Printing head and three-dimensional printer

Abstract

The utility model discloses a printing head and a three-dimensional printer, relates to the technical field of three-dimensional printing, and mainly aims to simplify the structure of the printing head and reduce the weight of the printing head so as to improve the printing precision and the printing efficiency of the printing head. According to the main technical scheme, the printing head comprises an extrusion assembly, the extrusion assembly comprises a plurality of extrusion mechanisms, and the extrusion mechanisms are used for conveying consumables; a plurality of nozzles; and the driving mechanism is in driving connection with the multiple extrusion mechanisms and the multiple spray heads, and the driving mechanism is used for driving one of the spray heads to move to the printing position and driving one of the extrusion mechanisms to clamp the consumable so as to convey the consumable into the spray head located at the printing position at the same time.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and more specifically, to a print head and a 3D printer. Background Technology

[0002] 3D printers with multiple printheads can meet users' needs for printing color models.

[0003] Currently, multi-nozzle 3D printers typically include multiple nozzles and extruders for extruding various consumables or multiple extruders for extruding different consumables. They also include drive mechanisms for switching between different nozzles for printing, as well as drive mechanisms for switching between extruders to deliver different consumables. The printhead has a relatively complex structure and is quite heavy, which is not conducive to the rapid movement of the printhead, affecting not only printing accuracy but also printing efficiency. Utility Model Content

[0004] In view of this, the present invention provides a printhead and a 3D printer, the main purpose of which is to simplify the printhead structure, reduce the printhead weight, and thereby improve the printing accuracy and printing efficiency of the printhead.

[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0006] On one hand, this utility model embodiment provides a printhead, including:

[0007] An extrusion assembly, comprising a plurality of extrusion mechanisms for conveying consumables;

[0008] Multiple nozzles;

[0009] A drive mechanism is connected to a plurality of extrusion mechanisms and a plurality of printheads. The drive mechanism is used to drive one of the printheads to move to the printing position, and at the same time drive one of the extrusion mechanisms to clamp the consumable to feed the consumable into the printhead at the printing position.

[0010] Furthermore, the driving mechanism includes a first driving member, a first actuator, and a second actuator, wherein the first actuator and the second actuator are respectively connected to the first driving member, and the first driving member is used to drive the first actuator and the second actuator to move synchronously;

[0011] The first actuator is connected to the plurality of printhead drives for driving one of the printheads to move to the printing position;

[0012] The second actuator is driven to connect with the plurality of extrusion mechanisms for driving one of the extrusion mechanisms to clamp the consumable.

[0013] Furthermore, the print head also includes:

[0014] A bracket, wherein the printhead is disposed on the bracket, and the printhead is used to move relative to the bracket between a first standby position and a printing position, and a plurality of the printheads are arranged at intervals along a straight line;

[0015] The first actuator includes a first rotating shaft and a plurality of first pushing blocks. The plurality of first pushing blocks are disposed on the first rotating shaft and are arranged at intervals along the axial direction of the first rotating shaft in a spiral trajectory. Each of the first pushing blocks corresponds to a nozzle.

[0016] The first rotating shaft is connected to the output end of the first driving member, which drives the first rotating shaft to rotate so that one of the first pushing blocks pushes the corresponding printhead to the printing position.

[0017] Furthermore, the print head also includes:

[0018] Multiple first elastic elements are provided, and the nozzle is connected to the bracket through the first elastic elements. The first elastic elements are used to drive the nozzle to move to the first standby position when the first push block leaves the nozzle.

[0019] Furthermore, the extrusion mechanism is provided with a driving wheel and a driven wheel on the support, and multiple extrusion mechanisms are arranged at intervals along a straight line;

[0020] The second actuator includes a second rotating shaft and a plurality of second pushing blocks. The plurality of second pushing blocks are disposed on the second rotating shaft and are arranged at intervals along the axial direction of the second rotating shaft in a spiral trajectory. Each of the second pushing blocks corresponds to one of the driven wheels.

[0021] The second rotating shaft is connected to the output end of the first driving member. The first driving member is used to drive the second rotating shaft to rotate so that one of the second pushing blocks pushes the driven wheel corresponding to the second pushing block to the extrusion position.

[0022] When the driven wheel is in the extrusion position, the driving wheel and the driven wheel clamp the consumable.

[0023] Furthermore, the nozzle corresponds one-to-one with the plurality of extrusion mechanisms, and the position of the first push block for pushing the nozzle corresponds to the position of the second push block for pushing the driven wheel corresponding to the nozzle;

[0024] When the first push block pushes the corresponding nozzle to the printing position, the second push block corresponding to the position of the first push block pushes the corresponding driven wheel to the extrusion position;

[0025] or,

[0026] The extrusion mechanism further includes a pressure plate, which is disposed on the support and rotates relative to the support. The driven wheel is disposed on the pressure plate, and the second pushing block corresponds to the pressure plate one by one.

[0027] When the second push block abuts against the pressure plate, the second push block is used to push the corresponding pressure plate to rotate relative to the bracket, so as to drive the driven wheel to switch between the second standby position and the extrusion position. In the second standby position, the distance between the driving wheel and the driven wheel is greater than the diameter of the consumable to release the consumable.

[0028] or,

[0029] The extrusion assembly further includes a second driving member, which includes a second driving body, a transmission member, and a driving shaft. The driving shaft is rotatably mounted on the bracket, and the second driving body is connected to the driving shaft through the transmission member to drive the driving shaft to rotate.

[0030] The drive wheels of the plurality of extrusion mechanisms are all disposed on the drive shaft and are arranged at intervals along the axial direction of the drive shaft.

[0031] Furthermore, if the nozzles correspond one-to-one with the extrusion mechanism, and the position of the first pushing block used to push the nozzles corresponds to the position of the second pushing block used to push the driven wheel corresponding to the nozzles; when the first pushing block pushes the corresponding nozzle to the printing position, the second pushing block corresponding to the position of the first pushing block pushes the corresponding driven wheel to the extrusion position, the extrusion mechanism further includes a pressure plate, the pressure plate is disposed on the bracket and rotates relative to the bracket, the driven wheel is disposed on the pressure plate, and the second pushing block corresponds one-to-one with the pressure plate;

[0032] The printhead also includes a plurality of second elastic elements. The pressure plate is connected to the bracket through the second elastic elements, and the second elastic elements and the driven wheel are located on the same side of the pressure plate. When the second pushing block abuts against the pressure plate, the second elastic element is in a compressed state. When the second elastic element separates from the pressure plate, the second elastic element rebounds and drives the pressure plate to rotate to the second standby position.

[0033] or,

[0034] If the extrusion mechanism further includes a pressure plate, the pressure plate is disposed on the support and rotates relative to the support, the driven wheel is disposed on the pressure plate, and the second pushing block corresponds to the pressure plate one by one. When the second pushing block abuts against the pressure plate, the second pushing block is used to push the pressure plate corresponding to it to rotate relative to the support, so as to drive the driven wheel to switch between the second standby position and the extrusion position. In the second standby position, the distance between the driving wheel and the driven wheel is greater than the diameter of the consumable to release the consumable.

