Printing head and three-dimensional printer

Abstract

The utility model discloses a printing head and a three-dimensional printer, relates to the technical field of three-dimensional printing equipment, and mainly aims to improve the disassembly and assembly convenience of a spray head assembly on the printing head so as to improve the working efficiency. The main technical scheme of the utility model is that the printing head comprises a heat dissipation piece; a nozzle assembly; the locking piece is used for moving relative to the heat dissipation piece so as to be switched between a locking state and an unlocking state; in the locking state, the locking piece locks the spray head assembly to the heat dissipation piece; and in the unlocking state, the locking piece unlocks the spray head assembly to the heat dissipation piece.

Description

Technical Field

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

[0002] In recent years, 3D printers have developed rapidly. As a key component of 3D printers, the print head is responsible for printing the printing material to the designated location according to the designed pattern.

[0003] The print head usually includes a nozzle assembly for ejecting printing materials, and the nozzle assembly is usually a fragile structure. In order to ensure the printing effect of the print head, the nozzle assembly may need to be frequently disassembled for replacement and maintenance. The patent with publication number CN116198111 A discloses a high-temperature melt extrusion continuous fiber / resin double nozzle quick-change 3D print head, and specifically discloses that the 3D print head includes a water-cooled heat sink for fixing and cooling the throat, and the water-cooled heat sink clamps the throat by tightening screws or top screws, that is, the heat sink of the print head in the prior art fixes the throat of the nozzle assembly by screws or top screws.

[0004] When the nozzle assembly needs to be disassembled, the screws or jackscrews need to be screwed with the aid of tools to achieve the disassembly and assembly of the throat pipe and the heat sink, thereby achieving the disassembly and assembly of the nozzle assembly, which is complicated to operate and reduces work efficiency. Utility Model Content

[0005] In view of this, the embodiments of the present utility model provide a print head and a three-dimensional printer, the main purpose of which is to improve the convenience of disassembly and assembly of the nozzle assembly on the print head to improve work efficiency.

[0006] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0007] On the one hand, an embodiment of the utility model provides a print head, comprising:

[0008] Heat sink;

[0009] Nozzle assembly;

[0010] A locking member, the locking member being used to move relative to the heat sink to switch between a locked state and an unlocked state;

[0011] In the locked state, the locking member locks the nozzle assembly to the heat sink; in the unlocked state, the locking member unlocks the nozzle assembly to the heat sink.

[0012] Further, the locking member is movably disposed on the heat sink; the locking member includes a first abutting portion;

[0013] The heat sink is provided with a mounting channel;

[0014] The nozzle assembly comprises a throat pipe, the throat pipe is pluggable and inserted into the installation channel, and a second abutment portion is provided on the throat pipe;

[0015] In the locked state, the first abutting portion abuts against the second abutting portion to limit the throat in the installation channel; in the unlocked state, the first abutting portion is separated from the second abutting portion to allow the throat to be detached from the installation channel.

[0016] Furthermore, a convex edge is provided on the outer peripheral wall of the throat pipe, and the convex edge extends along the circumference of the throat pipe; the convex edge is located on a side opposite to the heat sink, and includes the second abutting portion.

[0017] Further, the locking member includes a wire spring, the wire spring is rotatably disposed on the heat sink, the wire spring is used to rotate relative to the heat sink to switch between the locked state and the unlocked state, and the wire spring includes the first abutment portion.

[0018] Further, the wire spring includes a bent section;

[0019] In the locked state, the curved section abuts against the second abutting portion, so that the throat is limited in the installation channel; in the unlocked state, the curved section is separated from the second abutting portion, so that the throat can be separated from the installation channel;

[0020] The bent section is the first abutting portion.

[0021] Furthermore, a limiting member is provided on the heat sink;

[0022] The wire spring comprises a limiting section, and the limiting section is connected to the bending section;

[0023] The limiting section is used to limit the position of the limiting member so that the wire spring is in the locked state.

[0024] Further, the limiting member includes a protrusion, and the protrusion is arranged on an end surface of the heat sink that is away from the nozzle assembly;

[0025] The limiting section is used to be engaged with one side of the protrusion.

[0026] Furthermore, the wire spring also includes a gripping section, wherein the gripping section is connected between the bending section and the limiting section, and the gripping section is used for being held by a user.

[0027] Further, in the locked state, the gripping section is at least partially away from the heat sink;

[0028] The maximum distance between the gripping section and the heat sink is greater than or equal to 3 mm.

