Spray head unit and 3D printing equipment applying same

Abstract

The embodiment of the utility model provides a spray head unit and 3D printing equipment applying the same. The spray head unit comprises a first bracket, a nozzle assembly and a mounting assembly; the nozzle assembly is connected with the first bracket; the mounting assembly is connected with the first bracket, and the mounting assembly is detachably connected with the nozzle assembly; wherein the mounting assembly comprises a second support and a movable part, the second support is connected with the first support, the movable part is rotationally connected with the second support, and the movable part is movably connected with the second support so that locking of the mounting assembly on the nozzle assembly can be achieved or released.

Description

Technical Field

[0001] This application relates to the field of 3D printing, and particularly to a nozzle unit and a 3D printing device using the same. Background Art

[0002] 3D printing technology is a rapid prototyping technology that uses a digital model file as a basis, applies special wax materials, powdered metals or plastics and other bondable materials, and manufactures three-dimensional objects by printing layer upon layer of materials. The printing material melts and is extruded at the nozzle, and finally forms. To ensure printing accuracy, the nozzle usually needs to be fixed to avoid errors caused by the nozzle shaking during the printing process. In the prior art, the nozzle is usually fixed to other structures such as a bracket and connected by fastening methods such as threads. Although the printing accuracy is ensured, the installation process or the printing process of the nozzle will become more complicated. How to solve the above problems is what those skilled in the art need to consider. Summary of the Utility Model

[0003] To solve the problems in the prior art, the embodiments of this application provide a nozzle unit with more convenient disassembly and assembly and a 3D printing device using the same.

[0004] The embodiments of this application provide a nozzle unit, which includes a first bracket, a nozzle assembly and an installation assembly; the nozzle assembly is connected to the first bracket; the installation assembly is connected to the first bracket, and the installation assembly is detachably connected to the nozzle assembly; wherein, the installation assembly includes a second bracket and a movable member, the second bracket is connected to the first bracket, the movable member is rotatably connected to the second bracket, and the movable member is movably connected to the second bracket to realize or release the locking of the installation assembly to the nozzle assembly.

[0005] In one embodiment, one of the second bracket and the movable member is provided with a convex-shaped clamping protrusion, and the other of the second bracket and the movable member is provided with a concave-shaped clamping groove, and the clamping protrusion is detachably clamped in the clamping groove.

[0006] In one embodiment, the second bracket and the movable member cooperate to form an installation hole for the nozzle assembly to pass through, and the second bracket and the movable member are detachably connected to open or lock the installation hole.

[0007] In one embodiment, the second bracket is provided with a concave-shaped clamping groove, and the movable member has a convex-shaped clamping protrusion, and the shape of the clamping protrusion matches the shape of the clamping groove.

[0008] In one embodiment, the movable member includes a first connecting arm and a second connecting arm that are connected and intersect. The first connecting arm is rotatably connected to the second bracket, and the second connecting arm is detachably connected to the second bracket. The second connecting arm includes a convex lug protruding therefrom, and the second bracket has a card slot matching the shape of the convex lug.

[0009] In one embodiment, the second bracket includes a first protruding portion and a second protruding portion arranged at intervals. The first connecting arm is rotatably connected to the first protruding portion, and the second connecting arm is detachably connected to the second protruding portion. The card slot is provided on a side of the second protruding portion facing away from the first protruding portion, and the card slot is recessed toward the side where the first protruding portion is located. The convex lug is provided on a side of the second connecting arm facing the side where the first protruding portion is located.

[0010] In one embodiment, the second bracket includes a first protruding portion, and the first protruding portion is provided with a rotating slot. The first connecting arm includes a first end portion, and the first end portion is received in the rotating slot. The first end portion and the first protruding portion are connected by a pin, and the first end portion is configured to rotate in the rotating slot with the pin as an axis.

[0011] In one embodiment, the second bracket includes a second protruding portion, and the second protruding portion includes a supporting step for supporting the first connecting arm. The first connecting arm is provided with a first assembly hole, and the second protruding portion is provided with a second assembly hole. The first assembly hole and the second assembly hole are configured to be oppositely arranged and communicated when the convex lug is arranged in the card slot.

