Printhead assembly, printhead mechanism and 3D printer

Abstract

Printhead assembly, characterized in that it comprises the following: a printhead section; a heat coupling section comprising a first part and a second part, wherein the first part is connected to the printhead and the second part is designed to have a guide structure and a mounting structure, wherein the guide structure comprises an inclined guide surface and the mounting structure comprises a recessed fitting groove.

Description

Technical area

[0001] The present application relates to the field of 3D printing and in particular to a printhead assembly, a printhead mechanism and a 3D printing device. Background technology

[0002] 3D printing technology is a rapid prototyping technology based on digital model files. It uses adhesive materials such as special waxes, metal powders, or plastics to create three-dimensional objects by printing layers of material. Melt-deposition (MDE) rapid prototyping technology is one of the most important 3D printing technologies. In this technology, the filament is heated and melted, then extruded from the print head, deposited onto the build platform or the previous layer of solidified material, and finally creates the actual object. During the 3D printing process, the melting process of the consumables in the print head is crucial for extrusion and printing, and this melting process depends on many factors, including temperature and flow rate.How to provide a more powerful printhead structure is something that the expert in this field needs to consider. Content of the utility model

[0003] To solve the problems of the prior art, embodiments of the present application provide a printhead assembly, a printhead mechanism and a 3D printer.

[0004] Exemplary embodiments of the present application provide a printhead assembly comprising the following: a printhead section; a heat coupling section comprising a first part and a second part, wherein the first part is connected to the printhead and the second part is designed to have a guide structure and a mounting structure, wherein the guide structure comprises an inclined guide surface and the mounting structure comprises a recessed fitting groove.

[0005] It is understood that the first part of the thermal coupling section is connected to the printhead and is designed to enable the printhead assembly to extrude the consumable from the printhead; the second part of the thermal coupling section comprises a guide structure with an inclined guide surface designed to enable convenient connection of the second part with the external structure; and the second part of the thermal coupling section comprises a mounting structure with a recessed locating groove designed to enable locking of the second part with the external structure.

[0006] In one embodiment, the printhead assembly is provided with a transmission channel for transferring consumables, wherein the transmission channel extends along a transmission direction and passes through the printhead and the heat coupling section, and wherein the guide structure and the mounting structure are arranged at an end of the heat coupling section facing away from the printhead along the transmission direction.

[0007] In one embodiment, a first step structure is provided at a boundary between the first part and the second part, and the first part is raised relative to the second part in at least one direction that intersects the transmission direction in order to form the first step structure.

[0008] In one embodiment, the guide structure and the assembly structure are arranged along the transmission direction on a side of the second part facing away from the first stage structure.

[0009] In one embodiment, a transmission channel is opened through the printhead assembly along the transmission direction, and the guide structure and the mounting structure are arranged on an outside of the second part relative to the transmission channel.

[0010] In one embodiment, the inclined direction of the guide surface intersects the transmission direction, the guide surface corresponds to an outer surface of the guide structure, and the outer diameter of the guide structure increases along the transmission direction from the side facing away from the print head to the side facing the print head.

[0011] In one embodiment, the fitting groove is formed by the outer surface of the heat coupling section being recessed towards the inner part in which the transmission channel is located, and the outer diameter of the area of ​​the heat coupling section corresponding to the fitting groove is smaller than the outer diameter of other areas of the heat coupling section.

[0012] In one embodiment, the guide structure is located along the transmission direction on a side of the mounting structure facing away from the printhead, and the guide structure and the mounting structure are arranged around the transmission channel.

[0013] In one embodiment, the second part further comprises a second step structure, wherein the second step structure is located on a side of the assembly structure facing the first part, and the outer diameter of the second step structure on the side facing the first part is larger than the outer diameter of the second step structure on the side facing away from the first part.

[0014] In one embodiment, the printhead assembly further comprises a neck section connected to an end of the second part, which is provided with the guide structure and the mounting structure.

[0015] In one embodiment, a transmission channel is opened on the printhead assembly, extending through it along a transmission direction, the transmission channel passing through the printhead, the heat coupling section and the neck section, and the guide structure and the mounting structure are located on an outside of the transmission channel relative to the part of the neck section connected to the heat coupling section.