[0035] The printhead also includes a plurality of second elastic elements. The pressure plate is connected to the bracket through the second elastic elements, and the second elastic elements and the driven wheel are located on the same side of the pressure plate. When the second pushing block abuts against the pressure plate, the second elastic element is in a compressed state. When the second pushing block separates from the pressure plate, the second elastic element rebounds and drives the pressure plate to rotate to the second standby position.

[0036] or,

[0037] If the extrusion assembly further includes a second driving member, the second driving member includes a second driving body, a transmission member and a driving shaft, the driving shaft is disposed on the bracket, the second driving body is connected to the driving shaft through the transmission member to drive the driving shaft to rotate, the driving wheels of the plurality of extrusion mechanisms are all disposed on the driving shaft and arranged at intervals along the axial direction of the driving shaft, the extrusion mechanism further includes a pressure plate, the pressure plate is disposed on the bracket and rotates relative to the bracket, the driven wheel is disposed on the pressure plate, and the second pushing block corresponds to the pressure plate one by one;

[0038] The printhead also includes a plurality of second elastic elements. The pressure plate is connected to the bracket through the second elastic elements, and the second elastic elements and the driven wheel are located on the same side of the pressure plate. When the second pushing block abuts against the pressure plate, the second elastic element is in a compressed state. When the second pushing block separates from the pressure plate, the second elastic element rebounds and drives the pressure plate to rotate to the second standby position.

[0039] Furthermore, the first driving component includes a first driving body, a first worm, a second worm, a first worm wheel, and a second worm wheel. The first driving body is connected to the first worm, the first worm is connected to the second worm, the first worm wheel is meshed with the first worm, and the second worm wheel is meshed with the second worm. The first driving body drives the first worm and the second worm to rotate simultaneously.

[0040] The first actuator is connected to the second worm gear, and the second actuator is connected to the first worm gear.

[0041] Furthermore, the print head also includes:

[0042] The support frame, the extrusion assembly, the plurality of nozzles and the drive mechanism are respectively disposed on the support frame;

[0043] A detection component is disposed on the bracket and is used to generate a first feedback signal when the extrusion mechanism stops producing material.

[0044] or,

[0045] The printhead also includes a support, and the extrusion assembly, the plurality of nozzles and the drive mechanism are respectively disposed on the support;

[0046] A detection component is disposed on the bracket and is used to generate a first feedback signal when the extrusion mechanism stops producing material.

[0047] The detection assembly includes multiple detection elements, and the multiple detection elements correspond to multiple extrusion mechanisms;

[0048] The detection component includes a detection wheel and a photoelectric sensor. The detection wheel is rotatably mounted on the bracket, and a plurality of light-transmitting holes are opened in the circumferential direction of the detection wheel. The photoelectric sensor is mounted on the bracket and corresponds to the detection wheel.

[0049] The detection wheel is used to abut against the consumable and rotate as the consumable moves, so that the photoelectric sensor generates a second feedback signal; the detection wheel is also used to stop rotating when it is detached from the consumable, so that the photoelectric sensor generates the first feedback signal.

[0050] On the other hand, this embodiment of the invention also provides a 3D printer, including the aforementioned print head.

[0051] By employing the above technical solution, this utility model has at least the following beneficial effects:

[0052] The printhead and 3D printer provided in this embodiment of the invention include multiple extrusion mechanisms, multiple nozzles, and a drive mechanism. The drive mechanism is connected to the multiple extrusion mechanisms and nozzles, and can drive one of the nozzles to move to the printing position while simultaneously driving one of the extrusion mechanisms to clamp the filament, thus feeding the filament into the nozzle at the printing position. In other words, the drive mechanism in this embodiment can simultaneously switch between different nozzles for printing and between different extrusion mechanisms to feed filament into the nozzle. That is, using the same drive mechanism to simultaneously switch between nozzles and extrusion mechanisms simplifies the printhead structure, reduces its weight, and facilitates rapid printhead movement, thereby improving printing accuracy and efficiency. Attached Figure Description

[0053] Figure 1 An exploded view of a printhead provided for an embodiment of this utility model;

[0054] Figure 2 A schematic diagram of the structure of a printhead provided in an embodiment of this utility model;

[0055] Figure 3 A schematic diagram of a printhead from a first-view perspective is provided for an embodiment of this utility model;

[0056] Figure 4 A schematic diagram of the structure of the first and second actuators of the drive mechanism in a printhead provided for an embodiment of this utility model;

[0057] Figure 5 A schematic diagram of a printhead from a second-view perspective is provided for an embodiment of this utility model;

[0058] Figure 6 A schematic diagram of a printhead from a third-person perspective is provided for an embodiment of this utility model;

[0059] Figure 7 This utility model provides a schematic diagram of a printhead from a fourth-view perspective;

[0060] Figure 8 This utility model provides a schematic diagram of a printhead from a fifth-angle perspective;

[0061] Figure 9 This utility model provides a schematic diagram of a printhead from a sixth-angle perspective.

[0062] Explanation of reference numerals in the attached figures:

[0063] 1-Extrusion assembly; 11-Extrusion mechanism; 12-Second driving component; 121-Second driving body; 122-Transmission component; 1221-First gear; 123-Drive shaft; 111-Driving wheel; 112-Driven wheel; 1121-Pressure plate; 1222-Second gear; 2-Nozzle; 21-Nozzle body; 22-Drive plate; 223-Drive mechanism; 31-First driving component; 311-First driving body; 312-First worm; 313-Second worm; 314-First worm wheel; 315-Second worm wheel; 32-First actuator; 321-First rotating shaft; 322-First push block; 33-Second actuator; 331-Second rotating shaft; 332-Second push block; 4-Bracket; 5-First elastic element; 6-Second elastic element; 7-Detection assembly; 71-Detection wheel; 72-Photoelectric sensor; 8-Third elastic element; 100-Consumables. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the present utility model will be described in more detail below with reference to the accompanying drawings of the preferred embodiments. Some embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0065] like Figure 1 , Figure 2 , Figures 7 to 9 As shown, this utility model embodiment provides a printhead including an extrusion assembly 1, which includes multiple extrusion mechanisms 11 for conveying consumables 100; multiple nozzles 2; and a drive mechanism 3, which is drivenly connected to the multiple extrusion mechanisms 11 and the multiple nozzles 2. The drive mechanism 3 is used to drive one of the nozzles 2 to move to the printing position, and at the same time drive one of the extrusion mechanisms 11 to clamp the consumables 100 to convey the consumables 100 into the nozzle 2 in the printing position.

[0066] It should be noted that the drive mechanism 3 is driven and connected to multiple extrusion mechanisms 11 and multiple nozzles 2. The drive connection method here may include direct connection, indirect connection and / or abutment connection.

[0067] The printing position can be the position where the printhead 2 is used for printing. Of course, the printhead 2 can also be moved to a standby position when not printing, with the printing position being lower than the standby position. Correspondingly, the extrusion mechanism 11 can release the consumable 100 when not extruding. In this embodiment, if one printhead 2 is in the printing position, the other printheads 2 can be in the standby position; if one extrusion mechanism 11 clamps the consumable 100, the other extrusion mechanisms 11 can release the consumable 100.

