Cutter device, printing head device and three-dimensional forming equipment

Abstract

The utility model discloses a cutter device and three-dimensional forming equipment, which are mainly characterized in that a first limiting part moves to a fixed position and is matched with a printing head to limit the movement of a cutter assembly, and the first limiting part moves to an abdicating position, so that the cutter assembly can be separated from the printing head, and a cutter can be conveniently overhauled or replaced. According to the main technical scheme, the cutter device comprises a cutter assembly and a limiting unit, the limiting unit is connected with the cutter assembly, and the limiting unit comprises a first limiting part; the position of the first limiting part relative to the fixing unit comprises a fixing position and a receding position, the first limiting part is used for moving between the fixing position and the receding position under the action of external force, and when the first limiting part is located at the fixing position, the first limiting part is used for being matched with the fixing unit to limit the moving range of the cutter assembly; when the first limiting part is located at the receding position, the first limiting part at least makes receding for the cutter assembly to move and break away from the printing head. The cutting tool is mainly used for cutting consumables.

Description

Technical Field

[0001] The utility model relates to the technical field of additive manufacturing, in particular to a cutting tool device, a print head device and a three-dimensional forming device. Background Art

[0002] In a three-dimensional forming device, consumables are fed in a filamentous form. After passing through an extruder, the consumables are introduced into a print head. During the printing process, the extruder continuously transfers the consumables into the print head, where the consumables are melted and then ejected onto a printing platform. In a three-dimensional forming device with replaceable materials, when replacing the materials, a cutting tool on the print head is used to cut off the original consumables in the print head, and then the original consumables are drawn out of the print head. The molten section of the original consumables remains in the print head to prevent the print head from being blocked due to the movement of the molten consumables in the print head.

[0003] In the prior art, the cutting tool is fixedly installed in the print head through structures such as screws and is surrounded by other structural parts, resulting in inconvenient disassembly of the cutting tool. In the case where the cutting tool has residual consumable debris after long-term use or the cutting edge becomes dull, etc., it is impossible to perform timely maintenance. 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 cutting tool device, a print head device and a three-dimensional forming device.

[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 cutting tool device for a three-dimensional forming device. The three-dimensional forming device includes a print head, and the print head includes a fixing unit. The cutting tool device includes:

[0007] A cutting tool assembly and a limiting unit, the limiting unit is connected to the cutting tool assembly, and the limiting unit includes a limiting portion;

[0008] The position of the limiting portion relative to the fixing unit includes a fixed position and a yielding position. The limiting portion is used to move between the fixed position and the yielding position under the action of an external force. When the limiting portion is located at the fixed position, the limiting portion is used to cooperate with the fixing unit to limit the movement range of the cutting tool assembly. When the limiting portion is in the yielding position, the limiting portion at least yields for the cutting tool assembly to move out of the print head.

[0009] On the other hand, the utility model further provides a print head device, including the cutting tool device according to any one of the above and a print head. The cutting tool device is connected to the print head, and the print head is used for threading the consumables.

[0010] On yet another hand, the utility model further provides a three-dimensional forming device, including the print head device according to any one of the above.

[0011] The utility model proposes a cutter device, a print head device and a three-dimensional forming device, which are mainly provided with a limit unit. An external force can be applied to the limit unit or the first limit portion, so that the first limit portion is moved to a fixed position, and then cooperates with the print head to move the cutter assembly within a certain range, thereby realizing the installation of the cutter assembly. When the cutter assembly needs to be disassembled, the first limit portion is moved to a yielding position by an external force, so that the cutter assembly can be separated from the print head, thereby realizing the disassembly of the cutter assembly and facilitating the inspection or replacement of the cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic structural diagram of a cutting device provided by an embodiment of the utility model at a first viewing angle;

[0013] Figure 2 A schematic structural diagram of a cutting device provided by an embodiment of the utility model at a second viewing angle;

[0014] Figure 3 A schematic structural diagram of a cutter provided by an embodiment of the utility model at a first viewing angle;

[0015] Figure 4 A schematic structural diagram of a cutter provided by an embodiment of the utility model at a second viewing angle;

[0016] Figure 5 A schematic diagram of an exploded structure of a print head device provided by an embodiment of the utility model at a first viewing angle;

[0017] Figure 6 A schematic diagram of an exploded structure of a print head device provided by an embodiment of the utility model at a second viewing angle;

[0018] Figure 7 A schematic diagram of an exploded structure of a print head device provided by an embodiment of the utility model at a third viewing angle;

[0019] Figure 8 A schematic diagram of the structure of a print head device provided by an embodiment of the utility model when the cutter is located at a restricted position;

[0020] Figure 9 A schematic cross-sectional structure diagram of a print head device provided by an embodiment of the utility model at a first viewing angle when a cutter is located at a restricted position;

[0021] Figure 10 A schematic cross-sectional structure diagram of a print head device provided by an embodiment of the utility model when a cutter is located at a cutting position at a first viewing angle;

[0022] Figure 11 A schematic cross-sectional structure diagram of a print head device provided by an embodiment of the utility model at a second viewing angle when a cutter is located at a restricted position;

[0023] Figure 12 A schematic cross-sectional structure view of a print head device provided by an embodiment of the present invention at a second viewing angle when the cutting knife is in a cutting position;

[0024] Figure 13 A schematic structure view of another cutting knife device provided by an embodiment of the present invention when the cutting knife is in a cutting position;

[0025] Figure 14 A schematic structure view of another cutting knife device provided by an embodiment of the present invention when the cutting knife is in a limiting position;

[0026] Figure 15 A schematic structure view of another print head device provided by an embodiment of the present invention. Specific embodiments

[0027] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended utility model purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific optional implementation manners, structures, features, and their effects of the cutting knife device proposed according to the present invention as follows.

[0028] The embodiments of the present invention provide, for achieving the above object, the following main technical solutions:

[0029] On the one hand, as shown in FIGS. Figure 1-2 13 - 14, the present invention provides a cutting knife device for a three-dimensional forming device. The three-dimensional forming device includes a print head 400, and the print head 400 includes a fixing unit 410. The cutting knife device includes:

[0030] A cutting knife assembly 100 and a limiting unit 200. The limiting unit 200 is connected to the cutting knife assembly 100, and the limiting unit 200 includes a limiting portion 210;

[0031] The position of the limiting portion 210 relative to the fixing unit 410 includes a fixed position and a yielding position. The limiting portion 210 is configured to move between the fixed position and the yielding position under the action of an external force. When the limiting portion 210 is in the fixed position, the limiting portion 210 is used to cooperate with the fixing unit 410 to limit the moving range of the cutting knife assembly 100. When the limiting portion 210 is in the yielding position, the limiting portion 210 at least yields for the cutting knife assembly 100 to move away from the print head.

