Printing head and three-dimensional forming equipment

Abstract

The utility model provides a printing head and three-dimensional forming equipment. The printing head comprises a fixing mechanism which is provided with a channel; the spray head assembly can be inserted into or separated from the channel; the locking mechanism is installed on the fixing mechanism, the locking mechanism comprises a first position and a second position, the locking mechanism extends into the channel to be matched with the spray head assembly at the first position so as to limit relative movement of the spray head assembly and the fixing mechanism, and the locking mechanism is located outside the channel at the second position so as to limit relative movement of the spray head assembly and the fixing mechanism. The limiting of the relative movement of the nozzle assembly and the fixing mechanism is relieved. Therefore, a user can operate the locking mechanism outside the fixing mechanism to achieve quick disassembly and portable assembly of the spray head assembly comprising the nozzle and the fixing mechanism, operation is easy, and disassembly and assembly are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a printing head and three-dimensional molding equipment. Background Art

[0002] In three-dimensional molding equipment, such as FDM (Fused Deposition Modeling) printers, the guide frame drives the print head down to a preset position. The nozzle of the print head selectively sprays material onto the printing platform in a scanning manner according to the cross-sectional shape of the product. After the material cools, the first layer of the printed product is formed. The guide frame then drives the print head up one layer, and the second layer is printed on the basis of the first layer, accumulating layer by layer to achieve three-dimensional printing.

[0003] In current print heads, the nozzle and heat sink of the nozzle assembly are usually connected by bolts to fix the throat and the heat sink. During the long-term use of the equipment, the throat and the nozzle are prone to wear, blockage and other faults, which require frequent maintenance or replacement. In this way, professional tools are required to remove the bolts to separate the nozzle assembly from the heat sink, which makes disassembly difficult and maintenance inconvenient. Utility Model Content

[0004] In view of this, the utility model provides a print head and a three-dimensional forming device, and the user can operate the locking mechanism outside the fixing mechanism to realize the rapid disassembly and portable assembly of the nozzle assembly including the nozzle and the fixing mechanism, which is simple to operate and convenient to disassemble and assemble, and is conducive to improving the maintenance and replacement efficiency of the print head.

[0005] The first aspect of the utility model provides a print head, comprising: a fixing mechanism, the fixing mechanism having a channel; a nozzle assembly, the nozzle assembly can be inserted into or out of the channel; a locking mechanism, the locking mechanism is installed on the fixing mechanism, the locking mechanism includes a first position and a second position, in the first position, the locking mechanism extends into the channel and cooperates with the nozzle assembly to limit the relative movement of the nozzle assembly and the fixing mechanism, and in the second position, the locking mechanism is located outside the channel to release the limitation of the relative movement of the nozzle assembly and the fixing mechanism.

[0006] In an optional embodiment, a positioning portion is provided on the nozzle assembly, and the locking mechanism includes an operating member rotatably arranged relative to the fixing mechanism, and a locking member linked to the operating member, and part of the operating member is located outside the fixing mechanism. In a first position, the locking member extends into the channel and cooperates with the positioning portion. In a second position, the locking member is located outside the channel.

[0007] In an optional embodiment, the locking mechanism also includes a shell connected to the fixing mechanism, the shell is provided with an operating port and a through hole, the operating member includes a connecting portion rotatably connected to the inner wall of the shell, and an operating portion extending to the outside of the fixing mechanism through the operating port, the locking member is connected to the connecting portion, and can extend to the outside of the shell through the through hole to be located in the channel.

[0008] In an optional embodiment, the shell and the connecting portion are rotationally connected via a spiral structure.

[0009] In an optional embodiment, the number of turns of the spiral structure is less than one turn, and the locking mechanism further includes an elastic member connected between the shell and the connecting portion to apply a force of the shell close to the channel side to the connecting portion.

[0010] In an optional embodiment, the number of turns of the spiral structure is greater than or equal to one turn.

[0011] In an optional embodiment, a limiting boss is provided on the peripheral side of the locking member, and a limiting groove with a side opening is provided at the end of the connecting portion close to the through hole, and the limiting boss is accommodated in the limiting groove.

[0012] In an optional embodiment, an escape opening opposite to the through hole is formed at the end of the shell away from the through hole, and the end of the locking member away from the channel is passed through the operating member and is located in the escape opening; wherein, the locking member in the first position is located inside the escape opening, and the locking member in the second position extends to the outside of the escape opening.

[0013] In an optional embodiment, the shell includes a first shell and a second shell that are detachably connected, the adjacent ends of the first shell and the second shell form an operating port, a through hole is provided at the end of the second shell away from the first shell, and the connecting part is rotatably connected to the second shell.

[0014] In an optional embodiment, the print head also includes: a first connecting member, a first connecting hole is provided on at least one of the first shell and the second shell, a second connecting hole is opened on the fixing mechanism, and the first connecting member connects the shell and the fixing mechanism through the first connecting hole and the second connecting hole.

[0015] In an optional embodiment, the nozzle assembly includes a throat, the positioning portion includes a positioning groove arranged on the circumference of the throat; the locking member includes a bayonet, and the end of the bayonet facing the channel is provided with a guide surface matching the positioning groove.

[0016] In an optional embodiment, the positioning groove includes an annular groove.

[0017] In an optional embodiment, the nozzle assembly also includes: a heating block and a nozzle, the heating block is provided with a mounting hole, the other end of the throat is connected to one end of the mounting hole close to the fixing mechanism, and the nozzle is connected to one end of the mounting hole away from the fixing mechanism.

[0018] In an optional embodiment, the fixing mechanism includes a heat sink, and the nozzle assembly includes a throat, which can be inserted into or removed from the channel.

[0019] An embodiment of the second aspect of the utility model provides a three-dimensional molding device, comprising: a guide frame and a print head according to any one of the first aspects, wherein the print head is mounted on the guide frame.

[0020] The print head and three-dimensional forming equipment provided by the embodiments of the utility model include a fixing mechanism, a nozzle assembly and a locking mechanism. The nozzle assembly can be inserted into or detached from the channel of the fixing mechanism. The locking mechanism is installed on the fixing mechanism. When the locking mechanism is in a first position, the locking mechanism can extend into the channel and cooperate with the nozzle assembly to limit the relative movement of the fixing mechanism and the nozzle assembly, thereby achieving a fixed connection between the nozzle assembly and the fixing mechanism. When the locking mechanism is in a second position, the locking mechanism is located outside the channel to release the limit of the relative movement of the nozzle assembly and the fixing mechanism to achieve separation of the nozzle assembly from the fixing mechanism. Therefore, by operating the locking mechanism outside the fixing mechanism, the locking mechanism can be switched between the first position and the second position, thereby realizing the disassembly and assembly of the nozzle assembly including the nozzle and the fixing mechanism. Compared with the related art in which the heating block and the heat dissipation block are connected by bolts to realize the fixation of the throat and the fixing mechanism, and the bolts need to be tightened with operating tools to realize the disassembly and assembly of the nozzle assembly and the fixing mechanism, the present embodiment can realize the rapid disassembly and portable assembly of the nozzle assembly including the nozzle and the fixing mechanism by manually operating the locking mechanism without operating tools. The operation is simple and the disassembly and assembly are convenient, which is conducive to improving the efficiency of maintenance and replacement of parts and is suitable for popularization and application.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those skilled in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only used for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used throughout the accompanying drawings to represent the same components. Among them:

