 1000.

[0136] In some embodiments, see Figure 26 The air purification assembly 900 also includes a filter housing 930, a filter section 940, and a baffle 950. The purification body 910 also includes a top plate 911. The top plate 911 has an air inlet end 900a. The lower side of the top plate 911 along the Z-axis direction is provided with an installation space 912 and a first guide channel Q2. The first guide channel Q2 has a first guide port 913 and a second guide port 914 arranged opposite to each other. The first guide port 913 connects to the installation space 912. The second guide port 914 connects to the air inlet side of the fan 920. The filter housing 930 is disposed in the first guide channel Q2. The filter housing 930 defines a second guide channel Q3. The second guide channel Q3 has a third guide port 931 and a fourth guide port 932 arranged opposite to each other. The third guide port 931 connects to the air inlet end 900a. The fourth guide port 932 connects to the first guide port 913. The filter section 940 is disposed in the second guide channel Q3. The gas in the inner cavity Q1 can first enter the second guide channel Q3, be filtered by the filter section 940, enter the first guide channel Q2, and then be discharged from the air outlet 921 of the fan 920. In this way, the cleanliness of the gas discharged from the inner cavity Q1 to the external environment can be improved, thereby improving the reliability of the 3D printer 1000.

[0137] In some embodiments, see Figure 25 and Figure 26 The purification body 910 has an installation port 915 on the side facing the inner cavity Q1. The installation port 915 connects to the second guide channel Q3. The installation port 915 is correspondingly arranged with the filter unit 940. The air purification assembly 900 also includes a baffle 950. The baffle 950 is detachably installed in the installation port 915. In this way, when the user is in front of the 3D printer 1000, they can easily remove the baffle 950 to open the installation port 915 and replace the filter unit 940, thereby improving the user's ease of use.

[0138] Optionally, the baffle 950 can be detachably connected to the purification body 910 through various connection methods such as sliding fit and rotation fit.

[0139] See Figure 27 and Figure 28The printhead 100 includes a second mounting base 110, a front housing 120, a rear housing 130, a hot-end assembly 140, and a circuit board 150. The second mounting base 110 is used to connect to the power output end of the transfer device 400. The front housing 120 is detachably connected to one side of the second mounting base 110 along the Y-axis. The rear housing 130 is connected to the other side of the second mounting base 110 along the Y-axis. The hot-end assembly 140 is detachably mounted between the front housing 120 and the second mounting base 110, and is used to melt and extrude the wire. The circuit board 150 is mounted between the rear housing 130 and the second mounting base 110.

[0140] Thus, during the process of the hot-end component 140 heating and melting the filament, the second mounting base 110 can isolate the heat, thereby reducing the heat conducted to the circuit board 150, minimizing the impact of the hot-end component 140 on the circuit board 150, extending the service life of the circuit board 150 and improving its operational stability. The circuit board 150 and the hot-end component 140 are respectively mounted on both sides of the second mounting base 110 along the Y-axis, allowing the center of gravity of the print head 100 to be close to the second mounting base 110. The second mounting base 110 also drives the power output end of the transfer device 400, thereby reducing the distance between the connection point of the transfer device 400 and the second mounting base 110 and the center of gravity of the print head 100. This reduces unilateral wear during the movement of the print head 100, improving the stability of the print head 100 during movement, significantly reducing the amount of swaying during high-speed printing, and thus improving printing accuracy. Furthermore, removing the front housing 120 from the second mounting base 110 exposes the hot end assembly 140, making it easier to handle or replace the hot end assembly 140 and improving the ease of disassembly and replacement of the hot end assembly 140.

[0141] In addition, the front shell 120, the hot end assembly 140, and the second mounting base 110 are arranged side by side along the Y-axis. In actual application, the user does not need to remove the printhead 100 from the transfer device 400. The front shell 120 can be separated and the hot end assembly 140 can be taken out in sequence, which facilitates the maintenance and replacement of the hot end, shortens the downtime due to failure, and solves the problem of cumbersome maintenance process of the traditional printhead 100.