[0068] The printhead provided in this embodiment includes multiple extrusion mechanisms 11, multiple nozzles 2, and a drive mechanism 3. The drive mechanism 3 is driven and connected to the multiple extrusion mechanisms 11 and the multiple nozzles 2. The drive mechanism 3 can drive one of the nozzles 2 to move to the printing position and simultaneously drive one of the extrusion mechanisms 11 to clamp the consumable 100, thereby feeding the consumable 100 into the nozzle 2 at the printing position. In other words, in the technical solution provided by this embodiment, the drive mechanism 3 can simultaneously switch between different nozzles 2 for printing and switch between different extrusion mechanisms 11 to feed the consumable 100 into the nozzle 2. That is, by using the same drive mechanism 3 to simultaneously achieve the switching of the nozzle 2 and the switching of the extrusion mechanism 11, the structure of the printhead is simplified, the weight of the printhead is reduced, which facilitates rapid movement of the printhead and thus improves printing accuracy and efficiency.

[0069] In some embodiments, see Figure 3 , Figure 4 , Figure 5 and Figure 6 The driving mechanism 3 may include a first driving member 31, a first actuator 32, and a second actuator 33. The first actuator 32 and the second actuator 33 are respectively connected to the first driving member 31. The first driving member 31 is used to drive the first actuator 32 and the second actuator 33 to move synchronously. The first actuator 32 is driven to connect with a plurality of printheads 2 and is used to drive one of the printheads 2 to move to the printing position. The second actuator 33 is driven to connect with a plurality of extrusion mechanisms 11 and is used to drive one of the extrusion mechanisms 11 to clamp the consumable 100.

[0070] The first driving member 31 can drive the first actuator 32 and the second actuator 33 to move synchronously, so that when the first actuator 32 drives a printhead 2 to the printing position, the second actuator 32 can drive an extrusion mechanism 11 to clamp the consumable 100 to transport the consumable 100 close to the printhead 2. The heating block of the printhead 2 melts the consumable 100. As the consumable 100 is continuously transported forward, the melted consumable 100 at the nozzle end of the printhead 2 is extruded, thereby realizing the printing work of the printhead 2 and improving the printing efficiency.

[0071] Specifically, multiple nozzles 2 can be located at the bottom of multiple extrusion mechanisms 11, and multiple nozzles 2 and multiple extrusion mechanisms 11 can correspond one-to-one. When a nozzle 2 reaches the printing position, its upper part and the corresponding extrusion mechanism 11 can clamp and convey the consumable 100 downward to the nozzle 2.

[0072] In some embodiments, the printhead may further include a support 4, with the printhead 2 disposed on the support 4. The printhead 2 is used to move relative to the support 4 between a first standby position and a printing position, and a plurality of printheads 2 are arranged at intervals along a straight line.

[0073] In some embodiments, see Figure 3 and Figure 4 The first actuator 32 may include a first rotating shaft 321 and a plurality of first pushing blocks 322. The plurality of first pushing blocks 322 are disposed on the first rotating shaft 321 and arranged at intervals along the axial direction of the first rotating shaft 321 in a spiral trajectory. The first pushing blocks 322 correspond one-to-one with the printhead 2. The first rotating shaft 321 is connected to the output end of the first driving member 31. The first driving member 31 is used to drive the first rotating shaft 321 to rotate so that one of the first pushing blocks 322 pushes its corresponding printhead 2 to the printing position.

[0074] The first actuator 32 can be located above the plurality of printheads 2. Since the plurality of first push blocks 322 are arranged at intervals along the axial direction of the first rotating shaft 321 in a spiral trajectory, and the plurality of first push blocks 322 correspond to the plurality of printheads 2, when the first drive member 31 drives the first rotating shaft 321 to rotate, the plurality of first push blocks 322 can sequentially press down on the plurality of printheads 2 as the first rotating shaft 321 rotates, so that the plurality of printheads 2 descend to the printing position in sequence.

[0075] The number of nozzles 2 can be two or more. Taking four nozzles 2 as an example, the above embodiment will be specifically described. Specifically, there are also four first push blocks 322, and the four first push blocks 322 can be spaced 90 degrees apart from each other in the circumferential direction of the first rotating shaft 321; the multiple nozzles 2 are arranged at intervals along a straight line. If the nozzle 2 located at the end is the first nozzle 2, then the remaining nozzles 2 are the second nozzle 2 to the fourth nozzle 2 in sequence. The four first push blocks 322 corresponding to the first to fourth nozzles 2 are the first first push block 322 to the fourth first push block 322, respectively. In the initial position, the first first push block 322 can be set to extend in the horizontal direction.

[0076] When the first printhead 2 needs to print, the first rotating shaft 321 can rotate 90 degrees. At this time, the first pushing block 322 rotates downward 90 degrees with the first rotating shaft 321, thereby pressing the first printhead 2 down to the printing position. During this process, the other first pushing blocks 322 do not contact the other printheads 2. When the second printhead 2 needs to print, the first rotating shaft 321 can rotate 180 degrees. At this time, the second first pushing block 322 rotates downward 180 degrees with the first rotating shaft 321, thereby pressing the second printhead 2 down to the printing position. It should be noted that during this process, the first first pushing block 322 also rotates downward 90 degrees with the first rotating shaft 321, so that the first printhead 2 will be pressed down to the printing position. The other first pushing blocks 322 do not contact the other printheads 2. In order to ensure that only one printhead 2 is in the printing position, the first printhead 2 can be reset at this time, or the printhead 2 can be connected to the bracket 4 through the elastic element. In this way, when the first first pushing block 322 is separated from the first printhead 2, the elastic element can drive the first printhead 2 to reset, thereby achieving that only the second printhead 2 is in the printing position. When the third printhead 2 needs to print, the first rotating shaft 321 can rotate 270 degrees. At this time, the third first pushing block 322 rotates downward 270 degrees with the first rotating shaft 321, thereby pressing the third printhead 2 down to the printing position. It should be noted that during this process, the first first pushing block 322 and the second first pushing block 322 rotate downward 90 degrees and 180 degrees respectively with the first rotating shaft 321, so that the first printhead 2 and the second printhead 2 will be pressed down to the printing position in sequence. Similarly, the first printhead 2 and the second printhead 2 can be reset, so that only the third printhead 2 is in the printing position. When the fourth printhead 2 needs to print, the first rotating shaft 321 can rotate 360 ​​degrees. At this time, the fourth first pushing block 322 rotates downward 360 degrees with the first rotating shaft 321, thereby pressing the fourth printhead 2 down to the printing position. It should be noted that during this process, the first to third first pushing blocks 322 rotate downward 90 degrees, 180 degrees and 270 degrees with the first rotating shaft 321 respectively, so that the first printhead 2 to the third printhead 2 will be pressed down to the printing position in sequence. Similarly, the first printhead 2 to the third printhead 2 can be reset, so that only the fourth printhead 2 is in the printing position.

[0077] Understandably, if the first rotating shaft 321 reverses, the fourth first pushing block 322 can rotate 90 degrees. The fourth first pushing block 322 then reverses downwards by 90 degrees along with the first rotating shaft 321, thus pressing the fourth printhead 2 down to the printing position. During this process, the other first pushing blocks 322 do not contact the other printheads 2, thus preventing other printheads 2 from being pressed down. Therefore, the switching between the first and fourth printheads 2 located at the end can be achieved by driving the first rotating shaft 321 to reverse, thereby avoiding unnecessary pressing down of the printheads 2.

