Printing head assembly and 3D printer

Abstract

According to the printing head assembly and the 3D printer, the cutter assembly is mainly arranged and moves under the action of external force, movable cutting of the cutter assembly can be carried out by means of movement of a printing head body, the weight of the printing head assembly can be reduced, and driving burden and mechanical loss can be reduced. According to the main technical scheme of the printing head assembly, a consumable channel is formed in a printing head body, and the consumable channel is used for allowing consumables to penetrate through; the consumable channel corresponds to at least one cutter assembly, the cutter assembly is movably connected with the printing head body, the cutter assembly comprises a cutting end, the positions of the cutting end comprise an idle position and a cutting position, and the cutter assembly is used for enabling the cutting end to do curvilinear motion under the action of external force so as to move between the idle position and the cutting position to cut off consumables. The 3D printer is mainly used for 3D printing.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a print head assembly and a 3D printer. Background Art

[0002] In a fused deposition modeling 3D printer, an extruder extrudes and conveys a filamentous solid consumable into a print head. The consumable melts into a molten state in the print head and is ejected from a nozzle onto a print platform. By the relative movement of the print head and the print platform, the consumable is coated according to the profile of the model slice.

[0003] When the printing is finished or the consumable needs to be replaced, the original consumable in the print head needs to be retracted. To prevent the molten consumable from moving and adhering and solidifying in the area above the heating block, resulting in an unsmooth consumable channel, the consumable needs to be cut off. In the prior art, a driving mechanism and a cutter are arranged on the print head, and the cutter is driven to move to cut the consumable. For example, in the patent with the publication number CN215550989U, the printing material cutting device includes a steering gear, a cutter and a second driving gear, and the cutter is driven to move to cut the consumable through the steering gear and the driving gear. The setting of the steering gear increases the weight of the print head. The print head moves frequently during printing, increasing the driving burden of the print head, as well as energy consumption and mechanical loss. Summary of the Utility Model

[0004] In view of this, to solve at least one of the above technical problems, the utility model provides a print head assembly and a 3D printer.

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

[0006] On the one hand, the utility model provides a print head assembly, including:

[0007] A print head body, on which a consumable channel is opened for passing through the consumable;

[0008] A cutter assembly, the consumable channel corresponding to the cutter assembly, the cutter assembly being movably connected to the print head body, and the cutter assembly including a cutting end, the position of the cutting end including an idle position and a cutting position;

[0009] The cutter assembly is used to make the cutting end move in a curved line under an external force to move between the idle position and the cutting position to cut off the consumable.

[0010] On the other hand, the utility model further provides a 3D printer, including the X-axis mechanism of any one of the above.

[0011] A print head assembly and a 3D printer proposed by the present utility model. By mainly setting a movable cutter assembly, it plays the role of reducing the weight of the print head assembly, reducing the driving burden and mechanical loss. In the prior art, a driving mechanism and a cutter are set on the print head, and the cutter is driven to move to cut the consumables. The setting of the driving mechanism increases the weight of the print head. During the printing process, the print head moves frequently, increasing the driving burden of the print head, as well as energy consumption and mechanical loss. Compared with the prior art, in this application document, by setting the cutter assembly, the cutter assembly can move under the action of an external force. It can make use of the movement of the print head body to make the cutter assembly move and cut under the action of an additional fixing part, or the cutter assembly can be manually moved as needed, eliminating the need to set a driving part on the print head body, thus playing the role of reducing the weight of the print head assembly, reducing the driving burden and mechanical loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 FIG. 6 is a schematic structural diagram of a print head assembly provided by an embodiment of the present utility model from a first perspective;

[0013] Figure 2 FIG. 10 is a schematic structural diagram of a print head assembly provided by an embodiment of the present utility model from a second perspective;

[0014] Figure 3 FIG. 14 is an exploded structural diagram of a print head assembly provided by an embodiment of the present utility model;

[0015] Figure 4 FIG. 18 is a schematic cross-sectional structural diagram of a print head assembly provided by an embodiment of the present utility model at a first position;

[0016] Figure 5 FIG. 22 is a schematic cross-sectional structural diagram of a print head assembly provided by an embodiment of the present utility model at a second position when the cutting end is in an idle position;

[0017] Figure 6 FIG. 26 is a schematic cross-sectional structural diagram of a print head assembly provided by an embodiment of the present utility model at a second position when the cutting end is in a cutting position;

[0018] Figure 7 FIG. 30 is a schematic structural diagram of a cutter assembly in a print head assembly provided by an embodiment of the present utility model;

[0019] Figure 8 FIG. 34 is a schematic structural diagram of an X-axis mechanism provided by an embodiment of the present utility model from a first perspective;

[0020] Figure 9 FIG. 38 is a schematic structural diagram of an X-axis mechanism provided by an embodiment of the present utility model from a second perspective;

[0021] Figure 10Schematic diagram of an X-axis mechanism provided by an embodiment of the present utility model when the print head assembly is in the acting position. Detailed implementation manners

[0022] To further elaborate on the technical means and effects adopted by the present utility model to achieve the intended utility model purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, detail the specific optional implementation manners, structures, features and their effects of the print head assembly proposed according to the present utility model.

[0023] On the one hand, as Figure 1-6 shown, an embodiment of the present utility model provides a print head assembly, including:

[0024] A print head body 100, on which at least one consumable channel 101 is provided, and the consumable channel 101 is used to pass through the consumable.

[0025] At least one cutter assembly 200, the consumable channel 101 corresponds to at least one cutter assembly 200, the cutter assembly 200 is movably connected to the print head body 100, and the cutter assembly 200 includes a cutting end, and the position of the cutting end includes an idle position and a cutting position.

[0026] The cutter assembly 200 is used to make the cutting end move in a curved motion under an external force to move between the idle position and the cutting position to cut off the consumable.