[0023] Figure 1 An exploded schematic diagram of a print head of the utility model is shown;

[0024] Figure 2 An exploded schematic diagram of the locking mechanism of the utility model is shown;

[0025] Figure 3A structural schematic diagram showing a view of the nozzle assembly and the fixing mechanism of the utility model in a separated state and the locking mechanism in an unlocked state;

[0026] Figure 4 A structural schematic diagram showing a view of the nozzle assembly and the fixing mechanism of the utility model in an inserted state and the locking mechanism in a second position;

[0027] Figure 5 A structural schematic diagram showing a view of the nozzle assembly and the fixing mechanism of the utility model in an inserted state and a locking mechanism in a first position;

[0028] Figure 6 Shows Figure 4 a cross-sectional view of one perspective of the illustrated embodiment;

[0029] Figure 7 Shows Figure 5 A cross-sectional view from one perspective of the illustrated embodiment.

[0030] in, Figures 1 to 7 The corresponding relationship between the reference numerals and the component names is as follows:

[0031] 100 print head, 110 fixing mechanism, 111 channel, 112 mounting groove, 113 through hole, 114 second connecting hole, 120 nozzle assembly, 121 throat, 1211 positioning portion, 122 nozzle, 123 heating block, 130 locking mechanism, 131 operating member, 1311 connecting portion, 1312 operating portion, limiting groove, 132 locking member, 1321 limiting boss, 1322 guide surface, 133 shell, 1331 operating port, 1332 through hole, 1333 avoidance port, 1334 first shell, 1335 second shell, 1336 first connecting hole, 134 elastic member, 135 second connecting member, 140 first connecting member. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0033] Refer to the following Figures 1 to 7 The print head 100 and the stereoscopic molding device provided according to some embodiments of the present invention are described. The stereoscopic molding device may be a fused deposition type printer, inkjet printer, etc. Specifically, the stereoscopic molding device may be an FDM printer, wherein the print head 100 may be applied to the stereoscopic molding device.

[0034] like Figure 1 , Figure 2, Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, an embodiment of the first aspect of the utility model provides a print head 100, including: a fixing mechanism 110, the fixing mechanism 110 is provided with a channel 111; a nozzle assembly 120, the nozzle assembly 120 can be inserted into or detached from the channel 111; a locking mechanism 130, the locking mechanism 130 is installed on the fixing mechanism 110, and the locking mechanism 130 includes a first position and a second position. In the first position, the locking mechanism 130 extends into the channel 111 and cooperates with the nozzle assembly 120 to limit the relative movement between the nozzle assembly 120 and the fixing mechanism 110. In the second position, the locking mechanism 130 is located outside the channel 111 to release the limitation of the relative movement between the nozzle assembly 120 and the fixing mechanism 110.

[0035] The fixing mechanism 110 and the nozzle assembly 120 can be understood as being detachably connected through the locking mechanism 130. For the print head 100 of the stereolithography device, the fixing mechanism 110 can be a heat sink, and the nozzle assembly 120 can include a throat 121, a heating block 123, a nozzle 122, etc. Thus, the heat sink and the nozzle assembly 120 including the throat 121, the heating block 123, and the nozzle 122 can be detachably connected through the locking mechanism 130. Alternatively, the fixing mechanism 110 can be understood as other fixing mechanisms, such as a mounting block, etc., and the nozzle assembly 120 can include a heat sink, a throat 121, a heating block 123, a nozzle 122, etc., and the locking mechanism 130 can be detachably connected between the mounting block and the heat sink.

[0036] It is understandable that in the embodiment of the present invention, it is not limited whether the fixing mechanism 110 includes a heat sink or a mounting block, as long as the nozzle 122 can be quickly disassembled. The present invention will be described later by taking the nozzle assembly in which the fixing mechanism 110 includes a heat sink, and the nozzle assembly 120 includes a throat 121, a heating block 123, and a nozzle 122 as an example, but this is not limited to this.

[0037] In an optional embodiment, the channel 111 may include a first mounting hole, that is, the channel 111 may be formed by a first mounting hole. In another optional embodiment, the channel 111 may include a feed channel for consumables on the print head. It is understandable that the locking mechanism 130 is installed on the fixing mechanism 110, and the fixing mechanism 110 may also be provided with a mounting groove 112 for installing the locking mechanism 130, and the mounting groove 112 is connected to the channel 111, and the mounting groove 112 may be formed by a second mounting hole. In the present application, the first mounting hole and the second mounting hole are not limited to through holes or blind holes. It is understandable that the channel 111 and the mounting groove 112 can be arranged on the same straight line, or the channel 111 and the mounting groove 112 can be arranged vertically or obliquely to meet the requirements of different structures of the switching mechanism 130.

[0038] Among them, the nozzle assembly 120 may be provided with a positioning portion 1211 that can be located in the channel 111. In the first position, part of the locking mechanism 130 extends into the channel 111 and cooperates with the positioning portion 1211 to limit the relative movement of the nozzle assembly 120 and the fixing mechanism 110, such as part of the locking mechanism 130 abuts against the positioning portion 1211 to clamp part of the nozzle assembly 120, thereby achieving relative fixation of the nozzle assembly 120 and the fixing mechanism 110. It can be understood that the positioning portion 1211 may not be provided on the nozzle assembly 120, and the nozzle assembly 120 can be fixed when the locking mechanism 130 has sufficient force against the nozzle assembly 120.

[0039] The locking mechanism 130 includes a first position and a second position. It can be understood that the user can switch the first position and the second position of the locking mechanism 130 by operating the locking mechanism 130 with bare hands. The locking mechanism 130 is installed on the fixing mechanism 110. Specifically, the locking mechanism 130 is installed at the mounting groove 112 of the fixing mechanism 110. A part of the locking mechanism 130 can be located in the mounting groove 112, and another part of the locking mechanism 130 can be located outside the mounting groove 112, such as another part of the locking mechanism 130 is exposed to the outside of the fixing mechanism 110. Therefore, the user can operate the locking mechanism 130 with bare hands outside the fixing mechanism 110 to switch the first position and the second position of the locking mechanism 130. The operation is simple and convenient to use. Alternatively, the entire locking mechanism 130 is located in the installation groove 112, and the installation groove 112 is connected to the external environment. The user's fingers or tools are inserted into the installation groove 112 to operate the locking structure 130, thereby realizing the switching of the locking mechanism 130 between the first position and the second position, thereby realizing the installation and disassembly operations of the nozzle assembly 120 and the fixing mechanism 110, and realizing the rapid disassembly of the nozzle assembly 120 or the fixing mechanism 110 including the nozzle 122.