[0016] In one embodiment, the neck section comprises a transmission tube and a heat dissipation reinforcement tube, wherein one end of the transmission tube is connected to the second part and the heat dissipation reinforcement tube is attached to the outside of the transmission tube and spaced apart from the heat coupling section. In another embodiment, the printhead assembly further comprises a heat dissipation section, wherein the heat dissipation section is spaced apart from the heat coupling section, the heat dissipation section is attached to and connected to the outside of the neck section, and the heat dissipation reinforcement section is thermally coupled to the heat dissipation section.

[0017] In one embodiment, the printhead assembly further comprises a connecting section, wherein the connecting section fits together with the guide structure and is plugged onto the heat coupling section, and a mounting opening is open on the connecting section, wherein the mounting opening corresponds to the mounting structure and exposes at least part of the locating groove, and a mounting element extends through the mounting opening into the locating groove to connect the heat coupling section to the connecting section.

[0018] An embodiment of the present application further provides a printhead mechanism comprising a printhead body and a printhead assembly according to one of the above-mentioned embodiments, wherein the printhead assembly is arranged in the printhead body.

[0019] An embodiment of the present application further provides a 3D printing device comprising a 3D print body and a printhead mechanism or printhead assembly as described above, according to one of the embodiments mentioned above. Figures Fig. Figure 1 is a schematic structural representation of a 3D printing device according to an embodiment of the present application. Fig. Figure 2 is a schematic structural representation of a printhead mechanism according to an embodiment of the present application. Fig. Figure 3 is a schematic perspective view of a 3D printing device according to an embodiment of the present application. Fig. Figure 4 is a schematic perspective partial view of a 3D printing device according to an embodiment of the present application. Fig. 5 is a schematic cross-sectional view along the direction VV in Fig. 4. Fig. Figure 6 is an enlarged schematic representation of a part belonging to area VI in Fig. 5 corresponds to. Fig. Figure 7 is a schematic perspective partial view of a 3D printing device according to an embodiment of the present application. Fig. Figure 8 is a schematic representation of a partial disassembly of a 3D printing device according to an embodiment of the present application. Reference symbols of the main components: 10 Printhead assembly 11 Printhead section 12 Heat coupling section 121 Part One 122 Part Two 123 Management structure 1231 Guide surface 124 Assembly structure 1241 Fitnut 125 First stage structure 126 Second-stage structure 13 Neck section 131 Transmission pipe 1311 First final section 1312 Second final section 132 Heat dissipation reinforcement pipe 14 Heating section 141 Heating ring 142 Heating element 15 Heat dissipation section 16 Connecting section 161 First Segment 1611 Mounting opening 1612 Intake opening 1613 Third-stage structure 1614 Fourth-stage structure 162 Second Segment 163 Third Segment 164 Connecting element 165 Sensor 17 transmission channel Z transmission direction 1 Printhead mechanism 18 printhead bodies 181 support frames 182 Extrusion assembly 183 Material cutting assembly 2 3D printers 20 3D print head bodies 21 bracket 22 Mold platform

[0020] The following specific embodiments will further illustrate the present application in conjunction with the figures mentioned above. Specific embodiments

[0021] The description below refers to the figures to describe the content of the present application in more detail. The figures show exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be interpreted as being limited to the exemplary embodiments shown herein. These exemplary embodiments are provided to make the present application thorough and complete and to fully convey to the person skilled in the art the scope of the present application. Identical reference numerals denote identical or similar assemblies. The terminology used here serves solely to describe certain exemplary embodiments and is not intended to limit the present application.The singular forms “ein”, “eine”, and “der”, “die”, “das” used herein also include the plural forms, unless the context clearly indicates otherwise. Furthermore, when the terms “umfassen” and / or “beinhalten” and / or “aufgeben” are used herein, this signifies the presence of an integer, a step, an operation, a component, and / or an assembly, but does not exclude the presence or addition of one or more other features, areas, integers, steps, operations, components, and / or assemblies. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as they would normally be understood by a person skilled in the art in the field to which the present application belongs.Unless expressly defined herein, terms should also be interpreted as defined in general dictionaries in such a way that their meaning corresponds to their meaning in the relevant field and the content of the present application, and not as idealized or overly formal meanings.