[0032] The print head 400 of the three-dimensional forming device includes a consumable material channel. After the consumable material is led out by an extruder, it passes through the consumable material channel. The print head 400 is used to heat the consumable material and spray the consumable material onto the printing platform through a nozzle. At least one side of the consumable material channel away from the nozzle in the melting section has a relief opening. The cutter assembly 100 is opposite to the relief opening. The cutter assembly 100 is used to move relative to the print head 400 after the current consumable material printing is completed, and cut the consumable material through the relief opening of the consumable material channel, so as to leave the melted part of the consumable material in the consumable material channel.

[0033] The limiting unit 200 further includes a base member 220. The limiting portion 210 and the base member 220 may be movably connected. The limiting portion 210 is used to move relative to the base member 220 to move between a fixed position and a relief position. The limiting portion 210 may be directly connected to the base member 220, or indirectly connected to the base member 220 through other components of the limiting unit 200. The position of the limiting portion 210 may refer to the overall position of the limiting portion 210. For example, the limiting portion 210 and the base member 220 may be movably connected, such as rotatably connected, slidably connected or elastically connected, etc., and the switching between the fixed position and the relief position is achieved by changing the overall position of the limiting portion 210. Or, the position of the limiting portion 210 may refer to only the local position of the limiting portion 210. For example, the limiting portion 210 has elasticity itself. The limiting portion 210 may be fixedly connected to the base member 220. The limiting portion 210 includes an acting end. The position of the acting end includes a fixed position and a relief position. The acting end is used to cooperate with the print head 400 for limiting and relieving. The acting end is switched between the fixed position and the relief position under the action of an external force through the elasticity of the limiting portion 210 itself. Or, it may also be that the limiting portion 210 is connected to the base member 220, and the relative position of the limiting portion 210 and the base member 220 is fixed. The base member 220 is used to move relative to the fixing unit 410, that is, through the overall movement of the base member 220 or the limiting unit 200, so that the limiting portion 210 moves between the fixed position and the relief position. Or, it may also be that the limiting portion 210 is fixedly connected to the base member 220, the base member 220 has elasticity itself, and the base member 220 moves relative to the fixing unit 410 partially through its own deformation, so that the limiting portion 210 moves.

[0034] When the limiting part 210 is in the fixed position, it can cooperate with the fixing unit 410 to completely fix the relative positions of the limiting unit 200 and the print head 400. When cutting the consumable, the position of the limiting unit 200 remains unchanged, and the cutter assembly 100 moves relative to the print head 400 to achieve the cutting of the consumable. Alternatively, it can also be that when the limiting part 210 is in the fixed position, it cooperates with the print head 400 to limit the limiting unit 200 within a certain moving range. When cutting the consumable, the overall position of the limiting unit 200 moves within the moving range, and then drives the cutter assembly 100 to move to achieve the cutting of the consumable. The following text will further elaborate on these two alternative implementation manners. When the limiting part 210 is in the yielding position, the restriction of the limiting part 210 on the moving range of the cutter assembly 100 or rather the limiting unit 200 is released, and then the cutter assembly 100 can be moved by an external force to remove the cutter assembly 100 from the print head 400. Alternatively, when installing the cutter assembly 100, the limiting part 210 will move to the yielding position under the action of an external force, and then the cutter assembly 100 or rather the limiting unit 200 can be installed in place, and then the limiting part 210 is released to the fixed position. Thus, the disassembly and assembly of the cutter assembly 100 are facilitated.

[0035] According to the different specific structures and connection methods of the limiting part 210, there can be various ways to apply an external force to realize the switching of the limiting part 210 between the fixed position and the yielding position. For example, the limiting part 210 can be rotatably connected or slidably connected to the base member 220, and the switching between the fixed position and the yielding position is realized by manually rotating or pushing the limiting part 210. Or, in the alternative embodiment where the aforementioned limiting part 210 is fixedly connected to the base member 220 and the movement of the base member 220 drives the limiting part 210, the limiting unit 200 can further include a first elastic member. The first elastic member is connected to at least the base member 220, and the first elastic member is used to apply an external force to the base member 220 to drive the limiting part 210 to move to the fixed position. Then, by rotating or pushing the base member 220 to move, the limiting part 210 can be moved to the yielding position. After the external force is removed, the first elastic member causes the base member 220 to move, driving the limiting part 210 to the fixed position. Or, in the alternative embodiment where the aforementioned base member 220 itself has elasticity, by pushing the limiting part 210 or the base member 220, the base member 220 deforms, causing the limiting part 210 to move to the yielding position. After the external force is removed, the base member 220 automatically restores its shape by its own elastic force, and the limiting part 210 moves to the fixed position. Or, in the alternative embodiment where the aforementioned limiting part 210 itself has elasticity, after manually pushing the limiting part 210 to deform and move to the yielding position, and the external force is removed, the limiting part 210 can automatically return to the fixed position by its own elastic force. Or, when the limiting part 210 is indirectly connected to the base member 220 through other components in the limiting unit 200, the limiting unit 200 can further include a second elastic member 230. The second elastic member 230 is connected to the base member 220, and the limiting part 210 is connected to the second elastic member 230. The second elastic member 230 applies an external force to the limiting part 210 to drive the limiting part 210 to move to the fixed position. The limiting part 210 is used to move to the yielding position under the action of an external force. For example, by directly manually pressing the limiting part 210 or indirectly pressing the limiting part 210 through other component structures, the limiting part 210 is moved to the yielding position. When the external force is removed, the second elastic member 230 rebounds and restores its shape, applying an elastic force to the limiting part 210, causing the limiting part 210 to automatically rebound to the fixed position.

[0036] A cutting tool device, a print head device and a three-dimensional forming device proposed by the present utility model mainly set a first limiting part. By applying an external force to the first limiting part or the base member of the limiting unit, the first limiting part can be moved to the fixed position, and then cooperate with the print head to enable the cutting tool assembly to move within a certain range, realizing the installation of the cutting tool assembly. When it is necessary to disassemble the cutting tool assembly, the first limiting part is moved to the yielding position by an external force, so that the cutting tool assembly can be separated from the print head, realizing the disassembly of the cutting tool assembly, and then facilitating the maintenance or replacement of the cutting tool.

[0037] The cutter assembly 100 can move in various ways. For example, in an alternative embodiment, as Figure 13-14 shown, the cutter assembly 100 and the limiting unit 200 can be movably connected. The cutter assembly 100 includes a blade end, a force application end, and a rotating part. The blade end is used to contact the consumable. The cutter assembly 100 is rotatably connected to the limiting unit 200 through the rotating part. For example, the cutter assembly 100 is embedded in the base member 220 of the limiting unit 200. The force application end and the blade end are respectively on two sides of the cutter assembly 100 that are away from each other. The force application end is exposed outside the base member 220 and is used to apply an external force that causes the cutter assembly 100 to move. When the cutter assembly 100 moves, the blade end of the cutter assembly 100 can be selectively exposed outside the base member 220, and through the rotation of the cutter assembly 100, the cutting of the consumable by the cutter assembly 100 is achieved. The rotating part can be located between the blade end and the force application end, thereby reducing the movement amplitude of the force application end.