[0078] To facilitate the movement of the printhead 2 driven by the first actuator 32, in some embodiments, the bracket 4 may have mounting holes arranged in a straight line. The printhead 2 may include a printhead body 21 and a drive plate 22. The consumable 100 of the printhead body 21 passes through the mounting holes, and the drive plate 22 is connected to the entrance of the consumable 100 channel. The first push block 322 may abut against the drive plate 22 to push the entire printhead 2 downward to the printing position.

[0079] In some embodiments, see Figure 5 The printhead may also include multiple first elastic elements 5. The printhead 2 is connected to the bracket 4 through the first elastic elements 5. The first elastic elements 5 are used to drive the printhead 2 to move to the first standby position when the first push block 322 leaves the printhead 2.

[0080] The first elastic element 5 can be disposed between the aforementioned drive plate 22 and bracket 4, so that the first elastic element 5 can provide an upward elastic force to the printhead 2. When the first push block 322 abuts against the drive plate 22, the first elastic element 5 is compressed, and the printhead 2 moves downward to the printing position; when the first push block 322 leaves the drive plate 22, the first elastic element 5 restores its deformation, thereby driving the printhead 2 to reset to the first standby position. Specifically, the first elastic element 5 can be a spring and can be sleeved on the outside of the aforementioned consumable 100 channel.

[0081] In some embodiments, see Figure 3 , Figure 4 and Figure 6 The extrusion mechanism 11 may include a driving wheel 111 and a driven wheel 112 disposed on the support 4, and multiple extrusion mechanisms 11 are arranged at intervals along a straight line.

[0082] The driven wheel 112 is movably arranged relative to the driving wheel 111. The driven wheel 112 is used to move relative to the driving wheel 111 between a second standby position and an extrusion position. In the second standby position, the driving wheel 111 and the driven wheel 112 are separated to release the consumable 100. In the extrusion position, the driving wheel 111 and the driven wheel 112 are brought together to clamp the consumable 100.

[0083] In some embodiments, see Figure 3 and Figure 4 The second actuator 33 may include a second rotating shaft 331 and a plurality of second push blocks 332. The plurality of second push blocks 332 are disposed on the second rotating shaft 331 and are arranged at intervals along the axial direction of the second rotating shaft 331 in a spiral trajectory. The second push blocks 332 correspond one-to-one with the driven wheels 112. The second rotating shaft 331 is connected to the output end of the first driving member 31. The first driving member 31 is used to drive the second rotating shaft 331 to rotate so that one of the second push blocks 332 pushes the driven wheel 112 corresponding to the second push block 332 to the extrusion position.

[0084] The second actuator 33 can be located on the side of the multiple extrusion mechanisms 11. Since the multiple second push blocks 332 are arranged at intervals along the axial direction of the second rotating shaft 331 in a spiral trajectory, and the multiple second push blocks 332 correspond to the multiple driven wheels 112, when the first drive member 31 drives the second rotating shaft 331 to rotate, the multiple second push blocks 332 can sequentially push the driven wheels 112 as the second rotating shaft 331 rotates, so that the multiple driven wheels 112 move to the extrusion position in sequence.

[0085] The number of extrusion mechanisms 11 can be the same as the number of nozzles 2. Taking four extrusion mechanisms 11 as an example, the above embodiment will be specifically described. Specifically, there are also four second push blocks 332, and the four second push blocks 332 can be spaced 90 degrees apart from each other in the circumferential direction of the second rotating shaft 331; multiple driven wheels 112 are arranged at intervals along a straight line. If the extrusion mechanism 11 located at the end is the first extrusion mechanism 11, then the remaining extrusion mechanisms 11 are the second to fourth extrusion mechanisms 11 in sequence. The four second push blocks 332 corresponding to the first to fourth extrusion mechanisms 11 are the first to fourth second push blocks 332, respectively. In the initial position, the first second push block 332 can be extended vertically.

[0086] When the first extrusion mechanism 11 needs to extrude consumable 100, the second rotating shaft 331 can rotate 90 degrees. At this time, the first second pushing block 332 rotates 90 degrees with the second rotating shaft 331, thereby pushing the driven wheel 112 of the first extrusion mechanism 11 to the extrusion position. During this process, the other second pushing blocks 332 do not contact the driven wheels 112 of the other extrusion mechanisms 11. When the second extrusion mechanism 11 needs to extrude consumable 100, the second rotating shaft 331 can rotate 180 degrees. At this time, the second second pushing block 332 rotates 180 degrees with the second rotating shaft 331, thereby pushing the driven wheel 112 of the second extrusion mechanism 11 to the extrusion position. It should be noted that during this process, the first second pushing block 332 also rotates 90 degrees with the second rotating shaft 331, so that the driven wheel 112 of the first extrusion mechanism 11 will be pushed to the extrusion position. The other second pushing blocks 332 do not contact the other driven wheels 112. In order to ensure that only one driven wheel 112 of the extrusion mechanism 11 is in the printing position, the driven wheel 112 of the first extrusion mechanism 11 can be reset at this time, or the driven wheel 112 can be connected to the bracket 4 through an elastic element. In this way, when the first second pushing block 332 and its corresponding driven wheel 112 are separated, the elastic element can drive the driven wheel 112 to reset, thereby realizing that only the driven wheel 112 of the second extrusion mechanism 11 is in the extrusion position. When the third extrusion mechanism 11 needs to extrude consumable 100, the second rotating shaft 331 can rotate 270 degrees. At this time, the third second pushing block 332 rotates 270 degrees with the second rotating shaft 331, thereby pushing the driven wheel 112 of the third extrusion mechanism 11 to the extrusion position. It should be noted that during this process, the first second pushing block 332 and the second second pushing block 332 rotate downwards by 90 degrees and 180 degrees respectively with the second rotating shaft 331, so that the driven wheels 112 of the first and second extrusion mechanisms 11 will be pushed to the extrusion position in sequence. Similarly, the driven wheels 112 of the first and second extrusion mechanisms 11 can be reset, so that only the driven wheel 112 of the third extrusion mechanism 11 is in the extrusion position. When the fourth extrusion mechanism 11 needs to extrude consumable 100, the second rotating shaft 331 can rotate 360 ​​degrees. At this time, the fourth second pushing block 332 rotates 360 degrees with the second rotating shaft 331, thereby pushing the driven wheel 112 of the fourth extrusion mechanism 11 to the extrusion position. It should be noted that during this process, the first to third second pushing blocks 332 rotate downwards by 90 degrees, 180 degrees and 270 degrees respectively with the second rotating shaft 331, so that the driven wheels 112 of the first to third extrusion mechanisms 11 will be pushed to the extrusion position in sequence. Similarly, the driven wheels 112 of the first to third extrusion mechanisms 11 can be reset, so that only the driven wheel 112 of the fourth extrusion mechanism 11 is in the extrusion position.