[0029] Furthermore, a receiving groove is provided on an end surface of the heat sink close to the nozzle assembly, and the receiving groove is communicated with the installation channel;

[0030] The curved section is disposed in the receiving groove and is capable of rotating in the receiving groove;

[0031] In the locked state, the second abutting portion is located in the accommodating groove.

[0032] Further, a first through hole communicating with the containing groove is formed on one side of the heat sink, and a second hole communicating with the containing groove is formed on the other side of the heat sink, and the first through hole is a long strip hole;

[0033] The wire spring is rotatably inserted into the first through hole and the second hole;

[0034] The wire spring is also used to rotate relative to the heat sink between an installation position and a removal position; in the installation position, the bent section is staggered from the first through hole, and the bent section is limited in the receiving groove; in the removal position, the bent section corresponds to the first through hole, and the bent section can be moved out of the receiving groove through the first through hole;

[0035] In the locked state, the wire spring is in the installed position.

[0036] Further, the installation channel is tapered, and the cross-sectional area of ​​the installation channel gradually decreases along the direction in which the throat is inserted into the installation channel;

[0037] The shape of the throat matches the shape of the mounting channel;

[0038] In the locked state, the outer wall surface of the throat is tightly fitted with the inner wall surface of the installation channel.

[0039] Furthermore, the nozzle assembly further includes a first terminal;

[0040] The print head further includes a second terminal, and the first terminal and the second terminal are detachably connected; when the first terminal and the second terminal are connected, the first terminal and the second terminal are electrically connected.

[0041] On the other hand, an embodiment of the present invention further provides a three-dimensional printer, comprising the aforementioned print head.

[0042] By means of the above technical solution, the utility model has at least the following beneficial effects:

[0043] The technical solution provided by the embodiment of the utility model is that the locking piece moves relative to the heat sink, and the locking piece has a locked state and an unlocked state. When it is necessary to install the nozzle assembly, the locking piece can be moved to the locked state so that the locking piece locks the nozzle assembly on the heat sink, thereby realizing the installation of the nozzle assembly on the heat sink; when it is necessary to remove the nozzle assembly, the locking piece can be moved to the unlocked state so that the locking piece unlocks the nozzle assembly from the heat sink, thereby realizing the removal of the nozzle assembly from the heat sink. The disassembly and assembly of the nozzle assembly does not require the aid of tools, and the operation is simple and convenient, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic diagram of the structure of a print head provided by an embodiment of the utility model;

[0045] Figure 2 A cross-sectional schematic diagram of a heat sink and a nozzle assembly connected to each other provided in an embodiment of the utility model;

[0046] Figure 3 A schematic diagram of the structure of a heat sink in a print head provided by an embodiment of the utility model;

[0047] Figure 4 A schematic diagram of a structure in which a heat sink and a locking member are connected in a print head provided by an embodiment of the utility model and the structure is in a first viewing angle;

[0048] Figure 5 A schematic diagram of a structure in which a heat sink and a locking member are connected in a print head provided by an embodiment of the utility model and are at a second viewing angle;

[0049] Figure 6 A cross-sectional schematic diagram of the connection between a heat sink and a locking member in a print head provided by an embodiment of the utility model;

[0050] Figure 7 A schematic diagram of the structure of a nozzle assembly in a print head provided by an embodiment of the utility model;

[0051] Figure 8 A schematic diagram of the structure of a locking member in a print head provided by an embodiment of the utility model;

[0052] Fig. 9 A partial cross-sectional schematic diagram of a print head provided by an embodiment of the utility model;

[0053] Fig.10 A partial cross-sectional schematic diagram of another print head provided in an embodiment of the utility model.

[0054] Description of reference numerals:

[0055] 1-heat sink; 11-installation channel; 12-protrusion; 13-accommodation groove; 14-first through hole; 15-second hole; 2-spray head assembly; 21-throat; 211-convex edge; 3-wire spring; 31-bending section; 32-limiting section; 33-gripping section. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be described in more detail below in conjunction with the accompanying drawings in the preferred embodiments of the present invention.

