Three-dimensional printing pen

Abstract

The invention provides a three-dimensional printing pen which comprises a pen body, a nozzle, a heating unit and a control unit, the nozzle is installed at the head of the pen body, the heating unit is installed in the pen body and located at the nozzle, the control unit is installed in the pen body and electrically connected with the heating unit, and the three-dimensional printing pen further comprises a feeding mechanism. The feeding mechanism comprises a pressing piece, a feeding assembly, a linkage assembly and a reset assembly, the pressing piece is movably connected with the pen body, the feeding assembly is movably installed in the pen body in the axial direction of the nozzle, the feeding assembly is provided with a feeding channel, and the linkage assembly is mechanically linked between the pressing piece and the feeding assembly; the pressing piece can drive the feeding assembly to slide towards the nozzle through the linkage assembly, and the reset assembly can force the feeding assembly to slide back to the nozzle. The three-dimensional printing pen is small, exquisite and light in design, low in fault, easy to maintain, low in production cost and high in safety coefficient.

Description

Technical Field

[0001] The present invention relates to the technical field of three-dimensional printing, in particular to a three-dimensional printing pen. Background Art

[0002] Existing 3D printing devices mainly include 3D printers and 3D printing pens. Among them, the 3D printing pen is a handheld device for printing 3D objects. Compared with the 3D printer, it not only allows users to doodle more personalized 3D objects, but also has a small size and is easy to carry. Therefore, it is favored by consumers. In addition, the working principle and materials used of the 3D printing pen are similar to those of the 3D printer, and both use PLA plastic or ABS plastic as printing consumables.

[0003] The 3D printing pen mainly includes a pen body, a nozzle, a heating unit, a feeding unit, a control unit, a battery unit and a button, etc. The nozzle is installed at the head of the pen body, and the heating unit, the feeding unit, the control unit and the battery unit are all installed in the pen body; the heating unit is used to heat the nozzle so that the printing consumables are heated into a molten state; the feeding unit is used to push the printing consumables to the jet and make them be extruded from the nozzle in a molten state; the control unit is electrically connected to the heating unit, the feeding unit, the battery unit and the button respectively, and the button is installed on the pen body. The control unit sends a control instruction to the control unit through the button, so that the control unit can control the heating unit to heat the nozzle, control the feeding unit to push the printing consumables to the nozzle, etc. It can be seen that the existing method of pushing printing consumables to the nozzle relies on a feeding unit, and the feeding unit generally includes a motor, a driving wheel and a driven wheel. The motor drives the driving wheel to rotate, and a material feeding channel is formed between the driving wheel and the driven wheel. When the motor drives the driving wheel to rotate, the driving wheel cooperates with the driven wheel to clamp and push the printing consumables to move the printing consumables toward the nozzle; however, the use of an electrical structure feeding unit to feed printing consumables requires a larger capacity battery unit, resulting in the three-dimensional printing pen having shortcomings such as large size, large weight, and high production cost. Furthermore, the electrical structure feeding unit has high energy consumption, poor reliability, and is prone to failure, and has high maintenance costs and a large risk factor. Summary of the invention

[0004] In order to solve the above problems, the main purpose of the present invention is to provide a three-dimensional printing pen that is compact and lightweight, has low failure rates and is easy to maintain, has low production costs and a high safety factor.

[0005] In order to achieve the main purpose of the present invention, the present invention provides a three-dimensional printing pen, including a pen body, a nozzle, a heating unit and a control unit, the nozzle is installed at the head of the pen body, the heating unit is installed in the pen body and located at the nozzle, the control unit is installed in the pen body and is electrically connected to the heating unit, wherein the three-dimensional printing pen also includes a feeding mechanism, the feeding mechanism includes a pressing piece, a feeding assembly, a linkage assembly and a reset assembly, the pressing piece is movably connected to the pen body, the feeding assembly is movably installed in the pen body in the axial direction of the nozzle, the feeding assembly has a feeding channel, the linkage assembly is mechanically linked between the pressing piece and the feeding assembly, the pressing piece can drive the feeding assembly to slide toward the nozzle through the linkage assembly, and the reset assembly can force the feeding assembly to slide back to the nozzle.

[0006] As can be seen from the above, when the pressing part is pressed, the pressing part drives the feeding component to slide toward the nozzle through the linkage component to push the printing consumables toward the nozzle, so that the printing consumables melt in the nozzle and are squeezed out of the nozzle; when the pressing part is released, under the drive of the reset component, the pressing part, the feeding component and the linkage component are restored to the initial state, waiting to push the printing consumables toward the nozzle again. In addition, unlike the traditional electrical feeding mechanism to control the feeding of printing consumables, the pure mechanical structure to control the feeding of printing consumables is more convenient to control the feeding amount, and has good timely operation feedback, and makes the three-dimensional printing pen highly reliable, not prone to failure, easy to maintain, low maintenance and production costs, and high safety factor; furthermore, the pressing part, feeding component, linkage component, etc. can all be made of plastic, making the three-dimensional printing pen lighter and conducive to miniaturization design. At the same time, since the feeding mechanism is a pure mechanical structure, the power consumption of the three-dimensional printing pen is reduced, which helps to improve the endurance of the three-dimensional printing pen, thereby improving the user experience.