[0040] The print head 100 provided by the embodiment of the utility model comprises a fixing mechanism 110, a nozzle assembly 120 and a locking mechanism 130, wherein the fixing mechanism 110 is provided with a channel 111, and the nozzle assembly 120 can be inserted into or detached from the channel 111, that is, the nozzle assembly 120 can move relative to the channel 111, so that the nozzle assembly 120 can be detachably connected with the fixing mechanism 110 through the channel 111 on the fixing mechanism 110. The locking mechanism 130 is located on the fixing mechanism 110, and when the locking mechanism 130 is in the first position, the locking mechanism 130 can extend into the channel 111 to cooperate with the positioning portion 1211 on the nozzle assembly 120 to limit the relative movement of the nozzle assembly 120 and the fixing mechanism 110, so as to lock the relative movement of the nozzle assembly 120 and the fixing mechanism 110, thereby realizing the fixed connection between the nozzle assembly 120 and the fixing mechanism 110. When the locking mechanism 130 is in the second position, the locking mechanism 130 is located outside the channel 111, that is, the locking mechanism 130 is separated from the positioning portion 1211 located in the channel 111, so as to release the limitation of the relative movement of the nozzle assembly 120 and the fixing mechanism 110, so that the nozzle assembly 120 can be separated from the channel 111, thereby realizing the separation of the nozzle assembly 120 and the fixing mechanism 110, thereby realizing the rapid disassembly of the nozzle assembly 120 or the fixing mechanism 110 including the nozzle 122.

[0041] It can be understood that when the locking mechanism 130 is in the second position, the nozzle assembly 120 can be inserted into the channel 111, and the position of the nozzle assembly 120 in the channel 111 can be adjusted so that the positioning portion 1211 on the nozzle assembly 120 is opposite to the locking mechanism 130, so that when the locking mechanism 130 is switched to the first position, the locking mechanism 130 can smoothly and accurately extend into the channel 111 and cooperate with the positioning portion 1211 to achieve a quick connection between the nozzle assembly 120 and the fixing mechanism 110.

[0042] That is to say, with the print head 100 provided in the embodiment of the utility model, the user can switch the locking mechanism 130 between the first position and the second position by operating the locking mechanism 130, thereby realizing the installation and disassembly operations of the nozzle assembly 120 and the fixing mechanism 110, that is, realizing the rapid disassembly of the nozzle assembly 120 or the fixing mechanism 110 including the nozzle 122. Compared with the related art in which the heating block and the heat sink block are connected by bolts to realize the fixation of the throat and the heat sink, and the bolts need to be tightened by operating tools to realize the disassembly and assembly of the nozzle assembly and the heat sink, with the print head 100 provided in the present embodiment, the user can operate the locking mechanism 130 by hand without operating tools to realize the rapid disassembly and portable assembly of the nozzle assembly 120 and the fixing mechanism 110, which is simple to operate and convenient to disassemble and assemble, which is conducive to improving the efficiency of maintenance and replacement of parts, and is suitable for popularization and application.

[0043] like Figure 1 , Figure 2, Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in some possible embodiments provided by the utility model, a positioning portion 1211 is provided on the nozzle assembly 120, and the locking mechanism 130 includes an operating member 131 rotatably arranged relative to the fixing mechanism 110, and a locking member 132 linked to the operating member 131, and part of the operating member 131 is located outside the fixing mechanism 110. In the first position, the locking member 132 extends into the channel 111 and cooperates with the positioning portion 1211. In the second position, the locking member 132 is located outside the channel 111.

[0044] Among them, the operating member 131 can be rotated relative to the fixing mechanism 110. It can be understood that the user can operate the operating member 131 by hand to realize the rotation of the operating member 131 relative to the fixing mechanism 110. Since the locking member 132 is linked with the operating member 131, and when the locking mechanism 130 is in the first position, the locking member 132 can extend into the channel 111 and cooperate with the positioning portion 1211. When the locking mechanism is in the second position, the locking member is located outside the channel 111. Therefore, it can be understood that the user can operate the operating member 131 by hand to drive the locking member 132 to extend into the channel 111 or exit the channel 111, thereby enabling the locking mechanism 130 to switch between the first position and the second position.

[0045] In this embodiment, when the locking mechanism 130 is in the first position, it can be understood that the user rotates the operating member 131 to drive the locking member 132 to move so that the locking member 132 extends into the channel 111, and the locking member 132 cooperates with the positioning portion 1211 on the nozzle assembly 120 in the channel 111, and can limit the relative movement of the nozzle assembly 120 and the fixing mechanism 110, so as to lock the nozzle assembly 120 and the fixing mechanism 110 with each other, thereby realizing the relative fixation of the nozzle assembly 120 and the fixing mechanism 110, and further realizing the fixed connection between the nozzle assembly including the nozzle 122 and the heat sink.

[0046] When the locking mechanism 130 switches to the second position, it can be understood that the user manually rotates the operating member 131 so that the locking member 132 is located outside the channel 111, that is, the locking member 132 exits the channel 111. In this state, the locking member 132 is disengaged from the positioning portion 1211, and the limiting effect between the locking member 132 and the positioning portion 1211 is released, so that the nozzle assembly 120 can be disengaged from the channel 111, thereby realizing the separation of the nozzle assembly and the fixing mechanism 110, and further realizing the rapid disassembly of the nozzle assembly including the nozzle 122 and the fixing mechanism 110.

[0047] Part of the operating member 131 is arranged outside the mounting groove 112, that is, part of the operating member 131 is located outside the fixing mechanism 110, and the operating member 131 can be rotated relative to the fixing mechanism 110 by hand operation. Therefore, by rotating the operating member 131 by hand outside the fixing mechanism 110, the locking member 132 can be driven to extend into the channel 111 or withdraw from the channel 111, thereby realizing the switching of the locking mechanism 130 between the first position and the second position, so as to realize the fixed connection and disassembly separation of the nozzle assembly 120 and the fixing mechanism 110, thereby realizing The quick disassembly and assembly of the nozzle assembly including the nozzle 122 and the heat sink block is compared with the related art in which the heating block and the heat sink are connected by bolts to achieve a fixed connection between the throat and the heat sink, and the bolts require special operating tools to screw to achieve the disassembly and assembly of the heating block and the heat sink. In the print head provided in this embodiment, the user can operate the operating part 131 on the outside of the fixing mechanism 110 by hand without any operating tools to achieve quick disassembly and portable assembly of the nozzle assembly 120 and the fixing mechanism 110. The operation is simple and the disassembly and assembly are convenient, which is conducive to improving the efficiency of maintenance and replacement of parts and is suitable for popularization and application.

