Printing head assembly, printing head mechanism and three-dimensional printing equipment

Abstract

The embodiment of the utility model provides a printing head assembly, a printing head mechanism applying the printing head assembly and three-dimensional printing equipment. The printing head assembly comprises a printing head part and a thermal coupling part, the thermal coupling part comprises a first part and a second part, the first part is connected with the printing head part, the second part is constructed to be provided with a guide structure and a mounting structure, the guide structure comprises a guide surface which is obliquely arranged, and the mounting structure is arranged on the guide surface. And the mounting structure comprises a matching groove which is concavely arranged. The printing head mechanism comprises a printing head body and the printing head assembly, and the printing head assembly is arranged on the printing head body. The three-dimensional printing equipment comprises a three-dimensional printing main body and the printing head mechanism or the printing head assembly.

Description

Technical Field

[0001] This application relates to the field of stereoscopic printing, and more particularly to a printhead assembly, a printhead mechanism, and a stereoscopic printing device. Background Technology

[0002] 3D printing is a rapid prototyping technology that uses digital model files as a basis and employs adhesive materials such as special waxes, powdered metals, or plastics to create three-dimensional objects by printing layers of material. Fused deposition modeling (FDM) is one of the main 3D printing technologies. This technology involves heating and melting a thermoplastic filament, extruding it from a printhead, and depositing it onto a forming platform or a previously solidified layer of material to ultimately create the object. During 3D printing, the melting process of the filament within the printhead is crucial for the extrusion and printing of the filament, involving factors such as temperature and flow rate. Developing a printhead structure with better performance is a consideration for those skilled in the art. Utility Model Content

[0003] To address the problems in the prior art, embodiments of this application provide a printhead assembly, a printhead mechanism, and a stereoscopic printing device.

[0004] This application provides a printhead assembly, including:

[0005] Print header;

[0006] A thermal coupling part includes a first part and a second part. The first part is connected to the print head, and the second part is configured to have a guide structure and a mounting structure. The guide structure includes an inclined guide surface, and the mounting structure includes a recessed mating groove.

[0007] Understandably, the first part of the thermal coupling portion is connected to the print head to enable the print head assembly to extrude consumables from the print head, the second part of the thermal coupling portion includes a guide structure with an inclined guide surface to enable the second part to be easily connected to an external structure, and the second part of the thermal coupling portion includes a mounting structure with a recessed mating groove to enable the second part to be locked to the external structure.

[0008] In one embodiment, the printhead assembly has a transmission channel for transmitting consumables. The transmission channel extends along a transmission direction and passes through the printhead and the thermal coupling portion. The guide structure and the mounting structure are located along the transmission direction at the end of the thermal coupling portion away from the printhead.

[0009] In one embodiment, the junction of the first portion and the second portion has a first step structure, wherein the first portion protrudes relative to the second portion in at least one direction intersecting the transmission direction to form the first step structure.

[0010] In one embodiment, the guide structure and the mounting structure are disposed on the side of the second part opposite to the first step structure along the transmission direction.

[0011] In one embodiment, the printhead assembly has a transmission channel extending through it along a transmission direction, and the guide structure and the mounting structure are located on the outside of the second part relative to the transmission channel.

[0012] In one embodiment, the inclined direction of the guide surface intersects the transmission direction, the guide surface corresponds to the outer surface of the guide structure, and the outer diameter of the guide structure increases along the transmission direction from the side away from the print head to the side closer to the print head.

[0013] In one embodiment, the mating groove is formed by the outer surface of the thermal coupling portion recessing into the interior where the transmission channel is located, and the outer diameter of the thermal coupling portion corresponding to the mating groove is smaller than the outer diameter of other areas of the thermal coupling portion.

[0014] In one embodiment, the guide structure is disposed along the transmission direction on the side of the mounting structure away from the print head, and the guide structure and the mounting structure are arranged around the transmission channel.

[0015] In one embodiment, the second part further has a second step structure located on the side of the mounting structure closer to the first part, and the outer diameter of the second step structure on the side closer to the first part is larger than the outer diameter of the second step structure on the side away from the first part.

[0016] In one embodiment, the printhead assembly further includes a throat section, which is connected to one end of the second part that has the guide structure and the mounting structure.