[0012] In one embodiment, the second bracket further includes a connecting plate. The first protruding portion and the second protruding portion are arranged at intervals and are respectively connected to the connecting plate. The first connecting arm is rotatably connected to the first protruding portion, and the second connecting arm is detachably connected to the second protruding portion. The connecting plate, the first protruding portion, the second protruding portion and the installation component enclose to form an installation hole, and the nozzle assembly is arranged through the installation hole.

[0013] In one embodiment, the first protruding portion and the second protruding portion are arranged on the same side of the connecting plate away from the first bracket. The first connecting arm is located on a side of the first protruding portion and the second protruding portion facing away from the connecting plate. The second connecting arm is located between the first connecting arm and the connecting plate. The second connecting arm is provided with an integral convex structure or a split convex structure on a side facing the installation hole.

[0014] The embodiment of the present application further provides a 3D printing device, which includes a forming platform, a driving component, and a nozzle unit as described in any one of the foregoing embodiments. The driving component drives the nozzle unit to move relative to the forming platform.

[0015] Further, in the nozzle unit of the present application, the nozzle assembly is connected to the first bracket for preliminary fixation of the nozzle assembly; the nozzle assembly is further detachably connected to the mounting assembly connected to the first bracket for further fixation of the nozzle assembly. The movable member is rotatably connected to the second bracket, so that the mounting assembly has the function of locking or unlocking the nozzle assembly. The movable member is movably connected to the second bracket to lock or unlock the nozzle assembly by the mounting assembly, that is, by adjusting the connection relationship or relative position between the movable member and the second bracket that are movably connected, the mounting assembly can lock or unlock the nozzle, reducing the installation difficulty of the nozzle unit and making the installation and / or disassembly process of the nozzle unit more convenient. Description of the Drawings

[0016] Figure 1 It is a three-dimensional schematic diagram of a nozzle unit provided by an embodiment of the present application from an angle.

[0017] Figure 2 It is a three-dimensional schematic diagram of the nozzle unit provided by an embodiment of the present application from another angle.

[0018] Figure 3 It is a partial three-dimensional schematic diagram of the nozzle unit provided by an embodiment of the present application.

[0019] Figure 4 It is a partial three-dimensional exploded schematic diagram of the nozzle unit provided by an embodiment of the present application.

[0020] Figure 5 It is a three-dimensional schematic diagram of the mounting assembly of the nozzle unit provided by an embodiment of the present application.

[0021] Figure 6 It is a state schematic diagram of the mounting assembly of the nozzle unit provided by an embodiment of the present application from an angle.

[0022] Figure 7 It is a state schematic diagram of the mounting assembly of the nozzle unit provided by an embodiment of the present application from another angle.

[0023] Figure 8 It is a three-dimensional schematic diagram of the 3D printing device provided by an embodiment of the present application.

[0024] Description of the Main Element Symbols

[0025] Nozzle unit 10

[0026] First bracket 11

[0027] Assembly groove 110

[0028] Nozzle assembly 12

[0029] First part 121

[0030] Second part 122

[0031] Transition part 123

[0032] Installation assembly 13

[0033] Movable part 131

[0034] First connecting arm 1311

[0035] First end 13111

[0036] First assembly hole 13112

[0037] Second connecting arm 1312

[0038] Latching projection 13121

[0039] Second bracket 132

[0040] Installation hole 1320

[0041] First protruding part 1321

[0042] Rotating groove 13211

[0043] Second protruding part 1322

[0044] Card slot 13221

[0045] Second assembly hole 13222

[0046] Supporting step 13223

[0047] Connecting plate 1323

[0048] Concave structure 13231

[0049] Connecting part 1324

[0050] Pin 1325

[0051] Cooling assembly 14

[0052] Extrusion assembly 15

[0053] 3D printing device 1

[0054] Drive assembly 16

[0055] Forming platform 18

[0056] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. Specific Embodiments

[0057] The following description will refer to the drawings to more comprehensively describe the content of the present application. The exemplary embodiments of the present application are shown in the drawings. However, the present application can 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 terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. In addition, when used herein, "comprising" and / or "including" and / or "having", integers, steps, operations, components and / or components, but do not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or their groups. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In addition, unless clearly defined in the text, terms such as those defined in a general dictionary should be construed as having a meaning consistent with their meaning in the relevant art and the content of this application, and will not be construed as idealized or overly formal meanings.

