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 mounting block, and the mounting block is provided with a first mounting space, a second mounting space and a channel communicating with the first mounting space and the second mounting space; the connecting piece is detachably connected with the mounting block through the first mounting space; the clamping piece is movably arranged in the channel; the switching mechanism is at least partially located in the second mounting space, and the switching mechanism comprises a fixing position and a releasing position; in the fixing position, the switching mechanism extrudes the clamping piece, the clamping piece abuts against the connecting piece so that the connecting piece can be fixed, and in the releasing position, the clamping piece can at least move in the channel so that the clamping piece can loosen the connecting piece. Therefore, a user can operate the switching mechanism outside the mounting block by hands to realize quick disassembly and portable assembly of the mounting block and the connecting piece, and the maintenance and part replacement efficiency can be improved.

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] 3D printing equipment, also known as three-dimensional printing equipment (3Dimension Printer, 3DP), is a cumulative manufacturing technology, that is, a machine of rapid prototyping technology. It is based on a digital model file and uses special wax materials, powdered metal or plastic and other adhesive materials to print multiple layers of adhesive materials in sequence to create three-dimensional objects.

[0003] In the long-term use of current 3D printing equipment, the nozzle of the nozzle assembly is prone to wear, blockage and other faults. Therefore, the nozzle assembly needs to be disassembled to replace or repair the nozzle. Since the current nozzle is threaded, special tools are required to disassemble the nozzle, which is difficult to disassemble and inconvenient to repair. 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 switching mechanism by hand outside the heat sink to achieve rapid disassembly and portable assembly of components including the nozzle. The operation is simple and the disassembly and assembly are convenient, which is conducive to improving the efficiency of maintenance and replacement.

[0005] In a first aspect of the utility model, a print head is provided, comprising: a mounting block, the mounting block being provided with a first mounting space, a second mounting space, and a passage connecting the first mounting space and the second mounting space;

[0006] A connecting piece, the connecting piece is detachably connected to the mounting block through the first mounting space;

[0007] A clamping member, the clamping member is movably arranged in the passage;

[0008] A switching mechanism, the switching mechanism is at least partially located in the second installation space, and the switching mechanism includes a fixed position and a released position; in the fixed position, the switching mechanism squeezes the clamping member, and the clamping member presses against the connecting member to fix the connecting member, and in the released position, the clamping member can at least move in the channel to allow the clamping member to loosen the connecting member.

[0009] Furthermore, the connecting member is provided with a positioning portion which can be located in the first installation space;

[0010] The shape of the clamping piece matches that of the positioning portion;

[0011] In the fixed position, the switching mechanism squeezes the clamping member, and the clamping member abuts against the positioning portion to clamp the connecting member;

[0012] The first installation space includes a first installation hole, and the second installation space includes a second installation hole.

[0013] Further, the switching mechanism includes a pressing member and an elastic member, at least a portion of the pressing member is slidably disposed in the second installation space, and includes a release position and a fixed position relative to the installation block, the elastic member is located between the pressing member and the installation block to generate a force that switches the pressing member from the release position to the fixed position, and a limiting groove is provided on one side of the pressing member facing the channel;

[0014] Among them, in the release position, the elastic part is compressed, and the limit groove and the channel are connected, so that the card member can move between the limit groove and the channel. In the fixed position, the limit groove and the channel are misaligned so that part of the card member extends into the first installation space; the card member includes a card bead.

[0015] Furthermore, a guide groove connected to the limiting groove is provided on the side wall of the pressing member close to the channel, and the bottom of the guide groove is arranged in an ascending wedge shape from the side close to the limiting groove to the side away from the limiting groove. When the pressing member is in a fixed position, the guide groove is isolated from the channel.

[0016] Further, the channel includes a port communicating with the first installation space, and a diameter of the port is smaller than a diameter of the clamping member.

[0017] Furthermore, the print head further comprises:

[0018] A first stopper, the mounting block is provided with a first through hole communicating with the second mounting space, a first arm and a second arm are arranged at intervals on one side of the pressing member facing the first through hole along the sliding direction of the pressing member, the first stopper is detachably connected to the mounting block through the first through hole, and the first stopper can extend between the first arm and the second arm;

[0019] The elastic member is located between the first support arm and the second support arm, and two ends of the elastic member are used to contact the first support arm and the first limiting member respectively;

[0020] The dimension of the first limiting member located in the second installation space along the sliding direction of the pressing member is greater than the width of the gap between the elastic member and the second arm in a free state.

[0021] Furthermore, the print head further comprises:

[0022] A second limiting member, the mounting block is provided with a second through hole connected to the second mounting space, the second through hole is located on a side of the first through hole close to the first arm, the second limiting member is detachably connected to the mounting block through the second through hole and can extend into the second mounting space;

[0023] Wherein, the dimension of the second limiting member located in the second installation space along the sliding direction of the pressing member is smaller than the width of the gap between the elastic member and the second arm in the free state.

[0024] Furthermore, a side of the first arm facing the second through hole is provided with an avoidance groove flush with the second through hole, the avoidance groove extends along the sliding direction of the pressing member, and the shape of the avoidance groove matches the shape of the end of the second limiting member located in the second installation space.

[0025] Further, the first through hole is a threaded hole, and the first limiting member is a bolt; or,

[0026] The hole wall of the first through hole is provided with a first limiting surface, the first limiting member is a positioning pin, and the side wall of the positioning pin is provided with a second limiting surface matching the first limiting surface; or,

[0027] The second through hole is a round hole, and the second limiting member is a cylindrical pin; or,

[0028] The second through hole is a threaded hole, and the second limiting member is a bolt.

[0029] Further, the mounting block includes a heat sink, and the connecting piece includes a nozzle assembly; or,

[0030] The mounting block comprises a heating block, a nozzle is arranged on the heating block, and the connecting piece comprises a throat.

[0031] Further, if the connecting member includes a nozzle assembly, the nozzle assembly includes:

[0032] A throat, a heating block and a nozzle, wherein a mounting hole is provided on the heating block, a first end of the throat can be inserted into or out of a first mounting space, a second end of the throat is connected to an end of the mounting hole close to the heat dissipation block, and a nozzle is connected to an end of the mounting hole away from the heat dissipation block;

[0033] Wherein, the positioning portion includes an annular groove arranged on the circumference of the throat.

[0034] A 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.