[0048] In an optional embodiment, the related art usually uses two bolts to connect the heating block and the heat sink on both sides of the throat, so during the disassembly process, it is necessary to use special operations to screw the two bolts. In the print head 100 provided by the embodiment of the utility model, the fixing mechanism 110 can be a heat sink, and the nozzle assembly 120 can include a throat 121, and the throat 121 can be connected to the nozzle 122 through the heating block 123. The positioning part 1211 is set on the throat 121. By manually rotating a part of the operating member 131 outside the heat sink, the throat 121 and the heat sink can be quickly assembled and disassembled, and then the nozzle assembly including the nozzle 122 and the heat sink can be quickly assembled and disassembled, which simplifies the operation steps and is conducive to improving the efficiency of maintenance and replacement. At the same time, the rotation operation of the operating member 131 is realized on the outside of the heat dissipation block, so that the operating space of the operating member 131 is larger, which is beneficial to further improve the disassembly and assembly efficiency of the nozzle assembly 120 and the fixing mechanism 110. At the same time, it is convenient for users to operate with bare hands, reduces the restriction conditions of the disassembly and assembly operation of the print head 100, and increases the versatility of the disassembly and assembly operation.

[0049] Among them, because under normal circumstances, the bottom of the fixing mechanism 110 is used to connect the nozzle assembly 120, such as the throat 121 used to connect the nozzle assembly 120, and the top of the fixing mechanism 110 is used to connect the material pipe of the feeding mechanism of the three-dimensional molding equipment, therefore, the channel 111 can pass through the bottom and top of the fixing mechanism 110, and the installation groove 112 for installing the locking mechanism 130 can be opened on the side of the fixing mechanism 110, that is, the opening of the channel 111 can be located at the bottom and top of the fixing mechanism 110, and the opening of the installation groove 112 can be located at the side of the fixing mechanism 110. In an optional embodiment, the channel 111 and the installation groove 112 can be connected through the through hole 113, that is, the locking member 132 can extend from the installation groove 112 to the channel 111 through the through hole 113, and can move from the channel 111 to the installation groove 112 through the through hole 113, so as to realize the switching of the locking mechanism 130 between the first position and the second position. Among them, the length direction of the fixing mechanism channel 111 can be as shown in FIG. Figure 1 , Figure 6 and Figure 7 In the arrow Z direction, the length direction of the mounting groove 112 can be understood as the left-right direction or the front-back direction of the fixing mechanism 110. Figure 1 As shown by the arrow X in FIG.

[0050] Specifically, Figure 3 As shown, when the separated fixing mechanism 110 and the nozzle assembly 120 need to be assembled and fixed, the operating part 1312 located outside the fixing mechanism 110 can be manually rotated to put the locking mechanism 130 in the second position, the locking member 132 withdraws from the channel 111, and the upper end of the throat 121 of the nozzle assembly 120 is inserted from the bottom of the fixing mechanism 110 into the appropriate position of the channel 111, as shown in FIG. Figure 4 and Figure 6 As shown, the positioning portion 1211 is aligned with the through hole 113. Figure 5 and Figure 7 As shown, the operating member 131 located outside the fixing mechanism 110 is manually rotated to switch the locking mechanism 130 to the first position, and the locking member 132 moves through the through hole 113 into the channel 111 to cooperate with the positioning portion 1211 of the nozzle assembly 120, so that the nozzle assembly 120 and the fixing mechanism 110 can be restricted so that the nozzle assembly 120 does not move downward along the channel 111 and detach from the channel 111, thereby realizing the installation of the nozzle assembly 120 and the fixing mechanism 110.

[0051] On the contrary, when it is necessary to disassemble and separate the nozzle assembly 120 from the fixing mechanism 110, the locking mechanism 130 can be switched to the second position by manually rotating the operating member 131 located outside the fixing mechanism 110. Figure 4 and Figure 6As shown, the locking member 132 moves to the outside of the channel 111 and separates from the positioning portion 1211 in the channel 111. Then, the nozzle assembly 120 is moved downward to disengage the nozzle assembly from the channel 111, thereby achieving disassembly and separation of the nozzle assembly 120 from the fixing mechanism 110. The operation is simple and easy to use.

[0052] The operating member 131 and the locking member 132 are arranged in linkage, so that the operating member 131 is rotated relative to the fixing mechanism 110 to drive the locking member 132 to extend into the channel 111 or to exit the channel 111, so as to switch the locking mechanism 130 between the first position and the second position. Specifically, the operating member 131 and the locking member 132 can be directly connected to realize the linkage setting; or, the operating member 131 and the locking member 132 can be indirectly connected through other structures to realize the linkage setting.

[0053] It is understandable that if Figure 4 and Figure 5 As shown, the operating member 131 can rotate relative to the fixing mechanism 110 in a clockwise direction or in a counterclockwise direction, thereby enabling the locking member 132 connected to the operating member 131 to switch between the first position and the second position.

[0054] In an optional embodiment, the locking mechanism 130 and the fixing mechanism 110 can be detachably connected. For example, the locking mechanism 130 and the fixing mechanism 110 can be detachably connected by at least one of a bolt structure, a plug-in structure, a snap-on structure, a mortise and tenon structure, and a magnetic structure. In this way, the locking mechanism 130 can be removed from the fixing mechanism 110 for repair and replacement, which is beneficial to improving the efficiency of repair and replacement of the locking mechanism 130.

[0055] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, in some possible embodiments provided by the present invention, the locking mechanism 130 also includes a shell 133 connected to the fixing mechanism 110, the shell 133 is provided with an operating port 1331 and a through hole 1332, the operating member 131 includes a connecting portion 1311 rotatably connected to the inner wall of the shell 133, and an operating portion 1312 extending to the outside of the fixing mechanism 110 through the operating port 1331, the locking member 132 is connected to the connecting portion 1311, and can extend to the outside of the shell 133 through the through hole 1332 to be located in the channel 111.

[0056] That is to say, the connecting portion 1311 of the operating member 131 is located inside the shell 133 and is rotatably connected to the inner wall of the shell 133. The operating portion 1312 of the operating member 131 extends to the outside of the fixing mechanism 110 through the mounting groove 112. It can be understood that the operating portion 1312 can be operated by the user without using tools, that is, the user can operate the operating portion 1312 by hand to rotate the operating portion 1312 relative to the shell 133. Therefore, by manually rotating the operating part 1312 outside the fixing mechanism 110, the connecting part 1311 can be driven to rotate relative to the shell 133. Since the locking piece 132 is connected to the connecting part 1311 and can extend to the outside of the shell 133 through the through hole 1332, the locking piece 132 can be driven to extend into the channel 111, or move from being located in the channel 111 to exiting the channel 111, so that the locking mechanism 130 switches between the first position and the second position to realize the disassembly and assembly of the nozzle assembly 120 and the fixing mechanism 110. It has a simple structure and is easy to operate. Compared with the related technology that requires the use of operating tools to screw bolts to realize the disassembly and assembly of the nozzle assembly and the heat sink, it simplifies the use of operating tools and expands the scope of use.

[0057] In some possible embodiments provided by the present invention, the shell 133 and the connecting part 1311 are rotatably connected through a spiral structure, thereby enabling the rotating operating part 1312 to enable the connecting part 1311 to move relative to the shell 133. For example, rotating the operating part 1312 with the direction from the channel 111 to the mounting groove 112 as the axis can enable the connecting part 1311 to move relative to the shell 133 along the direction from the channel 111 to the mounting groove 112, thereby driving the locking member 132 to move relative to the shell 133 along the direction from the channel 111 to the mounting groove 112 to switch between the first position and the second position. That is, the setting of the spiral structure enables the operating part 1312 to rotate with the direction from the channel 111 to the mounting groove 112 as the axis, converting the movement of the locking member 132 along the direction from the channel 111 to the mounting groove 112, thereby realizing the quick disassembly and assembly operation of the nozzle assembly 120 and the fixing mechanism 110, with a simple structure and convenient operation.