[0022] In general, 3D printing technology is a rapid prototyping technology based on digital model files. It uses adhesive materials such as special waxes, metal powders, or plastics to create three-dimensional objects by printing layers of material. Melt-deposition (MDE) rapid prototyping technology is one of the most important 3D printing technologies. In this technology, the filament is heated and melted, then extruded from the print head, deposited onto the build platform or the previous layer of solidified material, and finally creates the actual object. During the 3D printing process, the melting process of the consumables in the print head is crucial for extrusion and printing, and this melting process depends on many factors, including temperature and flow rate.How to provide a more powerful printhead structure is something that the expert in this field needs to consider.

[0023] Accordingly, the embodiments of the present application provide a printhead assembly, a printhead mechanism, and a 3D printer that utilizes it. The printhead assembly comprises a printhead section and a thermal coupling section, and the thermal coupling section comprises a first part and a second part, wherein the first part is connected to the printhead and the second part is designed to have a guide structure and a mounting structure, the guide structure comprising an inclined guide surface and the mounting structure comprising a recessed locating groove. The printhead mechanism comprises a printhead body and the printhead assembly, and the printhead assembly is arranged on the printhead body. The 3D printer comprises a 3D print body and a printhead mechanism or printhead assembly as described above.

[0024] Furthermore, the first part of the thermal coupling section is connected to the printhead and designed to allow the printhead assembly to extrude the consumable from the printhead. The second part of the thermal coupling section comprises a guide structure with an inclined guide surface designed to facilitate easy connection of the second part to the external structure. The second part of the thermal coupling section includes a mounting structure with a recessed locating groove designed to allow locking of the second part to the external structure. Exemplary embodiments are described below with reference to the figures. It should be noted that the assemblies shown in the reference drawings are not necessarily drawn to scale; rather, identical or similar assemblies are designated by the same or similar reference numerals or technical terms.

[0025] The specific embodiments of the present application are described in more detail below with reference to the figures.

[0026] As in Fig. As shown in Figure 1, the embodiment of the present application provides a 3D printer 2 comprising a 3D print body 20 and a print head mechanism 1 or a print head assembly 10.

[0027] In one embodiment, the printhead assembly 10 can be contained in the printhead mechanism 1.

[0028] In this embodiment, the 3D printed body 20 comprises a holder 21 and a build platform 22. The print head mechanism 1 and the build platform 22 are each connected to the holder 21. The print head mechanism 1 and the build platform 22 can move relative to each other to enable 3D printing.

[0029] With further reference to Fig. 2 further provides an embodiment of the present application comprising a printhead mechanism 1 comprising a printhead body 18 and a printhead assembly 10, wherein the printhead assembly 10 is arranged in the printhead body 18.

[0030] In one embodiment, the printhead body 18 comprises a support frame 181, an extrusion assembly 182 and a material cutting assembly 183, wherein the printhead assembly 10, the extrusion assembly 182 and the material cutting assembly 183 are all mounted on the support frame 181 and the printhead mechanism 1 is connected to the 3D printed body 20 via the support frame 181.

[0031] In this embodiment, a sliding rail (not shown) can be provided on the support frame 181 and designed to allow a slidable arrangement of the printhead mechanism 1 on the bracket 21. The printhead assembly 10 is arranged at the end of the support 181 along the material transfer direction Z and is designed to melt and extrude the material; the extrusion assembly 182 is positioned upstream of the printhead assembly 10 in the material transfer direction Z and is designed to drive the feed of the material into the printhead assembly 10; the blade (not shown) of the material cutting assembly 183 is able to enter or exit the material transfer channel between the extrusion assembly 182 and the printhead assembly 10 and is designed to cut the materials.

[0032] With further reference to the Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig.Figure 8 describes an embodiment of the present application, comprising a printhead assembly 10 that includes a printhead section 11, a heat coupling section 12, a neck section 13, a heating section 14, a heat dissipation section 15, and a connecting section 16. The printhead 11 is detachably connected to the heat coupling section 12 or is integrally formed with it, and the neck section 13 is connected to the heat coupling section 12; the heat dissipation section 15 is spaced apart from the heat coupling section 12 and connected to it via the connecting section 16; the heating section 14 can be designed to be arranged separately from the neck section 13 and detachably connected to it, or the heating section 14 can also be integrated into the heat coupling section 12 and formed integrally with it.