[0007] A preferred solution is that a feed conduit is provided in the pen body, and the feed conduit is located between the tail of the pen body and the feeding channel; the pressing piece has a connecting rod portion and a first pressing portion, the first end of the connecting rod portion is rotatably installed in the pen body, the second end of the connecting rod portion is connected to the first pressing portion, and the first pressing portion can pass from the inside of the pen body to the outside of the pen body; the linkage assembly includes a first connecting rod and a second connecting rod, the first end of the first connecting rod is slidably connected to the connecting rod portion along the extension direction of the connecting rod portion, the first end of the first connecting rod can rotate relative to the connecting rod portion and is rotatably connected to the first end of the second connecting rod, the second end of the first connecting rod is rotatably connected to the conduit or the pen body, the second end of the first connecting rod is inclined away from the first pressing portion and extends obliquely toward the tail, and the second end of the second connecting rod is rotatably connected to the feeding assembly; the reset assembly forces the feeding assembly to slide away from the nozzle through the pressing piece and the feeding assembly.

[0008] As can be seen from the above, the first pressing portion extends out of the pen body to facilitate the user to press the first pressing piece, so that the user can accurately control the amount of pressure on the pressing piece, and then accurately control the amount of printing consumables extruded at the nozzle; in addition, the linkage component is combined with the pressing piece and the plastic component to form a combined connecting rod mechanism, so that the user can save more effort when pressing the pressing piece, and it is also convenient for the reset component to drive the pressing piece, the feeding component and the linkage component to reset; in addition, the feed conduit can guide the printing consumables to move more smoothly and orderly to the feeding component, thereby preventing the printing consumables from being broken or blocked from moving due to interference with the internal components of the pen body.

[0009] A further solution is that the feeding assembly includes a sliding seat and a clamping seat, the sliding seat is slidably connected to the pen body, the sliding seat has a feeding channel, the clamping seat is rotatably connected to the sliding seat, the clamping seat has a clamping block, the clamping block extends into the feeding channel, the second end of the second connecting rod is rotatably connected to the end of the clamping seat away from the nozzle, and when the second connecting rod pushes the feeding assembly to move toward the nozzle, it synchronously drives the clamping block to rotate into the feeding channel.

[0010] It can be seen from the above that as the second connecting rod pushes the feeding assembly to move, the second connecting rod will generate downward pressure on the clamping seat, causing the clamping seat to drive the clamping block to rotate into the feeding channel, so that the clamping block can cooperate with the bottom wall of the feeding channel to clamp the printing consumables, thereby ensuring the reliability of the printing consumables pushed by the feeding assembly to move toward the nozzle, making the control of the feeding amount and extrusion amount of the printing consumables more precise, which is conducive to users to better create their works.

[0011] A further solution is that an end of the clamping block facing the material feeding channel has an arc-shaped groove, the arc-shaped groove penetrates the clamping block along the axial direction, and the material feeding channel is parallel to the axial direction.

[0012] As can be seen from the above, the arc-shaped groove ensures that the printing consumables are clamped in cooperation with the bottom wall of the material feeding channel, thereby preventing the clamping block from exerting excessive cutting force on the printing consumables and preventing the printing consumables from being cut by the clamping block.

[0013] A further solution is that the reset component is a first tension spring, the first end of the first tension spring is connected to the first connecting rod, and the second end of the first tension spring is connected to the catheter or the pen body, or the reset component is a torsion spring, the torsion spring is arranged at the first end of the connecting rod part, and the torsion spring is connected between the connecting rod part and the pen body.

[0014] As can be seen from the above, the reset component directly links with the linkage component or the pressing piece and indirectly forces the feeding component to move back to the nozzle, so that under the action of the reset component, the feeding component, the pressing piece and the linkage component can be better reset, and the force required for the reset component during the reset process is smaller.

[0015] Another preferred scheme is that the pressing part has a second pressing part and a guiding part, the second pressing part can pass through from the inside of the pen body to the outside of the pen body, the guiding part has a first guiding surface and a limit pin, the first guiding surface extends from the second pressing part at an angle back to the nozzle; the feeding assembly has a conduit part and a matching part, the conduit part extends axially, the matching part has a second guiding surface, the second guiding surface is parallel to the first guiding surface and contacts with the first guiding surface; the linkage assembly is connected to the pen body, the linkage assembly has a first guide groove, a second guide groove and two supporting grooves, the first guide groove is perpendicular to the axial direction, the limit pin is slidably installed in the first guide groove, the second guide groove is parallel to the axial direction, the matching part is slidably installed in the second guide groove, the second guide groove is located between the two supporting grooves, and the conduit part is slidably installed in the two supporting grooves.

[0016] As can be seen from the above, by means of the coordinated design of the first guide surface of the pressing member and the second guide surface of the feeding assembly, the moving direction of the pressing member is perpendicular to the moving direction of the feeding assembly, which is more ergonomic and allows the user to more conveniently and accurately control the extrusion amount of the printing consumables during the use of the 3D printing pen; at the same time, it also avoids the shaking and / or swaying of the 3D printing pen caused by the user controlling the feeding mechanism to push the printing consumables, thereby ensuring the accuracy and aesthetics of the molded work.

[0017] A further solution is that the feeding assembly also includes a rubber sleeve, which is mounted on one end of the conduit portion close to the nozzle. The rubber sleeve has multiple flexible sheets spaced apart along its circumference, and the multiple flexible sheets are distributed in a cone-like shape, with the proximal end of the cone facing the nozzle.