[0142] In some embodiments, see Figures 29 to 31 The 3D printer 1000 also includes a baffle plate 410. The baffle plate 410 connects to the transfer device 400 (see...). Figure 1The transfer device 400 includes a first optical axis 830. The power output end of the transfer device 400 includes a first belt 841. A clearance hole K3 is provided in the middle of the second mounting base 110 for the sliding insertion of a baffle plate 410. The clearance hole K3 passes through both ends of the second mounting base 110 along the X-axis direction. The middle refers to the position of the second mounting base 110 near the center along the Z-axis direction. A fixing position C3 is provided on the second mounting base 110 for connecting the power output end of the transfer device 400. The fixing position C3 is located on the side of the clearance hole K3 away from the front housing 120. The baffle plate 410 is used to block the first optical axis 830, the first belt 841, and its drive rod (such as a lead screw) of the transfer device 400 along the Y-axis direction, which helps improve product safety. The second mounting base 110 has a mating hole K4 for engaging with the first optical axis 830. The mating hole K4 passes through both ends of the second mounting base 110 along the X-axis. There are two mating holes K4, located at both ends of the second mounting base 110 along the Z-axis, and a clearance hole K3 is located between the two mating holes K4. In other embodiments, the number of mating holes K4 may be one, three, four, or more.

[0143] When the user is using the 3D printer 1000, the front shell 120 is located on the side of the rear shell 130 closer to the user. The fixing position C3 is blocked by the baffle plate 410, which reduces the risk of the user manually touching the power output end (such as the first optical axis 830, the first belt 841, etc.) and improves the safety of use. At the same time, the baffle plate 410 can also block the communication cable or cable connected to the second mounting base 110, improving the aesthetics of the 3D printer 1000. The first optical axis 830 can guide the driven movement of the second mounting base 110, improving the movement accuracy of the second mounting base 110, thereby improving the movement accuracy of the print head 100 and improving the print quality. The clearance hole K3 is set between the two mating holes K4 along the Z-axis direction, which can reduce the risk of interference between the baffle plate 410 and the first optical axis 830.

[0144] In some embodiments, the transfer device 400 is used to drive the second mounting base 110 to move along the Y-axis and X-axis directions. A baffle plate 410 extends along the X-axis. The transfer device 400 is used to drive the baffle plate 410 to move along the Y-axis. The projection of the baffle plate 410 along the Y-axis covers the movement trajectory of the second mounting base 110 along the Z-axis. Thus, during the movement of the second mounting base 110 driven by the transfer device 400, it can be ensured that the baffle plate 410 always blocks a portion of the second mounting base 110 along the Y-axis.

[0145] Optionally, the first optical axis 830 is set to extend along the X-axis direction.

[0146] In some embodiments, see Figure 28 and Figure 30The second mounting base 110 includes a mounting slide 111 and a mounting base 112. The mounting base 112 is detachably connected to the mounting slide 111. The front housing 120 is detachably connected to the side of the mounting base 112 opposite to the mounting slide 111. A hot-end assembly 140 is disposed between the front housing 120 and the mounting base 112. The rear housing 130 is detachably connected to the side of the mounting slide 111 opposite to the mounting base 112. A circuit board 150 is disposed between the rear housing 130 and the mounting slide 111. A mating hole K4 and a fixing position C3 are formed on the mounting slide 111.

[0147] Thus, the mounting slide 111 serves as the primary motion guide, while the mounting base 112 supports components such as the hot-end assembly 140, the heating assembly 146, and the strain detection element 170. By separating the high-precision-machined slide from the mounting base 112 that supports multiple functional components, the overall machining cost of the second mounting base 110 can be reduced, facilitating its manufacturing, assembly, and maintenance.

[0148] In some embodiments, see Figure 30 A clearance hole K3 is defined between the mounting base 112 and the mounting slide 111. This reduces the number of openings on the mounting base 112 or the mounting slide 111, thereby increasing the strength of the mounting base 112 and the mounting slide 111 and extending the service life of the printhead 100.

[0149] Optionally, the mounting base 112 and the mounting slide 111 are arranged side by side along the Y-axis and define the clearance hole K3.

[0150] In some embodiments, the print head 100 does not have an extruder. This further reduces the weight of the print head 100, thereby reducing the load requirements of the transfer device 400 and the weight and size of the drive source (such as a motor) of the transfer device 400, contributing to the lightweight design of the 3D printer 1000. Simultaneously, the motion accuracy of the transfer device 400 is improved, reducing the vibration amplitude during high-speed movement, effectively reducing surface texture of the printed model, and improving printing accuracy and surface quality. Furthermore, by eliminating the extrusion structure, the overall weight and size of the print head 100 are reduced, allowing for a smaller chassis 300, thus reducing the weight of the 3D printer 1000 and improving its space utilization.