[0058] Generally, 3D printing technology is a rapid prototyping technology that uses a digital model file as a basis and applies special wax materials, powdered metals, plastics and other bondable materials to manufacture three-dimensional objects by printing layer upon layer of materials. The printing material melts and extrudes at the nozzle, and finally forms. To ensure the printing accuracy, it is usually necessary to fix the nozzle to avoid errors caused by the shaking of the nozzle during the printing process. In the prior art, the nozzle is usually fixed to other structures such as a bracket and connected by a fastening method such as a thread. Although the printing accuracy is ensured, the installation process or the printing process of the nozzle will become more complicated. How to solve the above problems is what those skilled in the art need to consider.

[0059] Correspondingly, the embodiment of the present application provides a nozzle unit and a 3D printing device applying the same. The nozzle unit includes a first bracket, a nozzle assembly and an installation assembly; the nozzle assembly is connected to the first bracket; the installation assembly is connected to the first bracket, and the installation assembly is detachably connected to the nozzle assembly; wherein, the installation assembly includes a second bracket and a movable member, the second bracket is connected to the first bracket, the movable member is rotatably connected to the second bracket, and the movable member is movably connected to the second bracket to realize or release the locking of the installation assembly to the nozzle assembly.

[0060] Furthermore, in the spray head unit of the present application, the nozzle assembly is connected to the first bracket for preliminary fixation of the nozzle assembly; the nozzle assembly is further detachably connected to the mounting assembly connected to the first bracket for further fixation of the nozzle assembly. The movable member is rotatably connected to the second bracket, enabling the mounting assembly to lock or unlock the nozzle assembly. The movable member is movably connected to the second bracket to lock or unlock the nozzle assembly by the mounting assembly, that is, by adjusting the connection relationship or relative position between the movable member and the second bracket of the movable connection, the mounting assembly can lock or unlock the nozzle, reducing the installation difficulty of the spray head unit and making the installation and / or disassembly process of the spray head unit more convenient.

[0061] Those skilled in the art can understand that "3D printing" refers to a technology that constructs an object by layer-by-layer printing based on a digital model file, using powdered metal, plastic, or other bondable materials.

[0062] The following content will describe exemplary embodiments in conjunction with the accompanying drawings. It should be noted that the components depicted in the reference drawings are not necessarily shown to scale; identical or similar components will be given the same or similar reference numerals or similar technical terms.

[0063] The following will further describe in detail the specific embodiments of the present application with reference to the accompanying drawings.

[0064] As Figures 1 to 4 shown, an embodiment of the present application provides a spray head unit 10, which includes a first bracket 11, a nozzle assembly 12, and a mounting assembly 13. The first bracket 11 can be the main support bracket of the spray head unit 10, and the first bracket 11 can also be used to carry other components that may be included in the spray head unit 10, such as a cooling assembly 14 and / or an extrusion assembly 15. The nozzle assembly 12 is connected to the first bracket 11, and the nozzle assembly 12 can be used for melting and extruding consumables. One end of the nozzle assembly 12 is fixed by the first bracket 11, and the other end of the nozzle assembly 12 is fixed by the mounting assembly 13. The mounting assembly 13 is connected to the first bracket 11, and the mounting assembly 13 is detachably connected to the nozzle assembly 12. The mounting assembly 13 is disposed on one side of the first bracket 11, specifically, on the side of the first bracket 11 close to the nozzle assembly 12 for extruding consumables. The end of the nozzle assembly 12 for extruding consumables is detachably connected to the mounting assembly 13 to achieve quick disassembly of the nozzle assembly 12.

[0065] In one embodiment, the mounting assembly 13 includes a second bracket 132 and a movable member 131. The movable member 131 is movably connected to the second bracket 132 to lock or unlock the nozzle assembly 12 by the mounting assembly 13. The second bracket 132 is connected to the first bracket 11, and the movable member 131 is rotatably connected to the second bracket 132. One of the second bracket 132 and the movable member 131 is provided with a convex locking projection 13121, and the other of the second bracket 132 and the movable member 131 is provided with a concave locking groove 13221. The locking projection 13121 is detachably engaged in the locking groove 13221.