[0033] In one embodiment, the transmission channel 17 extends along the transmission direction Z and even passes through the printhead assembly 10. The printhead assembly 10 contains several interconnected cavities designed to work together to form the transmission channel 17. In this embodiment, the transmission channel 17 passes through the printhead 11, the heat coupling section 12, and the neck section 13. The heating section 14 and the connecting section 16 are located on an outer side of the heat coupling section 12 relative to the transmission channel 17, and the heat dissipation section 15 is located on an outer side of the neck section 13 relative to the transmission channel 17.

[0034] In one embodiment, the printhead 11 is arranged at the downstream end of the heat coupling section 12 along the transmission direction Z; the heating section 14 is mounted on the heat coupling section 12 and positioned upstream of the printhead 11 in the transmission direction Z; the connecting section 16 is mounted on the heat coupling section 12 and positioned upstream of the heat coupling section 12 in the transmission direction Z; the neck section 13 is connected to the other end of the heat coupling section 12 and positioned upstream of the printhead 11 in the transmission direction Z; the heat dissipation section 15 is mounted on the neck section 13 and positioned upstream of the connecting section 16 in the transmission direction Z. In one embodiment, the heat coupling section 12 comprises a first part 121 and a second part 122.The first part 121 is connected to the printhead 11 and the second part 122 is designed to have a guide structure 123 and a mounting structure 124, wherein the guide structure 123 comprises an inclined guide surface 1231 and the mounting structure 124 comprises a recessed locating groove 1241.

[0035] It is understood that the first part 121 of the thermal coupling section 12 is connected to the printhead 11 and is designed to enable the printhead assembly 10 to extrude the consumable from the printhead 11, the second part 122 of the thermal coupling section 12 comprises a guide structure 123 with an inclined guide surface 1231 designed to enable convenient connection of the second part 122 with the external structure, and the second part 122 of the thermal coupling section 12 comprises a mounting structure 124 with a recessed locating groove 1241 designed to enable locking of the second part 122 with the external structure.

[0036] In this embodiment, the first part 121 and the second part 122 are formed in one piece. In other embodiments, the first part 121 and the second part 122 may not be integrated, for example, they may be detachably connected.

[0037] In one embodiment, the transmission channel 17 extends along the transmission direction Z and runs through the printhead 11 and the heat coupling section 12, and the guide structure 123 and the mounting structure 124 are arranged along the transmission direction Z at an end of the heat coupling section 12 facing away from the printhead 11.

[0038] It is understood that the first part 121 and the second part 122 are arranged along the transmission direction Z, that the end of the first part 121 facing away from the second part 122 along the transmission direction Z is connected to the print head 11, and that the end of the second part 122 facing away from the first part 121 is provided with a guide structure 123 and a mounting structure 124. That is, the thermal coupling section 12 is downstream along the transmission direction Z and is designed to connect one end of the extruded consumable to the print head 11, and the thermal coupling section 12 is upstream along the transmission direction Z and is designed such that the end connected to the connecting section 16 is provided with a guide structure 123 and a mounting structure 124.

[0039] In one embodiment, a first step structure 125 is provided at a boundary between the first part 121 and the second part 122, and the first part 121 is raised relative to the second part 122 in at least one direction that intersects the transmission direction Z in order to form the first step structure 125.

[0040] It is understood that the heat coupling section 12 is capable of supporting the heating section 14 and thermally coupling it to transfer heat to the transmission channel 17, thereby heating and melting the consumable. The first stage structure 125 is capable of supporting the heating section 14, while the second part 122 is capable of being in direct contact with the heating section 14 and thermally coupled to it. The second part 122 can be constructed as a single-layer structure made of a single material, and this type of structure can reduce heat loss during heat transfer and improve thermal efficiency.

[0041] In one embodiment, the first part 121 has an approximately rotary table shape; according to the boundary between the first part 121 and the second part 122, the outer diameter of the first part 121 is larger than the outer diameter of the second part 122 in order to form a first step structure 125.

[0042] In one embodiment, the guide structure 123 and the mounting structure 124 are arranged on the side of the second section 122 that faces away from the first stage structure 125 along the transmission direction Z.

[0043] In this embodiment, the heating section 14 comprises a heating ring 141, and the heating ring 141 is a ceramic heating coil having a hollow, annular structure and capable of generating heat when electrically supplied. The heating ring 141 is mounted on the outside of the second part 122; one end of the heating ring 141 is supported by the first stage structure 125, which is designed to support the heating ring 141; the other end of the heating ring 141 is located along the transmission direction Z on the side of the guide structure 123 and the mounting structure 124 facing the printhead 11, so that the guide structure 123 and the mounting structure 124 are exposed.

