Three-dimensional printing pen

Abstract

The utility model 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 utility model relates to three -dimensional printing technical field, concretely, it relates to a three -dimensional printing pen. BACKGROUND

[0002] The existing three -dimensional printing equipment mainly includes three -dimensional printer and three -dimensional printing pen, wherein, three -dimensional printing pen as a kind of printing three -dimensional object handheld device, it not only can be used by user to doodle more personalized three -dimensional object compared with three -dimensional printer, and small, easy to carry, therefore, it is favored by consumers;In addition, three -dimensional printing pen and three -dimensional printer working principle, use material are similar, both are using PLA plastic or ABS plastic as printing consumables.

[0003] Three -dimensional printing pen mainly includes pen body, nozzle, heating unit, feeding unit, control unit, battery unit and button, nozzle is installed at the head of pen body, heating unit, feeding unit, control unit and battery unit are all installed in pen body;Heating unit is used to heat nozzle, so that printing consumables is heated into molten state;Feeding unit is used to push printing consumables to nozzle, and make molten state be extruded from nozzle;Control unit is electrically connected with heating unit, feeding unit, battery unit and button respectively, button is installed on pen body, and control instruction is sent to control unit by button, can make control unit control heating unit heating nozzle, control feeding unit pushing printing consumables to nozzle etc.。Therefore, it can be seen that, the existing printing consumables is pushed to nozzle by relying on feeding unit, and feeding unit generally includes motor, driving wheel and driven wheel, motor drives driving wheel to rotate, and driving channel is formed between driving wheel and driven wheel, when motor drives driving wheel to rotate, driving wheel cooperates with driven wheel to push printing consumables, so that printing consumables moves to nozzle;However, the feeding unit with electrical structure is used for printing consumables feeding, and it needs larger capacity battery unit, leading to three -dimensional printing pen having the disadvantages of large size, heavy weight and high production cost, in addition, the feeding unit with electrical structure has high energy consumption, poor reliability, is easy to break down, and has high maintenance cost and large risk coefficient. SUMMARY

[0004] In order to solve the above problems, the main purpose of the utility model is to provide a three -dimensional printing pen which is beneficial to small and light design, low failure, easy maintenance, low production cost and high safety factor.

[0005] In order to realize the main purpose of the utility model, the utility model provides a three-dimensional printing pen, including pen body, nozzle, heating unit and control unit, the nozzle is installed at the head of the pen body, the heating unit is installed in the pen body and is located at the nozzle, the control unit is installed in the pen body and is electrically connected with the heating unit, wherein, the three-dimensional printing pen further includes feeding mechanism, the feeding mechanism includes pressing piece, feeding assembly, linkage assembly and 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 has a material running 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 to the nozzle through the linkage assembly, the reset assembly can force the feeding assembly to slide away from the nozzle.

[0006] As can be seen from the above, when the pressing piece is pressed, the pressing piece drives the feeding assembly to slide to the nozzle through the linkage assembly, so as to push the printing consumables to the nozzle, so that the printing consumables are melted in the nozzle and are extruded out of the nozzle; when the pressing of the pressing piece is released, under the driving of the reset assembly, the pressing piece, the feeding assembly and the linkage assembly all return to the initial state, so as to push the printing consumables to the nozzle again. In addition, unlike the traditional electrical feeding mechanism for controlling the feeding of the printing consumables, the pure mechanical structure for controlling the feeding of the printing consumables is more convenient to control the feeding amount, has good timely operation feedback, and makes the three-dimensional printing pen have high reliability, is not prone to failure, is convenient to maintain, has low maintenance and manufacturing cost, and has high safety factor; furthermore, the pressing piece, the feeding assembly and the linkage assembly can all be made of plastic, so that the three-dimensional printing pen is lighter in weight, is beneficial to miniaturization design, and 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, and thus improves the user experience.