[0057] like Figure 1 As shown, the embodiment of the utility model provides a print head, including a heat sink 1; a nozzle assembly 2; a locking member, the locking member is used to move relative to the heat sink 1 to switch between a locked state and an unlocked state; in the locked state, the locking member locks the nozzle assembly 2 to the heat sink 1; in the unlocked state, the locking member unlocks the nozzle assembly 2 from the heat sink 1. The locking member is movably arranged on the heat sink 1. When switching between the locked state and the unlocked state, the locking member can still be arranged on the heat sink 1, and the locking member can be removed from the heat sink 1 only when needed.

[0058] The print head provided by the embodiment of the utility model moves relative to the heat sink 1 through a locking piece, and the locking piece has a locked state and an unlocked state. When it is necessary to install the nozzle assembly 2, the locking piece can be moved to the locked state so that the locking piece locks the nozzle assembly 2 on the heat sink 1, thereby realizing the installation of the nozzle assembly 2 on the heat sink 1; when it is necessary to remove the nozzle assembly 2, the locking piece can be moved to the unlocked state so that the locking piece unlocks the nozzle assembly 2 from the heat sink 1, thereby realizing the removal of the nozzle assembly 2 from the heat sink 1. The disassembly and assembly operation of the nozzle assembly 2 does not require the aid of tools, and the operation is simple and convenient, thereby improving work efficiency.

[0059] Among them, the nozzle assembly 2 includes a first terminal, and the print head also includes a second terminal. The first terminal and the second terminal are detachably connected. When the first terminal and the second terminal are connected, an electrical connection is achieved between the first terminal and the second terminal. Therefore, when the nozzle assembly 2 is disassembled, the first terminal and the second terminal are disassembled to achieve a quick connection between the two.

[0060] Specifically, the first terminal can be electrically connected to the heating block and temperature sensor of the nozzle assembly 2, respectively. The heating block can be used to heat the consumables, and the temperature sensor can be used to detect the temperature of the heating block. When the nozzle assembly 2 is locked on the heat sink 1, the first terminal and the second terminal are electrically connected, and the heating block and the temperature sensor and other devices can be powered on and start working. When the nozzle assembly 2 is unlocked from the heat sink 1, the first terminal and the second terminal are separated, and the heating block and the temperature sensor and other devices stop working. It can be understood that the first terminal can include a plurality of wiring terminals, and the plurality of wiring terminals can correspond to electrically connect different devices such as the heating block and the temperature sensor, or the first terminal can include a plurality of wires, and the plurality of wires can correspond to electrically connect different devices such as the heating block and the temperature sensor, so that when the first terminal and the second terminal are electrically connected, each device can start working. When the nozzle assembly 2 is locked on the heat sink 1, the first terminal and the second terminal can be directly aligned and connected, and the user can manually connect the first terminal and the second terminal.

[0061] In some embodiments, see Figure 2 , Figure 6 and Figure 7 The locking member may include a first abutment portion; a mounting channel 11 is provided on the heat sink 1; the nozzle assembly 2 includes a throat 21, which is pluggable in the mounting channel 11, and a second abutment portion may be provided on the throat 21; in the locked state, the first abutment portion abuts against the second abutment portion to limit the throat 21 in the mounting channel 11; in the unlocked state, the first abutment portion is separated from the second abutment portion to allow the throat 21 to be detached from the mounting channel 11.

[0062] Among them, in the locked state, the first abutment portion of the locking member abuts against the second abutment portion on the throat 21, that is, the first abutment portion can apply a thrust to the throat 21 through the second abutment portion, and the direction of the thrust is the insertion direction of the throat 21 into the installation channel 11. The thrust can drive the throat 21 to always remain inserted in the installation channel 11 to prevent the throat 21 from slipping out of the installation channel 11, thereby achieving the fixation of the throat 21 in the installation channel 11, and then achieving the installation of the nozzle assembly 2 on the heat sink 1; in the unlocked state, the first abutment portion is separated from the second abutment portion, and the second abutment portion loses the thrust provided by the first abutment portion, so that the throat 21 can be separated from the installation channel 11, thereby achieving the removal of the nozzle assembly 2 from the heat sink 1, with a simple structure and reliable use.