[0066] It can be understood that in the spray head unit 10 of the present application, the nozzle assembly 12 is connected to the first bracket 11 for preliminary fixing of the nozzle assembly 12; the nozzle assembly 12 is further detachably connected to the mounting assembly 13 connected to the first bracket 11 for further fixing of the nozzle assembly 12. The movable member 131 is rotatably connected to the second bracket 132, so that the mounting assembly 13 has the function of locking or unlocking the nozzle assembly 12.

[0067] It can be understood that one of the second bracket 132 and the movable member 131 is provided with a convex locking projection 13121, and the other of the second bracket 132 and the movable member 131 is provided with a concave locking groove 13221. The locking projection 13121 is detachably engaged in the locking groove 13221, so that the movable member 131 is detachably connected to the second bracket 132. This disassembly and installation method is convenient and fast and has good fixing strength, and can be realized without installing or disassembling other parts. Quick disassembly between the mounting assembly 13 and the second bracket 132 can be achieved, and further quick disassembly of the nozzle assembly 12 can be realized, making the installation and disassembly process of the spray head unit 10 faster while ensuring the installation strength of the nozzle assembly 12.

[0068] In one embodiment, the second bracket 132 and the movable member 131 cooperate to form a mounting hole 1320 for the nozzle assembly 12 to pass through. The second bracket 132 is detachably connected to the movable member 131 for opening or closing the mounting hole 1320.

[0069] It can be understood that the detachable connection between the second bracket 132 and the movable member 131 enables the mounting hole 1320 formed by their cooperation to be opened or closed; when opened, the locking projection 13121 is located in the locking groove 13221, and the nozzle assembly 12 is locked and fixed; when closed, the locking projection 13121 is outside the locking groove 13221, and the nozzle assembly 12 is not locked.

[0070] In one embodiment, the second bracket 132 and the movable member 131 can form the mounting hole 1320 by forming a notch on the second bracket 132 and blocking the notch by the movable member 131.

[0071] Alternatively, in another embodiment, a notch may be formed on the movable member 131 and blocked by the second bracket 132, or partial notches are formed on both the movable member 131 and the second bracket 132 and the two partial notches are in communication and cooperation.

[0072] In this embodiment, taking the example of forming a notch on the second bracket 132 and blocking the notch by the movable member 131 for display. Those skilled in the art can understand that the other implementation manners in the foregoing other embodiments can also achieve the cooperation between the mounting assembly 13 and the nozzle assembly 12.

[0073] In one embodiment, a recessed card slot 13221 is provided on the second bracket 132, and the movable member 131 has a protruding card projection 13121, and the shape of the card projection 13121 matches the shape of the card slot 13221.

[0074] In other embodiments, a recessed card slot 13221 may also be provided on the movable member 131, and the second bracket 132 has a protruding card projection 13121, and the shape of the card projection 13121 matches the shape of the card slot 13221.

[0075] Those skilled in the art can understand that no matter the positions of the card projections 13121 and the card slots 13221 provided on the movable member 131 and the second bracket 132 can be interchanged as described in the foregoing embodiments, the quick disassembly between the movable member 131 and the second bracket 132 can be achieved.

[0076] In one embodiment, the second bracket 132 is connected to the first bracket 11. The movable member 131 includes a first connecting arm 1311 and a second connecting arm 1312 that are connected and intersect. The first connecting arm 1311 is rotatably connected to the second bracket 132, and the second connecting arm 1312 is detachably connected to the second bracket 132. The second connecting arm 1312 includes a protruding card projection 13121, and the second bracket 132 has a card slot 13221 that matches the shape of the card projection 13121, and the card projection 13121 is detachably clamped in the card slot 13221.

[0077] Furthermore, the second bracket 132 is connected to the first bracket 11 and the first connecting arm 1311 is rotatably connected to the second bracket 132, so that the movable member 131 can rotate relative to the second bracket 132, enabling the mounting assembly 13 to have the function of locking or unlocking the nozzle assembly 12. The second connecting arm 1312 is connected to and intersects with the first connecting arm 1311, and the card projection 13121 is detachably clamped in the card slot 13221 that matches its shape, so that the second connecting arm 1312 is detachably connected to the second bracket 132. This disassembly and installation method is convenient and fast and has good fixing strength.