[0007] One preferred scheme is that the pen body is provided with a feeding guide pipe between the tail of the pen body and the material running channel; the pressing piece has a connecting rod part and a first pressing part, a first end of the connecting rod part is rotatably installed in the pen body, a second end of the connecting rod part is connected with the first pressing part, and the first pressing part can pass out 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, a first end of the first connecting rod is slidably connected with the connecting rod part along the extension direction of the connecting rod part, the first end of the first connecting rod can rotate relative to the connecting rod part and is rotatably connected with a first end of the second connecting rod, a second end of the first connecting rod is rotatably connected with the guide pipe or the pen body, the second end of the first connecting rod extends obliquely away from the first pressing part and obliquely towards the tail, and a second end of the second connecting rod is rotatably connected with 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] From the above, the first pressing part protrudes outside the pen body, which facilitates the user to press the first pressing part, so that the user can accurately control the amount of pressing the pressing part, and further accurately control the extrusion amount of the printing consumables at the nozzle; in addition, the linkage assembly is matched with the pressing part and the plastic assembly to form a combined linkage mechanism, so that the user can press the pressing part more easily, and the reset assembly can drive the pressing part, the feeding assembly and the linkage assembly to reset; in addition, the feeding conduit can guide the printing consumables to move more smoothly and orderly to the feeding assembly, thereby preventing the printing consumables from being broken or blocked due to interference with the internal parts of the pen body.

[0009] Further, the feeding assembly includes a sliding seat and a clamping seat, the sliding seat is slidingly connected with the pen body, the sliding seat has a feeding channel, the clamping seat is rotationally connected with the sliding seat, the clamping seat has a clamping block, the clamping block extends into the feeding channel, the second end of the second linkage is rotationally connected with the end of the clamping seat away from the nozzle, and the second linkage drives the clamping block to rotate into the feeding channel when the second linkage drives the feeding assembly to move towards the nozzle.

[0010] From the above, during the movement of the feeding assembly driven by the second linkage, the second linkage applies a downward force to the clamping seat, so that the clamping seat drives 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 movement of the printing consumables pushed by the feeding assembly towards the nozzle, and making the control of the feeding amount and the extrusion amount of the printing consumables more accurate, which is beneficial to the user to better create works.

[0011] Further, the end of the clamping block towards the feeding channel has an arc-shaped groove, the arc-shaped groove penetrates the clamping block along the axial direction, and the feeding channel is parallel to the axial direction.

[0012] From the above, the arc-shaped groove can prevent the clamping block from generating excessive cutting force on the printing consumables when cooperating with the bottom wall of the feeding channel to clamp the printing consumables, thereby avoiding the printing consumables being cut off by the clamping block.

[0013] Further, the reset assembly is a first tension spring, the first end of the first tension spring is connected with the first linkage, the second end of the first tension spring is connected with the conduit or the pen body, or the reset assembly is a torsion spring, the torsion spring is arranged at the first end of the linkage part, and the torsion spring is connected between the linkage part and the pen body.

[0014] From the above, the reset assembly directly links with the linkage assembly or the pressing part, and indirectly forces the feeding assembly to move away from the nozzle, so that the feeding assembly, the pressing part and the linkage assembly can be better reset under the action of the reset assembly, and the required force of the reset assembly during the reset process is smaller.

[0015] Another preferred solution is that the pressing member has a second pressing portion and a guide portion, the second pressing portion is capable of passing from the inside of the pen body to the outside of the pen body, the guide portion has a first guide surface and a limiting pin, the first guide surface extends from the second pressing portion and is inclined away from the nozzle; the feeding assembly has a guide pipe portion and a matching portion, the guide pipe portion extends along the axial direction, the matching portion has a second guide surface, the second guide surface is parallel to the first guide surface and is in contact with the first guide surface; the linkage assembly is connected with 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 limiting pin is slidingly installed in the first guide groove, the second guide groove is parallel to the axial direction, the matching portion is slidingly installed in the second guide groove, the second guide groove is located between the two supporting grooves, and the guide pipe portion is slidingly installed in the two supporting grooves.

[0016] As can be seen from the above, through the cooperative 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, so as to be more in line with ergonomics, and it is more convenient and accurate for the user to control the extrusion amount of the printing consumables during the use of the three-dimensional printing pen; at the same time, it also avoids the three-dimensional printing pen from shaking and / or shaking during the user controlling the feeding mechanism to push the printing consumables, so as to ensure the precision and aesthetics of the formed work.

[0017] A further solution is that the feeding assembly further comprises a rubber sleeve, the rubber sleeve is sleeved on one end of the guide pipe portion close to the nozzle, and the rubber sleeve has a plurality of flexible pieces distributed along the circumferential direction of the rubber sleeve, the plurality of flexible pieces are distributed in a conical shape, and the proximal end of the conical shape is arranged towards the nozzle.