[0151] In some embodiments, see Figure 31 The top of the printhead 100 is equipped with a connector 191 for detachably connecting the feed tube 192. The connector 191 is located on the top of the second mounting base 110. One end of the feed tube 192 is connected to the connector 191, and the other end of the feed tube 192 is connected to the distal extruder 200.

[0152] Optionally, connector 191 connects to the junction of top plate 1122 and front cover 120. This allows for quick assembly and disassembly of connector 191 after removing the front cover 120, improving the user experience.

[0153] The front housing 120 and the second mounting base 110 may be connected by magnetic attraction or snap-fit. See also, in some embodiments, […]. Figure 32 and Figure 33 The front housing 120 includes a first housing portion 121 and a second housing portion 122. The first housing portion 121 is correspondingly disposed with respect to the second mounting base 110 along the Y-axis direction. The second housing portion 122 is connected to one end of the first housing portion 121 along the Z-axis direction, and the second housing portion 122 is correspondingly disposed with respect to the second mounting base 110 along the Z-axis direction. See also Figure 32 The first magnetic attraction part 161 is provided on the side of the first housing part 121 facing the second mounting base 110 along the Y-axis direction. See also Figure 33 The second magnetic attraction part 162 is provided on the side of the second mounting base 110 facing the first housing part 121 along the Y-axis direction. See also Figure 32 The first snap-fit ​​portion 163 is located on the side of the second housing portion 122 facing the second mounting base 110 along the Z-axis direction. See also Figure 33 The second latching portion 164 is located on the side of the second mounting base 110 facing the second housing portion 122 along the Z-axis. Thus, the first magnetic attraction portion 161, the second magnetic attraction portion 162, the first latching portion 163, and the second latching portion 164 cooperate to position and fix the front housing 120 to the second mounting base 110. When disassembling the front housing 120, first move the front housing 120 along the Z-axis to separate the first latching portion 163 from the second latching portion 164, and simultaneously separate the first magnetic attraction portion 161 from the second magnetic attraction portion 162. Then move the front housing 120 along the Y-axis to achieve quick disassembly of the front housing 120. When the front housing 120 is mounted on the second mounting base 110, the second mounting base 110, by supporting the second housing portion 122, improves the connection reliability between the front housing 120 and the second mounting base 110.

[0154] Furthermore, the first magnetic attraction part 161 and the second magnetic attraction part 162 of the first shell 121 cooperate to withstand the impact and vibration in the Y-axis direction. The first snap-fit ​​part 163 and the second snap-fit ​​part 164 of the second shell 122 can utilize gravity and the force in the Z-axis direction to effectively prevent the front shell 120 from slipping off when the print head 100 moves at high speed. Thus, under the compact structure design of small volume, the movement reliability of the print head 100 is further guaranteed.

[0155] Optionally, see Figure 32 The first housing portion 121 has a first receiving slot 1211. A first magnetic suction portion 161 is disposed within the first receiving slot 1211. See also... Figure 33The second mounting base 110 has a second receiving slot 113. The second magnetic part 162 is provided in the second receiving slot 113.

[0156] Optionally, see Figure 32 The first latching portion 163 includes a third latching slot 163a. ​​The third latching slot 163a is open along the Z-axis direction. See also Figure 33 The second snap-fit ​​portion 164 protrudes from the second mounting base 110 along the Z-axis direction. The second snap-fit ​​portion 164 engages with the third slot 163a along the Z-axis direction.

[0157] In some embodiments, see Figure 34 The hot end assembly 140 includes a hot end 141 and a cold end 142 disposed on the feed end 143 of the hot end 141. The hot end 141 can be a nozzle, which can be an integral component. The cold end 142 can be a heat sink, which can be provided with heat dissipation fins. The feed end 143 includes a throat. The hot end 141 and / or the cold end 142 are detachably connected to the second mounting base 110, and the hot end 141 and the cold end 142 are arranged along the Z-axis direction, which intersects the Y-axis direction. The print head 100 also includes a first fan 144 for cooling the model, the first fan 144 being connected to one end of the second mounting base 110 along the Z-axis direction, and the first fan 144 being correspondingly arranged with the hot end 141 along the Y-axis direction. The printhead 100 also includes a second fan 145, which is connected to the second mounting base 110. The second fan 145 is positioned corresponding to the cold end 142 along the X-axis, with the X-axis, Z-axis, and Y-axis intersecting each other. In this way, the first fan 144 can improve the cooling speed of the model, thereby improving the printing quality. The second fan 145 can improve the cooling efficiency of the cold end 142, reducing the risk of filament blockage at the cold end 142.