[0027] The structure of the print head body 100 can be various. For example, in an optional embodiment, the print head body 100 includes a support body 110, and a guide tube 130, a throat 140, a heating block 150 and a nozzle 160 connected to the support body 110 and connected in sequence from top to bottom. The perforations opened on the guide tube 130, the throat 140, the heating block 150 and the nozzle 160 are connected in sequence to form a consumable channel 101. The cutter assembly 200 is connected to the support body 110. The cutter assembly 200 includes a cutting end and an action end. The cutting end is an end of the cutter assembly 200 provided with a cutting member (such as a cutter), such as the blade end of the cutter assembly; the action end is an end of the cutter assembly 200 that contacts an external action member / power member. The cutter assembly 200 can be located above the guide tube 130, or the cutting end corresponds to the upper part of the guide tube 130, and the consumables are cut from the upper part of the guide tube 130. In some other optional embodiments, the print head body 100 further includes an extruder 120, which is connected to the support body 110, and the extruder 120 is located above the material guide tube 130. The support body 110 is provided with perforations corresponding to the material guide tube 130, and the extruder 120 pushes the consumables through the perforations of the support body 110. The perforations provided on the support body 110, the material guide tube 130, the throat 140, the heating block 150 and the nozzle 160 are sequentially connected to form the consumable channel 101. The cutter assembly 200 or the cutting end can be located above the material guide tube 130 and below the extruder 120, and is used to cut the consumables between the extruder 120 and the material guide tube 130. Only a single consumable channel 101 may be opened on the print head body 100, and the number of cutter assemblies 200 may be one. Alternatively, multiple consumable channels 101 may be opened on the print head body 100 to realize the replacement of consumables. The number of cutter assemblies 200 is multiple, and the cutter assemblies 200 are arranged corresponding to the consumable channels 101 to realize the cutting of consumables in the corresponding consumable channels 101 as needed.

[0028] The cutter assembly 200 can be movably connected to the print head body 100 in a variety of ways, so that the cutting end can move when subjected to external force, such as a rotating connection and a sliding connection. The cutting end refers to the end of the cutter assembly 200 that is used to contact and cut the consumables. The thickness of the cutter assembly 200 in the direction close to the cutting end includes a decreasing trend, so that the cutting end presents a flat and sharp blade. The cutting end is located on different sides of the consumable channel 101 in the axial projection of the consumable channel 101 when in the idle position and the cutting position, which refers to different sides of the consumable channel 101 in the circumferential direction. When the cutting end moves between the idle position and the cutting position, it can pass through the consumable channel 101 or the space above the consumable channel 101, or pass through the space where the consumables are located, and then cut off the consumables. The different sides of the consumable channel 101 in the circumferential direction can be two opposite sides in the radial direction, or two adjacent sides. If Figure 5As shown, when in the idle position, the cutting end corresponds to one side of the consumable channel 101, such as Figure 6 As described, when in the cutting position, the cutting end corresponds to the other side of the consumable channel 101. Under the action of an external force, the cutter assembly 200 can drive / push the cutting end to move in a curved path, such that the movement path of the cutting end is an arc or a circular arc. The cutting end moves from the idle position to the cutting position, thereby cutting the consumable located in the consumable channel. The cutting end of the cutter assembly 200 moves in a curved path when cutting the consumable, which is more labor-saving compared to the cutting end moving in a straight line; and during cutting, the resistance suffered by the cutting end moving in a curved path is much smaller than that suffered by the cutting end moving in a straight line, thereby effectively protecting the structural integrity of the cutting end and avoiding adverse situations such as the cutting edge of the cutting end chipping or breaking.

[0029] The implementation manner of the external force acting on the cutter assembly 200 can be various. For example, the cutter assembly 200 can be manually moved as needed, or an additional acting member can be provided to control the movement of the print head body 100 relative to the acting member, such that the acting member pushes the cutter assembly 200 to move. Since the print head body 100 needs to move for printing, the power member for driving the print head body 100 to move is a necessary setting for realizing printing. Therefore, there is no need to additionally provide a power member for driving the cutter assembly 200, and the weight of the print head assembly is not additionally increased, making the driving of the print head assembly more flexible and fast.

[0030] A print head assembly and a 3D printer proposed in an embodiment of the present utility model. By mainly providing a movable cutter assembly, it plays a role in reducing the weight of the print head assembly, reducing the driving burden and mechanical loss. In the prior art, a driving mechanism and a cutter are provided on the print head, and the cutter is driven to move for cutting the consumable. The setting of the driving mechanism increases the weight of the print head. The print head moves frequently during the printing process, increasing the driving burden of the print head, increasing energy consumption and mechanical loss. Compared with the prior art, in the present application document, by providing a cutter assembly, the cutter assembly can move for cutting under the action of an additional fixing member by means of the movement of the print head body, or the cutter assembly can be manually moved as needed, eliminating the need to provide a driving member on the print head body, thereby playing a role in reducing the weight of the print head assembly, reducing the driving burden and mechanical loss.

[0031] In an optional implementation manner, the cutter assembly 200 is rotatably connected to the print head body 100, and the cutter assembly 200 is used to rotate relative to the print head body 100 to switch the cutting end between the idle position and the cutting position.

[0032] In the optional implementation where the cutter assembly 200 moves linearly and relies on driving the print head body 100 to move and uses an additional acting member to move the cutter assembly 200, the force that pushes the cutter assembly 200 to cut the consumable needs to be greater than the external force required to cut the consumable. Since the solid consumable has a certain hardness, a relatively large external force is required to push the cutter assembly 200, which places relatively high requirements on the motor of the driving print head body 100. Compared with the implementation where the cutter assembly 200 moves linearly, the rotational connection can make full use of the moment between the force application point of the cutter assembly 200 and the rotation axis, thereby reducing the force required to push the cutter assembly 200 to cut the consumable, reducing the driving burden on the motor of the driving print head body 100, and then reducing the performance requirements for the motor.

[0033] In an optional implementation, the cutter assembly 200 includes a rotation axis 213 and an acting end for receiving an external force. The rotation axis 213 is located between the acting end and the cutting end. The cutter assembly 200 is rotationally connected to the print head body 100 through the rotation axis 213. The rotation axis 213 is located between the acting end and the cutting end. Compared with the cutting end being located between the acting end and the rotation axis 213, the overall length of the cutter assembly 200 can be reduced, and the space occupied by the cutter assembly 200 can be reduced.

[0034] The acting end of the cutter assembly 200 is used to receive an external force to drive the movement of the cutter assembly 200. This external force can be provided by a power member (such as a motor), or by a user contacting the acting end, or by the cutter assembly 200 moving to contact an external structural member and the external structural member pressing the acting end to generate this external force.