[0038] Alternatively, in another alternative embodiment, as Figure 1-2 shown, the cutter assembly 100 and the limiting unit 120 or rather the base member 220 can be fixedly connected. The cutter assembly 100 includes a blade end, which is used to contact the consumable. The blade end of the cutter assembly 100 is exposed outside the base member 220 of the limiting unit 120. One end of the cutter assembly 100 away from the blade end is embedded in the base member 220 of the limiting unit 120. Through the overall movement of the cutter assembly 100 and the limiting unit 120, the cutting of the consumable by the cutter assembly 100 is achieved. In the alternative embodiment where the cutter assembly 100 and the limiting unit 120 are rotatably connected, to ensure that the cutter assembly 100 rotates and cuts while reducing the requirement for external force, the distance from the force application end to the rotating shaft is usually long, resulting in a large rotation amplitude of the force application end and a large occupied space. However, when the cutter assembly 100 moves as a whole to cut the consumable, only the displacement required by the blade end during the cutting of the consumable needs to be satisfied, and thus the occupied space required for the movement can be reduced.

[0039] The cutter assembly 100 can be integrally formed, such as only including a cutter with a blade. Or, in an alternative embodiment, as Figure 1-2 shown, the cutter assembly 100 includes a cutter 110 and a cutter housing 120. The cutter 110 is connected to the cutter housing 120, and the limiting unit 200 is connected to the cutter housing 120. The cutter 110 has a blade for cutting the consumable. The cutter housing 120 can be partially embedded in the limiting unit 200, making the connection of the cutter assembly 100 more stable and the overall structural strength of the cutter device better.

[0040] In an alternative embodiment, when the cutter assembly 100 and the limiting unit 120 are fixedly connected, the cutter assembly 100, or rather the cutter 110, is configured to move in the cutting direction, and the extending direction of the cutting edge end forms a preset angle with the cutting direction. Subsequently, when cutting the consumable, while the cutting edge inserts into the consumable, the consumable is sawed along the extending direction of the cutting edge, thereby increasing the cutting force and reducing the magnitude of the required external force. As Figure 3-4 shown, the preset angle a is greater than or equal to 15 degrees and less than or equal to 60 degrees, thereby achieving a better cutting effect. For example, it can be 15 degrees, 45 degrees, 60 degrees, etc. The cutting edge end can be a straight cutting edge, or, as Figure 3-4 shown, the cutting edge end is a serrated cutting edge, and the cutting edge end includes a plurality of teeth. The extending direction of the cutting edge end is the arrangement direction of the teeth. The width and spacing of the teeth can be set according to the softness and hardness of the consumable. In an alternative embodiment, as Figure 3 described, the width b of the teeth can be greater than or equal to 0.2 mm and less than or equal to 0.5 mm. For example, the width b of the teeth can be 0.4 mm. The spacing c of the teeth can be greater than or equal to 0.2 mm and less than or equal to 0.5 mm. For example, the spacing c of the teeth can be 0.4 mm. The narrowing amplitude of the cutter 110 towards the cutting edge end can be set according to the thickness of the cutter 110 and the processing requirements. In an alternative embodiment, as Figure 3-4 shown, the thickness e of the cutter is greater than or equal to 0.5 mm and less than or equal to 1 mm. For example, when the thickness e of the cutter is 0.5 mm, the width d of the area where the cutter 110 narrows towards the cutting edge end can be 1.5 mm; when the thickness e of the cutter is 1 mm, the width d of the area where the cutter 110 narrows towards the cutting edge end can be 3 mm. The width f of the cutter 110 in the direction perpendicular to the cutting direction can be greater than or equal to 4 mm and less than or equal to 5 mm. For example, it can be 4.65 mm.

[0041] In the alternative embodiment where the aforementioned limiting unit 200 further includes a second elastic member 230, as Figure 1-2 、 Figure 13-14 described, the second elastic member 230 can be a resilient plate. The resilient plate is connected to the base member 220, such as by bonding, welding, or the resilient plate is integrally formed with the base member 220. In an alternative embodiment, the base member 220 includes an inner cavity and a hollow 222 communicating with the inner cavity. A part of the cutter assembly 100 is embedded in the inner cavity, and the resilient plate is located at the hollow 222, thereby enabling the resilient plate to elastically move relative to the base member 220. The first end of the resilient plate is connected to the base member 220, and the limiting portion 210 is provided at a position away from the first end of the resilient plate. For example, it can be provided at the second end of the resilient plate away from the first end, thereby enabling the limiting portion 210 to have a larger movement range, or it can be provided between the first end and the second end of the resilient plate.

[0042] Alternatively, in another optional embodiment, the second elastic member 230 may be a spring. The spring may be a compression spring, one end of which is connected to the base member 220, the spring extends perpendicularly to the base member 220, and one end of the spring away from the base member 220 is connected to the limiting portion 210. The spring may also be a torsion spring.

[0043] When the limiting portion 210 is located at the fixed position and the yielding position, the relative position with respect to the base member 220 can be various, which is related to the working mode of the limiting portion 210 and the print head 400. For example, in an optional embodiment, when the limiting portion 210 is located at the fixed position, the limiting portion 210 protrudes from the surface of the base member 220, and when the limiting portion 210 is located at the yielding position, the limiting portion 210 is received inside the base member 220. The optional embodiments of the print head 400 in the print head device will be described in detail below.

[0044] On the other hand, Figure 5-12 , Figure 15 As shown, the utility model also provides a print head device, including any of the above-mentioned cutter devices and a print head 400, the cutter device is connected to the print head 400, and the print head 400 is used to thread the consumables. The position of the cutter assembly 100 includes a cutting position and an idle position, and the base member 220 of the cutter assembly 100 or the limiting unit 200 is used to move under the action of an external force, so that the cutter assembly 100 moves from the idle position to the cutting position to cut the consumables. The print head device includes any of the above-mentioned cutter devices, including the advantages of any of the above-mentioned cutter devices, which will not be repeated here.

[0045] When the cutter assembly 100 and the limiting unit 200 are fixedly connected, the cutting position and the idle position refer to the position of the cutter assembly 100, which can also be interpreted as the position of the cutter assembly 100 and the limiting unit 200 as a whole. The cutter assembly 100 is used to move under the action of an external force, which can be the cutter assembly 100 moving under the action of an external force, or the limiting unit 200 moving under the action of an external force. When the cutter assembly 100 and the limiting unit 200 are movably connected, the cutting position and the idle position refer to the position of the cutter assembly 100, and the cutter assembly 100 is used to move under the action of an external force.

[0046] The fixing unit 410 of the print head 400 can be of various structures, and is intended to cooperate with the limiting portion 210 to limit the position of the cutter assembly 100. For example, the fixing unit 410 and the limiting portion 210 are a pair of buckles that can cooperate with each other; or, the fixing unit 410 and the limiting portion 210 are a clamping head and a clamping slot that can cooperate with each other; or, one of the limiting portion 210 and the fixing unit 410 is a clamping mouth, and the other of the limiting portion 210 and the fixing unit 410 is a clamping head, which is used to be embedded in the clamping mouth, so as to limit the movement range of the cutter assembly 100 by acting on the edge of the clamping mouth.