[0158] In some embodiments, see Figure 28 The second mounting base 110 has a first mounting groove C1 on one side along the Y-axis. The hot-end assembly 140, the second fan 145, and the heating assembly 146 are housed in the first mounting groove C1, and the front cover 120 covers the first mounting groove C1. Thus, when the front cover 120 is connected to the second mounting base 110, the hot-end assembly 140, the second fan 145, and the heating assembly 146 are all hidden within the first mounting groove C1, reducing the risk of accidental contact with these components during the operation of the 3D printer 1000 and improving the safety of the 3D printer 1000. Simultaneously, after removing the front cover 120, the hot-end assembly 140 and the heating assembly 146 are exposed, improving the convenience of disassembly and maintenance.

[0159] Optionally, the first housing portion 121 of the front housing 120 covers the first mounting groove C1.

[0160] In some embodiments, see Figure 28 A second mounting groove C2 is formed on the side of the rear housing 130 facing the second mounting base 110 along the Y-axis. The end of the rear housing 130 near the second mounting base 110 is connected to the second mounting base 110 via a fastening member. A circuit board 150 is fixedly connected to the second mounting base 110 on the side facing the rear housing 130 along the Y-axis. The circuit board 150 is housed within the second mounting groove C2. Thus, the second mounting groove C2 provides sufficient mounting space for the circuit board 150, which facilitates heat dissipation of the circuit board 150 and prevents the impact force from being directly transmitted to the circuit board 150 when the rear housing 130 is subjected to impact, thereby improving the protection of the circuit board 150.

[0161] In some embodiments, see Figure 35 A heating component 146 for heating the hot end 141 is mounted on the second mounting base 110. The circuit board 150 is electrically connected to the heating component 146. The heating component 146 is detachably connected to the hot end 141 and is located on the side of the first fan 144 near the hot end 141. A fastener 180 for connecting to the second mounting base 110 is mounted on the cold end 142. This helps to maintain the stability of the hot end component 140. Optionally, the first fan 144 is a centrifugal fan 144a. The air inlet end of the first fan 144 has a first air inlet K11, which faces the circuit board 150. The air outlet end of the first fan 144 has a first air outlet K12, which is higher than the discharge end of the hot end component 140 and is inclined towards the discharge end of the hot end component 140. The heating component 146 is higher than the first air outlet K12. See Figure 33 and Figure 37 A heat insulation sleeve 167 is provided over the hot end 141 and the heating assembly 146. The heat insulation sleeve 167 reduces the heat conducted from the heating assembly 146 to the cold end 142 and the feed end 143. See also Figure 34 and Figure 35 The second fan 145 is an axial flow fan 145a. The second mounting base 110 has a second air inlet K21 and a second air outlet K22 on opposite sides along the X-axis, respectively. See [reference needed]. Figure 35 The cold end 142 is located between the second air outlet K22 and the second air inlet K21.

[0162] Circuit board 150 controls the heating power and heating status of heating component 146. Centrifugal fan 144a has a small volume, which helps to reduce the overall size of printhead 100. Centrifugal fan 144a has a large air pressure, which makes the generated cooling airflow more directional, ensuring that the cooling airflow flows towards the model, reducing the flow of cooling airflow to the hot end 141, thereby reducing the temperature impact on the hot end 141. The first air inlet K11 is set towards circuit board 150, so that when the first fan 144 is working, the outside air first passes through circuit board 150 and dissipates heat from circuit board 150, and then is discharged from its air outlet and the first air outlet K12 to cool the model. In this way, the first fan 144 can meet the heat dissipation and cooling needs of circuit board 150 and model, without the need to configure an additional cooling fan for circuit board 150, further reducing the weight of printhead 100 and improving the structural compactness of printhead 100. During the operation of the axial flow fan 145a, the air outside the second mounting base 110 along the X-axis direction is blown towards the cold end 142 through the second air inlet K21 and discharged from the second air outlet K22, thereby ensuring the cooling effect of the axial flow fan 145a on the cold end 142.