[0017] In one embodiment, the printhead assembly has a transmission channel extending through it along a transmission direction. The transmission channel passes through the printhead, the thermal coupling portion, and the throat portion. The guide structure and the mounting structure are located outside the transmission channel relative to the portion of the throat portion that connects to the thermal coupling portion.

[0018] In one embodiment, the throat portion includes a transmission pipe and a heat dissipation enhancement pipe, one end of the transmission pipe is connected to the second portion, and the heat dissipation enhancement pipe is sleeved on the outside of the transmission pipe and spaced apart from the thermal coupling portion.

[0019] In one embodiment, the printhead assembly further includes a heat dissipation section, which is spaced apart from the thermal coupling section. The heat dissipation section is sleeved on the outside of the throat section and connected thereto, and the heat dissipation enhancement section is thermally coupled to the heat dissipation section.

[0020] In one embodiment, the printhead assembly further includes a connecting portion that mates with the guide structure and is fitted onto the thermal coupling portion. The connecting portion has a mounting hole that corresponds to the mounting structure and exposes at least a portion of the mating groove. A mounting member extends into the mating groove through the mounting hole to connect the thermal coupling portion and the connecting portion.

[0021] This application also provides a printhead mechanism, which includes a printhead body and a printhead assembly as described in any of the foregoing embodiments, wherein the printhead assembly is disposed on the printhead body.

[0022] This application also provides a stereoscopic printing apparatus, which includes a stereoscopic printing body and a printhead mechanism as described above or a printhead assembly as described in any of the foregoing embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the stereoscopic printing device provided in the embodiments of this application.

[0024] Figure 2 This is a schematic diagram of the printhead mechanism provided in an embodiment of this application.

[0025] Figure 3 This is a perspective view of the printhead assembly provided in an embodiment of this application.

[0026] Figure 4 This is a partial perspective view of a printhead assembly provided in an embodiment of this application.

[0027] Figure 5 for Figure 4 A cross-sectional view along the VV direction.

[0028] Figure 6 for Figure 5 A magnified view of the corresponding VI area.

[0029] Figure 7 This is a partial perspective view of a printhead assembly provided in an embodiment of this application.

[0030] Figure 8 This is a partial exploded perspective view of a printhead assembly provided in one embodiment of this application.

[0031] Explanation of main component symbols

[0032] Printhead assembly 10

[0033] Print Head 11

[0034] Thermal coupling part 12

[0035] Part 1, 121

[0036] Part Two, 122

[0037] Guide structure 123

[0038] Guide surface 1231

[0039] Installation structure 124

[0040] Mating groove 1241

[0041] First step structure 125

[0042] Second step structure 126

[0043] 13th larynx

[0044] Transmission tube 131

[0045] First end 1311

[0046] Second end 1312

[0047] Heat dissipation enhancement pipe 132

[0048] Heating section 14

[0049] Heating ring 141

[0050] Heating conductive element 142

[0051] Heat dissipation section 15

[0052] Connecting part 16

[0053] Section 161

[0054] Mounting hole 1611

[0055] 1612 Receiving hole

[0056] Third-stage structure 1613

[0057] Fourth step structure 1614

[0058] Section 2, 162

[0059] Section 3, 163

[0060] Connector 164

[0061] Sensor 165

[0062] Transmission Channel 17

[0063] Transmission direction Z

[0064] Printhead mechanism 1

[0065] Printhead body 18

[0066] Frame 181

[0067] Extrusion component 182

[0068] Material breakage assembly 183

[0069] 3D printing equipment 2

[0070] 20 3D Printed Body

[0071] Bracket 21

[0072] Molding platform 22

[0073] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0074] The following description will be given with reference to the accompanying drawings for a more complete description of the present application. The drawings illustrate exemplary embodiments of the present application. However, the present application may be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to limit the present application. As used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context clearly indicates otherwise. Furthermore, when used herein, “comprising” and / or “including” and / or “having,” integers, steps, operations, components, and / or components, but without excluding the presence or addition of one or more other features, regions, integers, steps, operations, components, and / or groups thereof. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Furthermore, unless explicitly defined herein, terms such as those defined in a general dictionary should be interpreted as having the same meaning as they have in the relevant technology and in the content of this application, and should not be interpreted as having an idealized or overly formal meaning.