[0018] As can be seen from the above, through the addition of the rubber sleeve, the free end (i.e. the tip portion) of the flexible piece can play a role similar to a one-way ratchet during the movement of the feeding assembly pushing the printing consumables towards the nozzle, so as to engage with the surface of the printing consumables, thereby making the feeding assembly more reliably push the printing consumables to move.

[0019] A still further solution is that the reset assembly is a compression spring, the compression spring is sleeved on the guide pipe portion, and the compression spring is abutted between the linkage assembly and one end of the matching portion close to the nozzle; or the reset assembly is a second tension spring, the second tension spring is sleeved on the guide pipe portion, and the second tension spring is connected between the linkage assembly and one end of the matching portion away from the nozzle.

[0020] As can be seen from the above, since the pressing member and the feeding assembly are cooperatively linked through the first guide surface and the second guide surface, and the linkage assembly is fixedly connected with the pen body, the feeding assembly is directly driven by the reset assembly to reset, which can not only ensure the reliability of the reset assembly in resetting the feeding assembly and the pressing member, but also be beneficial to optimizing the structural layout of the three-dimensional printing pen.

[0021] Further, the three-dimensional printing pen further comprises an input unit, a power unit, an interface unit and a display unit electrically connected with the control unit, the input unit, the interface unit and the display unit are installed on the pen body, the power unit is installed in 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, the input unit is used for outputting a control instruction to the control unit, so that the control unit controls the three-dimensional printing pen to work in a set mode; the power unit supplies power for the three-dimensional printing pen, so that the use of the three-dimensional printing pen is less limited by the surrounding environment, and the use convenience and carrying convenience are stronger; the interface unit can be used for charging the power unit, and can also establish a communication channel between the control unit and an external electronic device, so as to facilitate setting of the control unit; and the display unit is convenient for a user to intuitively and timely understand the working state of the three-dimensional printing pen.

[0023] Further, the control unit comprises a wireless communication module, and the wireless communication module comprises at least one of a Bluetooth module, a Wi-Fi module and a star flash module.

[0024] As can be seen, by arranging the wireless communication module, a user can establish a communication channel with the three-dimensional printing pen through a mobile terminal, and then setting of the control unit is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural view of a first embodiment of the three-dimensional printing pen.

[0026] Figure 2 is a structural view of the first embodiment of the three-dimensional printing pen after a part of components are omitted.

[0027] Figure 3 is a structural view of the first embodiment of the three-dimensional printing pen in an initial state of a feeding mechanism.

[0028] Figure 4 is a structural view of a pressing piece of the first embodiment of the three-dimensional printing pen.

[0029] Figure 5 is a structural view of a sliding seat of the first embodiment of the three-dimensional printing pen.

[0030] Figure 6 is a structural view of the first embodiment of the three-dimensional printing pen after a part of components are omitted.

[0031] Figure 7 is a structural view of the first embodiment of the three-dimensional printing pen after a part of components of a pen body are omitted.

[0032] Figure 8This is a reference diagram showing the feeding mechanism of the first embodiment of the 3D printing pen of this utility model in the state of pushing printing consumables to the nozzle.

[0033] Figure 9 This is a structural diagram of the second embodiment of the 3D printing pen of this utility model.

[0034] Figure 10 This is a cross-sectional view of the second embodiment of the 3D printing pen of this utility model.

[0035] Figure 11 This is an exploded view of the feeding mechanism of the second embodiment of the 3D printing pen of this utility model.

[0036] Figure 12 This is a reference diagram showing the feeding mechanism of the second embodiment of the 3D printing pen of this utility model in its usage state after omitting some components when pushing printing consumables to the nozzle.

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0038] First embodiment of 3D printing pen

[0039] Reference Figure 1 and Figure 2 The 3D 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 for the user to hold, and the nozzle 2 is installed at the head of the pen body 1, allowing the user to control the pen body 1 to move the nozzle 2 along a desired path, thereby achieving the printing of three-dimensional objects. The control unit 3, power supply unit 6, heating unit, etc., are all installed inside the pen body 1. The control unit 3 is electrically connected to the input unit 5, power supply unit 6, interface unit 4, display unit 8, and heating unit to coordinate the operation of each functional unit. The input unit 5, interface unit 4, and display unit 8 are all installed on the pen body 1, and their positions can be distributed on relevant parts of the pen body 1 according to the user's needs and habits. There are no specific limitations. For example, in this embodiment, the input unit 5 and display unit 8 are located near the tail of the pen body 1, while the interface unit 4 is located at the tail end of the pen body 1. The heating unit is located at the nozzle 2 and is used to heat the nozzle 2 so that the printing consumable 10 pushed into the nozzle 2 can be heated to melt and extruded from the nozzle 2.