[0163] Optionally, see also Figure 32 The rear shell 130 has an air inlet 131 at one end along the Z-axis near the first fan 144. The air inlet 131 is connected to the first air inlet K11. When the first fan 144 is working, air outside the print head 100 can enter the first fan 144 through the air inlet 131 and the first air inlet K11, and then be discharged from the air outlet of the first fan 144 and blown towards the model through the first air outlet K12.

[0164] In some embodiments, see Figure 32 The mounting base 112 includes a back plate portion 1121, a top plate portion 1122, and two side plate portions 1123. The back plate portion 1121 and the mounting slide 111 define a clearance hole K3 along the Y-axis direction. The back plate portion 1121 is connected to the mounting slide 111. The top plate portion 1122 is connected to one end of the back plate portion 1121 along the Z-axis direction. The top plate portion 1122 is also connected to the mounting slide 111. The two side plate portions 1123 are respectively connected to both sides of the back plate portion 1121 and both sides of the top plate portion 1122 along the X-axis direction. A hot-end assembly 140 is detachably connected to the back plate portion 1121, and is located between and spaced apart from the two side plate portions 1123.

[0165] Optionally, a second air inlet K21 is provided on one side panel 1123, and a second air outlet K22 is provided on the other side panel 1123.

[0166] In some embodiments, see Figure 35The printhead 100 also includes a fan mounting component 165. The fan mounting component 165 is connected to the bottom of the second mounting base 110 along the Z-axis. The first fan 144 is housed in the fan mounting component 165. The fan mounting component 165 has a first air outlet K12.

[0167] In some embodiments, see Figures 34 to 36 The printhead 100 also includes a strain gauge 170, one end of which is connected to the second mounting base 110, and the other end of which extends toward the front housing 120, forming a cantilever end 170a. A hot-end assembly 140 is detachably connected to the cantilever end 170a. The strain gauge 170 is used to detect the force on the hot-end assembly 140 along the Z-axis. Thus, by connecting the hot-end assembly 140 to the cantilever end 170a, the strain gauge 170 can simultaneously detect the position of the hot-end assembly 140, thereby achieving position calibration of the printhead 100. Simultaneously, the hot-end assembly 140 can also be connected to the second mounting base 110 via the strain gauge 170, reducing the number of connecting components, ensuring the connection reliability of the hot-end assembly 140, and improving the structural compactness of the printhead 100.

[0168] In addition, the cantilever structure can improve the detection accuracy of the strain gauge 170. When the hot end 141 touches the printing table 500 of the 3D printer 1000, the tiny displacement and reaction force are instantly and without damage transmitted to the strain gauge 170, so that the strain gauge 170 can obtain the accurate contact pressure of the hot end 141, thereby accurately constructing the mesh map of the printing table 500.

[0169] In some embodiments, see Figure 28 The hot-end assembly 140 is located on one side of the strain gauge 170 along the Z-axis. A latching member 180 connects the hot-end assembly 140 to the side near the front housing 120, with one end of the latching member 180 detachably connected to the cantilever end 170a. Thus, the latching member 180 allows for quick-release installation and removal of the hot-end assembly 140 and the strain gauge 170, facilitating disassembly and maintenance of the hot-end assembly 140 while maintaining the reliability of the strain gauge 170.

[0170] In some embodiments, see Figure 36The strain gauge 170 includes an overlapping section 171 and a limiting section 172. One end of the overlapping section 171 is connected to the second mounting base 110, and the limiting section 172 is connected to the other end of the overlapping section 171. The limiting section 172 and the partially overlapping section 171 form a cantilever end 170a. The limiting section 172 is inclined in a direction away from the overlapping section 171 and in a direction away from the hot end assembly 140 along the Z-axis. The fastener 180 overlaps at the connection between the overlapping section 171 and the limiting section 172, and the limiting section 172 is used to prevent the fastener 180 from disengaging from the overlapping section 171. Thus, during the process of the fastener 180 being inserted into the overlapping section 171, the limiting section 172 can guide the fastener 180. When the hot end component 140 is subjected to force or scratches, the limiting segment 172 can limit the movement of the fastener 180, thereby ensuring the continuous and stable detection signal and preventing accidental disengagement during high-speed movement.

[0171] In some embodiments, see Figure 36 The fastening element 180 includes a fastening body 181 and a latch 182. The fastening body 181 is fixedly connected to the cold end 142 and is spaced apart from the strain gauge 170 along the Z-axis. One end of the latch 182 is rotatably connected to the fastening body 181, and the other end of the latch 182 is used to engage with the overlapping section 171. When installing the hot end assembly 140, rotating the latch 182 to pass over the limiting section 172 and engage with the overlapping section 171 achieves the connection between the fastening element 180 and the strain gauge 170.