[0047] like Figure 5 , 6 As shown in FIG. 15 , the limiting portion 210 is a clamp head, and the fixing unit 410 is a bayonet. When the cutter assembly 100 is installed in place, the clamp head will move to a fixed position under the action of the second elastic member 230, and then be embedded in the bayonet, and interact with the side wall of the bayonet to limit the movement range of the cutter assembly 100, such as completely fixing the cutter assembly 100, or limiting the movement of the cutter assembly 100 within a certain range. Alternatively, in some optional embodiments, the base member 220 may be moved as a whole or partially elastic to drive the clamp head to be embedded in the bayonet, and interact with the side wall of the bayonet to limit the movement range of the cutter assembly 100.

[0048] In an optional embodiment, the print head 400 includes a print head housing 420 , which is provided with an inner cavity 421 and a first sliding opening 422 passing through the inner cavity 421 and the outside of the print head housing 420 , and the cutter assembly 100 is inserted into the inner cavity 421 through the first sliding opening 422 .

[0049] In the embodiment where the cutter assembly 100 is movably connected to the limiting unit 200, the limiting unit 200 and the side wall of the inner cavity 421 may be in surface contact, thereby stabilizing the position of the cutter assembly 100 in the inner cavity. Alternatively, in the embodiment where the cutter assembly 100 is fixedly connected to the limiting unit 200, the limiting unit 200 does not contact part of the side wall of the inner cavity 421, thereby reducing the resistance to the movement of the cutter assembly 100, but the cutter assembly 100 may be in sliding contact with the first sliding opening 422, thereby providing support and guidance for the movement of the cutter assembly 100.

[0050] In the embodiment where the limiting unit 200 as a whole drives the limiting portion 210 to move between the yielding position and the fixed position, the base member 220 can move relative to the inner cavity 421 at least in the direction in which the limiting portion 210 moves between the yielding position and the fixed position, thereby realizing whether the limiting portion 210 and the fixed unit 410 are limited. The aforementioned first elastic member can be disposed in the inner cavity 421.

[0051] It can be understood that the inner cavity 421 is connected to the consumables channel of the print head 400, or the consumables channel passes through the inner cavity 421, so that the cutter assembly 100 located in the inner cavity can cut the consumables.

[0052] In an optional embodiment, when the limiting portion 210 moves relative to the base member 220, the outer wall of one side of the limiting portion 210 provided on the base member 220 abuts against the side of the side wall of the inner cavity 421 provided with the bayonet, and when the limiting portion 210 is located at the fixed position, the limiting portion 210 protrudes from the surface of the limiting unit 200 and then embeds into the bayonet; when the limiting portion 210 is located at the yielding position, the limiting portion 210 is stored inside the base member 220, and then the cutter assembly 100 can extend into or move out of the inner cavity 421. When the limiting portion 210 is fixedly arranged relative to the base member 220 and the base member 220 can be deformed, the outer wall of one side of the limiting portion 210 provided on the base member 220 abuts against the side of the side wall of the inner cavity 421 provided with the bayonet, and the limiting portion 210 is located at the yielding position through the local deformation of the base member 220. When the limiting portion 210 is fixed relative to the base member 220 and the shape of the base member 220 is fixed, the base member 220 can be moved by the action of the first elastic member until the outer wall of one side of the limiting portion 210 on the base member 220 abuts against the side of the side wall of the inner cavity 421 where the bayonet is provided, and the limiting portion 210 protrudes from the surface of the limiting unit 200 and then embeds into the bayonet; through the movement of the base member 220 under external force, the outer wall of one side of the limiting portion 210 on the base member 220 and the side of the side wall of the inner cavity 421 where the bayonet is provided move away from each other, and then when the limiting portion 210 moves to the yielding position, the cutter assembly 100 can be extended into or moved out of the inner cavity 421.

[0053] In an optional embodiment, the cutter assembly 100 is used to be installed to the print head 400 from a preset end, and a guide slope is provided on one side of the limiting portion 210 relative to the preset end. The guide slope is inclined in a direction away from the preset end toward a side of the base member 220 away from the limiting unit 200, and the guide slope is used to interact with the print head 400 to move the limiting portion 210 to a yielding position. For example, the limiting portion 210 can be inserted into the inner cavity 421 through the first sliding opening 422 from the preset end, and the guide slope will interact with the edge of the first sliding opening 422, and then the force that causes the limiting portion 210 to move toward the inside of the cutter assembly 100 is applied through the guide slope, and then the limiting portion 210 yields, so that the cutter assembly 100 enters the inner cavity 421 through the first sliding opening 422. When the limiting portion 210 moves to be opposite to the bayonet opening provided on the side wall of the inner cavity 421, the limiting portion 210 moves to a fixed position, and then is embedded in the bayonet opening, so as to achieve the limiting effect of the cutter assembly 100. Alternatively, the guiding bevel may interact with the edge of the first sliding opening 422, and then the guiding bevel applies a force to move the limiting portion 210 and the base member 220 away from the edge of the first sliding opening 422, and then the limiting portion 210 gives way, so that the cutter assembly 100 enters the inner cavity 421 through the first sliding opening 422. When the limiting portion 210 moves to be opposite to the bayonet opening provided on the side wall of the inner cavity 421, the limiting portion 210 and the base member 220 move toward the bayonet opening as a whole, and the limiting portion 210 moves to a fixed position, and then is embedded in the bayonet opening, so as to achieve the limiting effect of the cutter assembly 100.

[0054] In an optional implementation, if Figure 10 The print head device further includes a force-applying member 700, which is elastically connected to the print head 400, or the print head housing 420. The force-applying member 700 is arranged opposite to the limiting portion 210, and the force-applying member 700 is at least used to move under the action of an external force to push the limiting portion 210 to move to a yielding position.

[0055] The force-applying member 700 can be integrally formed with the print head housing 420, and the end of the force-applying member 700 includes a force-applying protrusion. For example, in the embodiment in which the aforementioned limiting portion 210 is a clamping head and the fixing unit 410 is a bayonet, the force-applying protrusion of the force-applying member 700 can be opposite to the clamping head through the bayonet. When the cutter assembly 100 needs to be disassembled, the force-applying member 700 is pressed, and the force-applying protrusion will pass through the bayonet and act on the clamping head, thereby moving the clamping head to a yielding position, and then the cutter assembly 100 can be moved to disengage from the print head 400, avoiding the problem of inconvenience in applying force to the limiting portion 210.