[0078] In one embodiment, the nozzle assembly 12 includes a connected first part 121, a second part 122, and a transition part 123. The first part 121 is connected to the first bracket 11, and the second part 122 is connected to the first part 121 through the transition part 123. An installation hole 1320 is formed in the installation assembly 13, and the transition part 123 is received in the installation hole 1320. The first part 121 and the second part 122 are respectively located on opposite sides of the movable member 131 and are spaced apart from the movable member 131. The outer diameter of the first part 121 is greater than the outer diameter of the installation hole 1320.

[0079] In this embodiment, the first part 121 can correspond to the main heat dissipation area of the nozzle assembly 12, the second part 122 can correspond to the main heating area of the nozzle assembly 12, and the transition part 123 can correspond to the throat area of the nozzle assembly 12. The first part 121 is connected to the first bracket 11 and is located within the extension area of the first bracket 11. The second part 122 is connected to the first bracket 11 through the transition part 123 and the first part 121, and the second part 122 extends outside the extension area of the first bracket 11 to prevent the first bracket 11 from interfering with the printing of the nozzle assembly 12.

[0080] It can be understood that the first part 121 usually has a heat dissipation structure and its outer diameter is usually larger than that of the throat area. The second part 122 usually has a heating and / or heat preservation structure and its outer diameter is usually larger than that of the throat area. After the throat area is received in the installation hole 1320, neither the first part 121 nor the second part 122 can pass through the installation hole 1320, realizing the locking of the nozzle assembly 12 by the installation assembly 13.

[0081] Further in combination with Figure 3 and Figure 4 As shown, in one embodiment, the second bracket 132 includes a connecting plate 1323, a first protruding portion 1321, and a second protruding portion 1322. The first protruding portion 1321 and the second protruding portion 1322 are spaced apart from each other and are respectively connected to the connecting plate 1323. The first connecting arm 1311 is rotatably connected to the first protruding portion 1321, and the second connecting arm 1312 is detachably connected to the second protruding portion 1322. The connecting plate 1323, the first protruding portion 1321, the second protruding portion 1322, and the installation assembly 13 enclose to form an installation hole 1320, and the nozzle assembly 12 is disposed through the installation hole 1320.

[0082] In this embodiment, the connecting plate 1323 is disposed substantially perpendicular to the first bracket 11. On a side of the connecting plate 1323 away from the junction with the first bracket 11, a recessed structure 13231 is formed toward the first bracket 11. The first protruding portion 1321 and the second protruding portion 1322 are respectively located on two sides of the recessed structure 13231, and both the first protruding portion 1321 and the second protruding portion 1322 protrude toward the same side of the connecting plate 1323 away from the first bracket 11, expanding the area corresponding to the mounting hole 1320 on the basis of the recessed structure 13231, so that the mounting hole 1320 can accommodate the connecting portion 1324.

[0083] In an embodiment, the second bracket 132 further includes a connecting portion 1324. The connecting portion 1324 is connected to the connecting plate 1323 and protrudes toward the side where the first bracket 11 is located. The second bracket 132 is connected to the first bracket 11 through the connecting portion 1324. The first protruding portion 1321 and the second protruding portion 1322 protrude on the same side of the connecting portion 1324 relative to the connecting plate 1323.

[0084] In this embodiment, a plurality of assembly grooves 110 are formed on a side of the first bracket 11 facing away from the nozzle assembly 12. The second bracket 132 includes a plurality of connecting portions 1324. The plurality of connecting portions 1324 respectively correspond to the plurality of assembly grooves 110 one by one. The connecting portion 1324 disposed in the assembly groove 110 can be mounted on the first bracket 11 through a locking screw (not shown in the figure).

[0085] It can be understood that the connecting portion 1324 is located on two opposite sides of the second bracket 132 relative to the first protruding portion 1321 and the second protruding portion 1322. The connecting portion 1324 is disposed substantially perpendicular to the second bracket 132 and substantially parallel to the first bracket 11. The locking screw connecting the first bracket 11 and the connecting portion 1324 is locked in a direction substantially perpendicular to the connecting portion 1324 and the first bracket 11, enhancing the connection strength between the second bracket 132 and the first bracket 11.