[0044] It is understood that the heating section 14 may further comprise a heat-conducting element 142 and the heat-conducting element 142 is electrically connected to the heating ring 141 and designed to supply the heating ring 141 with electrical energy.

[0045] In one embodiment, the connecting section 16 comprises a first segment 161, a second segment 162, and a third segment 163, with the second segment 162 and the third segment 163 each connected to the first segment 161. A receiving opening 1612 is open on the first segment 161, extending along the transmission direction Z and designed to receive the second segment 162; the second segment 162 is designed to receive the connecting element 164; the third segment 163 is designed to receive the sensor 165.

[0046] In this embodiment, the second segment 162 extends from the connection point between it and the first segment 161 towards the side facing away from the transmission channel 17, and one end of the connecting element 164 is arranged in the installation cavity and connected to the second segment 162 by means of a snap connection, a threaded connection, a stop and a limit, etc.; and the other end of the connecting element 164 is connected to the heat dissipation section 15 by means of a snap connection, a threaded connection, a stop and a limit, etc.

[0047] In this embodiment, the third segment 163 extends from the junction between it and the first segment 161 towards the side facing away from the transmission channel 17, and the sensor 165 can be a temperature sensor or an infrared sensor and is designed to detect the temperature of the printhead assembly 10. Furthermore, by virtue of its arrangement in the receiving groove provided in the third segment 163, the sensor 165 faces the heating section 14 and the printhead assembly 10 and is designed to detect the temperature of the heating section 14 and / or the heat coupling section 12 in order to monitor the temperature of the melting consumable.

[0048] In this embodiment, the first segment 161 and the third segment 163 are arranged symmetrically on opposite sides of the first segment 161, and the lengths of the third segment 163 and the first segment 161 along the transmission direction Z can be essentially equal. The length of the second segment 162 along the transmission direction Z can be shorter than that of the third segment 163 and the first segment 161, which can help to reduce the volume and weight of the connecting section 16 and achieve a weight reduction.

[0049] In this embodiment, the connecting section 16 can be an integral structure, and in other embodiments, the connecting section 16 can also be a split structure.

[0050] In one embodiment, the guide structure 123 and the mounting structure 124 are arranged on an outer surface of the second part 122 relative to the transmission channel 17. It is understood that during the installation process of the connecting section 16 and the thermal coupling section 12, the guide structure 123 and the mounting structure 124 on the outer surface can contribute to achieving the interaction between the thermal coupling section 12 and the connecting section 16.

[0051] In one embodiment, the connecting section 16 fits together with the guide structure 123 and is plugged onto the heat coupling section 12.

[0052] In this embodiment, the guide structure 123 is arranged around the transmission channel 17, the guide surface 1231 is inclined in a direction that intersects the transmission direction Z, and the guide surface 1231 corresponds to the outer surface of the guide structure 123. The outer diameter of the guide structure 123 increases along the transmission direction Z from the side facing away from the printhead 11 to the side facing the printhead 11, or the outer diameter of the guide structure 123 can be configured to increase gradually.

[0053] It is understood that during the installation process of the thermal coupling section 12 and the connecting section 16, the connecting section 16 is typically oriented towards the side of the second part 122 facing away from the first part 121 of the thermal coupling section 12 and is installed together with it; however, due to the structure of the connecting section 16, the second part 122 can be obscured by the connecting section 16 during the installation process, which complicates alignment and installation. The thermal coupling section 12 of the present application comprises a guide structure 123 with an inclined guide surface 1231, and the guide surface 1231 guides the installation process and can improve installation accuracy and efficiency.In one embodiment, the fitting groove 1241 is formed by the outer surface of the heat coupling section 12 being recessed towards a side on which the transmission channel 17 is located, and the outer diameter of the place of the heat coupling section 12 corresponding to the fitting groove 1241 is smaller than the outer diameter of other areas of the heat coupling section 12.

[0054] In one embodiment, a mounting opening 1611 is open on the connecting section 16, wherein the mounting opening 1611 corresponds to the mounting structure 124 and exposes at least a portion of the locating groove 1241. A mounting element (not shown) extends through the mounting opening 1611 into the locating groove 1241 to connect the heat coupling section 12 to the connecting section 16.