[0018] As can be seen from the above, by adding a rubber sleeve, when the feeding assembly pushes the printing consumables toward the nozzle, the free end of the flexible sheet (i.e., the tip part) can play a role similar to a one-way ratchet to engage with the surface of the printing consumables, thereby enabling the feeding assembly to more reliably push the printing consumables to move.

[0019] A further solution is that the reset component is a compression spring, which is sleeved on the conduit portion and abuts between the linkage component and an end of the matching portion close to the nozzle; or the reset component is a second tension spring, which is sleeved on the conduit portion and connected between the linkage component and an end of the matching portion away from the nozzle.

[0020] As can be seen from the above, since the pressing piece and the feeding assembly are linked together through the first guide surface and the second guide surface, and the linkage assembly is fixedly connected to the pen body, directly driving the feeding assembly to reset through the reset assembly can not only ensure the reliability of the reset assembly in resetting the feeding assembly and the pressing piece, but also help to optimize the structural layout of the three-dimensional printing pen.

[0021] A further solution is that the 3D printing pen also includes an input unit, a power supply unit, an interface unit and a display unit electrically connected to the control unit, the input unit, the interface unit and the display unit are all installed on the pen body, the power supply unit is installed inside the pen body, the input unit is a switch or a button, and the display unit is an indicator light or a display screen.

[0022] As can be seen from the above, the input unit is used to output control instructions to the control unit, so that the control unit controls the 3D printing pen to work according to the set mode; the power supply unit supplies power to the 3D printing pen, so that the use of the 3D printing pen is less restricted by the surrounding environment, and it is more convenient to use and carry; the interface unit can be used to charge the power supply unit, and to establish a communication channel between the control unit and external electronic devices to facilitate the setting of the control unit; the setting of the display unit makes it easy for users to understand the working status of the 3D printing pen in real time and intuitively.

[0023] A further solution is that the control unit includes a wireless communication module, and the wireless communication module includes at least one of a Bluetooth module, a Wi-Fi module, and a Star Flash module.

[0024] As can be seen from the above, by setting up the wireless communication module, the user can establish a communication channel with the three-dimensional printing pen through the mobile terminal, thereby facilitating the setting of the control unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the first embodiment of the 3D printing pen of the present invention.

[0026] Figure 2 It is a structural diagram of the first embodiment of the three-dimensional printing pen of the present invention after omitting some components.

[0027] Figure 3 It is a structural diagram of the feeding mechanism of the first embodiment of the 3D printing pen of the present invention in an initial state.

[0028] Figure 4 1 is a structural diagram of a pressing member of a first embodiment of a 3D printing pen of the present invention.

[0029] Figure 5 1 is a structural diagram of a sliding seat of a first embodiment of a 3D printing pen of the present invention.

[0030] Figure 6 It is a structural diagram of the second embodiment of the first embodiment of the 3D printing pen of the present invention after omitting some components.

[0031] Figure 7 It is a structural diagram of the pen body of the first embodiment of the 3D printing pen of the present invention with some components omitted.

[0032] Figure 8This is a reference diagram of the feeding mechanism of the first embodiment of the 3D printing pen of the present invention in the use state of pushing the printing consumables to the nozzle.

[0033] Fig. 9 It is a structural diagram of the second embodiment of the 3D printing pen of the present invention.

[0034] Fig.10 4 is a cross-sectional view of a second embodiment of the 3D printing pen of the present invention.

[0035] Fig.11 It is an exploded view of the feeding mechanism of the second embodiment of the 3D printing pen of the present invention.

[0036] Fig.12 This is a reference diagram of the feeding mechanism of the second embodiment of the three-dimensional printing pen of the present invention in the use state with some components omitted when the feeding mechanism is pushing the printing consumables to the nozzle.

[0037] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0038] First embodiment of the three-dimensional printing pen

[0039] Reference Figure 1 and Figure 2 The three-dimensional printing pen 100 includes a pen body 1, a nozzle 2, a control unit 3, a feeding mechanism 4, an input unit 5, a power supply unit 6, an interface unit 4, a display unit 8 and a heating unit.

[0040] The pen body 1 is used for the user to hold, and the nozzle 2 is installed at the head of the pen body 1, so that the user can control the pen body 1 to drive the nozzle 2 to move along the desired path, thereby realizing the printing of three-dimensional objects. The control unit 3, the power unit 6, the heating unit, etc. are all installed in the pen body 1, and the control unit 3 is electrically connected to the input unit 5, the power unit 6, the interface unit 4, the display unit 8 and the heating unit respectively to coordinate the work between the functional units. The input unit 5, the interface unit 4 and the display unit 8 are all installed on the pen body 1, and the positions of the input unit 5, the interface unit 4 and the display unit 8 can be distributed at relevant parts of the pen body 1 according to the user's use needs and usage habits. There is no specific restriction here. For example, in this embodiment, the input unit 5 and the display unit 8 are arranged near the tail of the pen body 1, and the interface unit 4 is located at the tail end of the pen body 1; the heating unit is arranged at the nozzle 2, and the heating unit is used to heat the nozzle 2, so that the printing consumables 10 pushed into the nozzle 2 can be heated to melt and squeezed out of the nozzle 2.

[0041] In this embodiment, the input unit 5 is a switch that can be used to start or shut down the 3D printing pen 100; in some embodiments, the input unit 5 can also be a button, so that when starting or shutting down the 3D printing pen 100, relevant control instructions can be sent to the control unit 3 by controlling the number of buttons, the pressing mode of buttons, the combined pressing mode of buttons, etc., so that the control unit 3 controls the 3D printing pen 100 to work according to the set mode.