[0035] The print head and three-dimensional molding device provided by the embodiment of the utility model, the print head includes a mounting block, a connecting member, a clamping member and a switching mechanism, the connecting member is detachably connected to the mounting block through the first mounting space on the mounting block, at least part of the switching mechanism is located in the second mounting space of the mounting block, and the clamping member is located in a channel connecting the first mounting space and the second mounting space. When the switching mechanism is in a fixed position, the switching mechanism squeezes the clamping member so that the clamping member clamps the positioning portion to achieve a fixed connection between the connecting member and the mounting block; when the switching mechanism is in a released position, the clamping member can at least move in the channel so that the clamping member releases the positioning portion to release the connecting member, so that the connecting member can be smoothly and conveniently taken out from the first mounting space, and the disassembly operation of the connecting member and the mounting block is achieved. Therefore, the user can realize the switching of the fixed position and the released position of the switching mechanism by operating the switching mechanism barehandedly, thereby realizing the installation and disassembly operation of the connecting member and the mounting block, and realizing the rapid disassembly of the connecting member or the mounting block including the nozzle. Compared with the related art in which the heating block and the heat dissipation block are connected by bolts to achieve the fixation of the throat and the heat dissipation block, and the bolts need to be tightened by operating tools to achieve the disassembly and assembly of the nozzle assembly and the heat dissipation block, the print head provided in this embodiment allows the user to operate the switching mechanism on the outside of the mounting block by hand without operating tools to achieve rapid disassembly and portable assembly of the connecting part and the mounting block, thereby achieving rapid disassembly of the connecting part or the mounting block including the nozzle. 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.

[0036] 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

[0037] 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:

[0038] Figure 1 An exploded schematic diagram of a print head of the utility model is shown;

[0039] Figure 2 A schematic structural diagram showing a print head of the utility model when the second limiting member is disassembled from one viewing angle;

[0040] Figure 3 A schematic diagram showing the structure of the print head of the utility model after being assembled from one viewing angle;

[0041] Figure 4 A cross-sectional view from one viewing angle when the print head of the utility model is assembled with the second limiting member is shown;

[0042] Figure 5 A cross-sectional view showing a switching mechanism of the print head of the utility model in a fixed position from one viewing angle;

[0043] Figure 6 A cross-sectional view from one perspective showing a switching mechanism of a print head of the utility model in a released position.

[0044] in, Figures 1 to 6 The corresponding relationship between the reference numerals and the component names is as follows:

[0045] 100 print head, 110 heat sink, 111 first installation space, 112 second installation space, 113 channel, 1131 port, 114 first through hole, 115 second through hole, 120 nozzle assembly, 121 throat, 1211 positioning portion, 122 heating block, 123 nozzle, 130 switching mechanism, 131 pressing member, 1311 limiting groove, 1312 guide groove, 1313 first support arm, 1314 second support arm, 1315 avoidance groove, 132 elastic member, 170140 first limiting member, 150 second limiting member, 160 connecting seat, 170 clamping member. DETAILED DESCRIPTION

[0046] 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.

[0047] Refer to the following Figures 1 to 6 The print head 100 and the stereoscopic molding device provided according to some embodiments of the utility model are described. The stereoscopic molding device can be a fused deposition type printer, inkjet printing, etc. Specifically, the stereoscopic molding device can be an FDM (Fused Deposition Modeling) printer, wherein the print head 100 can be applied to the stereoscopic molding device.

[0048] like Figure 1 , Figure 5 and Figure 6As shown, an embodiment of the first aspect of the utility model provides a print head 100, including: a mounting block, the mounting block is provided with a first mounting space 111, a second mounting space 112, and a channel 113 connecting the first mounting space 111 and the second mounting space 112; a connecting member, the connecting member is detachably connected to the mounting block through the first mounting space 111; a clamping member 170, the clamping member 170 is movably arranged in the channel 113; a switching mechanism 130, the switching mechanism 130 is at least partially located in the second mounting space 112, and the switching mechanism 130 includes a fixed position and a release position; in the fixed position, the switching mechanism 130 squeezes the clamping member 170 so that the clamping member 170 presses against the connecting member, and in the release position, the clamping member 170 can at least move in the channel 113 so that the clamping member 170 releases the connecting member.

[0049] The first installation space 111 may include a first installation hole, and the second installation space 112 may include a second installation hole, that is, the first installation space may be formed by at least the first installation hole, and the second installation space 112 may be formed by at least the second installation hole. In the present application, the first installation hole and the second installation hole are not limited to through holes or blind holes.

[0050] The connector may be provided with a positioning portion 1211 that can be located in the first installation space 111, and the clamping member 170 matches the shape of the positioning portion 1211; in the fixed position, the switching mechanism 130 squeezes the clamping member 170, and the clamping member 170 presses against the positioning portion 1211 to clamp the connector. It can be understood that the positioning portion 1211 may not be provided on the connector, and the connector can be fixed if the clamping member 170 presses against the connector with sufficient force.

[0051] The switching mechanism 130 includes a fixed position and a release position, which can be understood as the user operating the switching mechanism 130 by hand to switch between the fixed position and the release position of the switching mechanism 130. At least part of the switching mechanism 130 is located in the second installation space 112, and a part of the switching mechanism 130 can be located in the second installation space 112, and another part of the switching mechanism 130 is located outside the second installation space 112, such as another part of the switching mechanism 130 is located outside the mounting block, thereby, the user operates the switching mechanism 130 by hand outside the second installation space 112 to switch between the fixed position and the release position of the switching mechanism 130. Alternatively, the entire switching mechanism 130 is located in the second installation space 112, and the second installation space 112 is connected to the external environment. The user's finger is inserted into the second installation space 112 to operate the switching structure by hand, and the switching between the fixed position and the release position of the switching mechanism 130 can be achieved, thereby achieving the installation and disassembly operations of the connector and the mounting block, and achieving the rapid disassembly of the connector or the mounting block including the nozzle.

[0052] The print head 100 provided by the embodiment of the utility model comprises a mounting block, a connecting member, a clamping member 170 and a switching mechanism 130, wherein the connecting member is detachably connected to the mounting block through a first mounting space 111 on the mounting block, at least part of the switching mechanism 130 is located in a second mounting space 112 of the mounting block, and the clamping member 170 is located in a channel 113 connecting the first mounting space 111 and the second mounting space 112. When the switching mechanism 130 is in a fixed position, the switching mechanism 130 squeezes the clamping member 170 so that the clamping member 170 clamps the positioning portion 1211, and the limiting effect of the clamping member 170 and the positioning portion 1211 is used to realize the fixed connection between the connecting member and the mounting block. When the switching mechanism 130 is in the release position, the clamping member 170 can at least move in the channel 113, such as the clamping member can move in the channel 113 and the second installation space 112, so that the clamping member 170 releases the positioning portion 1211, so that the clamping member 170 and the positioning portion 1211 release the limiting effect, and then loosens the connecting member, realizes the separation of the connecting member and the mounting block, so that the connecting member can be smoothly and conveniently taken out from the first installation space 111, realizes the disassembly operation of the connecting member and the mounting block, and thus realizes the rapid disassembly of the connecting member or the mounting block including the nozzle. It can be understood that when the switching mechanism 130 is in the release position, the connecting member can be inserted into the first installation space 111, and the position of the connecting member in the first installation space 111 is adjusted so that the positioning portion 1211 on the connecting member is opposite to the channel 113, so that when the switching mechanism 130 is switched to the fixed position, the clamping member 170 can smoothly and accurately clamp the positioning portion 1211 to realize the rapid connection between the connecting member and the mounting block.