[0063] It is understandable that the specific structural form of the locking member can be various, as long as it can realize movement relative to the heat sink 1 to lock or unlock the nozzle assembly 2. For example, the locking member can include two locking plates, which are slidably arranged on both sides of the heat sink 1, and the two locking plates can slide relative to each other and can extend into the installation channel 11. In addition, the nozzle assembly 2 can include a throat 21, and a slot corresponding to the locking plate can be arranged on the outer peripheral wall of the throat 21. When the nozzle assembly 2 needs to be installed, the two locking plates can be relatively slid so that the two locking plates are close to each other and are engaged in the corresponding slots, thereby locking the throat 21 in the installation channel 11, thereby realizing the installation of the nozzle assembly 2 on the heat sink 1; when the nozzle assembly 2 needs to be disassembled, the two locking plates can be slid in the opposite direction so that the two locking plates are separated from each other to disengage from the slots, thereby unlocking the throat 21 from the installation channel 11, thereby realizing the disassembly of the nozzle assembly 2 and the heat sink 1.

[0064] The outer peripheral wall of the throat 21 may be provided with a convex edge 211, which extends along the circumference of the throat 21; the convex edge 211 is opposite to the heat sink 1 and includes the second abutment portion. For example, the second abutment portion may be the surface of the convex edge 211 opposite to the heat sink 1.

[0065] In the locked state, the first abutting portion abuts against the convex edge 211 to limit the throat 21 in the installation channel 11; in the unlocked state, the first abutting portion is separated from the convex edge 211 to allow the throat 21 to be separated from the installation channel 11.

[0066] To further facilitate operation, in some embodiments, see Figure 2 , Figures 6 to 10 The locking member may include a wire spring 3, and the wire spring 3 is rotatably disposed on the heat sink 1, and the wire spring 3 is used to rotate relative to the heat sink 1 to switch between a locked state and an unlocked state, and the wire spring 3 includes a first abutment portion.

[0067] Specifically, the wire spring 3 may be a metal piece with elasticity, and the shape of the wire spring 3 may be a curved wire. The specific shape of the wire spring 3 is defined according to needs.

[0068] In some embodiments, the wire spring 3 may include a bent section 31; in a locked state, the bent section 31 abuts against the second abutting portion, specifically, the bent section 31 may abut against the flange 211, so that the throat 21 is limited in the mounting channel 11; in an unlocked state, the bent section 31 is separated from the second abutting portion, specifically, the bent section 31 is separated from the flange 211, so that the throat 21 can be separated from the mounting channel 11; specifically, the bent section 31 can be the aforementioned first abutting portion.

[0069] The bent section 31 is the portion of the wire spring 3 that needs to abut against the second abutting portion of the throat 21 .

[0070] When the nozzle assembly 2 needs to be installed, the wire spring 3 can be rotated to a locked state so that the curved section 31 of the wire spring 3 abuts against the convex edge 211 of the throat 21, thereby applying a thrust for inserting the throat 21 into the installation channel 11 through the convex edge 211, thereby fixing the throat 21 in the installation channel 11; when the nozzle assembly 2 needs to be disassembled, the wire spring 3 can be rotated to an unlocked state so that the curved section 31 is separated from the convex edge 211, and the convex edge 211 removes the thrust provided by the curved section 31, thereby allowing the throat 21 to be detached from the installation channel 11. The structure is simple, the operation is convenient, the use is reliable, and the cost is low.

[0071] It should be noted that the bending height of the bending section 31 relative to other positions of the wire spring 3 can be determined according to the surface area of ​​the convex edge 211 , as long as the bending section 31 can stably abut against the surface of the convex edge 211 .

[0072] In some embodiments, see Figure 1 , Figure 3 , Figure 4 and Figure 8 A limiting member may be provided on the heat sink 1; the wire spring 3 may include a limiting section 32, which is connected to the bending section 31; the limiting section 32 is used to limit the limiting member so that the wire spring 3 is in a locked state.

[0073] In the above embodiment, after the wire spring 3 is rotated to the locked state, the limiting section 32 of the wire spring 3 can be limited on the limiting member to fix the wire spring 3 in the locked state, thereby achieving stable installation of the nozzle assembly 2 and the heat sink 1.

[0074] There may be various structural forms of the limiting member, as long as it can limit the limiting section 32 .

[0075] In some embodiments, see Figure 1 , Figure 3 and Figure 4 The limiting member may include a protrusion 12 , which is arranged on the end surface of the heat sink 1 away from the nozzle assembly 2 ; the limiting section 32 is used to be engaged with one side of the protrusion 12 .