[0041] In the embodiment, the input unit 5 is a switch, which can be used to start or stop the three-dimensional printing pen 100; in some embodiments, the input unit 5 can also be a button, which can be used to send relevant control instructions to the control unit 3 by the number of buttons, the pressing mode of the buttons, the combined pressing mode between the buttons, etc. to control the three-dimensional printing pen 100 to work in a set mode.

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

[0043] The power supply unit 6 is used to supply power for the three-dimensional printing pen 100, so that the use of the three-dimensional printing pen 100 is less limited by the surrounding environment, and the use convenience and carrying convenience are stronger. 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 utility, so that the control unit 3 can establish a communication channel between the interface unit 4 and the external electronic device through a data line, thereby facilitating the setting of the control unit 3, such as system updating, parameter setting (including but not limited to heating temperature setting, because the melting point of different types of printing consumables 10 can be different, so the heating temperature set by the heating unit can be adjusted through the interface unit 4), etc.

[0044] In some embodiments, the three-dimensional printing pen 100 can also be provided with a wireless charging module, and the wireless charging module is electrically connected with the control unit 3, so that the three-dimensional printing pen 100 can be wirelessly charged by a wireless charging device, thereby improving the flexibility of charging the three-dimensional printing pen 100.

[0045] In some embodiments, the control unit 3 can also be integrated with a wireless communication module; 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 enables the user to set the control unit 3 through a related APP, such as system updating, parameter setting (including but not limited to heating temperature setting, because the melting point of different types of printing consumables 10 can be different, so the heating temperature set by the heating unit can be adjusted through the interface unit 4), etc., thereby eliminating the need to connect the control unit 3 to the interface unit 4 through a data line to set the control unit 3, so that the three-dimensional printing pen 100 is more flexible and practical to use.

[0046] The feeding mechanism 4 comprises a pressing member 41, a feeding assembly 42, a linkage assembly 43 and a reset assembly 44. The pressing member 41 is movably connected with the pen body 1, 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 to the nozzle 2 through the linkage assembly 43, thereby pushing the printing consumable 10 to move to the nozzle 2; the reset assembly 44 is used to force the feeding assembly 42 to slide away from the nozzle 2, so as to control the reset of the pressing member 41, the feeding assembly 42 and the linkage assembly 43, thereby enabling the feeding mechanism 4 to push the printing consumable 10 to the nozzle 2 again when it is pressed and controlled next time. The feeding assembly 42 has a feeding channel 4210 for the printing consumable 10 to pass through, thereby facilitating the feeding assembly 42 to reliably push the printing consumable 10 to move to the nozzle 2. It can be understood that the forcing of the feeding assembly 42 to slide away from the nozzle 2 by the reset assembly 44 described above can be that the reset assembly 44 directly forces the feeding assembly 42 to slide away from the nozzle 2, or that the reset assembly 44 indirectly forces the feeding assembly 42 to slide away from the nozzle 2 through the linkage assembly 43 and / or the pressing member 41.

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

[0048] In combination Figure 4 The pressing member 41 has a connecting rod part 411 and a first pressing part 412, the first end of the connecting rod part 411 is rotatably installed in the pen body 1; for example, the first end of the connecting rod part 411 can be rotatably connected with the pen body 1, or can be rotatably connected with the feeding conduit 11. The second end of the connecting rod part 411 is connected with the first pressing part 412, wherein the second end of the connecting rod part 411 is provided with a first sliding groove 4111, which is parallel to the extension direction of the connecting rod part 411. The pen body 1 is provided with an avoiding opening, which penetrates the wall of the pen body 1, and can allow at least part of the first pressing part 412 to pass from the inside of the pen body 1 to the outside of the pen body 1, so as to facilitate the user to press the first pressing member 41, and enable the user to accurately control the amount of being pressed of the pressing member 41, and further accurately control the extrusion amount of the printing consumable 10 at the nozzle 2.