[0035] The cutter assembly 200 is rotationally connected to the print head body 100 through the rotation axis 213. Specifically, the rotation axis 213 is rotationally connected to the print head body 100, and the structure of the cutter assembly 200 other than the rotation axis 213 is fixedly connected to the rotation axis 213; or, the structure of the cutter assembly 200 other than the rotation axis 213 is rotationally connected to the rotation axis 213, and the rotation axis 213 is fixedly connected to the print head body 100; or, it can also be that the structure of the cutter assembly 200 other than the rotation axis 213 is rotationally connected to the rotation axis 213, and the rotation axis 213 is also rotationally connected to the print head body 100.

[0036] In an optional implementation, the cutter assembly includes a rotation axis 213. The cutter assembly 200 is rotationally connected to the print head body 100 through the rotation axis 213; the distance from the rotation axis 213 to the acting end is greater than the distance from the rotation axis 213 to the cutting end; or, the force arm from the rotation axis 213 to the acting end is greater than the force arm from the rotation axis 213 to the cutting end.

[0037] Therefore, it can increase the force arm of the external force applied at the acting end and reduce the force arm of the acting force of the consumable on the cutting end, thereby achieving the effect of reducing the cutting difficulty and the magnitude of the external force required at the acting end.

[0038] In an alternative embodiment, the cutter assembly 200 includes a rotating arm 210 and a cutter 220. The cutter 220 is connected to the rotating arm 210. The rotating arm 210 includes an acting end, and the cutter 220 includes a cutting end. The rotating arm 210 is rotatably connected to the print head body 100.

[0039] The rotating arm 210 is configured to rotate under the action of an external force, and then drive the cutting end of the cutter 220 to move and cut the consumable. The structure of the rotating arm 210 can be various. For example, in an alternative embodiment, the rotating arm 210 is bar-shaped and extends in a single direction. The cutter 220 is disposed on the side surface between the two ends in the length direction of the rotating arm 210. The direction in which the end of the cutter 220 connected to the rotating arm 210 extends to the acting end can be perpendicular to the rotating arm 210, or form an angle close to 90 degrees, so that the moving direction of the cutting end is the same as or has a small angle with the orientation of the cutting end, increasing the cutting force of the cutting end.

[0040] In another alternative embodiment, as Figure 7 shown, the rotating arm 210 includes a first sub-arm 211, a second sub-arm 212, and a rotating shaft 213. The rotating shaft 213 is rotatably connected to the print head body 100. The first sub-arm 211 and the second sub-arm 212 are respectively connected to the rotating shaft 213 and are located on different sides of the rotating shaft 213. The first sub-arm 211 includes an acting end. The cutter 220 is connected to the second sub-arm 212, and the cutter 220 is located on the side of the second sub-arm 212 opposite to the first sub-arm 211. The first sub-arm 211 extends in a first direction, and the extending direction of the second sub-arm 212 is a third direction. The first direction and the third direction form a preset angle.

[0041] The first sub-arm 211 and the second sub-arm 212 can be two regions on the rotating arm 210, that is, the first sub-arm 211 and the second sub-arm 212 can be integrally formed. The preset angle can be not less than 45 degrees and not greater than 180 degrees, and the first sub-arm 211 and the second sub-arm 212 form a structure similar to an L shape. In the embodiment where the rotating arm 210 is straight bar-shaped, the rotating arm 210 needs to be located on one side of the consumable channel 101Y direction, and the rotating arm 210 extends in the X direction, which results in the rotating arm 210 occupying the space in both the Y direction and the X direction at the same time. By setting the first sub-arm 211 and the second sub-arm 212 at a preset angle, the whole rotating arm 210 is located on the same side of the consumable channel 101, such as only on one side of the consumable channel 101 in the X direction, which can make full use of the space on the same side. The direction in which the end of the cutter 220 connected to the second sub-arm 212 extends to the acting end is a second direction. The angle between the third direction and the second direction is greater than or equal to 70 degrees and less than or equal to 90 degrees. With this setting, the cutter 220 moves and cuts along the orientation of the cutting end, and at the same time moves and cuts along the extending direction of the cutting end, that is, cuts at an angle in the inclined direction, and then it is easier to cut off the consumable.

[0042] In an alternative embodiment, the rotating arm 210 further includes a force - applying plate 214, and the force - applying plate 214 is respectively connected to the first sub - arm 211 and the second sub - arm 212.

[0043] The force - applying plate 214 is disposed between the first sub - arm 211 and the second sub - arm 212. For example, the force - applying plate 214 can be a plate - like structure approximately in the shape of a triangle and is located in the area enclosed by the first sub - arm 211 and the second sub - arm 212. The connection area between the force - applying plate 214 and the second sub - arm 212 extends to the end of the second sub - arm 212 far from the rotating shaft 213. Consequently, the reaction force of the cutter 220 on the second sub - arm 212 can be directly applied to the middle area of the first sub - arm 211 through the force - applying plate 214, avoiding excessive force on the rotating shaft 213 and affecting smooth rotation, and making the structure of the rotating arm 210 more stable.

[0044] In an alternative embodiment, the outer wall of the end of the first sub - arm 211 far from the second sub - arm 212 includes a first contact surface 215, and the first contact surface 215 is a bent surface or an arc - shaped surface, which serves to facilitate the application of an external force. This will be described in detail in combination with more specific embodiments below.

[0045] In an alternative embodiment, the cutter 220 is detachably connected to the rotating arm 210, and the cutter 220 can be disassembled, polished, or replaced to ensure the sharpness of the cutter 220. The connection method between the cutter 220 and the rotating arm 210 can be a fixed connection, such as one of plugging, clamping, bonding, or magnetic attraction connection. For example, a groove is provided on the rotating arm 210, and the width of the groove is slightly smaller than the thickness of the cutter 220. The cutter 220 is embedded in the groove and is squeezed and limited.

[0046] In an alternative embodiment, the plane in which the cutter assembly 200 moves between the idle position and the cutting position is perpendicular to the extension direction of the consumable channel 101, and both the cutter 220 and the rotating arm 210 are also arranged in the horizontal direction, thereby cutting the consumable horizontally, making the cross - section of the cut consumable small and reducing the cutting difficulty.

[0047] In an alternative embodiment, the print head assembly further includes an elastic member 300, and the elastic member 300 is connected to the cutter assembly 200 and is used to apply an elastic force to the cutter assembly 200 to move the cutting end from the cutting position to the idle position.

[0048] The elastic member 300 can be a torsion spring, a compression spring, a tension spring, an elastic block made of a flexible material, etc. When the cutter assembly 200 is pushed by an external force to move the cutting end to the cutting position and the cutting is completed, after removing the external force, the cutting end can automatically return to the idle position. At the same time, the elastic member 300 also makes the position of the cutting end stable at the idle position and is not easily displaced without external force.