[0172] In some embodiments, see Figure 34 The printhead 100 includes a fastener 166, a third connecting portion 168, and a heat insulation portion 169. The fastener 166 is disposed on the second mounting base 110 and extends along the Y-axis towards the hot-end assembly 140. The third connecting portion 168 connects to the heating assembly 146 via the heat insulation portion 169. The third connecting portion 168 has a second connecting hole 1681 extending along the Y-axis. The second connecting hole 1681 engages with the fastener 166 to mount the heating assembly 146 onto the second mounting base 110. Thus, the engagement of the second connecting hole 1681 and the fastener 166 positions the heating assembly 146 on the second mounting base 110, improving the reliability and accuracy of the installation of the heating assembly 146 and the second mounting base 110.

[0173] In some embodiments, see Figure 37The heating assembly 146 includes a heat-conducting bracket 1461, a heating element 1462, and a temperature sensing element 1463. The heat-conducting bracket 1461 is connected to a third connecting part 168 via a heat insulation part 169. The heating element 1462 is disposed on the side of the heat-conducting bracket 1461 near the back plate part 1121. The heating element 1462 is used to heat the heat-conducting bracket 1461. The temperature sensing element 1463 is disposed on the side of the heat-conducting bracket 1461. The temperature sensing element 1463 is used to detect the temperature of the heat-conducting bracket 1461, and can be a thermistor. A third mounting groove 1464 is formed on the side of the heat-conducting bracket 1461 opposite to the back plate part 1121. The hot end 141 is installed in the third mounting groove 1464. Thus, the heating element 1462 heats the heat-conducting bracket 1461, and conducts heat through the heat-conducting bracket 1461 to the hot end 141 in the third mounting groove 1464. The third mounting groove 1464 limits and fixes the hot end 141, and the heat-conducting bracket 1461 distributes heat evenly. Combined with the temperature detection element 1463, it achieves precise temperature control, improving heating stability and safety. In addition, the heat insulation part 169 can provide heat insulation, reducing the heat conducted to the third connecting part 168 and the back plate part 1121.

[0174] During the installation of the hot end assembly 140 in this embodiment, the third connecting part 168 is fixed to the back plate part 1121 by fasteners 166, and then the heat-conducting bracket 1461 is fixed to the third connecting part 168 by heat insulation part 169. The hot end 141 is loaded into the third mounting groove 1464, and the buckle 180 is connected to the strain detection element 170. Then, the heat insulation sleeve 167 is installed on the heat-conducting bracket 1461 to reduce heat loss of the heat-conducting bracket 1461 and improve the heating effect of the hot end 141.

[0175] 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 3D printer, characterized in that, include: A chassis having a first end and a second end spaced apart along the Y-axis direction; The printhead is located inside the chassis; A remote extruder is installed outside the casing and located at the second end. The remote extruder is used to feed the wire and control the pressure output by the print head. A feed tube connects the feed end of the print head to the discharge end of the remote extruder, and the feed tube has a channel for the wire material to pass through.

2. The 3D printer according to claim 1, characterized in that: The distal extruder includes a housing, a drive wheel, a transmission component, a driven wheel, and a feed driver. The housing is disposed on the outer wall of the second end, and the drive wheel is rotatably disposed on the housing. The transmission component is movably connected to the housing, and the operating end of the transmission component is located on the outside of the housing. The driven wheel is rotatably connected to the transmission component and is correspondingly disposed to the drive wheel. A clamping area for clamping wire is defined between the driven wheel and the drive wheel. The driven wheel is configured to move away from the drive wheel under the drive of the transmission component so that the wire can pass into the clamping area. The feed driver is mounted on the chassis, and the power output end of the feed driver is connected to the drive wheel. The feed driver is used to drive the drive wheel to rotate.

3. The 3D printer according to claim 2, characterized in that: The housing includes an outer shell and a cover plate. The outer shell has a receiving groove, in which the driving wheel, the driven wheel, and part of the transmission components are received. The receiving groove is open on one side along the axial direction of the driving wheel. The cover plate covers the receiving groove and is slidably fitted to the outer shell.