[0042] In addition, in this embodiment, the display unit 8 is an indicator light, which can be used to display the current working state of the 3D printing pen 100, so that the user can intuitively understand the current working state of the 3D printing pen 100 in real time. In some embodiments, the display unit 8 can also be a display screen to display richer content, so that the user can understand the current working state of the 3D printing pen 100 through the display screen, and can also be used to understand the current working parameters of the 3D printing pen 100, including but not limited to displaying the current remaining power of the power supply unit 6, displaying the current heating temperature of the heating unit, etc.

[0043] The power supply unit 6 is used to supply power to the 3D printing pen 100, so that the use of the 3D printing pen 100 is less restricted by the surrounding environment, and the use and portability are more convenient. The interface unit 4 is used to charge the power supply unit 6. In some embodiments, the interface unit 4 can also serve as a data interface, so that the control unit 3 can establish a communication channel with the external electronic device through the interface unit 4 and the data line, so as to facilitate the setting of the control unit 3, such as system update, parameter setting (including but not limited to heating temperature setting, etc., because different types of printing consumables 10 may have different melting points, so the heating temperature set by the heating unit can be adjusted through the interface unit 4) and the like.

[0044] In some embodiments, the 3D printing pen 100 may also be provided with a wireless charging module, which is electrically connected to the control unit 3 so that the 3D printing pen 100 can be wirelessly charged through a wireless charging device to enhance the charging flexibility of the 3D printing pen 100.

[0045] In some embodiments, a wireless communication module can also be integrated on the control unit 3; wherein the wireless communication module includes but is not limited to at least one of a Bluetooth module, a Wi-Fi module, and a Star Flash module; it can be seen that this design allows the user to set the control unit 3 through the relevant APP, such as system updates and parameter settings of the control unit 3 (including but not limited to heating temperature settings, etc., because different types of printing consumables 10 may have different melting points, so the heating temperature set by the heating unit can be adjusted through the interface unit 4), etc., so there is no need to connect the control unit 3 to the interface unit 4 through a data cable to set the control unit 3, making the use of the three-dimensional printing pen 100 more flexible and more practical.

[0046] The feeding mechanism 4 includes a pressing member 41, a feeding assembly 42, a linkage assembly 43 and a reset assembly 44. The pressing member 41 is movably connected to the pen body 1, and the feeding assembly 42 is movably installed in the pen body 1 in the axial direction of the nozzle 2. The linkage assembly 43 is mechanically linked between the pressing member 41 and the feeding assembly 42, so that the pressing member 41 can drive the feeding assembly 42 to slide toward the nozzle 2 through the linkage assembly 43, thereby pushing the printing consumables 10 to move toward the nozzle 2; the reset assembly 44 is used to force the feeding assembly 42 to slide back to the nozzle 2 to control the pressing member 41, the feeding assembly 42 and the linkage assembly 43 to reset, so that the feeding mechanism 4 can push the printing consumables 10 toward the nozzle 2 again when it is pressed and controlled next time. Among them, the feeding assembly 42 has a feeding channel 4210, and the feeding channel 4210 is used for the printing consumables 10 to pass through, so that the feeding assembly 42 can reliably push the printing consumables 10 to move toward the nozzle 2. It can be understood that the above-mentioned reset component 44 is used to force the feeding component 42 to slide back to the nozzle 2. The forcing mentioned in the above-mentioned reset component 44 can be that the reset component 44 directly forces the feeding component 42 to slide back to the nozzle 2, or the reset component 44 indirectly forces the feeding component 42 to slide back to the nozzle 2 through the linkage component 43 and / or the pressing member 41.

[0047] Combination Figure 3 In this embodiment, a feed conduit 11 is provided in the pen body 1, and the feed conduit 11 is located between the tail of the pen body 1 and the feed end of the feeding channel 4210 of the feeding assembly 42; the feed conduit 11 is used to guide the printing consumables 10 to move toward the feeding assembly 42 more smoothly and orderly during the process of the printing consumables 10 being pushed, and to prevent the printing consumables 10 from being broken or blocked from moving due to interference with internal components of the pen body 1.

[0048] Combination Figure 4 The pressing member 41 has a connecting rod portion 411 and a first pressing portion 412, and the first end of the connecting rod portion 411 is rotatably mounted in the pen body 1; for example, the first end of the connecting rod portion 411 can be rotatably connected to the pen body 1, and can also be rotatably connected to the feed conduit 11. The second end of the connecting rod portion 411 is connected to the first pressing portion 412, wherein a first slide groove 4111 is provided at the second end of the connecting rod portion 411, and the first slide groove 4111 is parallel to the extension direction of the connecting rod portion 411. The pen body 1 is provided with an escape opening, which passes through the wall of the pen body 1, and the escape opening allows at least part of the first pressing portion 412 to pass from the inside of the pen body 1 to the outside of the pen body 1, so that the user can press the first pressing member 41, so that the user can accurately control the amount of the pressing member 41 being pressed down, and then accurately control the amount of the printing consumables 10 extruded at the nozzle 2.