[0053] That is to say, with the print head 100 provided in the embodiment of the utility model, the user can realize the switching of the fixing position and the releasing position of the switching mechanism 130 by manually operating the switching mechanism 130, and then can realize the installation and disassembly operations of the connecting member and the mounting block, that is, realize the rapid disassembly of the connecting member or the mounting block including the nozzle. 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 heat dissipation block, and the bolts need to be screwed with operating tools to realize the disassembly and assembly of the nozzle assembly and the heat dissipation block, with the print head 100 provided in the present embodiment, the user can operate the switching mechanism 130 by hand without operating tools to realize the rapid disassembly and portable assembly of the connecting member and the mounting block. 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.

[0054] Wherein, the mounting block includes a heat dissipation block 110, the connecting piece includes a nozzle assembly 120, and the nozzle assembly 120 includes a nozzle 123, that is, when removing the nozzle 123, the nozzle assembly 120 including the nozzle 123 is removed from the heat dissipation block 110; or,

[0055] The mounting block includes a heating block 122, on which a nozzle 123 is provided, and the connecting piece includes a throat 121, which can be connected to the guide frame of the three-dimensional forming equipment, that is, when removing the nozzle 123, the heating block 122 and the nozzle 123 are removed from the throat together.

[0056] It is understood that in the present application, it is not limited to whether the mounting block includes the heat dissipation block 110 or the heating block 122, as long as the nozzle 123 can be quickly disassembled. The present application will be described later by taking the mounting block including the heat dissipation block 110 and the connecting member including the nozzle assembly 120 as an example, but this is not limited to this.

[0057] The first installation space 111 and the second installation space 112 may be arranged on the same straight line, or the first installation space 111 and the second installation space 112 may be arranged vertically or tilted to meet the requirements of different structures of the switching mechanism 130 .

[0058] Among them, when the switching mechanism 130 is in the release position, the clamping member can at least move in the channel 113. It can be understood that when the switching mechanism 130 is in the release position, the clamping member 170 can at least move in the channel 113, so that the clamping member 170 can withdraw from the first installation space 112 to release the clamping limit effect on the positioning portion 1211. In some examples, the channel 113 can also be connected to other spaces, so that when the switching mechanism 130 is in the release position, the clamping member 170 can move in the channel 113 and other spaces.

[0059] like Figure 1 , Figure 5 and Figure 6 As shown, in some possible embodiments provided by the present invention, the switching mechanism 130 includes a pressing member 131 and an elastic member 132, at least a portion of the pressing member 131 can be slidably arranged in the second installation space 112, the relative position of the pressing member 131 and the heat dissipation block 110 includes a release position and a fixed position, the elastic member 132 is located between the pressing member 131 and the heat dissipation block 110 to generate a force that switches the pressing member 131 from the release position to the fixed position, and the pressing member 131 is provided with a limiting groove 1311 on one side of the channel 113; wherein, in the release position, the elastic member 132 is compressed, and the limiting groove 1311 is connected to the channel 113, so that the clamping member 170 can move between the limiting groove 1311 and the channel 113, and in the fixed position, the limiting groove 1311 is misaligned with the channel 113, so that part of the clamping member 170 extends into the first installation space 111.

[0060] The pressing member 131 is in a released position relative to the heat sink 110, which can be understood as the switching mechanism 130 is in a released position, and the pressing member 131 is in a fixed position relative to the heat sink 110, which can be understood as the switching mechanism 130 is in a fixed position. The setting of the pressing member 131 enables the user to press the pressing member 131 with bare hands to switch the pressing member 131 between the fixed position and the released position, thereby switching the switching mechanism between the fixed position and the released position.

[0061] In this embodiment, when the pressing member 131 is in the release position, it can be understood that the user can press the pressing member 131 to put the pressing member 131 in the release position. At this time, the elastic member 132 is compressed, and the limiting groove 1311 and the channel 113 are connected, so that the clamping member 170 can move in the limiting groove 1311 and the channel 113, and the clamping member 170 can move freely in the channel 113 and the limiting groove 1311 to exit the first installation space 111. In this state, the first end of the nozzle assembly 120 is inserted into the first installation space 111, and the position of the nozzle assembly 120 in the first installation space 111 is adjusted so that the positioning portion 1211 on the nozzle assembly 120 is opposite to the channel 113. Then, the user releases the pressing piece 131 in the release position, and under the action of the elastic piece 132, the pressing piece 131 is switched from the release position to the fixed position, and the limiting groove 1311 is misaligned with the channel 113, so that the movement space of the clamping piece 170 is limited, so that part of the clamping piece 170 extends into the first installation space 111 and cooperates with the positioning portion 1211, thereby limiting the relative movement of the nozzle assembly 120 and the heat sink 110, and realizing the fixed connection between the nozzle assembly 120 and the heat sink 110.

[0062] It can be understood that when the pressing piece 131 is switched from the fixed position to the release position again, such as the user presses the pressing piece 131 to switch the pressing piece from the fixed position to the release position, since the limiting groove 1311 on the pressing piece 131 is connected with the channel 113 on the heat sink 110 again, under the action of the nozzle assembly 120, the clamping piece 170 can be retracted from the first installation space 111 to the channel 113 and the limiting groove 1311, thereby releasing the limit between the clamping piece 170 and the positioning portion 1211, so that the nozzle assembly 120 can be smoothly and conveniently removed from the first installation space 111, thereby realizing the disassembly operation of the nozzle assembly 120 and the heat sink 110.

[0063] Therefore, with the print head 100 provided in the embodiment of the utility model, the user can realize the mutual switching of the release position and the fixed position of the pressing member 131 by hand, and cooperate with the elastic member 132, so as to realize the installation and disassembly operations of the nozzle assembly 120 and the heat sink 110. Compared with the related art in which the heating block and the heat sink are connected by bolts to realize the fixation of the throat and the heat sink, and the bolts need to be screwed with 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 press the pressing member 131 by hand on the outside of the heat sink 110 without operating tools to realize the rapid disassembly and portable assembly of the nozzle assembly 120 and the heat sink 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.

[0064] The elastic member 132 is located between the pressing member 131 and the heat sink 110. The elastic member 132 may be located directly between the pressing member 131 and the heat sink 110, that is, the two ends of the elastic member 132 face the pressing member 131 and the heat sink 110 respectively. Alternatively, the elastic member 132 is located indirectly between the pressing member 131 and the heat sink 110. The elastic member 132 is located indirectly between the pressing member 131 and the heat sink 110, which can be understood as follows: if a component is connected to the heat sink 110, if the elastic member 132 is located between the pressing member 131 and the component connected to the heat sink 110, it can also be understood that the elastic member 132 is located indirectly between the pressing member 131 and the heat sink 110; or, if a component is connected to the pressing member 131, if the elastic member 132 is located between the heat sink 110 and the component connected to the pressing member 131, it can also be understood that the elastic member 132 is located indirectly between the heat sink 110 and the pressing member 131.