[0075] Typically, 3D printing is a rapid prototyping technology that uses digital model files as a basis and employs adhesive materials such as special waxes, powdered metals, or plastics to create three-dimensional objects by printing layers of material. Fused deposition modeling (FDM) is one of the main 3D printing technologies. This technology involves heating and melting a thermoplastic filament, extruding it from a printhead, and depositing it onto a forming platform or a previously solidified layer of material to ultimately create the object. During 3D printing, the melting process of the filament within the printhead is crucial for the extrusion and printing of the filament, and this melting process involves factors such as temperature and flow rate. Therefore, providing a printhead structure with better performance is a consideration for those skilled in the art.

[0076] Correspondingly, embodiments of this application provide a printhead assembly, a printhead mechanism using the same, and a 3D printing device. The printhead assembly includes a printhead and a thermal coupling portion. The thermal coupling portion includes a first part and a second part. The first part is connected to the printhead, and the second part is configured with a guide structure and a mounting structure. The guide structure includes an inclined guide surface, and the mounting structure includes a recessed mating groove. The printhead mechanism includes a printhead body and the printhead assembly, with the printhead assembly disposed on the printhead body. The 3D printing device includes a 3D printing body and the aforementioned printhead mechanism or printhead assembly.

[0077] Furthermore, the first part of the thermal coupling portion is connected to the print head to enable the print head assembly to extrude consumables from the print head, the second part of the thermal coupling portion includes a guide structure with an inclined guide surface to enable the second part to be easily connected to an external structure, and the second part of the thermal coupling portion includes a mounting structure with a recessed mating groove to enable the second part to be locked to the external structure.

[0078] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments. It should be noted that components depicted in the drawings are not necessarily shown to scale; and identical or similar components will be designated with the same or similar reference numerals or similar technical terms.

[0079] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0080] like Figure 1 As shown, this application embodiment also provides a stereo printing device 2, which includes a stereo printing body 20 and a print head mechanism 1 or a print head assembly 10.

[0081] In one embodiment, the printhead assembly 10 may be included in the printhead mechanism 1.

[0082] In this embodiment, the stereoscopic printing body 20 includes a support 21 and a forming platform 22. The print head mechanism 1 and the forming platform 22 are respectively connected to the support 21. The print head mechanism 1 and the forming platform 22 can move relative to each other to achieve stereoscopic printing.

[0083] Further integration Figure 2 As shown, this application embodiment also provides a printhead mechanism 1, which includes a printhead body 18 and a printhead assembly 10, with the printhead assembly 10 disposed on the printhead body 18.

[0084] In one embodiment, the printhead body 18 includes a support frame 181, an extrusion assembly 182, and a cutting-off assembly 183. The printhead assembly 10, the extrusion assembly 182, and the cutting-off assembly 183 are all mounted on the support frame 181. The printhead mechanism 1 is connected to the stereoscopic printing body 20 through the support frame 181.

[0085] In this embodiment, a slide rail (not shown) may be provided on the support frame 181 for sliding the printhead mechanism 1 on the bracket 21. The printhead assembly 10 is disposed at the end of the support frame 181 along the consumable transport direction Z for melting and extruding the consumable; the extrusion assembly 182 is disposed upstream of the printhead assembly 10 in the consumable transport direction Z for driving the consumable to be fed to the printhead assembly 10; the blade (not shown) of the cutting assembly 183 can enter or exit the consumable transport channel between the extrusion assembly 182 and the printhead assembly 10 for cutting the consumable.

[0086] Further integration Figures 3 to 8 As shown, this application embodiment provides a printhead assembly 10, including a printhead 11, a thermal coupling portion 12, a throat portion 13, a heating portion 14, a heat dissipation portion 15, and a connecting portion 16. The printhead 11 is detachably connected to the thermal coupling portion 12 or integrally formed therefrom, and the throat portion 13 is connected to the thermal coupling portion 12; the heat dissipation portion 15 is spaced apart from the thermal coupling portion 12 and connected to the thermal coupling portion 12 through the connecting portion 16; the heating portion 14 can be configured to be separately arranged from the throat portion 13 and detachably connected, or the heating portion 14 can also be integrated into the thermal coupling portion 12 and integrally formed therefrom.