[0087] Understandably, if the second rotating shaft 331 reverses, the fourth second pushing block 332 can rotate 90 degrees. The fourth second pushing block 332, along with the second rotating shaft 331, reverses 90 degrees, thereby pushing the driven wheel 112 of the fourth extrusion mechanism 11 to the extrusion position. During this process, the remaining second pushing blocks 332 do not contact the driven wheels 112 of the other extrusion mechanisms 11, thus preventing any other driven wheels 112 from being pushed. Therefore, the switching between the first and fourth extrusion mechanisms 11 located at the ends can be achieved by driving the second rotating shaft 331 to reverse, thereby avoiding unnecessary pushing of the extrusion mechanism 11.

[0088] To facilitate the first push block 322 pushing the nozzle 2 and the second push block 332 pushing the pressure plate 1121, in some embodiments, see [reference needed]. Figure 3 and Figure 4 The end face of the first push block 322 that abuts against the printhead 2 is an arc surface, so that the first push block 322 can push the printhead 2 to the printing position through the arc surface as the first rotating shaft 321 rotates. The end face of the second push block 332 that abuts against the pressure plate 1121 is an arc surface, so that the second push block 332 can push the pressure plate 1121 to the extrusion position through the arc surface as the second rotating shaft 331 rotates.

[0089] In some embodiments, multiple nozzles 2 may correspond to multiple extrusion mechanisms 11, specifically one-to-one correspondence, and the position of the first push block 322 used to push the nozzle 2 and the position of the second push block 332 used to push the driven wheel 112 corresponding to the nozzle 2 correspond to each other; when the first push block 322 pushes the corresponding nozzle 2 to the printing position, the second push block 332 corresponding to the position of the first push block pushes the corresponding driven wheel 112 to the extrusion position.

[0090] In the context of the second push block 332, which corresponds to the position of the first push block 322, pushing the corresponding driven wheel 112 to the extrusion position, the first "corresponding" refers to the second push block 332 corresponding to the first push block 322, and the second "corresponding" refers to the driven wheel 112 corresponding to the second push block 332.

[0091] Specifically, the first rotating shaft 321 and the second rotating shaft 331 can be arranged parallel to each other, and multiple first pushing blocks 322 and multiple second pushing blocks 332 can correspond one-to-one. Moreover, in the circumferential direction of the first rotating shaft 321 or the second rotating shaft 331, the first pushing block 322 and its corresponding second pushing block 332 differ by a preset angle, so that when the printhead 2 moves to the printing position, the extrusion mechanism 11 corresponding to the printhead 2 can just clamp the consumable 100, thereby realizing the feeding of the consumable 100 into the printhead 2. If there are four printheads 2 and extrusion mechanisms 11, and the printhead 2 moves up and down while the driven wheel 112 of the extrusion mechanism 11 rotates horizontally, then the first pushing block 322 and its corresponding second pushing block 332 differ by 90 degrees.

[0092] The driven wheel 112 can be movably arranged relative to the driving wheel 111 in various ways. For ease of operation, see [reference needed] in some embodiments. Figure 3 and Figure 6 The extrusion mechanism 11 may also include a pressure plate 1121, which is disposed on the support 4 and rotates relative to the axis of the support 4. A driven wheel 112 is disposed on the pressure plate 1121. A second push block 332 corresponds one-to-one with the pressure plate 1121 of the driven wheel 112. When the second push block 332 abuts against the pressure plate 1121, the second push block 332 is used to push the corresponding pressure plate 1121 to rotate relative to the axis of the support 4, so as to drive the driven wheel 112 to switch between the second standby position and the extrusion position. In the second standby position, the distance between the drive wheel 111 and the driven wheel 112 is greater than the diameter of the consumable to release the consumable 100.

[0093] Specifically, a shaft can be provided on the support 4, and one end of the pressure plate 1121 of the driven wheels 112 of all extrusion mechanisms 11 is rotatably connected to this shaft. The corresponding driven wheels 112 are rotatably connected to one side of the pressure plate 1121. The second actuator 33 is provided on the other side of the pressure plate 1121 so that the second push block 332 pushes the pressure plate 1121 to rotate relative to the support 4, thereby driving the driven wheels 112 to approach the drive wheel 111 and clamp the consumable 100.

[0094] In some embodiments, see Figure 1 and Figure 9The nozzles 2 and extrusion mechanisms 11 are one-to-one correspondences, and the positions of the first pushing block 322 used to push the nozzles 2 and the second pushing block 332 used to push the driven wheel 112 corresponding to the nozzles 2 are corresponding. When the first pushing block 322 pushes the corresponding nozzle 2 to the printing position, the second pushing block 332 corresponding to the position of the first pushing block 322 pushes the corresponding driven wheel 112 to the extrusion position. The extrusion mechanism 11 also includes a pressure plate 1121, which is disposed on the bracket 4 and rotates relative to the bracket 4. 112 is set on the pressure plate 1121, and the second push block 332 corresponds to the pressure plate 1121 one by one; the print head may also include multiple second elastic elements 6. The pressure plate 1121 is connected to the bracket 4 through the second elastic elements 6, and the second elastic elements 6 and the driven wheel 112 are located on the same side of the pressure plate 1121. When the second push block 332 abuts against the pressure plate 1121, the second elastic element 6 is in a compressed state. When the second push block 332 separates from the pressure plate 1121, the second elastic element 6 rebounds and drives the pressure plate 1121 to rotate to the second standby position.

[0095] Alternatively, the extrusion mechanism 11 may further include a pressure plate 1121, which is mounted on and rotatable relative to the support 4. A driven wheel 112 is mounted on the pressure plate 1121, and a second pushing block 332 corresponds to each pressure plate 1121. When the second pushing block 332 abuts against the pressure plate 1121, it pushes the corresponding pressure plate 1121 to rotate relative to the support 4, thereby driving the driven wheel 112 to switch between a second standby position and an extrusion position. In the second standby position, the driving wheel and... The distance between the driven wheels 112 is greater than the diameter of the consumable to release the consumable; the print head may also include a plurality of second elastic elements 6, the pressure plate 1121 is connected to the bracket 4 through the second elastic elements 6, and the second elastic elements 6 and the driven wheels 112 are located on the same side of the pressure plate 1121. When the second pushing block 332 abuts against the pressure plate 1121, the second elastic element 6 is in a compressed state. When the second pushing block 332 separates from the pressure plate 1121, the second elastic element 6 rebounds and drives the pressure plate 1121 to rotate to the second standby position.

[0096] Alternatively, the extrusion assembly 1 may further include a second drive member 12, which includes a second drive body 121, a transmission member 122, and a drive shaft 123. The drive shaft is mounted on the support 4, and the second drive body 121 is connected to the drive shaft 123 via the transmission member 122 to drive the drive shaft 123 to rotate. The drive wheels 111 of the multiple extrusion mechanisms 11 are all mounted on the drive shaft 123 and arranged at intervals along the axial direction of the drive shaft 123. The extrusion mechanism 11 may also include a pressure plate 1121, which is mounted on the support 4 and rotates relative to the support 4. Driven wheel 112 is disposed on pressure plate 1121, and second push block 332 corresponds to pressure plate 1121. Print head may also include multiple second elastic elements 6. Pressure plate 1121 is connected to bracket 4 through second elastic elements 6, and second elastic elements 6 and driven wheel 112 are disposed on the same side of pressure plate 1121. When second push block 332 abuts against pressure plate 1121, second elastic element 6 is in a compressed state. When second push block 332 separates from pressure plate 1121, second elastic element 6 rebounds and drives pressure plate 1121 to rotate to second standby position.