[0065] Among them, because usually, the bottom of the heat sink 110 is used to connect the nozzle assembly 120, the first installation space 111 can be opened at the bottom of the heat sink 110. Specifically, the first installation space 111 can penetrate the heat sink 110 from the bottom to the top of the heat sink 110, and the nozzle assembly 120 can be located inside the first installation space 111, and communicate with the feeding pipe of the feeding mechanism that is also located inside the first installation space 111. Alternatively, the nozzle assembly 120 can extend from the bottom of the heat sink 110 through the first installation space 111 to the top of the heat sink 110, and communicate with the feeding pipe of the feeding mechanism. Among them, the top and bottom directions of the heat sink 110 can be as follows: Figure 1 In the arrow Z direction, the left and right directions of the heat sink 110 can be as follows Figure 1 As shown by the arrow X in FIG. 1 , the front-to-back direction of the heat sink 110 can be as shown in FIG. Figure 1 As shown by arrow Y in FIG. It can be understood that the front-to-back direction and the left-to-right direction of the heat sink block can be interchanged.

[0066] The second installation space 112 may be arranged vertically with the first installation space 111, that is, the second installation space 112 may be opened at the side of the heat sink 110. Specifically, the second installation space 112 may penetrate the heat sink 110 along the left-right direction or the front-back direction of the heat sink 110, or the second installation space 112 may have a groove bottom, which is located inside the heat sink 110. For example, one end of the second installation space 112 may be located at the side of the heat sink 110, and the other end of the second installation space 112 may be located inside the heat sink 110. Specifically, the user may press the pressing member 131 by hand through the opening of the second installation space 112 located at the side of the heat sink 110, so that the elastic member 132 is compressed and the pressing member 131 is in the release position. When the user releases his hand, the pressing member 131 is switched from the release position to the fixed position under the action of the elastic member 132. In order to facilitate the installation of the switching mechanism 130, the second installation space 112 may be set as a through groove that penetrates the heat sink 110.

[0067] It is understandable that in other examples, the second installation space 112 and the first installation space 111 may be arranged along the same straight line, that is, the second installation space 112 is arranged along the top and bottom direction of the heat sink 110. In this example, the switching mechanism 130 may be switched between the release position and the fixed position by screws.

[0068] like Figure 1 and Figure 4 As shown, in some possible embodiments provided by the present invention, the locking member 170 is a locking bead, which has a spherical structure. The spherical structure can roll smoothly along the channel 113 connecting the first installation space 111 and the second installation space 112 within a sufficient space, so that when the switching mechanism 130 is in different positions of the fixed position and the release position, the locking bead can run to different positions along the channel 113, thereby achieving locking or release with the positioning portion 1211, so as to ensure smooth disassembly and assembly of the nozzle assembly 120 and the heat sink 110.

[0069] The card bead can be made of metal, glass, etc. The outer surface of the card bead made of metal or glass is relatively smooth, which is conducive to improving the flexibility and smoothness of the card bead moving in the channel 113, so as to ensure the accuracy and reliability of the switching of the pressing member 131 between the release position and the fixed position. Specifically, the card bead can be a steel ball.

[0070] like Figure 4 and Figure 5As shown, in some possible embodiments provided by the present invention, a guide groove 1312 connected to the limiting groove 1311 is provided on the side wall of the pressing member 131 close to the channel 113, and the bottom of the guide groove 1312 is set to be an ascending wedge shape from the side close to the limiting groove 1311 to the side away from the limiting groove 1311. When the pressing member 131 is in a fixed position, the guide groove 1312 is isolated from the channel 113.

[0071] In this embodiment, the setting of the guide groove 1312 has a good guiding effect, so that when the pressing piece 131 is switched between the fixed position and the released position, the locking piece 170 can move smoothly and stably to the inside of the limiting groove 1311 or escape from the limiting groove 1311 under the guiding effect of the guide groove 1312, thereby reducing the occurrence of the locking piece 170 being stuck with the limiting groove 1311 or being unable to be accurately accommodated in the limiting groove 1311, which is beneficial to ensuring the accuracy and reliability of the movement of the pressing piece 131 relative to the heat sink 110 during the switching process between the released position and the fixed position, thereby improving the accuracy of the installation and disassembly process of the nozzle assembly 120 and the heat sink 110, and is beneficial to improving the disassembly efficiency of the heat sink 110.

[0072] Among them, Figure 5 and Figure 6 As shown, the bottom of the guide groove 1312 is set to a rising wedge shape from the side close to the limiting groove 1311 to the side away from the limiting groove 1311, that is, the bottom of the guide groove 1312 is set to an inclined surface inclined upward from the side close to the limiting groove 1311 to the side away from the limiting groove 1311, thereby allowing the pressing piece 131 to move smoothly and steadily relative to the heat sink 110 during the switching process between the release position and the fixed position.

[0073] like Figure 4 As shown, in some possible embodiments provided by the present invention, the channel 113 includes a port 1131 communicating with the first installation space 111 , and the diameter of the port 1131 is smaller than the diameter of the clamping member 170 .

[0074] In this embodiment, the diameter of the port 1131 connecting the channel 113 with the first installation space 111 is smaller than the diameter of the locking component 170, so that when the locking component 170 moves to the port 1131 connected to the first installation space 111, it can be locked at the port 1131 and will not be separated from the channel 113 from the port 1131, and part of the locking component 170 will extend through the port 1131 into the first installation space 111 to cooperate with the positioning portion 1211 of the nozzle assembly 120, thereby avoiding the problem of the locking component 170 being separated from the port 1131 and the channel 113.

[0075] It is understandable that the channel 113 may include two ports, one of which is connected to the first installation space 111, that is, Figure 4As shown in the port 1131 in the figure, the other is connected to the second installation space 112, and the diameter between the two ports of the channel 113 can be greater than or equal to the diameter of the clamping member 170 to ensure that the clamping member 170 can move smoothly in the channel 113.

[0076] The channel 113 may be linear to improve the smoothness of the movement of the clamping member 170 between the two ports 1131. It is understandable that the diameter of the port connecting the channel 113 and the second installation space 112 may be larger than the diameter of the clamping member 170 to facilitate the smooth installation of the clamping member 170 in the channel 113.

[0077] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, in some possible embodiments provided by the present invention, the three-dimensional forming equipment also includes a first limiting member 140, the heat sink 110 is provided with a first through hole 114 connected to the second installation space 112, and the pressing member 131 is provided with a first arm 1313 and a second arm 1314 at intervals along the sliding direction of the pressing member 131 on one side facing the first through hole 114, the first limiting member 140 is detachably connected to the heat sink 110 through the first through hole 114, and the first limiting member 140 can extend between the first arm 1313 and the second arm 1314.

[0078] Therefore, when the pressing piece 131 slides relative to the heat sink 110, the limiting action of the first arm 1313 and the first limiting piece 140, and the limiting action of the second arm 1314 and the second limiting piece 150 can prevent the pressing piece 131 from detaching from the second installation space 112, that is, it can prevent the pressing piece 131 from detaching from the heat sink 110, thereby ensuring that the pressing piece 131 can reliably switch between the release position and the fixed position.