[0055] In one embodiment, the guide structure 123 is arranged along the transmission direction Z on a side of the mounting structure 124 facing away from the printhead 11, and the mounting structure 124 is arranged around the transmission channel 17.

[0056] It is understood that when the connecting section 16 is guided through the guide surface 1231 to move into the position where it aligns with the heat coupling section 12, the mounting opening 1611 is able to correspond to the locating groove 1241, and the mounting element is able to be inserted through the mounting opening 1611 into the locating groove 1241, so that by tightening the mounting element the heat coupling section 12 and the connecting section 16 can be connected to each other. The mounting structure 124 is arranged around the transmission channel 17 so that the mounting opening 1611 can align with the locating groove 1241 without rotating the connecting section 16, thus facilitating the assembly of the heat coupling section 12 and the connecting section 16.In other embodiments, the mounting structure 124 may not be arranged around the transmission channel 17 and the mounting opening 1611 may correspond to the matching groove 1241 by rotating the connecting section 16.

[0057] In one embodiment, the second part 122 further comprises a second step structure 126, and the second step structure 126 is located on a side of the assembly structure 124 facing the first part 121. The outer diameter of the second step structure 126 on the side facing the first part 121 is larger than the outer diameter of the second step structure 126 on the side facing away from the first part 121.

[0058] In this embodiment, a third stage structure 1613 and a fourth stage structure 1614 are formed on the connecting section 16, wherein the third stage structure 1613 is designed to abut the second stage structure 126 and the fourth stage structure 1614 is designed to abut the end of the heating ring 141, which is turned away from the first stage structure 125 along the transmission direction Z.

[0059] It is understood that the two opposite ends of the heating ring 141 are supported along the transmission direction Z by the connecting section 16 and the heat coupling section 12, respectively, thereby fixing the heating ring 141 in place. The fourth stage structure 1614 and the third stage structure 1613 are spaced apart from each other along the transmission direction Z, and the connecting section 16 and the heat coupling section 12 are supported by the second stage structure 126 and the third stage structure 1613, which not only facilitates installation and positioning between the heat coupling section 12 and the connecting section 16, but also prevents the connecting section 16 from excessively compressing the heating ring 141 and potentially damaging it.

[0060] In one embodiment, the second part 122 is provided with a guide structure 123 and an end of a mounting structure 124, which is connected to the neck section 13. The transmission channel 17 runs through the printhead 11, the heat coupling section 12, and the neck section 13. The guide structure 123 and the mounting structure 124 are located on the outside of the transmission channel 17 relative to the part of the neck section 13 where it is connected to the heat coupling section 12.

[0061] In one embodiment, the neck section 13 comprises a transmission tube 131 and a heat dissipation reinforcement tube 132. One end of the transmission tube 131 is connected to the second part 122, and the heat dissipation reinforcement tube 132 is attached to the outside of the transmission tube 131 and arranged at intervals from the heat coupling section 12.

[0062] In this embodiment, the transfer tube 131 comprises a first end section 1311 and a second end section 1312, which are spaced apart from each other. The first end section 1311 is designed to extend into the second part 122 and is connected to the heat coupling section 12 via a snap-fit ​​and / or threaded connection. The second end section 1312 is designed to correspond to the extrusion assembly 182 and / or the material cutting assembly 183. The heat dissipation reinforcement tube 132 is located between the first end section 1311 and the second end section 1312, and the heat dissipation section 15 is also located between the first end section 1311 and the second end section 1312.

[0063] It is understood that the outer diameter of the first end section 1311 may be larger than that of other areas of the transmission pipe 131 in order to increase the assembly strength of the transmission pipe 131 and the second part 122.

[0064] In this embodiment, the heat dissipation section 15 is arranged at intervals from the heat coupling section 12, and the heat dissipation section 15 is attached to and connected with the outside of the neck section 13, and the heat dissipation reinforcement section is thermally coupled to the heat dissipation section 15.

[0065] The transfer pipe 131 can be made of a material with high strength and relatively low thermal conductivity, such as titanium, to prevent breakage and minimize heat transfer between the heat coupling section 12 and the heat dissipation section 15, thereby improving thermal efficiency. The heat dissipation reinforcement pipe 132 can be made of a material with relatively high thermal conductivity, such as copper, to further improve thermal efficiency between the transfer pipe 131 and the heat dissipation section 15, thereby increasing heat dissipation efficiency.