4. The 3D printer according to claim 2, characterized in that: The distal extruder also includes an extrusion bracket disposed on the housing, the extrusion bracket defining a transmission channel for transmitting the wire material, the drive wheel being rotatably connected to the extrusion bracket and located on one side of the transmission channel, and the driven wheel and the transmission component being located on the other side of the extrusion bracket.

5. The 3D printer according to claim 4, characterized in that: The remote extruder also includes a material breakage detection element connected to the extrusion bracket. The material breakage detection element has a first position located outside the transmission channel under the pressure of the wire material and a second position extending into the transmission channel.

6. The 3D printer according to claim 1, characterized in that: The printhead includes a mounting base, a front shell, a rear shell, a hot end assembly, and a circuit board; the mounting base is used to connect to the power output end of the transfer device; the front shell is detachably connected to one side of the mounting base along the Y-axis; the rear shell is connected to the other side of the mounting base along the Y-axis; the hot end assembly is detachably installed between the front shell and the mounting base, and the hot end assembly is used to melt and extrude the wire material; the circuit board is installed between the rear shell and the mounting base.

7. The 3D printer according to claim 6, characterized in that: The hot end assembly includes a hot end and a cold end disposed at the feed end of the hot end. The hot end and / or the cold end are detachably connected to the mounting base. The hot end and the cold end are arranged along the Z-axis direction. The print head also includes a first fan for cooling the model. The first fan is connected to one end of the mounting base along the Z-axis direction. The first fan and the hot end are arranged correspondingly along the Y-axis direction. The print head also includes a second fan. The second fan is connected to the mounting base. The second fan and the cold end are arranged correspondingly along the X-axis direction. And / or, the printhead further includes a strain sensor, one end of which is connected to the mounting base, and the other end of which extends toward the front housing and forms a cantilever end; the hot end assembly is detachably connected to the cantilever end, and the strain sensor is used to detect the force on the hot end assembly along the Z-axis; And / or, the mounting base has a mating hole for engaging with the transmission optical shaft, the mating hole penetrating both ends of the mounting base along the X-axis direction, the mounting base has a clearance hole in the middle, the clearance hole penetrating both ends of the mounting base along the X-axis direction, the clearance hole covering the mating hole along the Y-axis direction, the 3D printer also includes a baffle plate, the baffle plate slidably engaging with the clearance hole; the mounting base has a fixing position for connecting the power output end of the transfer device, the fixing position being located on the side of the clearance hole away from the front shell.

8. The 3D printer according to claim 1, characterized in that, The 3D printer also includes: A first driver is installed on the top of the chassis and is used to drive the print head to move in a first direction. The power output end of the first driver is connected to the print head for transmission. The second driver is installed on the top of the chassis and is used to drive the print head to move in the second direction. The power output end of the second driver is connected to the print head for transmission. The printing table is located inside the chassis; The third driver is installed at the bottom of the chassis and is used to drive the printing table to move along the Z-axis. The power output end of the third driver is connected to the printing table via a transmission. The first driver and the second driver are located at the first end, the third driver is located at the second end, and the first driver and the second driver are located at opposite ends of the chassis along the X-axis.

9. The 3D printer according to claim 8, characterized in that: The 3D printer further includes a first belt, a first drive wheel, a second belt, a second drive wheel, a first tension wheel, and a second tension wheel disposed in the chassis. The first drive wheel and the second drive wheel are located at the first end. The first driver is connected to the first drive wheel, and the second driver is connected to the second drive wheel. The first tension wheel and the second tension wheel are located at the second end. The first belt drives the first drive wheel, the first tension wheel, and the print head. The second belt drives the second drive wheel, the second tension wheel, and the print head. The first tension wheel is located inside the first belt, and the first belt is tensioned when the first tension wheel is away from the first driver. The second tension wheel is located inside the second belt, and the second belt is tensioned when the second tension wheel is away from the second driver. The wrap angle between the first drive wheel and the second drive wheel is 180°±10°, and the wrap angle between the first tension wheel and the second tension wheel is 90°±15°.

10. The 3D printer according to any one of claims 1-9, characterized in that: The top of the chassis along the Z-axis is provided with a feeding channel, which is located in the middle of the second end; or, The top of the chassis along the Z-axis is provided with a feeding channel, and a buffer is installed on the chassis. The middle part of the feeding channel is connected to the buffer. or, The top of the chassis is provided with a sliding hole for accommodating the sliding of the guide tube, and the sliding hole is arranged along the width direction of the chassis.

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