[0079] The first stopper 140 is detachably connected to the heat sink 110, which can facilitate the assembly and disassembly of the switching mechanism 130 and the heat sink 110, and is conducive to improving the maintenance efficiency of the switching mechanism 130. Specifically, the first stopper 140 can be detachably connected to the heat sink 110 by at least one of a threaded structure, a clamping structure, a plug-in structure, and a mortise and tenon structure.

[0080] Specifically, the pressing member 131 may be a wedge-shaped block or other structures.

[0081] like Figure 4 , Figure 5 and Figure 6As shown, in some possible embodiments provided by the present invention, the elastic member 132 is located between the first arm 1313 and the second arm 1314 , and both ends of the elastic member 132 are used to contact the first arm 1313 and the first limiting member 140 respectively.

[0082] That is to say, the elastic member 132 is arranged in the accommodating space formed by the first arm 1313 and the second arm 1314, and the two ends of the elastic member 132 are respectively in contact with the first limit member 140 and the first arm 1313. This arrangement enables the elastic member 132 to reasonably utilize the space formed between the first arm 1313 and the second arm 1314, and by contacting the first limit member 140, indirect contact with the heat sink 110 can be achieved, which can meet the design requirements of the switching mechanism 130 with a compact structure and a small size, and further meet the design requirements of the print head 100 with a compact structure and a small size.

[0083] Among them, the first end of the elastic member 132 contacts the first limiting member 140, and the first end of the elastic member 132 can be in contact with the first limiting member 140 through any connection method such as abutment, card connection, hook connection, and plug-in connection. The second end of the elastic member 132 contacts the first support arm 1313, and the second end of the elastic member 132 can be in contact with the first support arm 1313 through any connection method such as abutment, card connection, hook connection, and plug-in connection.

[0084] Specifically, the elastic member 132 may be a spring, a spring sheet, or other elastic mechanisms.

[0085] like Figure 4 and Figure 5 As shown, in some possible embodiments provided by the present invention, the size of the first limit member 140 located in the second installation space 112 along the sliding direction of the pressing member 131 is greater than the gap width between the elastic member 132 and the second arm 1314 in a free state.

[0086] Among them, Figure 4 and Figure 5 As shown, the sliding direction of the pressing member 131 can be as follows Figure 4 , Figure 5 As shown by the arrow X in FIG. 1 , the size of the first stopper 140 located in the second installation space 112 along the sliding direction of the pressing member 131 can be as follows: Figure 5 As shown in D1 in FIG. 1 , the gap width between the elastic member 132 and the second arm 1314 in the free state can be as follows: Figure 4Specifically, the gap width between the elastic member 132 and the second arm 1314 in the free state can be understood as follows: when the elastic member 132 is not subjected to pressure, the second end of the elastic member 132 is connected to the first arm 1313, and the gap width between the second end of the elastic member 132 and the second arm 1314 is the gap width between the elastic member 132 and the second arm 1314 in the free state.

[0087] In this embodiment, by limiting the dimension of the first limiting member 140 located in the second installation space 112 along the sliding direction of the pressing member 131 to be greater than the gap width between the elastic member 132 and the second arm 1314 in the free state, that is, D1>D0, the first limiting member 140 is located between the first arm 1313 and the second arm 1314, and after the two ends of the elastic member 132 contact the first arm 1313 and the first limiting member 140 respectively, the elastic member 132 is compressed between the first limiting member 140 and the first arm 1313, thereby, after the pressing member 131 is released at the release position, under the action of the elastic member 132, the pressing member 131 can be quickly reset to the fixed position and can be reliably and stably maintained at the fixed position.

[0088] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some possible embodiments provided by the present invention, the print head 100 also includes a second limit member 150, the heat sink 110 is provided with a second through hole 115 connected to the second installation space 112, the second through hole 115 is located on the side of the first through hole 114 close to the first support arm 1313, and the second limit member 150 is detachably connected to the heat sink 110 through the second through hole 115 and can extend into the second installation space 112; wherein, the size of the second limit member 150 located in the second installation space 112 along the sliding direction of the pressing member 131 is smaller than the gap width between the elastic member 132 and the second support arm 1314 in a free state.

[0089] Among them, Figure 4 As shown, the sliding direction of the pressing member 131 can be as follows Figure 4 As shown by the arrow X in FIG. 1 , the size of the second stopper 150 located in the second installation space 112 along the sliding direction of the pressing member 131 can be as follows: Figure 4 As shown in D2 in FIG. 1 , the gap width between the elastic member 132 and the second arm 1314 in the free state can be as follows: Figure 4 As shown in D0, that is, D2<D0.

[0090] In this embodiment, the second stopper 150 is provided to facilitate the assembly of the first stopper 140. Specifically, since the dimension of the first stopper 140 located in the second installation space 112 along the sliding direction of the pressing member 131 is larger than the gap width between the elastic member 132 and the second arm 1314 in the free state, it is not convenient to directly install the first stopper 140 between the elastic member 132 and the second arm 1314. To this end, the second stopper 150 is detachably connected to the heat sink 110 and can extend into the second installation space 112. During the assembly process of the switching mechanism 130, as shown in FIG. Figure 4 As shown, the first stopper 140 can be first extended into the second installation space 112 through the second through hole 115. Since the size of the second stopper 150 in the second installation space 112 along the sliding direction of the pressing member 131 is smaller than the gap width between the elastic member 132 and the second arm 1314 in the free state, the second stopper 150 can extend to between the first end of the elastic member 132 and the second arm 1314 when the elastic member 132 is in the free state. Then, the pressing member 131 is pressed. Since the second stopper 150 abuts against the elastic member 132, the elastic member 132 is compressed and the pressing member 131 can move toward the first through hole 114, so that there is a larger gap between the second arm 1314 and the second stopper 150. Specifically, the gap width between the second arm 1314 and the second stopper 150 is larger than the size of the first stopper 140 in the second installation space 112 along the sliding direction of the pressing member 131. Therefore, in this state, the first stopper 140 is extended from the first through hole 114 into the second installation space 112 and extends to between the second arm 1314 and the second stopper 150, and then the pressing member 131 is released. Under the action of the elastic member 132, the second arm 1314 abuts against the first stopper 140. Figure 2 and Figure 3 As shown, the first limiting member 140 is disengaged from the first through hole 114, that is, the first limiting member 140 and the heat sink 110 are separated, and the elastic member 132 recovers its deformation so that the first end of the elastic member 132 abuts against the first limiting member 140, thereby allowing the first limiting member 140 to be located between the second arm 1314 and the elastic member 132, the first end of the elastic member 132 abuts against the first limiting member 140, and the second end of the elastic member 132 is connected to the first arm 1313, thereby completing the assembly of the switching mechanism 130 and the first limiting member 140, which is simple to operate and easy to install.