[0049] In an alternative embodiment, as Figure 5-6 shown, the elastic member 300 is a torsion spring. The two ends of the torsion spring are respectively connected to the cutter assembly 200 and a preset side wall of the print head body 100. The connection method can be abutment or embedded connection. When the cutting end moves from the idle position to the cutting position, the cutter assembly 200 moves close to the preset side wall, squeezing the torsion spring to store energy. In another alternative embodiment, the elastic member 300 is a compression spring. The two ends of the compression spring are respectively connected to the cutter assembly 200 and a preset side wall of the print head body 100. The connection method can be abutment or embedded connection. When the cutting end moves from the idle position to the cutting position, the cutter assembly 200 moves close to the preset side wall, squeezing the compression spring to store energy. In yet another alternative embodiment, the elastic member 300 is a tension spring. The two ends of the tension spring are respectively connected to the cutter assembly 200 and a preset side wall of the print head body 100. The connection method can be an embedded fixed connection. When the cutting end moves from the idle position to the cutting position, the cutter assembly 200 moves away from the preset side wall, stretching the tension spring to store energy.

[0050] In an alternative embodiment, an installation groove 102 is formed on the print head body 100. The installation groove 102 communicates with the consumable material channel 101 and the outside of the print head body 100. At least a part of the cutter assembly 200 is located in the installation groove 102.

[0051] The height of the installation groove 102 can satisfy the sliding abutment of the cutter assembly 200 with the top surface and the bottom surface of the installation groove 102, so that the rotation process of the cutter assembly 200 is stable without trembling or skewing. The width of the installation groove 102 satisfies that the cutter assembly 200 can rotate, so that the cutting end can move between the idle position and the cutting position. The acting end of the cutter assembly 200 can be located in the installation groove 102, and an additional acting member extends into the installation groove 102 to contact the acting end. Or, the acting end can be located outside the installation groove 102, and a specific acting member will be further described in detail below.

[0052] In an alternative embodiment, the print head assembly further includes a sensing member 410 and a triggering member 420. One of the sensing member 410 and the triggering member 420 is connected to the cutter assembly 200, and the other of the sensing member 410 and the triggering member 420 is connected to the print head body 100. The triggering member 420 is at least used to trigger the sensing member 410 to generate a feedback signal when the cutting end moves to the cutting position.

[0053] The feedback signal is used to indicate that the cutting end has moved to the cutting position, that is, the cutting process is completed and the next operation can be carried out. The sensing member 410 can be triggered only when the cutting end moves to the cutting position, or can be triggered separately when the cutting end moves to the cutting position and the idle position, emitting different feedback signals, and then generating a prompt when the cutting end does not return to the idle position due to jamming or the like. For example, the sensing member 410 includes a single magnetic sensor, and the triggering member 420 includes a magnetic member. When the cutting end moves to the cutting position, the magnetic member moves into the sensing range of the magnetic sensor, and then the magnetic sensor is triggered. Or, the sensing member 410 includes two magnetic sensors. When the cutting end moves to the cutting position, the magnetic member moves into the sensing range of the first magnetic sensor, triggering the first magnetic sensor to emit a first feedback signal indicating that the cutting end has moved to the cutting position. When the cutting end moves to the idle position, the magnetic member moves into the sensing range of the second magnetic sensor, triggering the second magnetic sensor to emit a second feedback signal indicating that the cutting end has moved to the idle position. The magnetic sensor can be a Hall sensor. Another example is that the sensing member 410 includes a touch switch, and the triggering member 420 includes an actuating head. When the cutting end moves to the cutting position, the actuating head moves to squeeze the touch switch to close, and then the touch switch is triggered. Or, the sensing member 410 includes two touch switches. When the cutting end moves to the cutting position, the actuating head moves to squeeze the first touch switch to close, triggering the first touch switch to emit a first feedback signal indicating that the cutting end has moved to the cutting position. When the cutting end moves to the idle position, the actuating head moves to squeeze the second touch switch to close, triggering the second touch switch to emit a second feedback signal indicating that the cutting end has moved to the idle position.

[0054] On the other hand, the present utility model further provides a 3D printer, including the print head assembly 10 of any one of the foregoing. The advantages of including the print head assembly 10 of any one of the foregoing will not be elaborated here.

[0055] In an alternative embodiment, as Figure 8-10 shown, the 3D printer further includes an X-axis main body 20, an actuating member 30, and a driving member 40. The print head assembly 10 is movably connected to the X-axis main body 20. The actuating member 30 is connected to the X-axis main body 20. The driving member 40 is respectively connected to the X-axis main body 20 and the print head assembly 10. The position of the print head assembly 10 includes a cutting position. The driving member 40 is used to drive the print head assembly 10 to move along the X-axis main body 20 to an acting position, so that the actuating member 30 pushes the cutter assembly 200 to move. When the print head assembly 10 moves to the acting position, the cutting end is located at the cutting position.

[0056] The X-axis main body 20 may include an X-axis guide rail and a support frame of the driving member 40, etc. The support frame of the driving member 40 is used for movably connecting to the Z-axis guiding and driving mechanism of the 3D printer. The driving member 40 can be connected to the print head assembly 10 through belt drive, etc., such as connecting the support main body 110 of the print head body 100. The print head body 100 can be movably connected to the X-axis guide rail through rollers, etc. The driving member 40 drives the print head body 100 to move along the X-axis guide rail, and then realizes the moving spraying in the X-axis direction relative to the printing platform. The acting member 30 can be fixed on the support frame of the driving member 40. When the driving member 40 drives the print head assembly 10 to move, the position of the acting member 30 remains unchanged, and then the print head assembly 10, or rather the cutter assembly 200, moves relative to the acting member 30, and the movement of the cutter assembly 200 can be realized by the external force of the acting member 30. For example, when driving the print head assembly 10 to move closer to the acting member 30, the cutter assembly 200 with the cutting end in the idle position will gradually approach the acting member 30 until the cutter assembly 200 contacts the acting member 30. Continuing to move the print head assembly 10 in the same direction, the acting member 30 will push the cutter assembly 200 to move, so that the cutting end moves out of the idle position and moves towards the cutting position to cut the consumables until the print head assembly 10 moves to the acting position, and the cutting end will move to the cutting position. At this time, in the above-described embodiment where the print head assembly includes the sensing member 410 and the triggering member 420, the feedback signal of the sensing member 410 will be received, and then the driving of the print head assembly 10 to move towards the acting member 30 can be stopped, and the next operation of the printing process can be carried out. Using the original driving member 40 on the X-axis mechanism to drive the print head assembly 10 to move, and realizing the movement and cutting of the cutter assembly 200, compared with setting a driving member on the print head assembly 10, the weight of the print head assembly 10 can be reduced, and then the mechanical loss and driving burden can be reduced.