[0097] The second elastic element 6 can be disposed between the pressure plate 1121 and the bracket 4, so that the second elastic element 6 can provide a spring force to the pressure plate 1121 away from the driving wheel 111. When the second pushing block 332 abuts against the pressure plate 1121, the second elastic element 6 is compressed, and the driven wheel 112 moves to the extrusion position; when the second pushing block 332 leaves the pressure plate 1121, the second elastic element 6 restores its deformation, thereby driving the driven wheel 112 to return to the second standby position. Specifically, the second elastic element 6 can be a spring.

[0098] In some embodiments, see Figure 1 , Figure 2 and Figure 5 The extrusion assembly 1 may also include a second drive member 12, which includes a second drive body 121, a transmission member 122 and a drive shaft 123. The drive shaft 123 is rotatably mounted on the bracket 4. The second drive body 121 is connected to the drive shaft 123 through the transmission member 122 to drive the drive shaft 123 to rotate. The drive wheels 111 of the multiple extrusion mechanisms 11 are all mounted on the drive shaft 123 and are arranged at intervals along the axial direction of the drive shaft 123.

[0099] Specifically, the second drive body 121 can be a motor, and the transmission component 122 can include a first gear 1221 and a second gear 1222 that are meshed together. The first gear 1221 is connected to the output shaft of the motor, and the second gear 1222 is connected to the drive shaft 123. When the motor starts, the drive shaft 123 can drive the drive wheel 111 to rotate, so that the drive wheel 111 and the driven wheel 112 cooperate to deliver the consumable 100 into the nozzle 2.

[0100] The first driving element 31 can have various structural forms, as long as it can drive the first actuator 32 and the second actuator 33 to move synchronously.

[0101] For ease of use, see [link to relevant documentation] in some embodiments. Figure 2 and Figure 3 The first driving component 31 may include a first driving body 311, a first worm 312, a second worm 313, a first worm wheel 314, and a second worm wheel 315. The first driving body 311 is connected to the first worm 312, the first worm 312 is connected to the second worm 313, the first worm wheel 314 is meshed with the first worm 312, and the second worm wheel 315 is meshed with the second worm 313. The first driving body 311 drives the first worm 312 and the second worm 313 to rotate simultaneously. The first actuating component 32 is connected to the second worm wheel 315, and the second actuating component 33 is connected to the first worm wheel 314.

[0102] Specifically, the first drive body 311 can be a motor; the first worm 312 and the second worm 313 can be integrally formed. When the motor starts, the first worm 312 and the second worm 313 rotate simultaneously, thereby driving the second rotating shaft 331 to rotate synchronously through the first worm wheel 314 and the second worm wheel 315, thus realizing the synchronous movement of the second actuator 33 and the first actuator 32. The structure is simple and the use is reliable.

[0103] In some embodiments, see Figure 1 and Figure 2 The printhead also includes a support 4, on which the extrusion assembly 1, multiple nozzles 2, and a drive mechanism 3 are respectively mounted; and a detection assembly 7, which is mounted on the support 4, and is used to generate a first feedback signal when the extrusion mechanism 11 stops producing material. The control system of the 3D printer can receive this first feedback signal, thereby realizing the material breakage detection of the printhead.

[0104] In some embodiments, see Figure 1 , Figure 2 and Figure 6 The detection assembly 7 includes multiple detection elements, which correspond to multiple extrusion mechanisms 11. The detection elements may include a detection wheel 71 and a photoelectric sensor 72. The detection wheel 71 is rotatably mounted on the support 4 and has multiple light-transmitting holes in its circumferential direction. The photoelectric sensor 72 is mounted on the support 4 and corresponds to the detection wheel 71. The detection wheel 71 is used to abut against the consumable 100 and rotates as the consumable 100 moves, so that the photoelectric sensor 72 generates a second feedback signal. The detection wheel 71 is also used to stop rotating when it is disengaged from the consumable 100, so that the photoelectric sensor 72 generates a first feedback signal.

[0105] During the start-up of the extrusion mechanism 11, if there is consumable material 100, the detection wheel 71 abuts against the consumable material 100 and rotates as the consumable material 100 moves. Multiple light-transmitting holes rotate accordingly, therefore, the second feedback signal generated by the photoelectric sensor 72 is a changing electrical signal. If there is no consumable material 100, the detection wheel 71 stops rotating, and the positions of the multiple light-transmitting holes remain unchanged. Therefore, the first feedback signal generated by the photoelectric sensor 72 does not change. The control system of the 3D printer can receive the first and second feedback signals and determine that the extrusion mechanism 11 has stopped producing material upon receiving the first feedback signal.

[0106] Specifically, see Figure 6 The detection wheel 71 can be a gear, and multiple detection wheels 71 of the detection components can be connected to the bracket 4 via a rotating shaft. In order to improve the detection accuracy of the detection components, in some embodiments, the detection wheel 71 can be connected to the rotating shaft via a third elastic element 8, such as a torsion spring. The third elastic element 8 is used to provide elastic force for the detection wheel 71 to move towards the consumable 100, thereby improving the reliability of the contact between the detection wheel 71 and the consumable 100, and thus improving the detection accuracy of the detection components.

[0107] This utility model embodiment also provides a 3D printer, including the aforementioned print head.

[0108] The 3D printer provided in this embodiment of the present invention includes a printhead, and therefore has all the beneficial effects of a printhead, which will not be elaborated here.

[0109] Example 1: A printhead, comprising:

[0110] Extrusion assembly 1, which includes a plurality of extrusion mechanisms 11, which are used to convey consumables 100;

[0111] Multiple nozzles 2;

[0112] The drive mechanism 3 is connected to multiple extrusion mechanisms 11 and multiple nozzles 2. The drive mechanism 3 is used to drive one of the nozzles 2 to move to the printing position, and at the same time drive one of the extrusion mechanisms 11 to clamp the consumable 100 to feed the consumable 100 into the nozzle 2 in the printing position.

[0113] Example 2: The printhead based on Example 1,

[0114] The drive mechanism 3 includes a first drive member 31, a first actuator 32, and a second actuator 33. The first actuator 32 and the second actuator 33 are respectively connected to the first drive member 31. The first drive member 31 is used to drive the first actuator 32 and the second actuator 33 to move synchronously.

[0115] The first actuator 32 is driven to connect to a plurality of printheads 2 and is used to drive one of the printheads 2 to move to the printing position;

[0116] The second actuator 33 is driven to connect with a plurality of extrusion mechanisms 11 and is used to drive one of the extrusion mechanisms 11 to clamp the consumable 100.

[0117] Example 3: The printhead according to Example 2 further includes:

[0118] The support 4 and the printhead 2 are mounted on the support 4. The printhead 2 is used to move relative to the support 4 between the first standby position and the printing position. Multiple printheads 2 are arranged at intervals along a straight line.