[0091] It can be understood that in the process of installing the second limiting member 150, the locking member 170 can be first placed into the channel 113, the second end of the elastic member 132 can be fixedly connected or abutted with the first arm 1313 by a hook or the like, the elastic member 132 can be placed between the first arm 1313 and the second arm 1314, and then the pressing member 131 can be pushed into the second installation space 112 from one end of the second arm 1314. Make the second arm 1314 and the first arm 1313 roughly located on both sides of the second through hole 115, then extend the second limiting member 150 through the second through hole 115 into the second installation space 112, adjust the length of the second limiting member 150 extending into the second installation space 112 so that it is located between the second arm 1314 and the first arm 1313, and does not extend to contact the elastic member 132, then adjust the position of the pressing member 131 in the second installation space 112 so that the second arm 1314 abuts against the second limiting member 150, and then maintain this position so that the second limiting member 150 continues to extend into the second installation space 112, when the end of the second limiting member 150 abuts against the heat sink 110, the assembly of the second limiting member 150 is completed, so that the second limiting member 150 is located between the second arm 1314 and the elastic member 132.

[0092] It can be understood that when the switching mechanism 130 and the heat sink 110 need to be separated, the first limiting member 140 is disengaged from the first through hole 114, that is, the first limiting member 140 is disassembled and separated from the heat sink 110, and then the pressing member 131 is pressed by hand to make part of the pressing member 131 protrude from the second installation space 112, thereby facilitating the user to remove the pressing member 131 from the second installation space 112, and the operation is simple.

[0093] like Figure 1 and Figure 4 As shown, in some possible embodiments provided by the present invention, a first arm 1313 is provided with an avoidance groove 1315 flush with the second through hole 115 on one side thereof facing the second through hole 115, and the avoidance groove 1315 extends along the sliding direction of the pressing member 131, and the shape of the avoidance groove 1315 matches the shape of the end of the second limiting member 150 located in the second installation space 112.

[0094] This arrangement facilitates the assembly of the second position limiting member 150 , and helps to improve the assembly efficiency and assembly accuracy of the second position limiting member 150 .

[0095] Specifically, during the assembly of the second limiting member 150, the locking member 170 can be first placed into the channel 113, the second end of the elastic member 132 can be fixedly connected to the first arm 1313 by a hook or the like, the elastic member 132 can be placed between the first arm 1313 and the second arm 1314, and then the second arm 1314 of the pressing member 131 can be pushed into the second installation space 112 from one end of the second installation space 112. Then, the second limiting member 150 is extended through the second through hole 115 to a small part of the second installation space 112, so that the second arm 1314 is avoided through the avoidance groove 1315 to become the second limiting member 150 located in the second installation space 112, so as to pass through the second through hole 115 smoothly, and then the pressing member 131 is continued to be pressed toward the inside of the second installation space 112. Since the first arm 1313 is not provided with an avoidance groove, the first arm 1313 is in contact with the second limiting member 150, and then the second limiting member 150 continues to extend into the second installation space 112 without contacting the elastic member 132. Next, the pressing member 131 is pushed from the other end of the second installation space 112 so that the second arm 1314 of the pressing member 131 abuts against the second limiting member 150, and then maintained at this position so that the second limiting member 150 continues to extend into the second installation space 112. When the end of the second limiting member 150 abuts against the heat sink 110, the assembly of the second limiting member 150 is completed, so that the second limiting member 150 is located between the second arm 1314 and the elastic member 132.

[0096] It is understandable that, in the assembly process of the second stopper 150, the second stopper 150 may be first extended to a small portion of the second installation space 112 through the second through hole 115, and then the second arm 1314 of the pressing member 131 is pushed into the second installation space 112 from one end of the second installation space 112, so that the second arm 1314 avoids the second stopper located in the second installation space 112 through the avoidance groove 1315, so as to smoothly pass through the second through hole 115. The subsequent steps are consistent with the aforementioned assembly process and will not be repeated here.

[0097] like Figure 1 and Figure 4As shown, in some possible embodiments provided by the present invention, the first through hole 114 is a threaded hole, and the first stopper 140 is a bolt. The threaded hole is easy to process and has a low processing cost. The bolt is a standard part with a low manufacturing cost, which is suitable for popularization and application. In addition, the first stopper 140 and the heat sink 110 can be quickly disassembled and assembled through the bolt and the threaded hole, which is easy to operate and suitable for popularization and application. At the same time, this method allows the bolt to be reliably and stably fixed to the heat sink 110 through the threaded hole, reducing the possibility of the first stopper 140 shaking during the operation of the print head 100. Therefore, it can reduce the possibility that the first stopper 140 and the heat sink 110 are not firmly fixed, causing the nozzle assembly 120 to shake relative to the heat sink 110, which is conducive to ensuring good printing quality and suitable for popularization and application.

[0098] In some possible embodiments provided by the present invention, the hole wall of the first through hole 114 is provided with a first limiting surface, the first limiting member 140 is a positioning pin, and the side wall of the positioning pin is provided with a second limiting surface matching the first limiting surface. Thus, the positioning pin can be quickly and conveniently passed through the first through hole 114 to achieve rapid disassembly and assembly with the heat sink 110, and the operation is convenient. At the same time, by cooperating with the first limiting surface on the hole wall of the first through hole 114 and the second limiting surface on the positioning pin, the possibility of the positioning pin rotating relative to the first through hole 114 is avoided. At the same time, since the elastic member 132 is pressed between the first limiting member 140 and the first arm 1313 of the pressing member 131, the positioning pin can be reliably and stably fixed on the heat sink 110, thereby reducing the possibility of the first limiting member 140 shaking during the operation of the print head 100 and reducing the possibility of the nozzle assembly 120 shaking relative to the heat sink 110 due to the first limiting member 140 and the heat sink 110 being not firmly fixed, which is beneficial to ensure good printing quality and is suitable for popularization and application.

[0099] Specifically, the first limiting surface and the second limiting surface may be at least one of a planar structure and a curved surface structure. Specifically, the first through hole 114 may be a D-shaped hole, and the first limiting member 140 may be a D-shaped positioning pin.

[0100] In some possible embodiments provided by the present invention, the second through hole 115 is a round hole, and the second limiting member 150 is a cylindrical pin, wherein the round hole is convenient for processing and has a low processing cost, and the cylindrical pin has a low manufacturing cost, and is suitable for popularization and application. In addition, the second limiting member 150 and the heat sink 110 can be quickly disassembled and assembled through the round hole and the cylindrical pin. This process does not require a screwing operation, but only requires a linear motion plugging and unplugging operation, which is easy to operate, greatly improving the disassembly and assembly efficiency of the second limiting member 150 and the heat sink 110, and is suitable for popularization and application.

[0101] like Figure 1 , Figure 4 , Figure 5 As shown, in some possible embodiments provided by the present invention, the second through hole 115 is a threaded hole, and the second limiting member 150 is a bolt. The threaded hole and the bolt can be used to quickly disassemble and assemble the second limiting member 150 and the heat sink 110, which is easy to operate and suitable for popularization and application.