[0057] In an alternative embodiment, the acting end of the cutter assembly 200 includes a first contact surface 215, and the acting member 30 includes a second contact surface 31. When the cutting end moves from the idle position to the cutting position, the acting end moves in a preset direction. The first contact surface 215 is used for sliding along the second contact surface 31, and the second contact surface 31 is used for applying a thrust force to the first contact surface 215 to make the acting end move in the preset direction.

[0058] Since the acting member 30 does not move while the cutter assembly 200 rotates, the acting member 30 and the cutter assembly 200 will relatively slide. By setting the first contact surface 215 and the second contact surface 31, the setting directions of the first contact surface 215 and the second contact surface 31 enable the acting member 30 to give a guiding effect to the rotation of the cutter assembly 200 and make the rotation of the cutter assembly 200 smoother. The first contact surface 215 and the second contact surface 31 can be smooth surfaces or rough surfaces. Specifically, in the first embodiment, such as Figure 9-10As shown, when the cutting end moves from the idle position to the cutting position, the acting end moves closer to the X-axis body 20, such as Figure 9 the position shown moves to such as Figure 10 the position shown, the second contact surface 31 faces the X-axis body 20, and in the direction away from the X-axis body 20, it is inclined towards the print head assembly 10. The first contact surface 215 is an arc surface or a bent surface facing away from the X-axis body 20, so that the second contact surface 31 can squeeze the acting end of the cutter assembly 200 in the direction closer to the X-axis body 20, realizing the movement of the cutter assembly 200 to make the cutting end move from the idle position to the cutting position. Or, contrary to the first embodiment, when the cutting end moves from the idle position to the cutting position, the acting end moves away from the X-axis body 20, the second contact surface 31 faces away from the X-axis body 20, and in the direction away from the X-axis body 20, it is inclined away from the print head assembly 10. The first contact surface 215 is an arc surface or a bent surface facing the X-axis body 20, so that the second contact surface 31 can squeeze the acting end of the cutter assembly 200 in the direction away from the X-axis body 20, realizing the movement of the cutter assembly 200 to make the cutting end move from the idle position to the cutting position.

[0059] In an alternative embodiment, the cutter assembly 200 is located in the installation groove 102 of the print head body 100, and the acting member 30 and the cutter assembly 200 interact in the installation groove 102. That is, the acting end of the cutter assembly 200 is located in the installation groove 102, which can avoid the movement of the cutter assembly 200 caused by accidental contact and avoid the accidental cutting of the consumables. Or, at least part of the cutter assembly 200 is located outside the print head body 100, that is, the acting end of the cutter assembly 200 is located outside the installation groove 102, and the acting member 30 and the cutter assembly 200 interact outside the print head body 100, which can increase the length of the cutter assembly 200, increase the force arm of the acting end, and there is no need to provide space for the acting member 30 to extend into the installation groove 102, and then the overall volume of the print head body 100 can be reduced.

[0060] The present utility model also provides the following complete embodiment of a print head assembly:

[0061] A print head assembly includes: a print head body 100, a consumable channel 101 is opened on the print head body 100, and the consumable channel 101 is used to pass through the consumable; a cutter assembly 200, the consumable channel 101 corresponds to the cutter assembly 200, the cutter assembly 200 is movably connected to the print head body 100, the cutter assembly 200 includes a cutting end, and the position of the cutting end includes an idle position and a cutting position; the cutter assembly 200 is used to make the cutting end move in a curved line under an external force to move between the idle position and the cutting position to cut off the consumable.

[0062] Among them, the cutter assembly 200 includes a rotating shaft 213 and an acting end for receiving an external force. The rotating shaft 213 is located between the acting end and the cutting end. The cutter assembly 200 is rotatably connected to the print head body 100 through the rotating shaft 213.

[0063] Among them, the cutter assembly includes a rotating shaft 213. The cutter assembly 200 is rotatably connected to the print head body 100 through the rotating shaft 213; the distance from the rotating shaft 213 to the acting end is greater than the distance from the rotating shaft 213 to the cutting end, or the force arm from the rotating shaft 213 to the acting end is greater than the force arm from the rotating shaft 213 to the cutting end.

[0064] Among them, the cutter assembly 200 includes a rotating arm 210 and a cutter 220. The rotating arm 210 is rotatably connected to the print head body 100. The cutter 220 is connected to the rotating arm 210. The rotating arm 210 includes an acting end, and the cutter 220 includes a cutting end.

[0065] Among them, the rotating arm 210 extends in a single direction; or, the rotating arm 210 includes a first sub-arm 211 and a second sub-arm 212. The first sub-arm 211 and the second sub-arm 212 are respectively connected to the rotating shaft 213 and are located on different sides of the rotating shaft 213. The first sub-arm 211 includes an acting end. The first sub-arm 211 and the second sub-arm 212 form a preset angle. The cutter 220 is connected to the second sub-arm 212, and the cutter 220 is located on the side of the second sub-arm 212 opposite to the first sub-arm 211; the preset angle is not less than 45 degrees and not greater than 180 degrees.

[0066] Among them, when the rotating arm 210 includes a first sub-arm 211 and a second sub-arm 212, the rotating arm 210 further includes a force-applying plate 214. The force-applying plate 214 is respectively connected to the first sub-arm 211 and the second sub-arm 212; the force-applying plate 214 extends to the end of the second sub-arm 212 away from the rotating shaft 213.

[0067] Among them, the outer wall of the end of the first sub-arm 211 away from the second sub-arm 212 includes a first contact surface 215, and the first contact surface 215 is a bent surface or an arc surface.

[0068] Among them, the cutter 220 is detachably connected or fixedly connected to the rotating arm 210; the connection manner between the cutter 220 and the rotating arm 210 is one of plugging, clamping, bonding, and magnetic attraction connection.

[0069] Among them, the plane in which the moving direction of the cutting end between the idle position and the cutting position is located is perpendicular to the extending direction of the consumable channel 101.