[0056] In the following embodiments, several more specific optional embodiments will be described for two embodiments in which the cutter assembly 100 is fixedly connected to the limiting unit 200, and the cutter assembly 100 is movably connected to the limiting unit 200:

[0057] First, the cutter assembly 100 is fixedly connected to the limit unit 200, and the limit unit 200 is movably connected to the print head 400. During installation, the cutter assembly 100 is inserted into the inner cavity 421 through the first sliding opening 422 as a whole. During the installation of the cutter assembly 100, the guiding inclined surface of the limit portion 210 interacts with the edge of the first sliding opening 422, thereby causing the limit portion 210 to move to the yielding position. Until the cutter assembly 100 moves to the idle position, such as Figure 9 As described above, the limiting portion 210 will lose the external force restriction, and then move to the fixed position and embed into the fixing unit 410. The end of the limiting unit 200 facing away from the cutter assembly 100 is located outside the print head 400 or is located in the same plane as the end surface of the print head 400 with the first sliding opening 422. During the printing process, the part of the limiting unit 200 located outside the print head 400 is used to move under the action of external force, so that the cutter assembly 100 as a whole moves from the idle position to the cutting position, such as Figure 10 As shown, the cutting of the consumables is then achieved. After the cutting is completed, the external force releases the limiting unit 200, and the cutter assembly 100 moves toward the idle position. The limiting portion 210 acts on the edge of the fixing unit 410, and then the cutter assembly 100 is restricted to the idle position. When the cutter assembly 100 needs to be disassembled, the force applying member 700 is pressed, and the limiting portion 210 is moved to the yield position, so that the cutter assembly 100 can be moved out of the inner cavity 421. That is, the limiting portion 210 cooperates with the print head 400 or the fixing unit 410 to restrict the cutter assembly 100 between the idle position and the cutting position, rather than always restricting it to the fixed position.

[0058] In an optional embodiment, the print head 400 further includes an insert 430, which is connected to the print head housing 420. The insert 430 may be located in the inner cavity 421. The insert 430 is provided with a second sliding opening 431, and the limiting unit 200 is slidably connected to the second sliding opening 431. The insert 430 is spaced apart from the first sliding opening 422, which can play a role in supporting the limiting unit 200 from both sides and guiding the movement of the limiting unit 200, thereby avoiding the problem of unstable position and shaking of the limiting unit 200.

[0059] In an optional embodiment, the print head 400 further includes a slide 440, which is connected to the print head housing 420, and the slide 440 may be located between the insert 430 and the first sliding opening 422. Figure 7 As described above, the base member 220 of the limiting unit 200 is provided with a third sliding opening 221, the inner slideway 440 is slidably connected to the third sliding opening 221, and the limiting unit 200 is slidably abutted against the inner slideway 440, thereby further ensuring the stability of the limiting unit 200.

[0060] In an optional embodiment, the print head device further includes: an elastic component 500, the elastic component 500 is respectively connected to the cutter component 100 and the print head 400, and the elastic component 500 is used to provide elastic force to the cutter component 100 to move the cutter component 100 to an idle position.

[0061] The elastic component 500 allows the cutter assembly 100 to return to the idle position after the external force driving the cutter assembly 100 to move to the cutting position is removed, so as to avoid blocking the consumable passage and prepare for the next cutting of the consumable. The elastic component 500 can be arranged in the aforementioned inner cavity 421, such as on the side of the insert 430 opposite to the first sliding opening 422.

[0062] Furthermore, the elastic component 500 includes an elastic body 510 and a push head 520, one end of the elastic body 510 is connected to the print head 400, and the other end of the elastic body 510 is connected to the push head 520, and the push head 520 abuts against the cutter assembly 100. The elastic body 510 can be a compression spring, and the push head 520 can be a bolt. The compression spring is sleeved on the stud of the bolt to achieve a limiting effect on the elastic body 510, and the nut of the bolt abuts against the end of the cutter assembly 100. More specifically, a recess is provided on the nut of the bolt, and the end of the cutter assembly 100 is embedded in the recess, thereby increasing the stability of the connection between the elastic component 500 and the cutter assembly 100.

[0063] Secondly, the cutter assembly 100 and the limiting unit 200 are movably connected. During installation, the cutter assembly 100 is inserted into the inner cavity 421 through the first sliding opening 422 as a whole. During the installation of the cutter assembly 100, the guiding inclined surface of the limiting portion 210 interacts with the edge of the first sliding opening 422, and then the limiting portion 210 moves to the yielding position until the cutter assembly 100 completely enters the inner cavity 421 and contacts the inner cavity 421 relative to the inside of the first sliding opening 422. Figure 15 As described above, the limiting portion 210 will lose the external force restriction, and then move to the fixed position and embed into the fixing unit 410. At this time, the position of the cutter assembly 100 will be fixed and will not move in the inner cavity 421. The force-applying end of the cutter assembly 100 is located outside the print head 400. During the printing process, the force-applying end of the cutter assembly 100 is used to move under the action of external force, so that the cutter assembly 100 moves from the idle position to the cutting position, such as Figure 13 After the cutting is completed, the external force releases the force-applying end of the cutter assembly 100, and the cutter assembly 100 returns to the idle position, as shown in FIG. Figure 14When the cutter assembly 100 needs to be disassembled, the force applying member 700 is pressed, that is, the limiting portion 210 is moved to the yielding position, so that the cutter assembly 100 can be moved out of the inner cavity 421. That is, the limiting portion 210 cooperates with the print head 400 or the fixing unit 410 to limit the relative position of the limiting unit 200 and the print head 400, that is, the cutter assembly 100 is limited to a fixed position.

[0064] In an optional embodiment, the cutter assembly 100 also includes a third elastic member, one end of the third elastic member is connected to the limiting unit 200, and the other end of the third elastic member is connected to the cutter assembly 100, and the third elastic member is used to apply an elastic force to the cutter assembly 100 to move the cutter assembly 100 to the idle position.

[0065] The third elastic member allows the cutter assembly 100 to return to the idle position after the external force driving the cutter assembly 100 to move to the cutting position is removed, avoiding blocking the consumables channel and preparing for the next consumables cutting. The third elastic member can be arranged in the limiting unit 200, and the third elastic member can be a torsion spring.

[0066] In an optional implementation, if Figure 11-12 As shown, the print head device also includes: a first position sensing component 610 and a second position sensing component 620. The first position sensing component 610 is arranged on the limit unit 200 or the cutter assembly 100, and the second position sensing component 620 is arranged on the print head 400. When the cutter assembly 100 moves to the cutting position, the second position sensing component 620 is triggered to send a detection signal.

[0067] like Figure 11 As described above, when the cutter assembly 100 is in the idle position, the first position sensing element 610 is away from the second position sensing element 620, and then the first position sensing element 610 releases the triggering of the second position sensing element 620. When it is necessary to cut the consumables, the cutter assembly 100 moves to the position as shown in FIG. Figure 12 At the cutting position, the first position sensor 610 approaches the second position sensor 620, and then the first position sensor 610 triggers the second position sensor 620 to send a detection signal to ensure that the cutter assembly 100 moves into place and provides feedback on whether the cutter assembly 100 effectively cuts the consumables.

[0068] The first position sensing member 610 and the second position sensing member 620 can be of various types. For example, in an optional embodiment, the second position sensing member 620 is a Hall sensor, and the first position sensing member 610 is a magnetic member. When the cutter assembly 100 moves to the cutting position, the magnetic member moves into the sensing range of the Hall sensor, and then triggers the Hall sensor to send a detection signal; when the cutter assembly 100 moves to the idle position, the magnetic member moves out of the sensing range of the Hall sensor, and then the Hall sensor stops sending a detection signal.