[0102] It can be understood that since the second limit member 150 is usually used in the process of assembling the first limit member 140, the second limit member 150 is separated from the heat sink 110 during the normal operation of the print head 100. Therefore, whether the second limit member 150 is firmly connected to the heat sink 110 has no effect on the printing effect. Therefore, preferably, the second limit member 150 can be set as a cylindrical pin and the second through hole 115 can be set as a circular hole to greatly improve the disassembly and assembly efficiency of the second limit member 150 and the heat sink 110, so as to improve the overall assembly efficiency of the print head 100.

[0103] like Figure 1 , Figure 2 and Figure 3 As shown, in some possible embodiments provided by the present invention, the nozzle assembly 120 includes: a throat 121, a heating block 122 and a nozzle 123, a mounting hole is provided on the heating block 122, the first end of the throat 121 can be inserted into or detached from the first mounting space 111, the second end of the throat 121 is connected to the end of the mounting hole close to the heat dissipation block 110, and the nozzle 123 is connected to the end of the mounting hole away from the heat dissipation block 110; wherein the positioning portion 1211 includes an annular groove arranged on the peripheral side of the throat 121.

[0104] Thus, through the mounting hole, the connection between the throat 121 and the heating block 122, the connection between the nozzle 123 and the heating block 122 can be realized, and the assembly of the nozzle assembly 120 can be realized, which is simple to operate and convenient to disassemble. At the same time, the throat 121 and the nozzle 123 can be connected, so that the printing consumables can be provided to the nozzle 123 through the throat 121. Among them, through the first end of the throat 121, the throat 121 can be connected and disassembled with the heat sink 110, and then the nozzle assembly 120 and the heat sink 110 can be disassembled, which is simple to operate and convenient to use.

[0105] The heating block 122 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.

[0106] The heat sink 110 is located above the heating block 122 , which can prevent the heat generated by the heating block 122 from being conducted to the upper end of the throat 121 , causing the printing consumables to melt prematurely and block the throat 121 .

[0107] The positioning portion 1211 includes an annular groove arranged on the circumference of the throat 121 . The annular groove has a simple structure, is convenient to process, is easy to implement, and has a low processing cost.

[0108] It can be understood that the throat 121 is fixed to the heat sink 110 by cooperating with the clamping member 170 of the switching mechanism 130 and the positioning portion 1211, which can ensure that the throat 121 will not move axially along the first installation space 111, that is, the throat 121 will not separate from the first installation space 111 along the Z-axis direction. In some examples, the throat 121 can rotate relative to the first installation space 111.

[0109] The second aspect of the present invention provides a three-dimensional molding device, including: a guide frame and a print head 100 of any of the above embodiments, the print head 100 is mounted on the guide frame. Since the three-dimensional molding device includes the print head 100 of any of the above embodiments, it has all the technical effects of the above print head 100, which will not be repeated here.

[0110] Furthermore, the print head 100 further includes a connection base 160, which is connected to the heat sink 110, and the print head 100 can be connected and fixed to the guide frame through the connection base 160. Specifically, the connection base 160 can be detachably connected to the guide frame through at least one of a bolt structure, a clamping structure, a plug-in structure, and a mortise and tenon structure.

[0111] Furthermore, the three-dimensional molding device also includes a printing platform, and the print head 100 can be movably arranged on the 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 123 sprays the consumables onto the printing platform to realize the printing operation.

[0112] Specifically, Figures 1 to 6 As shown, the utility model also provides the following implementation modes:

[0113] Label 1, a print head 100, including: a mounting block, the mounting block is provided with a first mounting space 111, a second mounting space 112, and a channel 113 connecting the first mounting space 111 and the second mounting space 112; a connecting member, the connecting member is detachably connected to the mounting block through the first mounting space 111; a clamping member 170, the clamping member 170 is movably arranged in the channel 113; a switching mechanism 130, the switching mechanism 130 is at least partially located in the second mounting space 112, and the switching mechanism 130 includes a fixed position and a released position; in the fixed position, the switching mechanism 130 squeezes the clamping member 170, and the clamping member 170 presses against the connecting member to fix the connecting member, and in the released position, the clamping member 170 can at least move in the channel 113 to release the clamping member 170 from the connecting member.

[0114] Label 2, according to the print head 100 of label 1, a positioning portion 1211 that can be located in the first installation space 111 is provided on the connecting member; the clamping member 170 matches the shape of the positioning portion 1211; in a fixed position, the switching mechanism 130 squeezes the clamping member 170, and the clamping member 170 presses against the positioning portion 1211 to clamp the connecting member; the first installation space 111 includes a first installation hole, and the second installation space 112 includes a second installation hole.

[0115] Reference numeral 3, according to the print head 100 of reference numeral 1, the switching mechanism 130 includes a pressing member 131 and an elastic member 132, at least a portion of the pressing member 131 is slidably disposed in the second mounting space 112, and includes a release position and a fixed position relative to the mounting block, the elastic member 132 is located between the pressing member 131 and the mounting block to generate a force that switches the pressing member 131 from the release position to the fixed position, and a limiting groove 1311 is provided on one side of the pressing member 131 facing the channel 113;

[0116] Among them, in the release position, the elastic member 132 is compressed, and the limit groove 1311 and the channel 113 are connected, so that the locking member 170 can move between the limit groove 1311 and the channel 113. In the fixed position, the limit groove 1311 and the channel 113 are misaligned so that part of the locking member 170 extends into the first installation space 111; the locking member 170 includes a locking bead.

[0117] Label 4, according to the print head 100 of label 3, the side wall of the pressing member 131 close to the channel 113 is provided with a guide groove 1312 connected with the limiting groove 1311, and the bottom of the guide groove 1312 is set to be an ascending wedge shape from the side close to the limiting groove 1311 to the side away from the limiting groove 1311. When the pressing member 131 is in a fixed position, the guide groove 1312 is isolated from the channel 113.

[0118] Reference numeral 5 , according to the print head 100 of reference numeral 3 , the channel 113 comprises a port 1131 communicating with the first installation space 111 , and a diameter of the port 1131 is smaller than a diameter of the clamping member 170 .

[0119] No. 6, according to the print head 100 of No. 3, the print head 100 also includes: a first limiting member 140, a mounting block is provided with a first through hole 114 connected to the second mounting space 112, a first arm 1313 and a second arm 1314 are arranged at intervals along the sliding direction of the pressing member 131 on one side of the pressing member 131 facing the first through hole 114, the first limiting member 140 is detachably connected to the mounting block through the first through hole 114, and the first limiting member 140 can extend between the first arm 1313 and the second arm 1314; the elastic member 132 is located between the first arm 1313 and the second arm 1314, and the two ends of the elastic member 132 are used to contact the first arm 1313 and the first limiting member 140 respectively; the dimension of the first limiting member 140 located in the second mounting space 112 along the sliding direction of the pressing member 131 is greater than the gap width between the elastic member 132 and the second arm 1314 in a free state.