[0070] Among them, the print head assembly further includes: an elastic member 300. The elastic member 300 is connected to the cutter assembly 200 and is used to apply an elastic force to the cutter assembly 200 to move the cutting end from the cutting position to the idle position.

[0071] Among them, the elastic member 300 is a torsion spring. The two ends of the torsion spring are respectively connected to the cutter assembly 200 and a preset side wall of the print head body 100. When the cutting end moves from the idle position to the cutting position, the cutter assembly 200 moves close to the preset side wall, squeezing the torsion spring to store energy; or, the elastic member 300 is a compression spring. The two ends of the compression spring are respectively connected to the cutter assembly 200 and a preset side wall of the print head body 100. When the cutting end moves from the idle position to the cutting position, the cutter assembly 200 moves close to the preset side wall, squeezing the compression spring to store energy; or, the elastic member 300 is a tension spring. The two ends of the tension spring are respectively connected to the cutter assembly 200 and a preset side wall of the print head body 100. When the cutting end moves from the idle position to the cutting position, the cutter assembly 200 moves away from the preset side wall, stretching the tension spring to store energy.

[0072] Among them, an installation groove 102 is formed on the print head body 100. The installation groove 102 communicates with the consumable material channel 101 and the outside of the print head body 100, and at least a part of the cutter assembly 200 is located in the installation groove 102.

[0073] Among them, the print head assembly further includes: a sensing member 410 and a triggering member 420. One of the sensing member 410 and the triggering member 420 is connected to the cutter assembly 200, and the other of the sensing member 410 and the triggering member 420 is connected to the print head body 100; the triggering member 420 is at least used to trigger the sensing member 410 to generate a feedback signal when the cutting end moves to the cutting position.

[0074] Among them, the sensing member 410 includes a magnetic sensor, and the triggering member 420 includes a magnetic member; and / or, the sensing member 410 includes a touch switch, and the triggering member 420 includes an acting head.

[0075] The present utility model also provides a complete embodiment of a 3D printer as follows, including a complete embodiment of an upper print head assembly, and further including: an X-axis main body 20, an acting member 30, and a driving member 40. The print head assembly 10 is movably connected to the X-axis main body 20. The acting member 30 is connected to the X-axis main body 20. The driving member 40 is respectively connected to the X-axis main body 20 and the print head assembly 10. The position of the print head assembly 10 includes an acting position; the driving member 40 is used to drive the print head assembly 10 to move along the X-axis main body 20 to the acting position, so that the acting member 30 pushes the cutter assembly 200 to move. When the print head assembly 10 moves to the acting position, the cutting end is located at the cutting position.

[0076] Among them, the cutter assembly 200 includes a first contact surface 215, and the acting member 30 includes a second contact surface 31. When the cutting end moves from the idle position to the cutting position, the acting end of the cutter assembly 200 moves in a preset direction. The first contact surface 215 is used to slide along the second contact surface 31, and the second contact surface 31 is used to apply a thrust force to the first contact surface 215 to make the acting end move in the preset direction. When the cutting end moves from the idle position to the cutting position, the acting end moves closer to the X-axis main body 20, the second contact surface 31 faces the X-axis main body 20, and in the direction away from the X-axis main body 20, it is inclined towards the print head assembly 10. The first contact surface 215 is an arc surface or a bent surface facing away from the X-axis main body 20; or, when the cutting end moves from the idle position to the cutting position, the acting end moves away from the X-axis main body 20, the second contact surface 31 faces away from the X-axis main body 20, and in the direction away from the X-axis main body 20, it is inclined away from the print head assembly 10. The first contact surface 215 is an arc surface or a bent surface facing the X-axis main body 20.

[0077] Among them, the cutter assembly 200 is located in the installation groove 102 of the print head body 100, and the acting member 30 interacts with the cutter assembly 200 in the installation groove 102; or, at least part of the cutter assembly 200 is located outside the print head body 100, and the acting member 30 interacts with at least the cutter assembly 200 located outside the print head body 100.

[0078] The present utility model also provides the following embodiments:

[0079] Reference numeral 1, A print head assembly, comprising:

[0080] A print head body 100, on which a consumable channel 101 is provided, and the consumable channel 101 is used to pass through the consumable;

[0081] A cutter assembly 200, the consumable channel 101 corresponds to the cutter assembly 200, the cutter assembly 200 is movably connected to the print head body 100, and the cutter assembly 200 includes a cutting end, and the position of the cutting end includes an idle position and a cutting position;

[0082] The cutter assembly 200 is used to make the cutting end perform a curvilinear motion under an external force to move between the idle position and the cutting position to cut off the consumable.

[0083] Reference numeral 2, The print head assembly according to reference numeral 1, wherein,

[0084] The cutter assembly 200 is rotatably connected to the print head body 100, and the cutter assembly 200 is used to rotate relative to the print head body 100 to switch the cutting end between the idle position and the cutting position.

[0085] Reference numeral 3, The print head assembly according to reference numeral 1, wherein,

[0086] The cutter assembly 200 includes a rotating shaft 213 and an acting end for receiving an external force. The rotating shaft 213 is located between the acting end and the cutting end. The cutter assembly 200 is rotatably connected to the print head body 100 through the rotating shaft 213.

[0087] Label 4. The print head assembly according to Label 1, wherein

[0088] The cutter assembly includes a rotating shaft 213. The cutter assembly 200 is rotatably connected to the print head body 100 through the rotating shaft 213;

[0089] The distance from the rotating shaft 213 to the acting end is greater than the distance from the rotating shaft 213 to the cutting end;

[0090] Or, the force arm from the rotating shaft 213 to the acting end is greater than the force arm from the rotating shaft 213 to the cutting end.

[0091] Label 5. The print head assembly according to Label 3, wherein

[0092] The cutter assembly 200 includes a rotating arm 210 and a cutter 220. The rotating arm 210 is rotatably connected to the print head body 100. The cutter 220 is connected to the rotating arm 210. The rotating arm 210 includes an acting end, and the cutter 220 includes a cutting end.

[0093] Label 6. The print head assembly according to Label 5, wherein

[0094] The rotating arm 210 extends in a single direction;

[0095] Or, the rotating arm 210 includes a first sub-arm 211 and a second sub-arm 212. The first sub-arm 211 and the second sub-arm 212 are respectively connected to the rotating shaft 213 and are located on different sides of the rotating shaft 213. The first sub-arm 211 includes an acting end. The first sub-arm 211 and the second sub-arm 212 form a preset angle. The cutter 220 is connected to the second sub-arm 212, and the cutter 220 is located on the side of the second sub-arm 212 opposite to the first sub-arm 211;

[0096] The preset angle is not less than 45 degrees and not more than 180 degrees.