[0066] Specific embodiments of the present application are described above with reference to the figures. However, general technical personnel in this field will understand that various modifications and substitutions can be made to the specific embodiments of the present application without departing from the spirit and scope of the present application. These modifications and substitutions are all within the scope defined by the present application.

Claims

[1] Printhead assembly, characterized by that it includes the following: a printhead section; a heat coupling section comprising a first part and a second part, wherein the first part is connected to the printhead and the second part is designed to have a guide structure and a mounting structure, wherein the guide structure comprises an inclined guide surface and the mounting structure comprises a recessed fitting groove. [2] Printhead assembly according to claim 1, characterized by , that the printhead assembly is provided with a transmission channel for transferring consumables, wherein the transmission channel extends along a transmission direction and passes through the printhead and the heat coupling section, and wherein the guide structure and the mounting structure are arranged at an end of the heat coupling section away from the printhead along the transmission direction. [3] Printhead assembly according to claim 2, characterized by , that a first stage structure is provided at a boundary between the first part and the second part, and the first part is raised in at least one direction that intersects the transmission direction in order to form the first stage structure with respect to the second part. [4] Printhead assembly according to claim 3, characterized by that the guide structure and the assembly structure are arranged along the transmission direction on a side of the second part facing away from the first stage structure. [5] Printhead assembly according to claim 1, characterized by , that a transmission channel is opened through the printhead assembly along the transmission direction, and the guide structure and mounting structure are arranged on an outside of the second part relative to the transmission channel. [6] Printhead assembly according to claim 5, characterized by, that the inclined direction of the guide surface intersects the transmission direction, the guide surface corresponds to an outer surface of the guide structure, and the outer diameter of the guide structure increases along the transmission direction from the side facing away from the print head to the side facing the print head. [7] Printhead assembly according to claim 5, characterized by , that the fitting groove is formed by the fact that the outer surface of the heat coupling section is recessed towards the inner part in which the transmission channel is located, and the outer diameter of the place of the heat coupling section corresponding to the fitting groove is smaller than the outer diameter of other areas of the heat coupling section. [8] Printhead assembly according to claim 5, characterized bythat the guide structure is located along the transmission direction on a side of the mounting structure facing away from the printhead, and that the guide structure and the mounting structure are arranged around the transmission channel. [9] Printhead assembly according to claim 5, characterized by , that the second part further comprises a second stage structure, wherein the second stage structure is located on a side of the assembly structure facing the first part, and the outer diameter of the second stage structure on the side facing the first part is larger than the outer diameter of the second stage structure on the side facing away from the first part. [10] Printhead assembly according to claim 1, characterized by that the printhead assembly further comprises a neck section connected to one end of the second part, which is provided with the guide structure and the mounting structure. [11] Printhead assembly according to claim 10, characterized by, that a transmission channel is open on the printhead assembly, extending through it along a transmission direction, the transmission channel passing through the printhead, the heat coupling section and the neck section, and that the guide structure and the mounting structure are located on an outside of the transmission channel relative to the part of the neck section connected to the heat coupling section. [12] Printhead assembly according to claim 10, characterized by , that the neck section comprises a transmission tube and a heat dissipation reinforcement tube, wherein one end of the transmission tube is connected to the second part and the heat dissipation reinforcement tube is attached to the outside of the transmission tube and is spaced apart from the heat coupling section. [13] Printhead assembly according to claim 12, characterized by, that the printhead assembly further comprises a heat dissipation section, wherein the heat dissipation section is spaced apart from the heat coupling section, the heat dissipation section is attached to and connected with the outside of the neck section, and the heat dissipation reinforcement section is thermally coupled to the heat dissipation section. [14] Printhead assembly according to claim 1, characterized by , that the printhead assembly further comprises a connecting section, wherein the connecting section fits with the guide structure and is plugged onto the heat coupling section and has a mounting opening on the connecting section, wherein the mounting opening corresponds to the mounting structure and exposes at least part of the locating groove and a mounting element extends through the mounting opening into the locating groove to connect the heat coupling section to the connecting section. [15] Printhead mechanism comprising a printhead body and a printhead assembly according to any one of claims 1 to 14, wherein the printhead assembly is arranged on the printhead body. [16] 3D printer, characterized by that it comprises a 3D print body and a print head mechanism according to claim 15 or a print head assembly according to any one of claims 1 to 14.

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