[0058] In an optional embodiment, the spiral structure may include a spiral convex portion and a spiral concave portion that cooperate with each other, one of the convex portion and the concave portion is arranged on the outer wall of the connecting portion 1311, and the other is arranged on the inner wall of the housing 133, thereby, through the coupling of the spiral convex portion and the concave portion, when the operating portion 1312 rotates relative to the housing 133, the connecting portion 1311 can be moved relative to the housing 133. Among them, the spiral convex portion and the concave portion are convenient to process, easy to realize, and have low processing cost.

[0059] The spiral structure may be a thread structure, for example, the inner wall of the housing 133 is provided with an internal thread structure, and the outer wall of the connecting portion 1311 is provided with an external thread structure.

[0060] In some possible embodiments provided by the present invention, the number of turns of the spiral structure is less than one turn, that is, the axial distance of the spiral structure is less than the pitch, so that the connecting portion 1311 of the operating member 131 rotates less than one turn along the spiral structure relative to the shell 133, that is, the user rotates the operating portion 1312 less than one turn by hand, and the locking member 132 can be driven by the connecting portion 1311 to extend into the channel 111 or exit the channel 111, so that the locking mechanism 130 switches between the first position and the second position, thereby realizing the quick disassembly and assembly operation of the nozzle assembly 120 and the fixing mechanism 110, which greatly simplifies the operating steps, makes the operation simple and convenient, and can further improve the disassembly and assembly efficiency of the nozzle assembly 120 and the fixing mechanism 110.

[0061] It is understandable that the pitch of the spiral structure can be reasonably set so that the number of turns of the spiral structure is less than one turn, which can drive the locking member 132 to switch between the first position and the second position during the rotation of the connecting portion 1311 relative to the housing 133.

[0062] Specifically, the number of turns of the spiral structure may be between 0.1 turns and 1 turn, such as 0.1 turns, 0.5 turns, 0.6 turns, 0.75 turns, 0.8 turns, 0.99 turns, or other numbers of turns.

[0063] For example, when the number of turns of the spiral structure is equal to or greater than 0.5 turns, the pitch of the spiral structure can be reasonably set so that the operating portion 1312 rotates 90°, thereby realizing the switching of the locking mechanism 130 between the first position and the second position. Figure 3 , Figure 4 and Figure 6 As shown, the locking mechanism 130 is in the second position, that is, the locking member 132 is out of the channel 111, and the operating portion 1312 can be in the initial position. Figure 5 and Figure 7 As shown, the locking mechanism 130 is in the first position, that is, the locking piece 132 extends into the channel 111, and the operating part 1312 can be in the locking position at this time. The rotation angle between the operating part 1312 in the locking position and the operating part 1312 in the initial position is 90°, that is, the operating part 1312 can be switched to the locking position by rotating 90° clockwise from the initial position, and the operating part 1312 can be switched to the initial position by rotating 90° counterclockwise from the locking position, thereby enabling the nozzle assembly 120 and the fixing mechanism 110 to be disassembled and assembled, and the operation is simple and convenient.

[0064] In an optional embodiment, the locking mechanism 130 further includes an elastic member 134, which is connected between the housing 133 and the connecting portion 1311 to apply a force of the housing 133 close to the channel 111 side to the connecting portion 1311. The setting of the elastic member 134 enables the connecting portion 1311 to have a movement tendency close to the channel 111, thereby enabling the spiral recess and the spiral protrusion to fit closely on the side close to the channel 111 to ensure the reliability and stability of the relative movement of the spiral structure. Alternatively, when the spiral recess and the spiral protrusion are separated, the connecting portion 1311 can be abutted against the side of the housing 133 close to the channel 111 under the action of the elastic member 134, so that the reverse operation operating portion 1312 can smoothly couple the spiral recess and the spiral protrusion to ensure the reliability and stability of the relative movement of the spiral structure, so that the locking member 132 can reliably and accurately switch between the first position and the second position.

[0065] Specifically, if the operating part 1312 is rotated clockwise, the spiral recess and the spiral protrusion are separated after the operating part 1312 moves from the initial position to the locking position, that is, after the locking mechanism 130 is switched from the second position to the first position, due to the setting of the elastic member 134, the connecting part 1311 can be abutted against the side of the shell 133 close to the channel 111 under the action of the elastic member 134, so as to prevent the connecting part 1311 from loosening, so that the locking member 132 can be reliably maintained in the first position, and then cooperate with the positioning part 1211 to reliably define the nozzle assembly 120 and the fixing mechanism 110, so that the nozzle assembly 120 can be fixed on the fixing mechanism 110. When it is necessary to separate the nozzle assembly 120 from the fixing mechanism 110, the operating portion 1312 is rotated by hand and the force of the elastic member 134 is overcome to rotate the operating portion 1312 from the locking position to the initial position. That is, during the switching process of the locking mechanism 130 from the first position to the second position, the spiral concave portion and the spiral convex portion can be smoothly coupled due to the force of the elastic member 134, thereby reducing the occurrence of the phenomenon that the spiral concave portion and the spiral convex portion cannot be coupled. The user does not need to overcome the force of the elastic member 134. The user can rotate the operating portion 1312 to the initial position under a small force, so that the locking member 132 moves to the through hole outside the channel 111 and disengages from the positioning portion 1211 of the throat 121, thereby realizing the switching of the locking mechanism 130 from the first position to the second position. Then, the nozzle assembly 120 can be moved to disengage the nozzle assembly 120 from the channel 111, thereby realizing the disassembly of the nozzle assembly 120 and the fixing mechanism 110. The operation is simple and easy to use.

[0066] In an optional embodiment, the elastic member 134 may be a spring, a spring sheet, or other elastic structures.

[0067] In some possible embodiments provided by the present invention, the number of turns of the spiral structure is greater than or equal to one turn, which can also be understood as that the axial distance of the spiral structure is greater than or equal to the pitch.

[0068] That is, by rotating the operating portion 1312 one circle or more than one circle, the locking mechanism 130 can be switched between the first position and the second position, and the operation is simple. It is understandable that the pitch of the spiral structure can be reasonably set so that the number of turns of the spiral structure is equal to one circle, so that the locking member 132 can be driven to extend into the channel 111 or exit the channel 111 during the rotation of the connecting portion 1311 relative to the housing 133, so as to switch the locking mechanism 130 between the first position and the second position.

[0069] In this embodiment, since the number of turns of the threaded structure is greater than or equal to one turn, the pitch can be reasonably set so that when the operating part 1312 rotates between the initial position or the locking position, that is, when the locking mechanism 130 switches between the second position and the first position, the spiral recess and the spiral protrusion are coupled, that is, the spiral recess and the spiral protrusion will not be separated. Therefore, the setting of the elastic member 134 can be simplified, which is conducive to simplifying the components of the locking mechanism 130 and reducing the manufacturing cost of the locking mechanism 130.