[0086] Further in combination with Figures 5 to 7 As shown, in an embodiment, the first connecting arm 1311 is rotatably connected to the first protruding portion 1321, and the second connecting arm 1312 is detachably connected to the second protruding portion 1322. A card slot 13221 is formed on a side of the second protruding portion 1322 facing away from the first protruding portion 1321. The card slot 13221 is recessed toward the side where the first protruding portion 1321 is located. A card protrusion 13121 is formed on a side of the second connecting arm 1312 facing the side where the first protruding portion 1321 is located.

[0087] In this embodiment, the first connecting arm 1311 and the second connecting arm 1312 are disposed substantially perpendicular to each other. The second connecting arm 1312 is disposed on the side of the first connecting arm 1311 away from the side where it is connected to the first protruding portion 1321. When the first connecting arm 1311 rotates to be able to contact the second protruding portion 1322, the second connecting arm 1312 moves to the side of the second protruding portion 1322 away from the first protruding portion 1321 and contacts the surface of the second protruding portion 1322 away from the first protruding portion 1321. Both the first connecting arm 1311 and the second connecting arm 1312 have a certain deformation ability, and the second connecting arm 1312 and the second protruding portion 1322 are configured to achieve snap connection in a tight-fitting manner.

[0088] It can be understood that the snap projection 13121 may have an arc-shaped protruding surface, and the card slot 13221 has an arc-shaped concave surface matching the shape of the snap projection 13121. At the same time, the first connecting arm 1311 and the second connecting arm 1312 have a certain elastic deformation ability, so that the first connecting arm 1311 and the second connecting arm 1312 can achieve the snap connection and disassembly of the second connecting arm 1312 and the second protruding portion 1322 through slight deformation. At the same time, the second connecting arm 1312 and the second protruding portion 1322 arranged in a tight-fitting manner can have a better connection effect.

[0089] In one embodiment, the first protruding portion 1321 is provided with a rotation groove 13211. The first connecting arm 1311 includes a first end portion 13111, and the first end portion 13111 is received in the rotation groove 13211. The first end portion 13111 and the first protruding portion 1321 are connected by a pin 1325, and the first end portion 13111 is configured to be rotatably disposed in the rotation groove 13211 with the pin 1325 as an axis.

[0090] In one embodiment, the second protruding portion 1322 includes a supporting step 13223 for supporting the first connecting arm 1311. The first connecting arm 1311 is provided with a first assembly hole 13112, and the second protruding portion 1322 is provided with a second assembly hole 13222. The first assembly hole 13112 and the second assembly hole 13222 are configured to be oppositely arranged and communicated when the snap projection 13121 is disposed in the card slot 13221.

[0091] In this embodiment, the first connecting arm 1311 is configured to be generally cuboid-shaped, and the rotation groove 13211 and the second assembly hole 13222 are generally at the same horizontal position; after the second connecting arm 1312 is engaged with the second protruding portion 1322, the first assembly hole 13112 and the second assembly hole 13222 can be oppositely arranged and communicated, and then a locking bolt is disposed in the first assembly hole 13112 and the second assembly hole 13222, so that the first connecting arm 1311 and the second protruding portion 1322 can also be locked and connected, further improving the installation strength between the movable member 131 and the second bracket 132.

[0092] In this embodiment, the rotation groove 13211 and the second assembly hole 13222 are located on the side of the second bracket 132 away from the supporting step 13223, that is, the rotation groove 13211 and the second assembly hole 13222 are arranged relative to the second part 122 of the nozzle assembly 12 that is further away. At the same time, the movable member 131 supported by the supporting step 13223 is also configured to be spaced apart from the second part 122 of the nozzle assembly 12, so as to prevent excessive heat of the second part 122 from being transferred to the movable member 131 and avoid the temperature of the movable member 131 from being too high.

[0093] In one embodiment, the first protruding portion 1321 and the second protruding portion 1322 are provided on the same side of the connecting plate 1323 away from the first bracket 11, the first connecting arm 1311 is located on the side of the first protruding portion 1321 and the second protruding portion 1322 away from the connecting plate 1323, and the second connecting arm 1312 is located between the first connecting arm 1311 and the connecting plate 1323.