[0087] In one embodiment, the transmission channel 17 extends along the transmission direction Z and even penetrates the printhead assembly 10. The printhead assembly 10 has multiple interconnected cavities inside, which cooperate to form the transmission channel 17. In this embodiment, the transmission channel 17 passes through the printhead 11, the thermal coupling portion 12, and the throat portion 13. The heating portion 14 and the connecting portion 16 are located on the outer side of the thermal coupling portion 12 relative to the transmission channel 17, and the heat dissipation portion 15 is located on the outer side of the throat portion 13 relative to the transmission channel 17.

[0088] In one embodiment, the print head 11 is located at the downstream end of the thermal coupling portion 12 along the transmission direction Z; the heating portion 14 is sleeved on the thermal coupling portion 12 and is located upstream of the print head 11 in the transmission direction Z; the connecting portion 16 is located on the thermal coupling portion 12 and is located upstream of the thermal coupling portion 12 in the transmission direction Z; the throat portion 13 is connected to the other end of the thermal coupling portion 12 and is located upstream of the print head 11 in the transmission direction Z; and the heat dissipation portion 15 is sleeved on the throat portion 13 and is located upstream of the connecting portion 16 in the transmission direction Z.

[0089] In one embodiment, the thermal coupling portion 12 includes a first portion 121 and a second portion 122. The first portion 121 is connected to the print head 11, and the second portion 122 is configured to have a guide structure 123 and a mounting structure 124. The guide structure 123 includes an inclined guide surface 1231, and the mounting structure 124 includes a recessed mating groove 1241.

[0090] Understandably, the first part 121 of the thermal coupling part 12 is connected to the print head 11 to enable the print head assembly 10 to extrude consumables from the print head 11. The second part 122 of the thermal coupling part 12 includes a guide structure 123 with an inclined guide surface 1231 to enable the second part 122 to be easily connected to an external structure. The second part 122 of the thermal coupling part 12 includes a mounting structure 124 with a recessed mating groove 1241 to enable the second part 122 to be locked to the external structure.

[0091] In this embodiment, the first part 121 and the second part 122 are integrally formed. In other embodiments, the first part 121 and the second part 122 may also be non-integral, for example, detachably connected.

[0092] In one embodiment, the transmission channel 17 extends along the transmission direction Z and passes through the print head 11 and the thermal coupling part 12, and the guide structure 123 and the mounting structure 124 are disposed along the transmission direction Z at the end of the thermal coupling part 12 away from the print head 11.

[0093] Understandably, the first part 121 and the second part 122 are arranged along the transport direction Z. The end of the first part 121 away from the second part 122 along the transport direction Z is connected to the print head 11, and the end of the second part 122 away from the first part 121 is provided with a guide structure 123 and a mounting structure 124. That is, the thermal coupling part 12 is located downstream along the transport direction Z and is configured to connect the end for extruding consumables to the print head 11, while the thermal coupling part 12 is located upstream along the transport direction Z and is configured to connect to the end for connecting to the connecting part 16, and is provided with a guide structure 123 and a mounting structure 124.

[0094] In one embodiment, the first portion 121 and the second portion 122 have a first step structure 125 at the junction, wherein the first portion 121 protrudes relative to the second portion 122 in at least one direction intersecting the transmission direction Z to form the first step structure 125.

[0095] Understandably, the thermal coupling part 12 can be used to support the heating part 14 and thermally coupled with the heating part 14 to transfer heat to the transmission channel 17, thereby heating the consumable and helping it melt. The first step structure 125 can support the heating part 14, and the second part 122 can directly contact and thermally couple with the heating part 14. The second part 122 can be constructed as a single-layer structure made of a single material, which can reduce heat loss during the heat transfer process and improve thermal efficiency.

[0096] In one embodiment, the first portion 121 is generally frustum-shaped; at the junction of the first portion 121 and the second portion 122, the outer diameter of the first portion 121 is larger than the outer diameter of the second portion 122 to form a first step structure 125.

[0097] In one embodiment, the guide structure 123 and the mounting structure 124 are disposed on the side of the second part 122 away from the first step structure 125 along the transmission direction Z.