[0070] It is understandable that, when the number of revolutions of the threaded structure is less than one turn, the pitch can be reasonably set so that the spiral concave portion and the spiral convex portion are coupled during the switching process of the locking mechanism 130 between the first position and the second position, that is, the spiral concave portion and the spiral convex portion will not be separated, thereby simplifying the setting of the elastic member 134. For example, the number of revolutions of the threaded structure can be 0.75 turns, and the rotation angle between the operating portion 1312 in the locking position and the operating portion 1312 in the initial position is 90°, so that when the operating portion 1312 is in the initial position and the locking position, the spiral convex portion and the concave portion can be coupled, and in this case, the setting of the elastic member 134 can also be simplified.

[0071] like Figure 1 , Figure 2 , Figure 6 and Figure 7As shown, in some possible embodiments provided by the present invention, a limiting boss 1321 is provided on the circumferential side of the locking member 132, and a laterally opening limiting groove is provided at the end of the connecting portion 1311 close to the through hole 1332, and the limiting boss 1321 is accommodated in the limiting groove. Thus, the limiting boss 1321 and the limiting groove can be used to limit the movement of the locking member 132 relative to the connecting portion 1311 in the direction from the channel 111 to the mounting groove 112, so that the connecting portion 1311 moves relative to the shell 133 in the direction from the channel 111 to the mounting groove 112, and can drive the locking member 132 to move synchronously relative to the shell 133 in the direction from the channel 111 to the mounting groove 112, thereby enabling the locking member 132 to switch between the first position and the second position. Specifically, the direction from the channel 111 to the mounting groove 112 can be as follows: Figure 1 , Figure 6 and Figure 7 As shown by the arrow X in FIG.

[0072] The limiting groove is provided with an opening on the side thereof, so that the limiting boss 1321 of the locking member 132 can be smoothly accommodated in the limiting groove through the opening. It is understandable that the portion of the locking member 132 facing the channel 111 can be arranged in the through hole 1332, so that during the switching process between the first position and the second position of the locking member 132, the end of the locking member 132 facing the channel 111 can extend into the installation groove 112 through the through hole 1332, or retract from the installation groove 112 into the through hole 1332.

[0073] It can be understood that the end of the locking member 132 away from the channel 111 can be passed through the connecting portion 1311 and extend to the interior of the connecting portion 1311, or the end of the locking member 132 away from the channel 111 can be located in the limiting groove, or the end of the locking member 132 away from the channel 111 can be passed through the operating member 131 and extend to the interior or exterior of the shell 133.

[0074] like Figure 6 and Figure 7As shown, in some possible embodiments provided by the present invention, the end of the housing 133 away from the through hole 1332 is provided with an escape opening 1333 opposite to the through hole 1332, and the end of the locking member 132 away from the channel 111 is penetrated by the operating member 131 and is located in the escape opening 1333, wherein the locking member 132 in the first position is located inside the escape opening 1333, and the locking member 132 in the second position extends to the outside of the escape opening 1333. Thus, the user can judge whether the locking member 132 is in the second position by observing whether the locking member 132 extends to the outside of the escape opening 1333, and further judge whether the locking member 132 is in the first position and the second position, and timely and accurately adjust the position of the locking member 132 through the operating member 131, so as to realize the rapid disassembly and assembly of the nozzle assembly 120 and the fixing mechanism 110, and improve the disassembly and assembly efficiency of the nozzle assembly 120 and the fixing mechanism 110. At the same time, the steps of the user being unable to intuitively determine the current position of the locking member 132 and needing to perform a trial operation to determine the position of the locking member 132 are simplified, which is beneficial to improving the efficiency of disassembling and assembling the print head 100. At the same time, the problem of the user being unable to intuitively determine the current position of the locking member 132 and causing the locking member 132 and the throat 121 to collide and be damaged can be avoided, which is beneficial to improving the reliability of the locking member 132 and the throat 121, and further improving the reliability of the print head 100.

[0075] like Figure 2 , Figure 6 and Figure 7 As shown, in some possible embodiments provided by the present invention, the shell 133 includes a first shell 1334 and a second shell 1335 that are detachably connected, and the adjacent ends of the first shell 1334 and the second shell 1335 are combined to form an operating port 1331, and a through hole 1332 is provided at the end of the second shell 1335 away from the first shell 1334, and the connecting portion 1311 is rotatably connected to the second shell 1335.

[0076] In this embodiment, by configuring the shell 133 to be a detachably connected first shell 1334 and a second shell 1335 , the installation and disassembly of the locking member 132 , the operating member 131 , and the elastic member 134 are facilitated, thereby facilitating the maintenance and replacement efficiency of the locking mechanism 130 .

[0077] In an optional embodiment, the first shell 1334 and the second shell 1335 can be detachably connected by at least one of a bolt structure, a snap-fit ​​structure, a plug-in structure, and a mortise and tenon structure.

[0078] Specifically, the locking mechanism 130 also includes a second connecting member 135. For example, the second connecting member 135 is a bolt. The bolt passes through the holes on the first shell 1334 and the second shell 1335 to reliably connect the first shell 1334 and the second shell 1335. The operation is simple and the disassembly and assembly are convenient.

[0079] Among them, the adjacent ends of the first shell 1334 and the second shell 1335 are combined to form an operating port 1331. The first shell 1334 may be provided with a notch, and the notch cooperates with the second shell 1335 to form the operating port 1331; or the second shell 1335 may be provided with a notch, and the notch cooperates with the first shell 1334 to form the operating port 1331; or both the adjacent ends of the first shell 1334 and the second shell 1335 are provided with notches, so that after the first shell 1334 and the second shell 1335 are connected, the two notches are combined to form the operating port 1331, thereby meeting the requirements of the different structures of the first shell 1334 and the second shell 1335.

[0080] The end of the second shell 1335 away from the first shell 1334 is provided with a through hole 1332 . When the shell 133 is provided with an escape opening 1333 , the escape opening 1333 may be provided on the first shell 1334 .

[0081] like Figure 1 As shown, in some possible embodiments provided by the present invention, the print head 100 also includes: a first connecting member 140, a first connecting hole 1336 is provided on at least one of the first shell 1334 and the second shell 1335, and a second connecting hole 114 is provided on the fixing mechanism 110. The first connecting member 140 connects the shell 133 and the fixing mechanism 110 through the first connecting hole 1336 and the second connecting hole 114, thereby realizing the connection between the shell 133 and the fixing mechanism 110, and then realizing the connection between the locking mechanism 130 and the fixing mechanism 110, which is simple to operate.

[0082] Among them, the first connection hole 1336 can be set on one of the first shell 1334 and the second shell 1335, and the first connection member 140 connects one of the first shell 1334 and the second shell 1335 to the fixing mechanism 110 through the first connection hole 1336, so as to realize the connection between the entire locking mechanism 130 and the fixing mechanism 110. Alternatively, the first connection hole 1336 can be set on both the first shell 1334 and the second shell 1335, and the first connection member 140 connects the first shell 1334 and the second shell 1335 to the fixing mechanism 110 through the first connection hole 1336, so as to realize the connection between the entire locking structure and the fixing mechanism 110.