[0076] In the above embodiment, the limiting section 32 is a part of the wire spring 3, and the limiting section 32 can be a free end section of the wire spring 3. After the wire spring 3 is rotated to the locked state, the wire spring 3 can continue to be rotated. Since the wire spring 3 is elastic, the limiting section 32 of the wire spring 3 can be bent to the position of the protrusion 12 on the heat sink 1, and the limiting section 32 is clamped on one side of the protrusion 12 to fix the position of the wire spring 3 and maintain the stable assembly between the nozzle assembly 2 and the heat sink 1. At this point, the installation operation of the nozzle assembly 2 on the heat sink 1 is completed. Among them, when the limiting section 32 is clamped on one side of the protrusion 12, the wire spring 3 can be stretched, that is, the wire spring 3 has a force to restore its original state, so that the position of the wire spring 3 is not easy to move. In other embodiments, the limiting member can also be a groove, so that the limiting section 32 is clamped in the limiting member.

[0077] Specifically, the specific structural shape of the limiting section 32 is not limited in this application, as long as it can be stably engaged with one side of the protrusion 12. For example, the limiting section 32 can be a section formed by bending the free end of the wire spring 3 relative to other parts of the wire spring 3.

[0078] It should be noted that, by limiting the limiting section 32 of the wire spring 3 at the end of the heat sink 1 facing away from the nozzle assembly 2, on the one hand, due to the elasticity of the wire spring 3, the limiting effect of the protrusion 12 on the limiting section 32 can increase the thrust applied by the curved section 31 to the convex edge 211 on the throat 21, thereby further improving the installation stability between the nozzle assembly 2 and the heat sink 1; on the other hand, it can prevent the free end of the wire spring 3 from extending out and affecting the normal printing operation of the print head.

[0079] Of course, by separating the limiting section 32 from the protrusion 12 , the wire spring 3 can be rotated, so that the wire spring 3 can be switched between the locked state and the unlocked state.

[0080] To further facilitate operation, in some embodiments, see Figure 4 and Figure 8 The wire spring 3 may further include a gripping section 33 , which is connected between the bending section 31 and the limiting section 32 , and is used for a user to hold the gripping section 33 .

[0081] During the process of disassembling and assembling the nozzle assembly 2, the operator can hold the gripping section 33 to rotate and limit the wire spring 3, which is more convenient. Specifically, the specific structural shape of the gripping section 33 is not limited in this application, as long as it can be convenient for the user to hold. For example, the gripping section 33 can be a section formed by bending the wire spring 3 between the limiting section 32 and the bending section 31.

[0082] In the locked state, the grip section 33 is at least partially away from the heat sink 1; the maximum distance between the grip section 33 and the heat sink 1 is greater than or equal to 3 mm. If the maximum distance between the grip section 33 and the heat sink 1 is less than 3 mm, the grip section 33 is too close to the heat sink 1 and is difficult to hold.

[0083] In some embodiments, see Figure 3 , Figure 6 , Fig. 9 and Fig.10 The heat sink 1 may be provided with a receiving groove 13 on one end surface close to the nozzle assembly 2, and the receiving groove 13 is connected to the installation channel 11; the curved section 31 may be arranged in the receiving groove 13 and can rotate in the receiving groove 13; in the locked state, the second abutting portion is located in the receiving groove 13, specifically, the convex edge 211 is located in the receiving groove 13, so that the convex edge 211 abuts against the curved section 31. The other side of the convex edge 211 can be used to abut against the heat sink 1, so that the throat 21 is clamped and fixed.

[0084] In the above embodiment, the accommodating groove 13 can provide a movable space for the bending section 31 to switch between the locked state and the unlocked state, thereby achieving the goal of not occupying additional space of the print head, avoiding increasing the volume of the print head, and facilitating the miniaturization of the print head.

[0085] In some embodiments, see Figure 3 , Figure 4 and Figure 5 , a first through hole 14 communicating with the receiving groove 13 is provided on one side of the heat sink 1, and a second hole 15 communicating with the receiving groove 13 is provided on the other side of the heat sink 1, that is, the first through hole 14 and the second hole 15 are provided on the groove walls on both sides of the receiving groove 13; the wire spring 3 is rotatably inserted into the first through hole 14 and the second hole 15; the first through hole 14 is a long strip hole; the wire spring 3 is also used to rotate between the installation position and the removal position relative to the heat sink 1; in the installation position, the bending section 31 is staggered with the first through hole 14, and the bending section 31 is limited in the receiving groove 13; in the removal position, the bending section 31 corresponds to the first through hole 14, and the bending section 31 can be moved out of the receiving groove 13 through the first through hole 14; and in the locked state, the wire spring 3 is in the installation position. Among them, the second hole 15 can be a through hole or a blind hole, as long as the rotatable insertion of the wire spring 3 can be achieved.