[0097] Label 7. The print head assembly according to Label 6, wherein

[0098] When the rotating arm 210 includes a first sub-arm 211 and a second sub-arm 212, the rotating arm 210 further includes a force application plate 214. The force application plate 214 is respectively connected to the first sub-arm 211 and the second sub-arm 212;

[0099] The force application plate 214 extends to the end of the second sub-arm 212 away from the rotating shaft 213.

[0100] Label 8. The print head assembly according to Label 6, wherein

[0101] One end outer wall of the first sub-arm 211 away from the second sub-arm 212 includes a first contact surface 215, and the first contact surface 215 is a bent surface or an arc surface.

[0102] Label 9. The print head assembly according to Label 5, wherein

[0103] The cutter 220 is detachably or fixedly connected to the rotating arm 210;

[0104] Alternatively, the connection mode between the cutter 220 and the rotating arm 210 is one of plug connection, snap connection, bonding, and magnetic attraction connection.

[0105] Label 10. The print head assembly according to Label 1, wherein

[0106] The plane where the moving direction of the cutting end is located between the idle position and the cutting position is perpendicular to the extending direction of the consumable channel 101.

[0107] Label 11. The print head assembly according to Label 1, wherein the print head assembly further includes:

[0108] An elastic member 300, which is connected to the cutter assembly 200 and is used to apply an elastic force to the cutter assembly 200 to move the cutting end from the cutting position to the idle position.

[0109] Label 12. The print head assembly according to Label 1, wherein

[0110] The elastic member 300 is a torsion spring, and both ends of the torsion spring are respectively connected to the cutter assembly 200 and a preset side wall of the print head body 100. When the cutting end moves from the idle position to the cutting position, the cutter assembly 200 moves close to the preset side wall and squeezes the torsion spring for energy storage;

[0111] Alternatively, the elastic member 300 is a compression spring, and both ends of the compression spring are respectively connected to the cutter assembly 200 and a preset side wall of the print head body 100. When the cutting end moves from the idle position to the cutting position, the cutter assembly 200 moves close to the preset side wall and squeezes the compression spring for energy storage;

[0112] Alternatively, the elastic member 300 is a tension spring, and both ends of the tension spring are respectively connected to the cutter assembly 200 and a preset side wall of the print head body 100. When the cutting end moves from the idle position to the cutting position, the cutter assembly 200 moves away from the preset side wall and stretches the tension spring for energy storage.

[0113] Label 13. The print head assembly according to Label 1, wherein

[0114] An installation groove 102 is formed in the print head body 100. The installation groove 102 communicates with the consumable channel 101 and the outside of the print head body 100, and at least a part of the cutter assembly 200 is located in the installation groove 102.

[0115] Reference numeral 14. A print head assembly according to reference numeral 1, wherein the print head assembly further comprises:

[0116] A sensing member 410 and a triggering member 420, one of the sensing member 410 and the triggering member 420 is connected to the cutter assembly 200, and the other of the sensing member 410 and the triggering member 420 is connected to the print head body 100;

[0117] The triggering member 420 is at least used for triggering the sensing member 410 to generate a feedback signal when the cutting end moves to the cutting position.

[0118] Reference numeral 15. A print head assembly according to reference numeral 1, wherein,

[0119] The sensing member 410 comprises a magnetic sensor, and the triggering member 420 comprises a magnetic member;

[0120] And / or, the sensing member 410 comprises a touch switch, and the triggering member 420 comprises an acting head.

[0121] Reference numeral 16. A 3D printer, which comprises a print head assembly 10 according to any one of the above reference numerals 1-15.

[0122] Reference numeral 17. A 3D printer according to reference numeral 16, wherein the 3D printer further comprises:

[0123] An X-axis main body 20, an acting member 30 and a driving member 40. The print head assembly 10 is movably connected to the X-axis main body 20. The acting member 30 is connected to the X-axis main body 20. The driving member 40 is respectively connected to the X-axis main body 20 and the print head assembly 10. The position of the print head assembly 10 includes an acting position;

[0124] The driving member 40 is used for driving the print head assembly 10 to move along the X-axis main body 20 to the acting position, so that the acting member 30 pushes the cutter assembly 200 to move. When the print head assembly 10 moves to the acting position, the cutting end is located at the cutting position.

[0125] Reference numeral 18. A 3D printer according to reference numeral 17, wherein,

[0126] The cutter assembly 200 comprises a first contact surface 215, and the acting member 30 comprises a second contact surface 31. When the cutting end moves from the idle position to the cutting position, the acting end of the cutter assembly 200 moves in a preset direction. The first contact surface 215 is used for sliding along the second contact surface 31, and the second contact surface 31 is used for applying a thrust force to the first contact surface 215 to make the acting end move in the preset direction;

[0127] When the cutting end moves from the idle position to the cutting position, the acting end moves closer to the X-axis main body 20, the second contact surface 31 faces the X-axis main body 20, and in the direction away from the X-axis main body 20, it inclines towards the print head assembly 10, and the first contact surface 215 is an arc surface or a bent surface facing away from the X-axis main body 20;

[0128] Alternatively, when the cutting end moves from the idle position to the cutting position, the acting end moves away from the X-axis main body 20, the second contact surface 31 faces away from the X-axis main body 20, and in the direction away from the X-axis main body 20, it inclines away from the print head assembly 10, and the first contact surface 215 is an arc surface or a bent surface facing the X-axis main body 20.

[0129] Reference numeral 19, a 3D printer according to reference numeral 17, wherein,

[0130] The cutter assembly 200 is located in the installation groove 102 of the print head body 100, and the acting member 30 interacts with the cutter assembly 200 in the installation groove 102;

[0131] Alternatively, at least part of the cutter assembly 200 is located outside the print head body 100, and the acting member 30 interacts with at least the cutter assembly 200 located outside the print head body 100.

[0132] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the said claims.