[0094] Further in combination with Figure 8 As shown, the embodiment of the present application further provides a 3D printing device 1, which includes a forming platform 18, a driving component 16, and a nozzle unit 10 as described in any one of the foregoing embodiments. The driving component 16 drives the nozzle unit 10 to move relative to the forming platform 18.

[0095] In the foregoing, the specific embodiments of the present application have been described with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that various changes 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 changes and substitutions all fall within the scope defined by the present application.

Claims

1. A nozzle unit, characterized in that, include: First bracket; a nozzle assembly connected to the first bracket; A mounting assembly connected to the first bracket, wherein the mounting assembly is detachably connected to the nozzle assembly; Wherein, the mounting assembly includes a second bracket and a movable part, the second bracket is connected to the first bracket, the movable part is rotatably connected to the second bracket, and the movable part is movably connected to the second bracket to realize or release the locking of the nozzle assembly by the mounting assembly.

2. The spray head unit according to claim 1, characterized in that, One of the second bracket and the movable member is provided with a protruding locking protrusion, and the other of the second bracket and the movable member is provided with a recessed locking groove, and the locking protrusion is detachably locked in the locking groove.

3. The nozzle unit according to claim 1, characterized in that, The second bracket cooperates with the movable part to form a mounting hole, and the mounting hole is used for the nozzle assembly to pass through it. The second bracket is detachably connected to the movable part to open or close or lock the mounting hole.

4. The spray head unit according to claim 2, characterized in that, The second bracket is provided with a recessed slot, and the movable member has a protruding protrusion, the shape of which matches the shape of the slot.

5. The nozzle unit according to claim 4, wherein The movable part includes a first connecting arm and a second connecting arm that are connected and intersecting. The first connecting arm is rotatably connected to the second bracket, and the second connecting arm is detachably connected to the second bracket. The second connecting arm includes a protruding latch, and the second bracket has a latch groove that matches the shape of the latch.

6. The spray head unit according to claim 5, characterized in that, The second bracket includes a first extending portion and a second extending portion that are spaced apart, the first connecting arm is rotatably connected to the first extending portion, the second connecting arm is detachably connected to the second extending portion, the card slot is provided on the side of the second extending portion away from the first extending portion, the card slot is recessed toward the side where the first extending portion is located, and the card protrusion is provided on the side of the second connecting arm facing the first extending portion.

7. The spray head unit according to claim 5, wherein The second bracket includes a first extending portion, the first extending portion is provided with a rotation groove, the first connecting arm includes a first end portion, the first end portion is accommodated in the rotation groove, the first end portion and the first extending portion are connected by a pin, and the first end portion is constructed to be rotatable in the rotation groove with the pin as an axis.

8. The spray head unit according to claim 5, characterized in that, The second bracket includes a second extension portion, the second extension portion includes a supporting step, the supporting step is used to support the first connecting arm, the first connecting arm is provided with a first assembly hole, the second extension portion is provided with a second assembly hole, the first assembly hole and the second assembly hole are constructed to be arranged opposite to each other and connected when the card protrusion is arranged in the card slot.

9. The nozzle unit according to claim 5, characterized in that, The second bracket includes a connecting plate, a first extending portion and a second extending portion, the first extending portion and the second extending portion are spaced apart from each other and are respectively connected to the connecting plate, the first connecting arm is rotatably connected to the first extending portion, and the second connecting arm is detachably connected to the second extending portion, the connecting plate, the first extending portion, the second extending portion and the mounting assembly are combined to form a mounting hole, and the nozzle assembly is arranged through the mounting hole.

10. The nozzle unit according to claim 9, characterized in that, The first protruding portion and the second protruding portion are provided on the same side of the connecting plate away from the first bracket. The first connecting arm is located on the side of the first protruding portion and the second protruding portion away from the connecting plate, and the second connecting arm is located between the first connecting arm and the connecting plate.

11. A 3D printing device, characterized in that, It includes a forming platform, a driving component, and a nozzle unit as described in any one of claims 1 to 10, and the driving component drives the nozzle unit to move relative to the forming platform.

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