[0086] In the above embodiment, the first through hole 14 can be extended along the length direction of the installation channel 11 and arranged on the heat sink 1, and the second hole 15 can be a through hole adapted to the shape of the wire spring 3, such as a circular through hole. When the wire spring 3 is in the installation position, the bent section 31 can be staggered with the first through hole 14, for example, the installation section can be arranged horizontally or obliquely relative to the first through hole 14, so that the bent section 31 cannot be separated from the receiving groove 13 through the first through hole 14, so that the wire spring 3 will not fall off due to abnormal conditions such as external force, thereby ensuring reliable installation between the nozzle assembly 2 and the heat sink 1; when the wire spring 3 needs to be disassembled, the wire spring 3 can be rotated to the disassembly position, in which the bent section 31 can correspond to the first through hole 14, so that the bent section 31 can pass through the first through hole 14, so that the wire spring 3 can be separated from the receiving groove 13 through the first through hole 14, and the wire spring 3 can be disassembled from the heat sink 1, which is more reliable to use.

[0087] Of course, when installing the wire spring 3 on the heat sink 1, one end of the wire spring 3 can be inserted into the first through hole 14 first, and then the wire spring 3 can be rotated to make the wire spring 3 in the disassembly position, that is, the bent section 31 is kept corresponding to the first through hole 14, and then the bent section 31 can be sent into the receiving groove 13 through the first through hole 14. At the same time, one end of the wire spring 3 is inserted into the second hole 15, and the installation of the wire spring 3 on the heat sink 1 is completed. The wire spring 3 is rotated again to be out of the disassembly position, so that the wire spring 3 can be prevented from being separated from the heat sink 1.

[0088] In some embodiments, see Figure 2 , Figure 6 and Figure 7 The mounting channel 11 may be tapered, and the cross-sectional area of ​​the mounting channel 11 gradually decreases along the direction in which the throat 21 is inserted into the mounting channel 11; the shape of the throat 21 matches the shape of the mounting channel 11, that is, the shape of the throat 21 may also be tapered, and in the locked state, the outer wall surface of the throat 21 fits tightly with the inner wall surface of the mounting channel 11.

[0089] In the above embodiment, by setting the installation channel 11 and the throat 21 to match through the conical surface, when the curved portion of the wire spring 3 abuts against the convex edge 211 of the throat 21, so that the wire spring 3 applies a thrust to the throat 21 through the convex edge 211, the outer wall surface of the throat 21 can be tightly fitted with the inner wall surface of the installation channel 11, which can increase the contact area between the throat 21 and the heat sink 1, increase the heat transfer efficiency between the throat 21 and the heat sink 1, and thus improve the heat dissipation effect of the heat sink 1 on the throat 21. It can be understood that if the outer wall surface of the throat 21 is tightly fitted with the inner wall surface of the installation channel 11, one side of the convex edge 211 may not abut against the heat sink 1, or may abut against the heat sink 1, and this is not limited in the present application.

[0090] Alternatively, in some embodiments, the mounting channel 11 may also be cylindrical; the shape of the throat 21 may be cylindrical to match the shape of the mounting channel 11; in the locked state, the outer wall surface of the throat 21 may also achieve the purpose of tightly fitting with the inner wall surface of the mounting channel 11.

[0091] An embodiment of the utility model further provides a three-dimensional printer, comprising the print head of any of the aforementioned embodiments.

[0092] The three-dimensional printer provided by the embodiment of the utility model includes the aforementioned print head, and therefore, the three-dimensional printer has all the beneficial effects of the print head, which will not be described in detail here.

[0093] Label 1. A print head, comprising:

[0094] Heat sink 1;

[0095] Nozzle assembly 2;

[0096] A locking member, the locking member is used to move relative to the heat sink 1 to switch between a locked state and an unlocked state;

[0097] In the locked state, the locking member locks the nozzle assembly 2 to the heat sink 1 ; in the unlocked state, the locking member unlocks the nozzle assembly 2 to the heat sink 1 .