[0069] Alternatively, in another alternative embodiment, the second position sensor 620 is a touch switch, and the first position sensor 610 is a contact. When the cutter assembly 100 moves to the cutting position, the contact presses the elastic piece of the touch switch, and then triggers the touch switch to send out a detection signal; when the cutter assembly 100 moves to the idle position, the contact disengages from the elastic piece of the touch switch, and then the touch switch stops sending out the detection signal.

[0070] Alternatively, in yet another alternative embodiment, the second position sensor 620 is a photoelectric sensor, and the first position sensor 610 is an occlusion member. When the cutter assembly 100 moves to the cutting position, the occlusion member enters the detection slot of the photoelectric sensor and then blocks the pipeline of the photoelectric sensor, triggering the photoelectric sensor to send out a detection signal; when the cutter assembly 100 moves to the idle position, the occlusion member disengages from the photoelectric sensor, and then the photoelectric sensor stops sending out the detection signal.

[0071] On the other hand, the present utility model further provides a three-dimensional forming device, including a print head device as described in any one of the above, as well as a bracket and a printing platform. The bracket may further include a gantry, a base, and an X-axis guide frame. The gantry is connected to the base, the X-axis guide frame is drivingly connected to the gantry, the print head device is drivingly connected to the X-axis guide frame, and the printing platform is drivingly connected to the base. The three-dimensional forming device includes a print head device as described in any one of the above, including the advantages of the print head device described in any one of the above, which will not be elaborated here.

[0072] In an alternative embodiment, the three-dimensional forming device further includes: a force applying member, which is connected to the bracket, such as being connected to the X-axis guide frame, the gantry, or the base. The force applying member is used to apply an external force to the limiting unit 200 and / or the cutter assembly 100, so that the cutter assembly 100 moves from the idle position to the cutting position to cut the consumable material. For example, when it is necessary to cut the consumable material, the X-axis guide frame drives the print head device to drive the cutter assembly 100 or the limiting unit 200 to move towards the force applying member until the cutter assembly 100 or the limiting unit 200 contacts the force applying member. Continuing to drive the print head device to move, the whole cutter assembly 100 and the limiting unit 200 or only the cutter assembly 100 will move towards the cutting position under the action of the force applying member, and then the cutting of the consumable material is realized. Then, driving the print head device away from the force applying member, the cutter assembly 100 will return to the idle position.

[0073] The present utility model further provides the following embodiments:

[0074] Reference numeral 1, a cutter device for a three-dimensional forming device, wherein the three-dimensional forming device includes a print head 400, and the print head 400 includes a fixing unit 410. The cutter device includes:

[0075] A cutter assembly 100 and a limiting unit 200, the limiting unit 200 is connected to the cutter assembly 100, and the limiting unit 200 includes a limiting portion 210;

[0076] The position of the limiting portion 210 relative to the fixing unit 410 includes a fixed position and a yielding position. The limiting portion 210 is configured to move between the fixed position and the yielding position under the action of an external force. When the limiting portion 210 is in the fixed position, the limiting portion 210 is used to cooperate with the fixing unit 410 to limit the moving range of the cutter assembly 100. When the limiting portion 210 is in the yielding position, the limiting portion 210 at least yields for the cutter assembly 100 to move away from the print head.

[0077] Item 2. The cutter device according to Item 1, wherein

[0078] The limiting unit 200 further includes a base member 220. The limiting portion 210 is connected to the base member 220, and the relative position between the limiting portion 210 and the base member 220 is fixed. The base member 220 is configured to move relative to the fixing unit 410 so that the limiting portion 210 moves between the fixed position and the yielding position.

[0079] Item 3. The cutter device according to Item 2, wherein

[0080] The base member 220 has elasticity;

[0081] And / or, the limiting unit 200 further includes a first elastic member. The first elastic member is at least connected to the base member 220, and the first elastic member is configured to apply an external force to the base member 220 to drive the limiting portion 210 to move to the fixed position.

[0082] Item 4. The cutter device according to Item 1, wherein

[0083] The limiting unit 200 further includes a base member 220. The limiting portion 210 is connected to the base member 220, and the limiting portion 210 is configured to move relative to the base member 220 to move between the fixed position and the yielding position.

[0084] Item 5. The cutter device according to Item 4, wherein

[0085] The limiting portion 210 has elasticity;

[0086] And / or, the limiting unit 200 further includes a second elastic member 230. The second elastic member 230 is connected to the base member 220, and the limiting portion 210 is connected to the second elastic member 230. The second elastic member 230 applies an external force to the limiting portion 210 to cause the limiting portion 210 to move to the fixed position.

[0087] Item 6. The cutter device according to Item 5, wherein

[0088] The second elastic member 230 is a resilient plate, or the second elastic member 230 is a spring.

[0089] Reference numeral 7. A cutting device according to reference numeral 1, wherein:

[0090] When the limiting portion 210 is located at the fixed position, the limiting portion 210 protrudes from the surface of the base member 220 of the limiting unit 200 . When the limiting portion 210 is located at the yielding position, the limiting portion 210 is received inside the base member 220 .

[0091] Reference numeral 8. A cutting device according to reference numeral 1, wherein:

[0092] The cutter assembly 100 includes a cutter 110 and a cutter housing 120 . The cutter 110 is connected to the cutter housing 120 . The limiting unit 200 is connected to the cutter housing 120 . The cutter 110 is used for cutting consumables.

[0093] Reference numeral 9. A cutting device according to reference numeral 1, wherein:

[0094] The cutter assembly 100 and the limiting unit 200 are fixedly connected;

[0095] The cutter assembly 100 includes a blade end, the blade end is used to contact with the consumable material, the cutter assembly 100 is used to move in the cutting direction, and the extension direction of the blade end forms a preset angle with the cutting direction;

[0096] The preset angle is greater than or equal to 15 degrees and less than or equal to 60 degrees;

[0097] The blade end is straight;

[0098] Alternatively, the blade end is serrated.

[0099] Reference numeral 10. A cutting device according to reference numeral 1, wherein:

[0100] The cutter assembly 100 and the limiting unit 200 are movably connected;

[0101] The cutter assembly 100 includes a blade end, a force-applying end and a rotating portion. The blade end is used to contact the consumables. The cutter assembly 100 is rotatably connected to the limiting unit 200 via the rotating portion.

[0102] Reference numeral 11. A print head device according to reference numeral 1, wherein:

[0103] The cutter assembly 100 is used to be inserted into the print head 400 from a preset end. A guide slope is provided on a side of the limiting portion 210 relative to the preset end. The guide slope is inclined in a direction away from the preset end toward a side of the base 220 away from the limiting unit 200. The guide slope is used to interact with the print head 400 to move the limiting portion 210 to a yielding position.

[0104] Reference numeral 12. A print head device, which includes a cutter device according to any one of the above reference numerals 1-11 and a print head 400. The cutter device is connected to the print head 400, and the print head 400 is used for threading a consumable.