[0049] Combination Figures 5 to 7The feeding assembly 42 includes a sliding seat 421 and a clamping seat 422. The sliding seat 421 is slidably connected to the pen body 1. The above-mentioned feeding channel 4210 is formed on the sliding seat 421, and the feeding channel 4210 is parallel to the axial direction of the nozzle 2; in some embodiments, a second slide groove 12 is provided on the pen body 1, and the second slide groove 12 is parallel to the axial direction of the nozzle 2. Matchingly, a slider 4211 is provided on the sliding seat 421, and the slider 4211 is slidably inserted in the second slide groove 12, so that the sliding seat 421 can slide relative to the second slide groove 12.

[0050] The clamping seat 422 is rotatably connected to the sliding seat 421 via a pin shaft, wherein the clamping seat 422 has a slider 4211, which extends into the material feeding channel 4210, so that a clamping position can be formed between the clamping block 4221 and the bottom of the material feeding channel 4210 to clamp and fix the printing consumables 10, thereby ensuring the reliability of the feeding assembly 42 in pushing the printing consumables 10 to move toward the nozzle 2.

[0051] In some embodiments, the end of the clamping block 4221 facing the material feeding channel 4210 has an arc-shaped groove, and the arc-shaped groove penetrates the clamping block 4221 along the axial direction of the nozzle 2. The arc-shaped groove ensures that the clamping block 4221 can prevent the printing consumables 10 from being cut by the clamping block 4221 while ensuring that the printing consumables 10 are clamped by the bottom wall of the material feeding channel 4210.

[0052] The linkage assembly 43 includes a first connecting rod 431 and a second connecting rod 432. The first end of the first connecting rod 431 is provided with a pin 4311. When the first connecting rod 431 is connected to the connecting rod portion 411 of the pressing member 41, the pin 4311 is slidably inserted into the first sliding groove 4111 of the connecting rod portion 411, so that the first end of the first connecting rod 431 can slide along the first sliding groove 4111, and at the same time, the first connecting rod 431 can rotate relative to the connecting portion through the pin 4311; in addition, the second end of the first connecting rod 431 is rotatably connected to the catheter or the pen body 1, and the second end of the first connecting rod 431 is inclined away from the first pressing portion 412 and extends obliquely toward the tail of the pen body 1.

[0053] The first end of the second connecting rod 432 is rotatably connected to the pin 4311 of the first connecting rod 431, so that the second connecting rod 432 can also slide along the first sliding groove 4111 following the pin 4311; the second end of the first connecting rod 431 is hinged to the clamping seat 422 of the feeding assembly 42 through a pin shaft, so that the second connecting rod 432 can synchronously drive the clamping block 4221 on the clamping seat 422 to rotate into the feeding channel 4210 when pushing the feeding assembly 42 to move toward the nozzle 2. It can be seen that as the second connecting rod 432 pushes the feeding assembly 42 to move, the second connecting rod 432 will generate downward pressure on the clamping seat 422 so that the clamping seat 422 drives the clamping block 4221 to rotate into the feeding channel 4210. Therefore, the clamping block 4221 can cooperate with the bottom wall of the feeding channel 4210 to clamp the printing consumables 10, thereby ensuring the reliability of the printing consumables 10 pushed by the feeding assembly 42 to move toward the nozzle 2, and making the control of the feeding amount and extrusion amount of the printing consumables 10 more precise, which is conducive to users to better create works.

[0054] It can be understood that this design also enables the reset component 44 to control the resetting process of the pressing member 41, the feeding component 42, the linkage component 43, etc., and the second connecting rod 432 can generate an upward pulling force on the clamping seat 422, so that the clamping seat 422 drives the clamping block 4221 to rotate back to the feeding channel 4210, thereby releasing the clamping block 4221 and the feeding channel 4210 from clamping the printing consumables 10. In this way, the feeding component 42 will not generate a backward pulling force on the printing consumables 10 during the resetting process, effectively preventing the printing consumables 10 from falling out of the nozzle 2, preventing the nozzle 2 from being unable to extrude the printing consumables 10 normally during the next feeding, and at the same time avoiding interruptions in the extrusion of the printing consumables 10.

[0055] The reset component 44 forces the feeding component 42 to slide back to the nozzle 2 through the pressing member 41 and the feeding component 42. In this embodiment, the reset component 44 is a first tension spring, wherein the first end of the first tension spring is connected to the first connecting rod 431, and the second end of the first tension spring is connected to the catheter or the pen body 1. The reset component 44 is set as the first tension spring, so that the reset component 44 is directly linked with the linkage component 43 and indirectly forces the feeding component 42 to move back to the nozzle 2, so that under the action of the reset component 44, the feeding component 42, the pressing member 41 and the linkage component 43 can be better reset, and the reset component 44 requires less force during the reset process. In some embodiments, the reset component 44 can also be set as a torsion spring, which is set at the first end of the connecting rod part 411, and the torsion spring is connected between the connecting rod part 411 and the pen body 1. By designing the feeding mechanism 4, the linkage component 43 is matched with the pressing member 41 and the plastic component to form a combined connecting rod mechanism, so that the user can save more effort when pressing the pressing member 41, and it is also convenient for the reset component 44 to drive the pressing member 41, the feeding component 42 and the linkage component 43 to reset; in addition, the design of the feeding mechanism 4 also avoids the shaking and / or swaying of the three-dimensional printing pen 100 caused by the user controlling the feeding mechanism 4 to push the printing consumables, so as to ensure the accuracy and aesthetics of the molded work.