Claims

1. A print head assembly, characterized in that: include: A print head body, wherein a consumables channel is provided on the print head body, and the consumables channel is used for passing consumables; A cutter assembly, the consumable material channel corresponds to the cutter assembly, the cutter assembly is movably connected to the print head body, the cutter assembly includes a cutting end, and the position of the cutting end includes an idle position and a cutting position; The cutter assembly is used to make the cutting end move in a curve under the action of an external force, so as to move between the idle position and the cutting position to cut off the consumable material.

2. The print head assembly according to claim 1, characterized in that: The cutter assembly is rotatably connected to the print head body, and the cutter assembly is used to rotate relative to the print head body so that the cutting end switches between the idle position and the cutting position.

3. The print head assembly according to claim 1, characterized in that: The cutter assembly comprises a rotating shaft and an acting end for receiving external force, the rotating shaft is located between the acting end and the cutting end, and the cutter assembly is rotatably connected to the print head body via the rotating shaft.

4. The print head assembly according to claim 1, characterized in that: The cutter assembly comprises a rotating shaft, and the cutter assembly is rotatably connected to the print head body via the rotating shaft; The distance from the rotating shaft to the action end is greater than the distance from the rotating shaft to the cutting end; Alternatively, the lever arm from the rotating shaft to the action end is greater than the lever arm from the rotating shaft to the cutting end.

5. The print head assembly according to claim 3, characterized in that: The cutter assembly comprises a rotating arm and a cutter, wherein the rotating arm is rotatably connected to the print head body, the cutter is connected to the rotating arm, the rotating arm comprises the action end, and the cutter comprises the cutting end.

6. The print head assembly according to claim 5, characterized in that: The rotating arm extends in a single direction; Alternatively, the rotating arm comprises a first sub-arm and a second sub-arm, the first sub-arm and the second sub-arm are respectively connected to the rotating shaft and are located on different sides of the rotating shaft, the first sub-arm comprises the action end, the first sub-arm and the second sub-arm form a preset angle, the cutter is connected to the second sub-arm, and the cutter is located on a side of the second sub-arm opposite to the first sub-arm; The preset angle is not less than 45 degrees and not more than 180 degrees.

7. The print head assembly according to claim 6, wherein: When the rotating arm includes a first sub-arm and a second sub-arm, the rotating arm further includes a force application plate, and the force application plate is connected to the first sub-arm and the second sub-arm respectively; The force applying plate extends to an end of the second sub-arm away from the rotating shaft.

8. The print head assembly according to claim 6, characterized in that: An outer wall of one end of the first sub-arm away from the second sub-arm comprises a first contact surface, and the first contact surface is a bent surface or an arc-shaped surface.

9. The print head assembly according to claim 5, characterized in that: The cutter is detachably connected or fixedly connected to the rotating arm; Alternatively, the cutter and the rotating arm are connected in a manner of plug-in connection, clip-on connection, adhesive connection, or magnetic connection.

10. The print head assembly according to claim 1, wherein: A plane in which the cutting end moves between the idle position and the cutting position is perpendicular to an extension direction of the consumables channel.

11. The print head assembly according to claim 1, characterized in that: The print head assembly also includes: An elastic member is connected to the cutter assembly and is used to apply elastic force to the cutter assembly to move the cutting end from the cutting position to the idle position.

12. The print head assembly according to claim 11, characterized in that: The elastic member is a torsion spring, and the two ends of the torsion spring are respectively connected to the cutter assembly and the preset side wall of the print head body. When the cutting end moves from the idle position to the cutting position, the cutter assembly moves close to the preset side wall to squeeze the torsion spring to store energy. Alternatively, the elastic member is a pressure spring, the two ends of which are respectively connected to the cutter assembly and a preset side wall of the print head body, and when the cutting end moves from the idle position to the cutting position, the cutter assembly moves close to the preset side wall to squeeze the pressure spring to store energy; Alternatively, the elastic member is a tension spring, the two ends of which are respectively connected to the cutter assembly and the preset side walls of the print head body, and when the cutting end moves from the idle position to the cutting position, the cutter assembly moves away from the preset side wall, stretching the tension spring to store energy.

13. The print head assembly according to claim 1, wherein: The print head body is provided with a mounting groove, the mounting groove is communicated with the consumable material channel and the outside of the print head body, and the cutter assembly is at least partially located in the mounting groove.

14. The print head assembly according to claim 1, wherein: The print head assembly also includes: A sensing member and a triggering member, one of which is connected to the cutter assembly, and the other of which is connected to the print head body; The triggering member is at least used for triggering the sensing member to generate a feedback signal when the cutting end moves to the cutting position.

15. The print head assembly according to claim 14, wherein: The sensing element includes a magnetic sensor, and the triggering element includes a magnetic element; And / or, the sensing element includes a touch switch, and the triggering element includes an action head.

16. A 3D printer, characterized in that: The invention comprises a print head assembly as claimed in any one of claims 1 to 15.

17. The 3D printer according to claim 16, characterized in that: The 3D printer also includes: An X-axis body, an action member and a driving member, the print head assembly is movably connected to the X-axis body, the action member is connected to the X-axis body, the driving member is respectively connected to the X-axis body and the print head assembly, and the position of the print head assembly includes an action position; The driving member is used to drive the print head assembly to move along the X-axis body to the action position, so that the action member pushes the cutter assembly to move. When the print head assembly moves to the action position, the cutting end is located at the cutting position.

18. The 3D printer according to claim 17, characterized in that: The cutter assembly includes a first contact surface, and the action member includes a second contact surface. When the cutting end moves from the idle position to the cutting position, the action end of the cutter assembly moves in a preset direction. The first contact surface is used to slide along the second contact surface, and the second contact surface is used to apply a thrust to the first contact surface to make the action end move in the preset direction. When the cutting end moves from the idle position to the cutting position, the active end moves close to the X-axis body, the second contact surface faces the X-axis body, and is inclined toward the print head assembly in a direction away from the X-axis body, and the first contact surface is an arcuate surface or a bent surface facing away from the X-axis body; Alternatively, when the cutting end moves from the idle position to the cutting position, the active end moves away from the X-axis body, the second contact surface is opposite to the X-axis body, and is inclined away from the print head assembly in a direction away from the X-axis body, and the first contact surface is an arcuate surface or a bent surface facing the X-axis body.

19. The 3D printer according to claim 17, characterized in that: The cutter assembly is located in the mounting slot of the print head body, and the action member interacts with the cutter assembly in the mounting slot; Alternatively, at least part of the cutter assembly is located outside the print head body, and the actuator interacts with at least the cutter assembly located outside the print head body.

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