[0083] In an optional embodiment, the first connecting member 140 is a bolt, thereby achieving a detachable connection between the locking mechanism 130 and the fixing mechanism 110, facilitating disassembly and assembly. The locking mechanism 130 can be removed from the fixing mechanism 110 for repair and replacement, which is beneficial to improving the efficiency of repair and replacement of the locking mechanism 130.

[0084] In some possible embodiments provided by the present invention, the nozzle assembly 120 includes a throat 121, and the positioning portion 1211 includes a positioning groove arranged on the side of the throat 121. The positioning groove has a simple structure, is convenient to process, is easy to implement, and has a low processing cost.

[0085] The locking member 132 comprises a bayonet, which has a simple structure, is convenient to process, is easy to implement, and has a low processing cost.

[0086] In an optional embodiment, a guide surface 1322 matching the positioning groove is provided at the end of the bayonet facing the channel 111, so that when the bayonet moves from the second position to the first position, the end of the bayonet with the guide surface 1322 can smoothly enter the positioning groove under the cooperation of the guide surface 1322 and the positioning groove, so as to play a good limiting role on the throat 121, so that the throat 121 can be reliably and stably fixed on the fixing mechanism 110 and will not be separated from the channel 111. Specifically, the guide surface 1322 can be inclined to the central axis of the bayonet, so that the end of the bayonet opposite to the positioning groove is conical or arc-shaped, that is, the end of the bayonet can be a cone, or can be a spherical or arc-shaped surface.

[0087] In an optional embodiment, the positioning groove includes an annular groove, such as the positioning groove is arranged around the entire circumference of the throat 121. It is understandable that in other examples, the positioning groove is arranged on part of the circumference of the throat 121, or the positioning groove is a slot corresponding to the locking member 132 arranged on the throat 121. The larger the circumferential area of ​​the positioning groove in the throat 121, the lower the alignment accuracy requirement of the positioning portion 1211 and the locking member 132 can be. For example, the positioning groove is arranged as an annular groove, so that when the user installs the throat 121, it is not necessary to deliberately align the positions of the positioning portion 1211 and the locking member 132 in the circumferential direction of the throat 121. It is sufficient to align the positioning portion 1211 with the locking member 132 in the axial direction of the throat 121, which is simple and convenient to operate.

[0088] It can be understood that the throat 121 is fixed to the fixing mechanism 110 by cooperating with the locking member 132 and the positioning portion 1211, which can ensure that the throat 121 does not move axially along the channel 111, that is, the throat 121 does not separate from the channel 111 along the Z-axis direction. In some examples, the throat 121 can rotate relative to the channel 111.

[0089] In some possible embodiments provided by the utility model, the nozzle assembly 120 further includes: a heating block 123 and a nozzle 122, a mounting hole is provided on the heating block 123, the other end of the throat 121 is connected to the end of the mounting hole close to the fixing mechanism 110, and the nozzle 122 is connected to the end of the mounting hole away from the fixing mechanism 110. Thus, through the mounting hole, the throat 121 and the nozzle 122 and the heating block 123 can be connected, and the nozzle assembly 120 can be assembled, which is simple to operate and convenient to disassemble and assemble. At the same time, the throat 121 can be connected to the nozzle 122, so that the printing consumables can be provided to the nozzle 122 through the throat 121.

[0090] The heating block 123 at the lower end of the throat 121 is used to heat the consumables in the throat 121 so that the consumables are in a molten state for easy printing.

[0091] The fixing mechanism 110 is located above the heating block 123 , which can prevent the heat generated by the heating block 123 from being conducted to the upper end of the throat 121 , causing the printing consumables to melt prematurely and block the throat 121 .

[0092] In some possible embodiments provided by the present invention, the fixing mechanism 110 includes a heat sink, and the nozzle assembly 120 includes a throat 121, which can be inserted into or detached from the channel 111. It can be understood that the throat 121, the heating block 123 and the nozzle 122 can be installed and connected together to form the nozzle assembly 120, and the throat 121 can be inserted into or detached from the channel 111 on the heat sink, thereby enabling the nozzle assembly 120 including the nozzle 122 to be quickly disassembled and assembled from the heat sink, which is simple to operate and convenient to disassemble and assemble.

[0093] The second embodiment of the utility model provides a three-dimensional molding device, including: a guide frame and a print head 100 of any embodiment of the first aspect, the print head 100 being mounted on the guide frame. Since the three-dimensional molding device includes the print head 100 of any of the aforementioned embodiments, it has all the technical effects of the aforementioned print head 100, which will not be described in detail here.

[0094] In an optional embodiment, the three-dimensional molding device also includes a printing platform, and the print head 100 can be movably arranged on a guide frame, so that the print head 100 can be moved along the guide frame to a suitable position of the printing platform, and the nozzle sprays the consumables onto the printing platform to realize the printing operation.

[0095] Specifically, if Figures 1 to 7 As shown, the utility model also provides the following implementation modes:

[0096] Label 1, a print head 100, including: a fixing mechanism 110, the fixing mechanism 110 is provided with a channel 111; a nozzle assembly 120, the nozzle assembly 120 can be inserted into or detached from the channel 111; a locking mechanism 130, the locking mechanism 130 is installed on the fixing mechanism 110, the locking mechanism 130 includes a first position and a second position, in the first position, the locking mechanism 130 extends into the channel 111 and cooperates with the nozzle assembly 120 to limit the relative movement between the nozzle assembly 120 and the fixing mechanism 110, and in the second position, the locking mechanism 130 is located outside the channel 111 to release the limitation of the relative movement between the nozzle assembly 120 and the fixing mechanism 110.

[0097] 2. According to the print head 100 of number 1, a positioning portion 1211 is provided on the nozzle assembly 120, and the locking mechanism 130 includes an operating member 131 rotatably arranged relative to the fixing mechanism 110, and a locking member 132 linked to the operating member 131, and part of the operating member 131 is located outside the fixing mechanism 110. In the first position, the locking member 132 extends into the channel 111 to cooperate with the positioning portion 1211, and in the second position, the locking member 132 is located outside the channel 111.

[0098] Label 3, according to the print head 100 of label 2, the locking mechanism 130 also includes a shell 133 connected to the fixing mechanism 110, the shell 133 is provided with an operating port 1331 and a through hole 1332, the operating member 131 includes a connecting portion 1311 rotatably connected to the inner wall of the shell 133, and an operating portion 1312 extending to the outside of the fixing mechanism 110 through the operating port 1331, the locking member 132 is connected to the connecting portion 1311, and can extend to the outside of the shell 133 through the through hole 1332 to be located in the channel 111.

[0099] Reference numeral 4: According to the print head 100 of reference numeral 3, the housing 133 and the connecting portion 1311 are rotationally connected via a spiral structure.