[0098] Reference numeral 2, a print head based on reference numeral 1, wherein the locking member is movably disposed on the heat sink 1;

[0099] The locking member includes a first abutment portion;

[0100] The heat sink 1 is provided with a mounting channel 11;

[0101] The nozzle assembly 2 includes a throat pipe 21, which is pluggable in the installation channel 11, and a second abutment portion is provided on the throat pipe 21;

[0102] In the locked state, the first abutting portion abuts against the second abutting portion to limit the throat 21 in the installation channel 11 ; in the unlocked state, the first abutting portion is separated from the second abutting portion to allow the throat 21 to be separated from the installation channel 11 .

[0103] Reference numeral 3 is a print head based on reference numeral 2, wherein a convex edge 211 is provided on the outer peripheral wall of the throat 21, and the convex edge 211 extends along the circumference of the throat 21; the convex edge 211 is opposite to the side of the heat sink 1, and includes a second abutting portion.

[0104] No. 4, a print head based on No. 2,

[0105] The locking member includes a wire spring 3 rotatably disposed on the heat sink 1 . The wire spring 3 is used to rotate relative to the heat sink 1 to switch between a locked state and an unlocked state. The wire spring 3 includes a first abutting portion.

[0106] No. 5, a print head based on No. 4,

[0107] The wire spring 3 includes a bent section 31;

[0108] In the locked state, the curved section 31 abuts against the second abutting portion, so that the throat 21 is limited in the installation channel 11; in the unlocked state, the curved section 31 is separated from the second abutting portion, so that the throat 21 can be separated from the installation channel 11;

[0109] The bent section 31 is a first abutting portion.

[0110] No. 6, a print head based on No. 5,

[0111] A limiting member is provided on the heat sink 1;

[0112] The wire spring 3 includes a limiting section 32, and the limiting section 32 is connected to the bending section 31;

[0113] The limiting section 32 is used to be limited at the limiting member so that the wire spring 3 is in a locked state.

[0114] No. 7, a print head based on No. 6,

[0115] The limiting member includes a protrusion 12, and the protrusion 12 is arranged on the end surface of the heat sink 1 away from the nozzle assembly 2;

[0116] The limiting section 32 is used to be engaged with one side of the protrusion 12 .

[0117] No. 8, a print head based on No. 6,

[0118] The wire spring 3 further includes a gripping section 33 , which is connected between the bending section 31 and the limiting section 32 , and is used for being held by a user.

[0119] Reference numeral 9, a print head based on reference numeral 8, wherein in a locked state, the gripping section 33 is at least partially away from the heat sink 1;

[0120] The maximum distance between the grip section 33 and the heat sink 1 is greater than or equal to 3 mm.

[0121] Reference numeral 10, a print head based on reference numeral 5,

[0122] A receiving groove 13 is formed on one end surface of the heat sink 1 close to the nozzle assembly 2, and the receiving groove 13 is communicated with the installation channel 11;

[0123] The curved section 31 is disposed in the receiving groove 13 and can rotate in the receiving groove 13;

[0124] In the locked state, the second abutting portion is located in the receiving groove 13 .

[0125] Reference numeral 11, a print head based on reference numeral 9,

[0126] A first through hole 14 communicating with the accommodating groove 13 is formed on one side of the heat dissipation element 1, and a second hole 15 communicating with the accommodating groove 13 is formed on the other side of the heat dissipation element 1. The first through hole 14 is a long strip-shaped hole.

[0127] The wire spring 3 is rotatably inserted into the first through hole 14 and the second hole 15;

[0128] The wire spring 3 is also used to rotate relative to the heat sink 1 between an installation position and a removal position; in the installation position, the bent section 31 is staggered from the first through hole 14, and the bent section 31 is limited in the receiving groove 13; in the removal position, the bent section 31 corresponds to the first through hole 14, and the bent section 31 can be moved out of the receiving groove 13 through the first through hole 14;

[0129] In the locked state, the wire spring 3 is in the installed position.

[0130] No. 12, a print head based on No. 2,

[0131] The installation channel 11 is tapered, and the cross-sectional area of ​​the installation channel 11 gradually decreases along the direction in which the throat 21 is inserted into the installation channel 11;

[0132] The shape of the throat 21 matches the shape of the mounting passage 11;

[0133] In the locked state, the outer wall surface of the throat 21 is tightly fitted with the inner wall surface of the installation channel 11 .