[0119] The first actuator 32 includes a first rotating shaft 321 and a plurality of first pushing blocks 322. The plurality of first pushing blocks 322 are disposed on the first rotating shaft 321 and are arranged at intervals along the axial direction of the first rotating shaft 321 in a spiral trajectory. The first pushing blocks 322 correspond one-to-one with the nozzle 2.

[0120] The first rotating shaft 321 is connected to the output end of the first driving member 31. The first driving member 31 is used to drive the first rotating shaft 321 to rotate so that one of the first pushing blocks 322 pushes the corresponding nozzle 2 to the printing position.

[0121] Example 4: The printhead according to Example 3 further includes:

[0122] Multiple first elastic elements 5 are provided. The nozzle 2 is connected to the bracket 4 through the first elastic elements 5. The first elastic elements 5 are used to drive the nozzle 2 to move to the first standby position when the first push block 322 leaves the nozzle 2.

[0123] Example 5: The printhead according to Example 3,

[0124] The extrusion mechanism 11 includes a driving wheel 111 and a driven wheel 112 mounted on the support 4, and multiple extrusion mechanisms 11 are arranged at intervals along a straight line;

[0125] The second actuator 33 includes a second rotating shaft 331 and a plurality of second push blocks 332. The plurality of second push blocks 332 are disposed on the second rotating shaft 331 and are arranged at intervals along the axial direction of the second rotating shaft 331 in a spiral trajectory. The second push blocks 332 correspond one-to-one with the driven wheel 112.

[0126] The second rotating shaft 331 is connected to the output end of the first driving member 31. The first driving member 31 is used to drive the second rotating shaft 331 to rotate, so that one of the second pushing blocks 332 pushes the driven wheel 112 corresponding to the second pushing block 332 to the extrusion position.

[0127] When the driven wheel 112 is in the extrusion position, the driving wheel 111 and the driven wheel 112 clamp the consumable 100.

[0128] Example 6: The printhead according to Example 5,

[0129] The nozzle 2 corresponds one-to-one with the extrusion mechanism 11, and the position of the first push block used to push the nozzle 2 corresponds to the position of the second push block used to push the driven wheel corresponding to the nozzle.

[0130] When the first push block 322 pushes the corresponding nozzle 2 to the printing position, the second push block 332, which corresponds to the position of the first push block, pushes the corresponding driven wheel 112 to the extrusion position.

[0131] Example 7: The printhead according to Example 5,

[0132] The extrusion mechanism 11 also includes a pressure plate 1121, which is mounted on the support 4 and rotates relative to the support 4 axis. A driven wheel 112 is mounted on the pressure plate 1121, and a second push block 332 corresponds to the pressure plate 1121.

[0133] When the second push block 332 abuts against the pressure plate 1121, the second push block 332 is used to push the corresponding pressure plate 1121 to rotate relative to the support 4 axis, so as to drive the driven wheel 112 to switch between the second standby position and the extrusion position. In the second standby position, the distance between the drive wheel 111 and the driven wheel 112 is greater than the diameter of the consumable to release the consumable 100.

[0134] Example 8: The printhead according to Example 5,

[0135] The extrusion assembly 1 also includes a second driving member 12, which includes a second driving body 121, a transmission member 122 and a driving shaft 123. The driving shaft 123 is disposed on the bracket 4, and the second driving body 121 is connected to the driving shaft 123 through the transmission member 122 to drive the driving shaft 123 to rotate.

[0136] The drive wheels 111 of the multiple extrusion mechanisms 11 are all located on the drive shaft 123 and are arranged at intervals along the axial direction of the drive shaft 123.

[0137] Example 9: The printhead according to Example 6,

[0138] The extrusion mechanism 11 also includes a pressure plate 1121, which is mounted on the support 4 and rotates relative to the support 4 axis. A driven wheel 112 is mounted on the pressure plate 1121, and a second push block 332 corresponds to the pressure plate 1121.

[0139] The printhead also includes multiple second elastic elements 6. The pressure plate 1121 is connected to the bracket 4 through the second elastic elements 6, and the second elastic elements 6 and the driven wheel 112 are located on the same side of the pressure plate 1121. When the second pushing block 332 abuts against the pressure plate 1121, the second elastic element 6 is in a compressed state. When the second pushing block 332 separates from the pressure plate 1121, the second elastic element 6 rebounds and drives the pressure plate 1121 to rotate to the second standby position.

[0140] Example 10: A printhead according to any one of Examples 2-7,

[0141] The first driving component 31 includes a first driving body 311, a first worm 312, a second worm 313, a first worm wheel 314, and a second worm wheel 315. The first driving body 311 is connected to the first worm 312, the first worm 312 is connected to the second worm 313, the first worm wheel 314 is meshed with the first worm 312, and the second worm wheel 315 is meshed with the second worm 313. The first driving body 311 drives the first worm 312 and the second worm 313 to rotate simultaneously.

[0142] The first actuator 32 is connected to the second worm gear 315, and the second actuator 33 is connected to the first worm gear 314.

[0143] Example 11: The printhead according to Example 1 further includes:

[0144] The support 4, the extrusion assembly 1, multiple nozzles 2 and the drive mechanism 3 are respectively disposed on the support 4;

[0145] The detection component 7 is mounted on the bracket 4 and is used to generate a first feedback signal when the extrusion mechanism 11 stops producing material.

[0146] Example 12: The printhead according to Example 11,

[0147] The detection assembly 7 includes multiple detection elements, which correspond to multiple extrusion mechanisms 11;

[0148] The detection component includes a detection wheel 71 and a photoelectric sensor 72. The detection wheel 71 is rotatably mounted on the bracket 4. The detection wheel 71 has multiple light-transmitting holes in its circumferential direction. The photoelectric sensor 72 is mounted on the bracket 4 and corresponds to the detection wheel 71.

[0149] The detection wheel 71 is used to abut against the consumable 100 and rotate as the consumable 100 moves, so that the photoelectric sensor 72 generates a second feedback signal; the detection wheel 71 is also used to stop rotating when it is disengaged from the consumable 100, so that the photoelectric sensor 72 generates a first feedback signal.

[0150] Example 13: A 3D printer, comprising: a printhead as described in any one of Examples 1 to 12.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not affect the corresponding

[0152] The essence of the technical solutions deviates from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A printhead, characterized in that, include: An extrusion assembly, comprising a plurality of extrusion mechanisms for conveying consumables; Multiple nozzles; A drive mechanism is connected to a plurality of extrusion mechanisms and a plurality of printheads. The drive mechanism is used to drive one of the printheads to move to the printing position, and at the same time drive one of the extrusion mechanisms to clamp the consumable to feed the consumable into the printhead at the printing position.

2. The printhead according to claim 1, characterized in that, The driving mechanism includes a first driving component, a first actuator, and a second actuator. The first actuator and the second actuator are respectively connected to the first driving component. The first driving component is used to drive the first actuator and the second actuator to move synchronously. The first actuator is connected to the plurality of printhead drives for driving one of the printheads to move to the printing position; The second actuator is driven to connect with the plurality of extrusion mechanisms for driving one of the extrusion mechanisms to clamp the consumable.