[0120] Label 7, according to the print head 100 of label 6, the print head 100 also includes: a second limit member 150, the mounting block is provided with a second through hole 115 connected to the second mounting space 112, the second through hole 115 is located on the side of the first through hole 114 close to the first support arm 1313, the second limit member 150 is detachably connected to the mounting block through the second through hole 115 and can extend into the second mounting space 112; wherein, the second limit member 150 located in the second mounting space 112 has a dimension along the sliding direction of the pressing member 131 that is smaller than the gap width between the elastic member 132 and the second support arm 1314 in a free state.

[0121] Label 8, according to the print head 100 of label 7, a side of the first arm 1313 facing the second through hole 115 is provided with an avoidance groove 1315 flush with the second through hole 115, and the avoidance groove 1315 extends along the sliding direction of the pressing member 131, and the shape of the avoidance groove 1315 matches the shape of the end of the second limiting member 150 located in the second installation space 112.

[0122] Label 9, according to the print head 100 of label 7, the first through hole 114 is a threaded hole, and the first limiting member 140 is a bolt; or, the hole wall of the first through hole 114 is provided with a first limiting surface, the first limiting member 140 is a positioning pin, and the side wall of the positioning pin is provided with a second limiting surface matching the first limiting surface; or, the second through hole 115 is a round hole, and the second limiting member 150 is a cylindrical pin; or, the second through hole 115 is a threaded hole, and the second limiting member 150 is a bolt.

[0123] Reference numeral 10, according to the print head 100 of reference numeral 5, the mounting block includes a heat sink 110, and the connecting member includes a nozzle assembly 120; or,

[0124] The mounting block includes a heating block 122 , a nozzle 123 is provided on the heating block 122 , and the connecting piece includes a throat 121 .

[0125] Label 11, according to the print head 100 of label 10, the nozzle assembly 120 includes: a throat 121, a heating block 122 and a nozzle 123, the heating block 122 is provided with a mounting hole, the first end of the throat 121 can be inserted into or detached from the first mounting space 111, the second end of the throat 121 is connected to the end of the mounting hole close to the heat sink 110, and the nozzle 123 is connected to the end of the mounting hole away from the heat sink 110; wherein, the positioning portion 1211 includes an annular groove arranged on the peripheral side of the throat 121.

[0126] Furthermore, the present invention also provides the following implementation modes:

[0127] Label 12. A three-dimensional molding device, comprising: a guide frame and a print head 100 as any one of labels 1 to 11, wherein the print head 100 is mounted on the guide frame.

[0128] 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.

[0129] 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 mounting block, wherein the mounting block is provided with a first mounting space, a second mounting space, and a passage connecting the first mounting space and the second mounting space; a connecting member, the connecting member being detachably connected to the mounting block through the first mounting space; A clamping member, the clamping member being movably disposed in the passage; A switching mechanism, wherein the switching mechanism is at least partially located in the second installation space, and the switching mechanism includes a fixed position and a released position; in the fixed position, the switching mechanism squeezes the clamping member, and the clamping member presses against the connecting member to fix the connecting member; in the released position, the clamping member can at least move in the channel to allow the clamping member to release the connecting member.

2. The print head according to claim 1, characterized in that: The connecting member is provided with a positioning portion which can be located in the first installation space; The shape of the clamping member matches that of the positioning portion; In the fixed position, the switching mechanism presses the clamping member, and the clamping member abuts against the positioning portion to clamp the connecting member; The first installation space includes a first installation hole, and the second installation space includes a second installation hole.

3. The print head according to claim 2, characterized in that: The switching mechanism includes a pressing member and an elastic member, at least a portion of the pressing member is slidably disposed in the second installation space, and includes a release position and a fixed position relative to the installation block, the elastic member is located between the pressing member and the installation block to generate a force that switches the pressing member from the release position to the fixed position, and the pressing member is provided with a limiting groove on one side of the channel; Among them, in the release position, the elastic member is compressed, the limit groove and the channel are connected, so that the locking member can move between the limit groove and the channel, and in the fixed position, the limit groove and the channel are misaligned so that part of the locking member extends into the first installation space; the locking member includes a locking bead.

4. The print head according to claim 3, characterized in that: The side wall of the pressing member close to the channel is provided with a guide groove connected with the limiting groove, and the bottom of the guide groove is arranged in a rising wedge shape from a side close to the limiting groove to a side away from the limiting groove. When the pressing member is in the fixed position, the guide groove is isolated from the channel.

5. The print head according to claim 3, characterized in that: The channel includes a port communicating with the first installation space, and a diameter of the port is smaller than a diameter of the clamping member.

6. The print head according to claim 3, characterized in that: The print head also includes: a first limiting member, wherein the mounting block is provided with a first through hole communicating with the second mounting space, a first support arm and a second support arm are spaced apart from each other on one side of the pressing member facing the first through hole along a sliding direction of the pressing member, the first limiting member is detachably connected to the mounting block through the first through hole, and the first limiting member can extend between the first support arm and the second support arm; The elastic member is located between the first support arm and the second support arm, and two ends of the elastic member are used to contact the first support arm and the first limiting member respectively; The dimension of the first limiting member located in the second installation space along the sliding direction of the pressing member is greater than the width of the gap between the elastic member and the second supporting arm in a free state.

7. The print head according to claim 6, characterized in that: The print head also includes: a second limiting member, wherein the mounting block is provided with a second through hole communicating with the second mounting space, the second through hole being located on a side of the first through hole close to the first arm, the second limiting member being detachably connected to the mounting block through the second through hole and being extendable into the second mounting space; Wherein, a dimension of the second position-limiting member located in the second installation space along the sliding direction of the pressing member is smaller than a width of a gap between the elastic member and the second support arm in a free state.

8. The print head according to claim 7, characterized in that: A avoidance groove flush with the second through hole is formed on one side of the first arm facing the second through hole, the avoidance groove extends along the sliding direction of the pressing member, and the shape of the avoidance groove matches the shape of the end of the second limiting member located in the second installation space.

9. The print head according to claim 7, characterized in that: The first through hole is a threaded hole, and the first limiting member is a bolt; or, The hole wall of the first through hole is provided with a first limiting surface, the first limiting member is a positioning pin, and the side wall of the positioning pin is provided with a second limiting surface matching the first limiting surface; or, The second through hole is a round hole, and the second limiting member is a cylindrical pin; or, The second through hole is a threaded hole, and the second limiting member is a bolt.

10. The print head according to claim 2, characterized in that: The mounting block includes a heat sink, and the connecting member includes a nozzle assembly; or, The mounting block comprises a heating block, a nozzle is arranged on the heating block, and the connecting piece comprises a throat.

11. The print head according to claim 10, characterized in that: If the connecting member includes a nozzle assembly, the nozzle assembly includes: A throat, a heating block and a nozzle, wherein the heating block is provided with a mounting hole, the first end of the throat can be inserted into or out of the first mounting space, the second end of the throat is connected to an end of the mounting hole close to the heat dissipation block, and the nozzle is connected to an end of the mounting hole away from the heat dissipation block; Wherein, the positioning portion includes an annular groove arranged on the circumference of the throat.

12. 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 11, wherein the print head is mounted on the guide frame.

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