[0098] In this embodiment, the heating part 14 includes a heating ring 141, which is a hollow ring-shaped ceramic heating coil capable of generating heat through electrical current. The heating ring 141 is sleeved on the outside of the second part 122; one end of the heating ring 141 is supported by the first step structure 125 for supporting the heating ring 141; the other end of the heating ring 141 is located on the side of the guide structure 123 and the mounting structure 124 along the transmission direction Z, close to the print head 11, thereby exposing the guide structure 123 and the mounting structure 124.

[0099] Understandably, the heating part 14 may also include a heating conductive element 142, which is electrically connected to the heating ring 141 and is used to provide electrical energy to the heating ring 141.

[0100] In one embodiment, the connecting portion 16 includes a first section 161, a second section 162, and a third section 163, with the second section 162 and the third section 163 respectively connected to the first section 161. The first section 161 has a receiving hole 1612 extending through along the transmission direction Z for accommodating the second part 122; the second section 162 is used to accommodate the connector 164; and the third section 163 is used to accommodate the sensor 165.

[0101] In this embodiment, the second segment 162 extends from its connection with the first segment 161 toward the side deviating from the transmission channel 17. One end of the connector 164 is located in the mounting cavity and is connected to the second segment 162 by means of snap-fit, threaded connection, or abutment limit. The other end of the connector 164 is connected to the heat dissipation part 15 by means of snap-fit, threaded connection, or abutment limit.

[0102] In this embodiment, the third segment 163 extends from its connection with the first segment 161 toward a side offset from the transmission channel 17. The sensor 165 can be a temperature sensor or an infrared sensor for sensing the temperature of the printhead assembly 10. Furthermore, the sensor 165 is located close to the heating element 14 and the printhead assembly 10 via a receiving groove disposed in the third segment 163, for sensing the temperature of the heating element 14 and / or the thermal coupling element 12, and for monitoring the temperature of the molten consumable.

[0103] In this embodiment, the first segment 161 and the third segment 163 are symmetrically arranged 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 approximately the same. The length of the second segment 162 along the transmission direction Z can be constructed to be shorter than that of the third segment 163 and the first segment 161, which can help reduce the volume and weight of the connecting part 16, thereby achieving weight reduction.

[0104] In this embodiment, the connecting part 16 can be an integral structure; in other embodiments, the connecting part 16 can also be a separate structure.

[0105] In one embodiment, the guide structure 123 and the mounting structure 124 are disposed on the outer side of the second portion 122 relative to the transmission channel 17. It is understood that during the installation of the connecting portion 16 and the thermal coupling portion 12, the guide structure 123 and the mounting structure 124 disposed on the outer side can help to achieve the cooperation between the thermal coupling portion 12 and the connecting portion 16.

[0106] In one embodiment, the connecting portion 16 cooperates with the guide structure 123 and is sleeved on the thermal coupling portion 12.

[0107] In this embodiment, the guide structure 123 is arranged around the transmission channel 17, and the inclination direction of the guide surface 1231 intersects the transmission direction Z. 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 away from the print head 11 to the side closer to the print head 11, or the outer diameter of the guide structure 123 can also be set to gradually increase.

[0108] Understandably, during the installation of the thermal coupling part 12 and the connecting part 16, the connecting part 16 is usually approached and installed from the side of the second part 122 away from the first part 121. However, due to the structure of the connecting part 16, the second part 122 is blocked by the connecting part 16 during installation, making alignment difficult and installation challenging. The thermal coupling part 12 of this application includes a guide structure 123 with an inclined guide surface 1231. By guiding the installation process through the guide surface 1231, the installation accuracy and efficiency can be improved.

[0109] In one embodiment, the mating groove 1241 is formed by recessing the outer surface of the thermal coupling portion 12 toward the side where the transmission channel 17 is located, and the outer diameter of the thermal coupling portion 12 at the mating groove 1241 is smaller than the outer diameter of other areas of the thermal coupling portion 12.

[0110] In one embodiment, the connecting portion 16 has a mounting hole 1611, which corresponds to the mounting structure 124 and exposes at least a portion of the mating groove 1241. A mounting member (not shown) extends into the mating groove 1241 through the mounting hole 1611 to connect the thermal coupling portion 12 and the connecting portion 16.