3. The printhead according to claim 2, characterized in that, Also includes: A bracket, wherein the printhead is disposed on the bracket, and the printhead is used to move relative to the bracket between a first standby position and a printing position, and a plurality of the printheads are arranged at intervals along a straight line; The first actuator includes a first rotating shaft and a plurality of first pushing blocks. The plurality of first pushing blocks are disposed on the first rotating shaft and are arranged at intervals along the axial direction of the first rotating shaft in a spiral trajectory. Each of the first pushing blocks corresponds to a nozzle. The first rotating shaft is connected to the output end of the first driving member, which drives the first rotating shaft to rotate so that one of the first pushing blocks pushes the corresponding printhead to the printing position.

4. The printhead according to claim 3, characterized in that, Also includes: Multiple first elastic elements are provided, and the nozzle is connected to the bracket through the first elastic elements. The first elastic elements are used to drive the nozzle to move to the first standby position when the first push block leaves the nozzle.

5. The printhead according to claim 3, characterized in that, The extrusion mechanism includes a driving wheel and a driven wheel mounted on the support, and multiple extrusion mechanisms are arranged at intervals along a straight line; The second actuator includes a second rotating shaft and a plurality of second pushing blocks. The plurality of second pushing blocks are disposed on the second rotating shaft and are arranged at intervals along the axial direction of the second rotating shaft in a spiral trajectory. Each of the second pushing blocks corresponds to one of the driven wheels. The second rotating shaft is connected to the output end of the first driving member, and the first driving member is used to drive the second rotating shaft to rotate so that one of the second pushing blocks pushes the driven wheel corresponding to the second pushing block to the extrusion position; When the driven wheel is in the extrusion position, the driving wheel and the driven wheel clamp the consumable.

6. The printhead according to claim 5, characterized in that, The nozzles correspond one-to-one with the extrusion mechanism, and the positions of the first push block used to push the nozzles and the second push block used to push the driven wheel corresponding to the nozzles correspond to the positions of the first push block and the second push block corresponding to the first push block push the driven wheel corresponding to the extrusion position. or, The extrusion mechanism further includes a pressure plate, which is disposed on the support and rotates relative to the support. The driven wheel is disposed on the pressure plate, and the second pushing block corresponds to the pressure plate. When the second pushing block abuts against the pressure plate, the second pushing block is used to push the corresponding pressure plate to rotate relative to the support, so as to drive the driven wheel to switch between the second standby position and the extrusion position. In the second standby position, the distance between the driving wheel and the driven wheel is greater than the diameter of the consumable to release the consumable. or, The extrusion assembly further includes a second driving member, which includes a second driving body, a transmission member, and a driving shaft. The driving shaft is disposed on the bracket, and the second driving body is connected to the driving shaft through the transmission member to drive the driving shaft to rotate. The driving wheels of the plurality of extrusion mechanisms are all disposed on the driving shaft and are arranged at intervals along the axial direction of the driving shaft.

7. The printhead according to claim 6, characterized in that, If the nozzles correspond one-to-one with the extrusion mechanism, and the position of the first pushing block used to push the nozzles corresponds to the position of the second pushing block used to push the driven wheel corresponding to the nozzles; when the first pushing block pushes the corresponding nozzle to the printing position, the second pushing block corresponding to the position of the first pushing block pushes the corresponding driven wheel to the extrusion position, the extrusion mechanism further includes a pressure plate, the pressure plate is disposed on the bracket and rotates relative to the bracket, the driven wheel is disposed on the pressure plate, and the second pushing block corresponds one-to-one with the pressure plate; The printhead also includes a plurality of second elastic elements. The pressure plate is connected to the bracket through the second elastic elements, and the second elastic elements and the driven wheel are located on the same side of the pressure plate. When the second pushing block abuts against the pressure plate, the second elastic element is in a compressed state. When the second pushing block separates from the pressure plate, the second elastic element rebounds and drives the pressure plate to rotate to the second standby position. or, If the extrusion mechanism further includes a pressure plate, the pressure plate is disposed on the support and rotates relative to the support, the driven wheel is disposed on the pressure plate, and the second pushing block corresponds to the pressure plate one by one. When the second pushing block abuts against the pressure plate, the second pushing block is used to push the pressure plate corresponding to it to rotate relative to the support, so as to drive the driven wheel to switch between the second standby position and the extrusion position. In the second standby position, the distance between the driving wheel and the driven wheel is greater than the diameter of the consumable to release the consumable. The printhead also includes a plurality of second elastic elements. The pressure plate is connected to the bracket through the second elastic elements, and the second elastic elements and the driven wheel are located on the same side of the pressure plate. When the second pushing block abuts against the pressure plate, the second elastic element is in a compressed state. When the second pushing block separates from the pressure plate, the second elastic element rebounds and drives the pressure plate to rotate to the second standby position. or, If the extrusion assembly further includes a second driving member, the second driving member includes a second driving body, a transmission member and a driving shaft, the driving shaft is disposed on the bracket, the second driving body is connected to the driving shaft through the transmission member to drive the driving shaft to rotate, the driving wheels of the plurality of extrusion mechanisms are all disposed on the driving shaft and arranged at intervals along the axial direction of the driving shaft, the extrusion mechanism further includes a pressure plate, the pressure plate is disposed on the bracket and rotates relative to the bracket, the driven wheel is disposed on the pressure plate, and the second pushing block corresponds to the pressure plate one by one; The printhead also includes a plurality of second elastic elements. The pressure plate is connected to the bracket through the second elastic elements, and the second elastic elements and the driven wheel are located on the same side of the pressure plate. When the second pushing block abuts against the pressure plate, the second elastic element is in a compressed state. When the second pushing block separates from the pressure plate, the second elastic element rebounds and drives the pressure plate to rotate to the second standby position.

8. The printhead according to any one of claims 2-7, characterized in that, The first driving component includes a first driving body, a first worm, a second worm, a first worm wheel, and a second worm wheel. The first driving body is connected to the first worm, the first worm is connected to the second worm, the first worm wheel is meshed with the first worm, and the second worm wheel is meshed with the second worm. The first driving body drives the first worm and the second worm to rotate simultaneously. The first actuator is connected to the second worm gear, and the second actuator is connected to the first worm gear.

9. The printhead according to claim 1, characterized in that, Also includes: The support frame, the extrusion assembly, the plurality of nozzles and the drive mechanism are respectively disposed on the support frame; A detection component is disposed on the bracket and is used to generate a first feedback signal when the extrusion mechanism stops producing material. or, The printhead further includes a support, on which the extrusion assembly, multiple nozzles, and a drive mechanism are respectively disposed; a detection assembly, disposed on the support, is used to generate a first feedback signal when the extrusion mechanism stops producing material; the detection assembly includes multiple detection elements, each corresponding to a multiple extrusion mechanism; each detection element includes a detection wheel and a photoelectric sensor, the detection wheel is rotatably disposed on the support, and has multiple light-transmitting holes on its circumference; the photoelectric sensor is disposed on the support and corresponds to the detection wheel; the detection wheel is used to abut against the consumable material and rotates as the consumable material moves, so that the photoelectric sensor generates a second feedback signal; the detection wheel is also used to stop rotating when it is detached from the consumable material, so that the photoelectric sensor generates the first feedback signal.

10. A three-dimensional printer, characterized in that, include: The printhead as claimed in any one of claims 1 to 9.

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