[0056] The following, combined Figure 2 , Figure 3 and Figure 8 The process of pushing the printing consumables 10 by the feeding mechanism 4 in this embodiment is briefly described as follows:

[0057] When the pressing member 41 is pressed, the pressing member 41 drives the feeding assembly 42 to slide toward the nozzle 2 through the linkage assembly 43, so as to push the printing consumables 10 toward the nozzle 2, so that the printing consumables 10 are melted in the nozzle 2 and extruded from the nozzle 2. In this process, the clamping seat 422 of the feeding assembly 42 clamps the printing consumables 10 through the cooperation of the clamping block 4221 and the material feeding channel 4210 under the action of the second connecting rod 432 of the linkage assembly 43, so as to ensure the reliability of pushing the printing consumables 10 toward the nozzle 2; at the same time, the reset assembly 44 performs deformation energy storage.

[0058] When the pressing member 41 is released, the reset assembly 44 recovers its shape and releases its capacity to pull the linkage assembly 43 to move, so that the pressing member 41 and the feeding assembly 42 are driven by the linkage assembly 43 to return to the initial state, ready to push the printing consumables 10 toward the nozzle 2 again.

[0059] Under the action of the second connecting rod 432 of the linkage assembly 43, the clamping seat 422 of the feeding assembly 42 moves back to the bottom wall of the feeding channel 4210 through the clamping block 4221 to release the clamping of the printing consumables 10, ensuring that the printing consumables 10 will not be pulled backward during the resetting process of the feeding assembly 42, thereby ensuring that the next time the feeding mechanism 4 is operated to push the printing consumables 10, the nozzle 2 can extrude the printing consumables 10 normally without extrusion interruption.

[0060] The three-dimensional printing pen 100 designed by the present invention has the following advantages:

[0061] First, it is convenient to control the feeding amount. The feeding assembly 42 is driven by the pressing member 41 to push the printing consumables 10 toward the nozzle 2, so that the user can flexibly press the pressing member 41 according to the actual printing needs to control the feeding amount on demand. For example, when the user draws some fine structures, the pressing member 41 can be pressed a small amount to achieve accurate small-scale feeding; and when a large area needs to be filled quickly, the pressing force can be appropriately increased to increase the pressing distance, thereby increasing the feeding amount; this operation is simple and intuitive, which is convenient for the user to accurately control the supply of the printing consumables 10.

[0062] Second, instant operational feedback. Since the pressing operation is directly related to the feeding action, the user can feel the impact of his operation on the feeding in real time, which makes it easy to adjust the pressing force and frequency in time, so that the feeding process is more in line with the ongoing 3D printing creation ideas, improving the creation efficiency and work quality.

[0063] Third, the linkage assembly 43 ensures coordinated work. The linkage assembly 43 mechanically links the pressing member 41 and the feeding assembly 42, ensuring that the pressing action is accurately converted into the sliding action of the feeding assembly 42, making the entire feeding process stable and orderly. As long as the pressing member 41 is operated as required, the feeding assembly 42 can complete the corresponding feeding action according to the established linkage mechanism, reducing feeding failures caused by problems such as poor mechanical coordination.

[0064] Fourth, high reliability. The reset component 44 can force the feeding component 42 to slide back to the nozzle 2, so that after each feeding action, the feeding component 42 can reliably return to the initial position and prepare for the next feeding; this cycle ensures that the entire feeding mechanism 4 can maintain a stable working state during long-term use, solves the problem that the existing electrical feeding mechanism 4 is prone to abnormalities after long-term work, and improves the overall reliability of the 3D printing pen 100.

[0065] Fifth, accurate feeding ensures molding accuracy. The feeding assembly 42 has a feeding channel 4210, and can accurately deliver the printing consumables 10 to the nozzle 2 under the action of pressing and resetting, so that the printing consumables 10 can be supplied to the printing area in an appropriate amount and a stable rhythm, which helps to improve the molding accuracy of the three-dimensional printed product. Whether printing complex three-dimensional shapes or simple geometric structures, accurate feeding can make the material accumulation of each layer and each place more uniform and accurate, making the final printed work closer to the design expectations.

[0066] Sixth, the material supply is consistent. With the cooperation of the linkage component 43 and the reset component 44, the feeding component 42 can continuously and rhythmically perform feeding and reset actions to ensure that the printing consumables 10 are continuously and consistently supplied to the nozzle 2 to be heated and extruded, avoiding problems such as printing interruption and line discontinuity caused by feeding interruption that affect the printing appearance and structural strength, thereby improving the overall printing effect.

[0067] Seventh, low energy consumption, easy maintenance, and low cost. Since the feeding mechanism 4 is a purely mechanical structure, the power consumption of the 3D printing pen 100 is reduced, which helps to improve the endurance of the 3D printing pen 100, thereby improving the user experience; and different from the traditional electrical feeding mechanism 4 that controls the feeding of the printing consumables 10, the purely mechanical feeding mechanism 4 has high reliability, is not prone to failure, is easy to maintain, has low maintenance and production costs, and has a high safety factor.

[0068] Eighth, it is small and light: the pressing member 41, the feeding assembly 42, the linkage assembly 43, etc. can all be made of plastic, so that the 3D printing pen 100 is lighter and is conducive to miniaturization design.