[0111] In this embodiment, the guide structure 123 is disposed along the transmission direction Z on the side of the mounting structure 124 away from the print head 11, and the mounting structure 124 is disposed around the transmission channel 17.

[0112] Understandably, when the connecting part 16 is guided by the guide surface 1231 to match the position of the thermal coupling part 12, the mounting hole 1611 can correspond to the mating groove 1241, and the mounting member can extend into the mating groove 1241 through the mounting hole 1611. By tightening the mounting member, the thermal coupling part 12 and the connecting part 16 can be locked together. The mounting structure 124 is arranged around the transmission channel 17, so that the mounting hole 1611 can correspond to the mating groove 1241 without rotating the connecting part 16, thereby improving the ease of installation of the thermal coupling part 12 and the connecting part 16. In other embodiments, the mounting structure 124 may not be arranged around the transmission channel 17, and the mounting hole 1611 can also correspond to the mating groove 1241 by rotating the connecting part 16.

[0113] In one embodiment, the second portion 122 further has a second step structure 126 located on the side of the mounting structure 124 closer to the first portion 121. The outer diameter of the second step structure 126 on the side closer to the first portion 121 is larger than the outer diameter of the second step structure 126 on the side away from the first portion 121.

[0114] In this embodiment, a third step structure 1613 and a fourth step structure 1614 are formed on the connecting part 16. The third step structure 1613 is used to abut against the second step structure 126, and the fourth step structure 1614 is used to abut against the end of the heating ring 141 that is away from the first step structure 125 along the transmission direction Z.

[0115] Understandably, the two opposite ends of the heating ring 141 along the Z-direction of transmission are held by the connecting part 16 and the thermal coupling part 12, respectively, thereby fixing the heating ring 141. The fourth step structure 1614 and the third step structure 1613 are spaced apart along the Z-direction of transmission, and the connecting part 16 and the thermal coupling part 12 are held by the second step structure 126 and the third step structure 1613. This not only realizes the installation and positioning between the thermal coupling part 12 and the connecting part 16, but also avoids the connecting part 16 from unrestrictedly squeezing the heating ring 141 and even causing damage to the heating ring 141.

[0116] In one embodiment, the second part 122 is provided with a guide structure 123 and a mounting structure 124, one end of which is connected to the throat section 13. The transmission channel 17 passes through the print head 11, the thermal coupling section 12, and the throat section 13, and the guide structure 123 and the mounting structure 124 are located outside the transmission channel 17 relative to the portion of the throat section 13 connected to the thermal coupling section 12.

[0117] In one embodiment, the throat portion 13 includes a transmission pipe 131 and a heat dissipation enhancement pipe 132. One end of the transmission pipe 131 is connected to the second portion 122, and the heat dissipation enhancement pipe 132 is sleeved on the outside of the transmission pipe 131 and spaced apart from the thermal coupling portion 12.

[0118] In this embodiment, the transfer pipe 131 includes a first end 1311 and a second end 1312 spaced apart. The first end 1311 extends into the second portion 122 and is connected to the thermal coupling portion 12 by means of snap-fit ​​and / or threaded connection. The second end 1312 is provided corresponding to the extrusion assembly 182 and / or the material cutting assembly 183. The heat dissipation enhancement pipe 132 is located between the first end 1311 and the second end 1312, and the heat dissipation portion 15 is also provided between the first end 1311 and the second end 1312.

[0119] Understandably, the outer diameter of the first end 1311 can be larger than the outer diameter of other areas of the transmission pipe 131 in order to improve the installation strength of the transmission pipe 131 and the second part 122.

[0120] In this embodiment, the heat dissipation part 15 and the thermal coupling part 12 are spaced apart. The heat dissipation part 15 is sleeved on the outside of the throat part 13 and connected to it. The heat dissipation enhancement part is thermally coupled to the heat dissipation part 15.

[0121] Understandably, the transmission pipe 131 can be made of a material with high strength and relatively low thermal conductivity, such as titanium, to avoid breakage and minimize heat transfer between the thermal coupling part 12 and the heat dissipation part 15, thereby improving thermal efficiency. The heat dissipation enhancement pipe 132 can be made of a material with relatively high thermal conductivity, such as copper, to improve the thermal efficiency between the transmission pipe 131 and the heat dissipation part 15, thereby improving heat dissipation efficiency.