[0134] No. 13, a print head based on No. 1,

[0135] The spray head assembly also includes a first terminal;

[0136] The print head also includes a second terminal, and the first terminal and the second terminal are detachably connected; when the first terminal and the second terminal are connected, the first terminal and the second terminal are electrically connected.

[0137] Reference numeral 14. A three-dimensional printer, comprising a print head according to any one of reference numerals 1 to 13.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A print head, characterized in that: include: Heat sink; Nozzle assembly; A locking member, the locking member being used to move relative to the heat sink to switch between a locked state and an unlocked state; In the locked state, the locking member locks the nozzle assembly to the heat sink; In the unlocked state, the locking member unlocks the nozzle assembly from the heat sink.

2. The print head according to claim 1, characterized in that: The locking member is movably disposed on the heat dissipation member; The locking member comprises a first abutment portion; The heat sink is provided with a mounting channel; The nozzle assembly comprises a throat pipe, the throat pipe is pluggable and inserted into the installation channel, and a second abutment portion is provided on the throat pipe; In the locked state, the first abutting portion abuts against the second abutting portion to limit the throat in the installation channel; in the unlocked state, the first abutting portion is separated from the second abutting portion to allow the throat to be detached from the installation channel.

3. The print head according to claim 2, characterized in that: A convex edge is arranged on the outer peripheral wall of the throat pipe, and the convex edge extends along the circumference of the throat pipe; the convex edge is located on a side opposite to the heat sink and includes the second abutting portion.

4. The print head according to claim 2, characterized in that: The locking member includes a wire spring, which is rotatably disposed on the heat sink. The wire spring is used to rotate relative to the heat sink to switch between the locking state and the unlocking state. The wire spring includes the first abutting portion.

5. The print head according to claim 4, characterized in that: The wire spring includes a curved section; In the locked state, the curved section abuts against the second abutting portion, so that the throat is limited in the installation channel; in the unlocked state, the curved section is separated from the second abutting portion, so that the throat can be separated from the installation channel; The bent section is the first abutting portion.

6. The print head according to claim 5, characterized in that: A limiting member is arranged on the heat sink; The wire spring comprises a limiting section, and the limiting section is connected to the bending section; The limiting section is used to limit the position of the limiting member so that the wire spring is in the locked state.

7. The print head according to claim 6, characterized in that: The limiting member includes a protrusion, and the protrusion is arranged on an end surface of the heat sink that is away from the nozzle assembly; The limiting section is used to be engaged with one side of the protrusion.

8. The print head according to claim 6, characterized in that: The wire spring also includes a gripping section, which is connected between the bending section and the limiting section, and is used for being held by a user.

9. The print head according to claim 8, characterized in that: In the locked state, the gripping section is at least partially away from the heat sink; The maximum distance between the gripping section and the heat sink is greater than or equal to 3 mm.

10. The print head according to claim 5, characterized in that: The heat sink is provided with a receiving groove on one end surface close to the nozzle assembly, and the receiving groove is communicated with the installation channel; The curved section is disposed in the receiving groove and is capable of rotating in the receiving groove; In the locked state, the second abutting portion is located in the accommodating groove.

11. The print head according to claim 10, characterized in that: A first through hole communicating with the accommodating groove is formed on one side of the heat dissipation element, and a second hole communicating with the accommodating groove is formed on the other side of the heat dissipation element, wherein the first through hole is a long strip-shaped hole; The wire spring is rotatably inserted into the first through hole and the second hole; The wire spring is also used to rotate relative to the heat sink between an installation position and a removal position; in the installation position, the bent section is staggered from the first through hole, and the bent section is limited in the receiving groove; in the removal position, the bent section corresponds to the first through hole, and the bent section can be moved out of the receiving groove through the first through hole; In the locked state, the wire spring is in the installed position.

12. The print head according to claim 2, characterized in that: The installation channel is tapered, and the cross-sectional area of ​​the installation channel gradually decreases along the direction in which the throat is inserted into the installation channel; The shape of the throat matches the shape of the mounting channel; In the locked state, the outer wall surface of the throat is tightly fitted with the inner wall surface of the installation channel.

13. The print head according to claim 1, characterized in that: The nozzle assembly also includes a first terminal; The print head further includes a second terminal, and the first terminal and the second terminal are detachably connected; when the first terminal and the second terminal are connected, the first terminal and the second terminal are electrically connected.

14. A three-dimensional printer, characterized in that: Comprising a print head as claimed in any one of claims 1 to 13.

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