[0069] Second embodiment of the three-dimensional printing pen

[0070] The difference between this embodiment and the first embodiment of the 3D printing pen is mainly that the structure of the feeding mechanism is different. Specifically, Figures 9 to 12 , in this embodiment:

[0071] The feeding mechanism 9 also includes a pressing member 91, a feeding assembly 92, a linkage assembly 93 and a reset assembly 94. The pressing member 91 has a second pressing portion 911 and a guide portion 912. The second pressing portion 911 can pass through the escape opening on the pen body 1 from the inside of the pen body 1 to the outside of the pen body 1. The guide portion 912 has a first guide surface 9121 and a limit pin 9122, wherein the first guide surface 9121 extends obliquely from the second pressing portion 911 to the back of the nozzle 2.

[0072] The feeding assembly 92 has a conduit portion 921 and a matching portion 922, wherein the conduit portion 921 is parallel to the axial direction of the nozzle 2, and the matching portion 922 has a second guide surface 9221, wherein the second guide surface 9221 is parallel to the first guide surface 9121, and the second guide surface 9221 is used to match and contact with the first guide surface 9121, so that the pressing member 91 can push the feeding assembly 92 to move toward the nozzle 2 through the first guide surface 9121 and the second guide surface 9221, thereby pushing the printing consumables 10 toward the nozzle 2. It can be understood that since the feeding assembly 92 has the conduit portion 921 to support, guide, and limit the printing consumables 10, in this embodiment, no feeding conduit is required to be provided inside the pen body 1.

[0073] The linkage assembly 93 is fixedly connected to the pen body 1, and the linkage assembly 93 has a first guide groove 931, a second guide groove 932 and two support grooves 933. The first guide groove 931 is perpendicular to the axial direction. When the pressing member 91 is assembled with the linkage assembly 93, the limit pin 9122 on the pressing member 91 is slidably inserted in the first guide groove 931 of the linkage assembly 93, so that the pressing member 91 can slide along the first guide groove 931. The second guide groove 932 is parallel to the axial direction of the nozzle 2. When the feeding assembly 92 is assembled with the linkage assembly 93, the matching part 922 of the feeding assembly 92 is slidably installed in the second guide groove 932, so that the linkage assembly 93 can guide and limit the movement of the feeding assembly 92, so as to ensure that the feeding assembly 92 only moves in the axial direction of the nozzle 2, thereby ensuring the reliability of pushing the printing consumables 10 to the nozzle 2. The second guide groove 932 is located between the two support grooves 933. The bottom surface profile of the support groove 933 is preferably similar to the outer surface profile of the conduit portion 921 of the feeding assembly 92. The conduit portion 921 is slidably installed in the two support grooves 933, so that the linkage assembly 93 supports the two ends of the conduit portion 921 of the feeding assembly 92 through the two support grooves 933. It can be understood that since the feeding assembly 92 is slidably arranged on the linkage assembly 93, and the linkage assembly 93 is installed on the pen body 1, the pen body 1 can be provided with a second slide groove.

[0074] By matching the first guide surface 9121 of the pressing member 91 and the second guide surface 9221 of the feeding assembly 92, the moving direction of the pressing member 91 is perpendicular to the moving direction of the feeding assembly 92, which is more ergonomic and allows the user to more conveniently and accurately control the extrusion amount of the printing consumables 10 when using the 3D printing pen; at the same time, it also avoids the shaking and / or swaying of the 3D printing pen caused by the user controlling the feeding mechanism 9 to push the printing consumables 10, thereby ensuring the accuracy and aesthetics of the molded work.

[0075] In this embodiment, the reset component 94 is a compression spring, which is sleeved on the conduit portion 921, and abuts between the linkage component 93 and the end of the matching portion 922 close to the nozzle 2. Since the pressing member 91 and the feeding component 92 are linked by the first guide surface 9121 and the second guide surface 9221, and the linkage component 93 is fixedly connected to the pen body 1, the reset component 94 directly drives the feeding component 92 to reset, which can ensure the reliability of the reset component 94 in resetting the feeding component 92 and the pressing member 91, and is conducive to optimizing the structural layout of the three-dimensional printing pen.

[0076] In some embodiments, the reset component 94 can also be set as a second tension spring. When the reset component 94 is set as a second tension spring, the second tension spring is preferably mounted on the conduit portion 921, and the second tension spring is connected between the linkage component 93 and the end of the mating portion 922 away from the nozzle 2.

[0077] In some embodiments, the feeding assembly 92 also includes a rubber sleeve 923, which is mounted on one end of the conduit portion 921 close to the nozzle 2; wherein the rubber sleeve 923 has a plurality of flexible sheets 9231 spaced apart along its own circumference, and the plurality of flexible sheets 9231 are distributed in a cone-like shape, with the proximal end of the cone-like shape disposed toward the nozzle 2. By adding the rubber sleeve 923, during the process of the feeding component 92 pushing the printing consumables 10 to move toward the nozzle 2, the free end (i.e., the tip portion) of the flexible sheet 9231 can play a role similar to a one-way ratchet to engage with the surface of the printing consumables 10, thereby enabling the feeding component 92 to more reliably push the printing consumables 10 to move; it is understandable that during the resetting process of the feeding component 92, the free end of the flexible sheet 9231 will slide relative to the surface of the printing consumables 10, thereby not generating a backward pulling force on the printing consumables 10, thereby effectively preventing the printing consumables 10 from slipping out of the nozzle 2, preventing the nozzle 2 from being unable to extrude the printing consumables 10 normally during the next feeding, thereby preventing interruptions in the extrusion of the printing consumables 10.