[0105] Reference numeral 13. The print head device according to reference numeral 12, wherein

[0106] One of the limiting portion 210 and the fixing unit 410 is a bayonet, and the other of the limiting portion 210 and the fixing unit 410 is a chuck. The chuck is used to be embedded in the bayonet to limit the moving range of the cutter assembly 100 by acting on the edge of the bayonet.

[0107] Reference numeral 14. The print head device according to reference numeral 12, wherein

[0108] The print head 400 includes a print head housing 420. An inner cavity 421 and a first sliding opening 422 that penetrates the inner cavity 421 and the outside of the print head housing 420 are formed on the print head housing 420. The cutter assembly 100 is inserted into the inner cavity 421 through the first sliding opening 422.

[0109] Reference numeral 15. The print head device according to reference numeral 12, wherein

[0110] The print head device further includes a biasing member 700. The biasing member 700 is elastically connected to the print head 400. The limiting unit 200 further includes a base member 220. The limiting portion 210 is connected to the base member 220. The biasing member 700 is disposed opposite to the base member 220 and / or the limiting portion 210. The biasing member 700 is at least used to move under the action of an external force to push the limiting portion 210 to a yielding position.

[0111] Reference numeral 16. The print head device according to reference numeral 12, wherein

[0112] The position of the cutter assembly 100 includes a cutting position and an idle position. The cutter assembly 100 or the limiting unit 200 is used to move under the action of an external force to move the cutter assembly 100 from the idle position to the cutting position to cut the consumable.

[0113] Reference numeral 17. The print head device according to reference numeral 16, wherein

[0114] The cutter assembly 100 is fixedly connected to the limiting unit 200. The limiting unit 200 is movably connected to the print head 400. The limiting unit 200 is used to move under the action of an external force to move the cutter assembly 100 from the idle position to the cutting position;

[0115] The limiting portion 210 cooperates with the print head 400 to limit the cutter assembly 100 between the idle position and the cutting position.

[0116] Reference numeral 18. The print head device according to reference numeral 17, wherein

[0117] The print head 400 further includes an insert block 430, and the insert block 430 is connected to the print head housing 420 of the print head 400;

[0118] A second sliding opening 431 is formed in the insert block 430, and the limiting unit 200 is slidably connected to the second sliding opening 431.

[0119] Reference numeral 19. The print head device according to reference numeral 17, wherein

[0120] The print head 400 further includes a slideway 440, and the slideway 440 is connected to the print head housing 420 of the print head 400;

[0121] A third sliding opening 221 is formed in the limiting unit 200, the inner slideway 440 is slidably connected to the third sliding opening 221, and the limiting unit 200 is in sliding abutment with the inner slideway 440.

[0122] Reference numeral 20. The print head device according to reference numeral 17, wherein the print head device further includes:

[0123] An elastic component 500, the elastic component 500 is respectively connected to the cutter assembly 100 and the print head 400, and the elastic component 500 is used to apply a force for moving the cutter assembly 100 to the idle position.

[0124] Reference numeral 21. The print head device according to reference numeral 20, wherein

[0125] The elastic component 500 includes an elastic main body 510 and a push head 520, one end of the elastic main body 510 is connected to the print head 400, the other end of the elastic main body 510 is connected to the push head 520, and the push head 520 abuts against the cutter assembly 100.

[0126] Reference numeral 22. The print head device according to reference numeral 16, wherein

[0127] The cutter assembly 100 is movably connected to the limiting unit 200, and the cutter assembly 100 is used to move under the action of an external force so as to move from the idle position to the cutting position.

[0128] Reference numeral 23. The print head device according to reference numeral 22, wherein

[0129] The cutter assembly 100 further includes a third elastic member, one end of the third elastic member is connected to the limiting unit 200, the other end of the third elastic member is connected to the cutter assembly 100, and the third elastic member is used to apply an elastic force for moving the cutter assembly 100 to the idle position to the cutter assembly 100.

[0130] Reference numeral 24. The print head device according to reference numeral 16, wherein the print head device further includes:

[0131] A first position sensor 610 and a second position sensor 620, one of the first position sensor 610 and the second position sensor 620 is disposed on the limiting unit 200 or the cutter assembly 100, and the other of the first position sensor 610 and the second position sensor 620 is disposed on the print head 400. When the cutter assembly 100 moves to the cutting position, the first position sensor 610 triggers the second position sensor 620 to emit a detection signal.

[0132] Reference numeral 25. A print head device according to reference numeral 24, wherein

[0133] The second position sensor 620 is a Hall sensor, and the first position sensor 610 is a magnetic member;

[0134] Or, the second position sensor 620 is a touch switch, and the first position sensor 610 is a contact;

[0135] Or, the second position sensor 620 is a photoelectric sensor, and the first position sensor 610 is an occlusion member.

[0136] Reference numeral 26. A three-dimensional forming device, which includes a print head device according to any one of the above reference numerals 12-25.

[0137] Reference numeral 27. A three-dimensional forming device according to reference numeral 26, which further includes:

[0138] A bracket and a force applying member. The force applying member is connected to the bracket, and the print head device is drivingly connected to the bracket. The force applying member is used to apply an external force to the limiting unit 200 and / or the cutter assembly 100, so that the cutter assembly 100 moves from the idle position to the cutting position to cut the consumable material.

[0139] As described above, only the specific optional embodiments of the present invention are provided, 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 be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A cutting device for a three-dimensional forming device, characterized in that: The three-dimensional molding device comprises a printing head (400), the printing head (400) comprises a fixing unit (410), and the cutting device comprises: A cutter assembly (100) and a limiting unit (200), wherein the limiting unit (200) is connected to the cutter assembly (100), and the limiting unit (200) comprises a limiting portion (210); The position of the limiting portion (210) relative to the fixing unit (410) comprises a fixed position and a yielding position. The limiting portion (210) is used to move between the fixed position and the yielding position under the action of an external force. When the limiting portion (210) is located at the fixed position, the limiting portion (210) is used to cooperate with the fixing unit (410) to limit the moving range of the cutter assembly (100). When the limiting portion (210) is in the yielding position, the limiting portion (210) at least yields for the cutter assembly (100) to move away from the print head.

2. The cutter device according to claim 1, characterized in that: The limiting unit (200) further comprises a base member (220), the limiting portion (210) being connected to the base member (220), the limiting portion (210) and the base member (220) being fixed in relative position to each other, and the base member (220) being used to move relative to the fixing unit (410) so that the limiting portion (210) moves between the fixed position and the yielding position.

3. The cutter device according to claim 2, characterized in that: The base member (220) is elastic; And / or, the limiting unit (200) further comprises a first elastic member, the first elastic member being connected to at least the base member (220), the first elastic member being used to apply an external force to the base member (220) to drive the limiting portion (210) to move to the fixed position.

4. The cutter device according to claim 1, characterized in that: The limiting unit (200) further comprises a base member (220), the limiting portion (210) being connected to the base member (220), and the limiting portion (210) being used to move relative to the base member (220) so as to move between the fixed position and the yielding position.