[0100] Label 5, according to the print head 100 of label 4, the number of turns of the spiral structure is less than one turn, and the locking mechanism 130 also includes an elastic member 134, which is connected between the shell 133 and the connecting part 1311 to apply a force of the shell 133 close to the channel 111 side to the connecting part 1311.

[0101] Reference numeral 6: According to the print head 100 of reference numeral 4, the number of turns of the spiral structure is greater than or equal to one turn.

[0102] Reference numeral 7, according to the print head 100 of reference numeral 3, a limiting boss 1321 is provided on the peripheral side of the locking member 132, and a laterally opening limiting groove is provided at the end of the connecting portion 1311 close to the through hole 1332, and the limiting boss 1321 is accommodated in the limiting groove.

[0103] Label 8, according to the print head 100 of label 3, an escape opening 1333 opposite to the through hole 1332 is opened at the end of the shell 133 away from the through hole 1332, and the end of the locking member 132 away from the channel 111 is penetrated by the operating member 131 and is located in the escape opening 1333; wherein, the locking member 132 in the first position is located inside the escape opening 1333, and the locking member 132 in the second position extends to the outside of the escape opening 1333.

[0104] Label 9, according to the print head 100 of label 3, the shell 133 includes a first shell 1334 and a second shell 1335 that are detachably connected, the adjacent ends of the first shell 1334 and the second shell 1335 are combined to form an operation port 1331, a through hole 1332 is provided at the end of the second shell 1335 away from the first shell 1334, and the connecting portion 1311 is rotatably connected to the second shell 1335.

[0105] Label 10, the print head 100 according to label 9, also includes: a first connecting member 140, a first connecting hole 1336 is provided on at least one of the first shell 1334 and the second shell 1335, a second connecting hole 114 is opened on the fixing mechanism 110, and the first connecting member 140 connects the shell 133 and the fixing mechanism 110 through the first connecting hole 1336 and the second connecting hole 114.

[0106] Reference numeral 11, according to the print head 100 of reference numeral 2, the nozzle assembly 120 comprises a throat 121, and the positioning portion 1211 comprises a positioning groove arranged on the periphery of the throat 121;

[0107] The locking member 132 includes a latch, and a guide surface 1322 matching the positioning groove is provided at the end of the latch facing the channel 111 .

[0108] Reference numeral 12. According to the print head of reference numeral 11, the positioning groove comprises an annular groove.

[0109] Label 13, according to the print head 100 of label 11, the nozzle assembly 120 also includes: a heating block 123 and a nozzle 122, the heating block 123 is provided with a mounting hole, the other end of the throat 121 is connected to the end of the mounting hole close to the fixing mechanism 110, and the nozzle 122 is connected to the end of the mounting hole away from the fixing mechanism 110.

[0110] Label 14, according to the print head of label 1, the fixing mechanism 110 includes a heat sink, the nozzle assembly 120 includes a throat 121, and the throat 121 can be inserted into or separated from the channel 111.

[0111] In an optional embodiment, the utility model also provides the following implementation mode:

[0112] Label 15. A three-dimensional molding device, comprising: a guide frame and a print head 100 as any one of labels 1 to 14, wherein the print head 100 is mounted on the guide frame.

[0113] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the terms "upper" and "lower" indicate positions or positional relationships based on the positions or positional relationships described in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0114] For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A print head, characterized in that: include: A fixing mechanism, wherein the fixing mechanism is provided with a passage; a spray head assembly, the spray head assembly being insertable into or detachable from the passage; A locking mechanism, wherein the locking mechanism is mounted on the fixing mechanism, and the locking mechanism includes a first position and a second position. In the first position, the locking mechanism extends into the channel to cooperate with the spray head assembly to limit the relative movement between the spray head assembly and the fixing mechanism. In the second position, the locking mechanism is located outside the channel to release the limitation on the relative movement between the spray head assembly and the fixing mechanism.

2. The print head according to claim 1, characterized in that: A positioning portion is provided on the nozzle assembly, and the locking mechanism includes an operating member rotatably arranged relative to the fixing mechanism, and a locking member linked to the operating member, part of the operating member is located outside the fixing mechanism, in the first position, the locking member extends into the channel and cooperates with the positioning portion, and in the second position, the locking member is located outside the channel.

3. The print head according to claim 2, characterized in that: The locking mechanism also includes a shell connected to the fixing mechanism, the shell is provided with an operating port and a through hole, the operating member includes a connecting portion rotatably connected to the inner wall of the shell, and an operating portion extending to the outside of the fixing mechanism through the operating port, the locking member is connected to the connecting portion, and can extend to the outside of the shell through the through hole to be located in the channel.

4. The print head according to claim 3, characterized in that: The shell and the connecting part are rotationally connected via a spiral structure.

5. The print head according to claim 4, characterized in that: The number of turns of the spiral structure is less than one turn, and the locking mechanism further includes an elastic member connected between the shell and the connecting portion to apply a force of the shell close to the channel side to the connecting portion.

6. The print head according to claim 4, characterized in that: The number of turns of the spiral structure is greater than or equal to one turn.

7. The print head according to claim 3, characterized in that: A limiting boss is arranged on the peripheral side of the locking member, and a limiting groove with a lateral opening is arranged at the end of the connecting portion close to the through hole, and the limiting boss is accommodated in the limiting groove.

8. The print head according to claim 3, characterized in that: The end of the shell away from the through hole is provided with an escape opening opposite to the through hole, and the end of the locking member away from the channel is penetrated by the operating member and is located in the escape opening; Wherein, the locking member in the first position is located inside the escape opening, and the locking member in the second position extends to the outside of the escape opening.

9. The print head according to claim 3, characterized in that: The shell includes a first shell and a second shell that are detachably connected, the adjacent ends of the first shell and the second shell enclose the operation port, the end of the second shell away from the first shell is provided with the through hole, and the connecting part is rotatably connected to the second shell.

10. The print head according to claim 9, characterized in that: Also includes: A first connecting member, at least one of the first shell and the second shell is provided with a first connecting hole, the fixing mechanism is provided with a second connecting hole, and the first connecting member connects the shell and the fixing mechanism through the first connecting hole and the second connecting hole.

11. The print head according to claim 2, characterized in that: The nozzle assembly includes a throat, and the positioning portion includes a positioning groove arranged on the periphery of the throat; The locking member comprises a bayonet, and the end of the bayonet facing the channel is provided with a guide surface matching the positioning groove.

12. The print head according to claim 11, characterized in that: The positioning groove comprises an annular groove.

13. The print head according to claim 11, characterized in that: The nozzle assembly also includes: A heating block and a nozzle, wherein the heating block is provided with a mounting hole, the other end of the throat is connected to an end of the mounting hole close to the fixing mechanism, and the nozzle is connected to an end of the mounting hole away from the fixing mechanism.

14. The print head according to claim 1, characterized in that: The fixing mechanism comprises a heat sink, and the nozzle assembly comprises a throat, which can be inserted into or separated from the channel.

15. A three-dimensional forming device, characterized in that: include: A guide frame and a print head as claimed in any one of claims 1 to 14, wherein the print head is mounted on the guide frame.

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