[0078] Except for the above differences, other structures of the 3D printing pen in this embodiment are basically the same as those of the 3D printing pen described in the first embodiment of the 3D printing pen.

[0079] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. 3D printing pen, including: Pen body; A nozzle, the nozzle being mounted at the head of the pen body; A heating unit, the heating unit is installed in the pen body and located at the nozzle; A control unit, the control unit is installed in the pen body and is electrically connected to the heating unit; Characterized in that the three-dimensional printing pen also includes a feeding mechanism, and the feeding mechanism includes: A pressing member, the pressing member being movably connected to the pen body; A feeding assembly, the feeding assembly is movably mounted in the pen body in the axial direction of the nozzle, and the feeding assembly has a feeding channel; A linkage assembly, wherein the linkage assembly is mechanically linked between the pressing member and the feeding assembly, and the pressing member can drive the feeding assembly to slide toward the nozzle through the linkage assembly; A reset assembly can force the feeding assembly to slide back toward the nozzle.

2. The three-dimensional printing pen according to claim 1, characterized in that: A feed conduit is provided in the pen body, and the feed conduit is located between the tail of the pen body and the feed channel; The pressing member comprises a connecting rod and a first pressing portion, wherein the first end of the connecting rod is rotatably mounted in the pen body, the second end of the connecting rod is connected to the first pressing portion, and the first pressing portion can pass through the inside of the pen body to the outside of the pen body; The linkage assembly comprises a first connecting rod and a second connecting rod, wherein the first end of the first connecting rod is slidably connected to the connecting rod portion along the extension direction of the connecting rod portion, the first end of the first connecting rod can rotate relative to the connecting rod portion and is rotatably connected to the first end of the second connecting rod, the second end of the first connecting rod is rotatably connected to the catheter or the pen body, the second end of the first connecting rod is inclined away from the first pressing portion and extends obliquely toward the tail, and the second end of the second connecting rod is rotatably connected to the feeding assembly; The reset assembly forces the feeding assembly to slide back toward the nozzle through the pressing member and the feeding assembly.

3. The three-dimensional printing pen according to claim 2, characterized in that: The feeding assembly comprises: A sliding seat, the sliding seat is slidably connected to the pen body, and the sliding seat has the material feeding channel; A clamping seat, the clamping seat is rotatably connected to the sliding seat, the clamping seat has a clamping block, the clamping block extends into the material feeding channel, the second end of the second connecting rod is rotatably connected to the end of the clamping seat away from the nozzle, and when the second connecting rod pushes the feeding assembly to move toward the nozzle, the clamping block is synchronously driven to rotate into the material feeding channel.

4. The three-dimensional printing pen according to claim 3, characterized in that: The clamping block has an arc-shaped groove at one end facing the material passage, and the arc-shaped groove penetrates the clamping block along the axial direction, and the material passage is parallel to the axial direction.

5. The three-dimensional printing pen according to claim 2, characterized in that: The reset component is a first tension spring, a first end of the first tension spring is connected to the first connecting rod, and a second end of the first tension spring is connected to the catheter or the pen body, or The reset assembly is a torsion spring, which is arranged at the first end of the connecting rod portion and connected between the connecting rod portion and the pen body.

6. The three-dimensional printing pen according to claim 1, characterized in that: The pressing member comprises a second pressing portion and a guide portion, wherein the second pressing portion can pass through the inside of the pen body to the outside of the pen body, and the guide portion comprises a first guide surface and a limit pin, wherein the first guide surface extends obliquely from the second pressing portion and away from the nozzle; The feeding assembly comprises a conduit portion and a matching portion, wherein the conduit portion extends along the axial direction, and the matching portion comprises a second guide surface, wherein the second guide surface is parallel to the first guide surface and contacts the first guide surface; The linkage assembly is connected to the pen body, and the linkage assembly has a first guide groove, a second guide groove and two supporting grooves. The first guide groove is perpendicular to the axial direction, the limit pin is slidably installed in the first guide groove, the second guide groove is parallel to the axial direction, the matching part is slidably installed in the second guide groove, the second guide groove is located between the two supporting grooves, and the catheter part is slidably installed in the two supporting grooves.

7. The three-dimensional printing pen according to claim 6, characterized in that: The feeding assembly also includes a rubber sleeve, which is sleeved on one end of the conduit portion close to the nozzle. The rubber sleeve has a plurality of flexible sheets spaced apart along its circumference, and the plurality of flexible sheets are distributed in a cone-like shape, with the proximal end of the cone-like shape disposed toward the nozzle.

8. The three-dimensional printing pen according to claim 6, characterized in that: The reset component is a compression spring, which is sleeved on the conduit portion and abuts between the linkage component and an end of the matching portion close to the nozzle; or The reset component is a second tension spring, the second tension spring is sleeved on the conduit portion, and the second tension spring is connected between the linkage component and an end of the matching portion away from the nozzle.

9. The three-dimensional printing pen according to any one of claims 1 to 8, characterized in that: The three-dimensional printing pen also includes an input unit, a power supply unit, an interface unit and a display unit electrically connected to the control unit. The input unit, the interface unit and the display unit are all installed on the pen body. The power supply unit is installed inside the pen body. The input unit is a switch or a button, and the display unit is an indicator light or a display screen.

10. The three-dimensional printing pen according to claim 9, characterized in that: The control unit includes a wireless communication module, and the wireless communication module includes at least one of a Bluetooth module, a Wi-Fi module, and a Star Flash module.

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