5. The cutter device according to claim 4, characterized in that: The limiting portion (210) is elastic; And / or, the limiting unit (200) further comprises a second elastic member (230), the second elastic member (230) being connected to the base member (220), the limiting portion (210) being connected to the second elastic member (230), and the second elastic member (230) applying an external force to the limiting portion (210) so as to move the limiting portion (210) to the fixed position.

6. The cutter device according to claim 5, characterized in that: The second elastic member (230) is a spring plate, or the second elastic member (230) is a spring.

7. The cutter device according to claim 1, characterized in that: When the limiting portion (210) is located at the fixed position, the limiting portion (210) protrudes from the surface of the base member (220) of the limiting unit (200); when the limiting portion (210) is located at the yielding position, the limiting portion (210) is received inside the base member (220).

8. The cutter device according to claim 1, characterized in that: The cutter assembly (100) comprises a cutter (110) and a cutter shell (120); the cutter (110) is connected to the cutter shell (120); the limiting unit (200) is connected to the cutter shell (120); and the cutter (110) is used for cutting consumables.

9. The cutter device according to claim 1, characterized in that: The cutter assembly (100) and the limiting unit (200) are fixedly connected; The cutter assembly (100) comprises a blade end, the blade end is used to contact with consumables, the cutter assembly (100) is used to move in a cutting direction, and the extension direction of the blade end forms a preset angle with the cutting direction; The preset angle is greater than or equal to 15 degrees and less than or equal to 60 degrees; The blade end is in a straight line shape; Alternatively, the blade end is serrated.

10. The cutter device according to claim 1, characterized in that: The cutter assembly (100) and the limiting unit (200) are movably connected; The cutter assembly (100) comprises a blade end, a force-applying end and a rotating part, the blade end being used for contacting consumables, and the cutter assembly (100) being rotatably connected to the limiting unit (200) via the rotating part.

11. The cutter device according to claim 1, characterized in that: The cutter assembly (100) is used to be inserted into the print head (400) from a preset end, and a guide slope is provided on a side of the limiting portion (210) relative to the preset end, and the guide slope is inclined in a direction away from the preset end and toward a side of a base member (220) away from the limiting unit (200), and the guide slope is used to act with the print head (400) so that the limiting portion (210) moves to the yielding position.

12. A print head device, characterized in that: It comprises a cutter device and a print head (400) as described in any one of claims 1 to 11, wherein the cutter device is connected to the print head (400), and the print head (400) is used for threading consumables.

13. The print head device according to claim 12, characterized in that: One of the limiting portion (210) and the fixing unit (410) is a bayonet, and the other of the limiting portion (210) and the fixing unit (410) is a clamping head, and the clamping head is used to be embedded in the bayonet so as to limit the movement range of the cutter assembly (100) by acting on the edge of the bayonet.

14. The print head device according to claim 12, characterized in that: The print head (400) comprises a print head housing (420), the print head housing (420) being provided with an inner cavity (421), and a first sliding opening (422) penetrating the inner cavity (421) and the outside of the print head housing (420), and the cutter assembly (100) is inserted into the inner cavity (421) through the first sliding opening (422).

15. The print head device according to claim 12, characterized in that: The print head device further comprises a force applying member (700), the force applying member (700) being elastically connected to the print head (400), the limiting unit (200) further comprising a base member (220), the limiting portion (210) being connected to the base member (220), the force applying member (700) being arranged relative to the base member (220) and / or the limiting portion (210), and the force applying member (700) being at least used for moving under the action of an external force to push the limiting portion (210) to move to the yielding position.

16. The print head device according to claim 12, characterized in that: The position of the cutter assembly (100) comprises a cutting position and an idle position, and the cutter assembly (100) or the limiting unit (200) is used to move under the action of an external force, so that the cutter assembly (100) moves from the idle position to the cutting position to cut consumables.

17. The print head device according to claim 16, characterized in that: The cutter assembly (100) is fixedly connected to the limiting unit (200), the limiting unit (200) is movably connected to the print head (400), and the limiting unit (200) is used to move under the action of an external force so that the cutter assembly (100) moves from the idle position to the cutting position; The limiting portion (210) cooperates with the print head (400) to limit the cutter assembly (100) between the idle position and the cutting position.

18. The print head device according to claim 17, characterized in that: The print head (400) further comprises an insert (430), wherein the insert (430) is connected to a print head housing (420) of the print head (400); The insert (430) is provided with a second sliding opening (431), and the limiting unit (200) is slidably connected to the second sliding opening (431).

19. The print head device according to claim 17, characterized in that: The print head (400) further comprises a slideway (440), wherein the slideway (440) is connected to a print head housing (420) of the print head (400); The limiting unit (200) is provided with a third sliding opening (221), the slideway (440) is slidably connected to the third sliding opening (221), and the limiting unit (200) is slidably abutted against the slideway (440).

20. The print head device according to claim 17, wherein: The print head device also includes: An elastic component (500), the elastic component (500) being connected to the cutter component (100) and the print head (400) respectively, and the elastic component (500) being used to apply a force causing the cutter component (100) to move toward the idle position.

21. The print head device according to claim 20, characterized in that: The elastic component (500) comprises an elastic body (510) and a pusher head (520), one end of the elastic body (510) is connected to the print head (400), the other end of the elastic body (510) is connected to the pusher head (520), and the pusher head (520) abuts against the cutter component (100).

22. The print head device according to claim 16, characterized in that: The cutter assembly (100) is movably connected to the limiting unit (200), and the cutter assembly (100) is used to move under the action of an external force so as to move from the idle position to the cutting position.

23. The print head device according to claim 22, characterized in that: The cutter assembly (100) further comprises a third elastic member, one end of the third elastic member is connected to the limiting unit (200), and the other end of the third elastic member is connected to the cutter assembly (100), and the third elastic member is used to apply an elastic force to the cutter assembly (100) so as to move the cutter assembly (100) towards the idle position.

24. The print head device according to claim 16, characterized in that: The print head device also includes: A first position sensing component (610) and a second position sensing component (620), wherein one of the first position sensing component (610) and the second position sensing component (620) is arranged on the limiting unit (200) or the cutter assembly (100), and the other of the first position sensing component (610) and the second position sensing component (620) is arranged on the print head (400), and when the cutter assembly (100) moves to the cutting position, the first position sensing component (610) triggers the second position sensing component (620) to send a detection signal.

25. The print head device according to claim 24, characterized in that: The second position sensing element (620) is a Hall sensor, and the first position sensing element (610) is a magnetic element; Alternatively, the second position sensing element (620) is a touch switch, and the first position sensing element (610) is a contact; Alternatively, the second position sensing element (620) is a photoelectric sensor, and the first position sensing element (610) is a shielding element.

26. A three-dimensional forming device, characterized in that: A print head device comprising any one of claims 12-25.

27. The three-dimensional forming device according to claim 26, characterized in that: Also includes: A bracket and a force-applying member, wherein the force-applying member is connected to the bracket, the print head device is drivingly connected to the bracket, and the force-applying member is used to apply an external force to the limit unit (200) and / or the cutter assembly (100) so that the cutter assembly (100) moves from an idle position to a cutting position to cut consumables.

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