[0122] The specific embodiments of this application have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that various changes and substitutions can be made to the specific embodiments of this application without departing from the spirit and scope of this application. All such changes and substitutions fall within the scope defined by this application.

Claims

1. A printhead assembly, characterized in that, include: Print header; A thermal coupling part includes a first part and a second part. The first part is connected to the print head, and the second part is configured to have a guide structure and a mounting structure. The guide structure includes an inclined guide surface, and the mounting structure includes a recessed mating groove.

2. The printhead assembly as claimed in claim 1, characterized in that, The printhead assembly has a transmission channel for transmitting consumables. The transmission channel extends along a transmission direction and passes through the printhead and the thermal coupling part. The guide structure and the mounting structure are located along the transmission direction at the end of the thermal coupling part away from the printhead.

3. The printhead assembly as described in claim 2, characterized in that, The first part and the second part have a first step structure at the junction, and the first part protrudes from the second part in at least one direction intersecting the transmission direction to form the first step structure.

4. The printhead assembly as claimed in claim 3, characterized in that, The guide structure and the mounting structure are located on the side of the second part opposite to the first step structure along the transmission direction.

5. The printhead assembly as claimed in claim 1, characterized in that, The printhead assembly has a transmission channel extending through it along a transmission direction, and the guide structure and the mounting structure are located on the outside of the second part relative to the transmission channel.

6. The printhead assembly as claimed in claim 5, characterized in that, The inclined direction of the guide surface intersects the transmission direction, the guide surface corresponds to the outer surface of the guide structure, and the outer diameter of the guide structure increases along the transmission direction from the side away from the print head to the side closer to the print head.

7. The printhead assembly as claimed in claim 5, characterized in that, The mating groove is formed by the outer surface of the thermal coupling part being recessed towards the interior of the transmission channel, and the outer diameter of the thermal coupling part corresponding to the mating groove is smaller than the outer diameter of other areas of the thermal coupling part.

8. The printhead assembly as claimed in claim 5, characterized in that, The guide structure is located on the side of the mounting structure away from the print head along the transmission direction, and the guide structure and the mounting structure are arranged around the transmission channel.

9. The printhead assembly as claimed in claim 5, characterized in that, The second part also has a second step structure, which is located on the side of the mounting structure closer to the first part. The outer diameter of the second step structure on the side closer to the first part is larger than the outer diameter of the second step structure on the side away from the first part.

10. The printhead assembly as claimed in claim 1, characterized in that, The printhead assembly also includes a throat section, which is connected to one end of the second part that has the guide structure and the mounting structure.

11. The printhead assembly as claimed in claim 10, characterized in that, The printhead assembly has a transmission channel extending through it along a transmission direction. The transmission channel passes through the printhead, the thermal coupling part, and the throat part. The guide structure and the mounting structure are located outside the transmission channel relative to the portion of the throat part that connects to the thermal coupling part.

12. The printhead assembly as claimed in claim 10, characterized in that, The throat section includes a transmission pipe and a heat dissipation enhancement pipe. One end of the transmission pipe is connected to the second part, and the heat dissipation enhancement pipe is sleeved on the outside of the transmission pipe and spaced apart from the thermal coupling part.

13. The printhead assembly as claimed in claim 12, characterized in that, The printhead assembly also includes a heat dissipation section, which is spaced apart from the thermal coupling section. The heat dissipation section is sleeved on the outside of the throat section and connected thereto. The heat dissipation enhancement tube is thermally coupled to the heat dissipation section.

14. The printhead assembly as claimed in claim 1, characterized in that, The printhead assembly further includes a connecting part that mates with the guide structure and is fitted onto the thermal coupling part. The connecting part has a mounting hole that corresponds to the mounting structure and exposes at least a portion of the mating groove. A mounting member extends into the mating groove through the mounting hole to connect the thermal coupling part and the connecting part.

15. A printhead mechanism, characterized in that, It includes a printhead body and a printhead assembly as described in any one of claims 1 to 14, the printhead assembly being disposed on the printhead body.

16. A stereoscopic printing device, characterized in that, It includes a stereolithography body and a printhead mechanism as described in claim 15 or a printhead assembly as described in any one of claims 1 to 14.

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