[0049] In combination Figures 5 to 7The feeding assembly 42 comprises a sliding seat 421 and a clamping seat 422. The sliding seat 421 is in sliding connection with the pen body 1. The feeding channel 4210 is formed on the sliding seat 421 and is parallel to the axial direction of the nozzle 2. In some embodiments, the pen body 1 is provided with a second sliding groove 12 which is parallel to the axial direction of the nozzle 2. Correspondingly, the sliding seat 421 is provided with a sliding block 4211 which is slidingly inserted into the second sliding groove 12, so that the sliding seat 421 can slide relative to the second sliding groove 12.

[0050] The clamping seat 422 is in rotational connection with the sliding seat 421 through a pin shaft. The clamping seat 422 is provided with the sliding block 4211 which extends into the feeding channel 4210, so that a clamping position can be formed between the clamping block 4221 and the bottom of the feeding channel 4210 to clamp and fix the printing consumable 10, thereby ensuring the reliability of the feeding assembly 42 in pushing the printing consumable 10 to move towards the nozzle 2.

[0051] In some embodiments, one end of the clamping block 4221 towards the feeding channel 4210 is provided with an arc-shaped groove which penetrates the clamping block 4221 along the axial direction of the nozzle 2. The arc-shaped groove can prevent the clamping block 4221 from generating excessive cutting force on the printing consumable 10 when clamping the printing consumable 10, thereby avoiding the printing consumable 10 from being cut off by the clamping block 4221.

[0052] The linkage assembly 43 comprises 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 with the connecting rod part 411 of the pressing member 41, the pin 4311 is slidingly inserted into the first sliding groove 4111 of the connecting rod part 411, so that the first end of the first connecting rod 431 can slide along the first sliding groove 4111, and the first connecting rod 431 can also rotate relative to the connecting part through the pin 4311. In addition, the second end of the first connecting rod 431 is in rotational connection with the conduit or the pen body 1, and the second end of the first connecting rod 431 extends obliquely away from the first pressing part 412 and towards the tail of the pen body 1.

[0053] The first end of the second connecting rod 432 is rotationally connected with 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 hingedly connected with 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 material passing channel 4210 when pushing the feeding assembly 42 to move towards the nozzle 2. It can be seen that, since the second connecting rod 432 generates a downward pressure on the clamping seat 422 to make the clamping seat 422 drive the clamping block 4221 to rotate into the material passing channel 4210 during the movement of the feeding assembly 42, the clamping block 4221 can cooperate with the bottom wall of the material passing channel 4210 to clamp the printing consumable 10, thereby ensuring the reliability of the movement of the printing consumable 10 pushed by the feeding assembly 42 towards the nozzle 2, and making the control of the feeding amount and the extrusion amount of the printing consumable 10 more accurate, which is beneficial for users to better create works.

[0054] It can be understood that this design also enables the second connecting rod 432 to generate an upward pulling force on the clamping seat 422 to make the clamping seat 422 drive the clamping block 4221 to rotate away from the material passing channel 4210 during the resetting of the control pressing piece 41, the feeding assembly 42, the linkage assembly 43 and the like, thereby making the clamping block 4221 and the material passing channel 4210 release the clamping and fixing of the printing consumable 10. In this way, the feeding assembly 42 will not generate a backward pulling force on the printing consumable 10 during the resetting process, effectively avoiding the printing consumable 10 from being pulled out of the nozzle 2, preventing the nozzle 2 from normally extruding the printing consumable 10 during the next feeding, and avoiding the interruption of the extrusion of the printing consumable 10.

[0055] The reset component 44 forces the feeding component 42 to slide away from the nozzle 2 by the pressing component 41, and in the embodiment, the reset component 44 is a first tension spring, wherein a first end of the first tension spring is connected with the first connecting rod 431, and a second end of the first tension spring is connected with the guide pipe 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 assembly 43 and indirectly forces the feeding component 42 to move away from the nozzle 2, so that the feeding component 42, the pressing component 41 and the linkage assembly 43 can be better reset under the action of the reset component 44, and the required force of the reset component 44 is smaller during the reset process. In some embodiments, the reset component 44 can also be set as a torsion spring, which is arranged at the first end of the connecting rod part 411 and connected between the connecting rod part 411 and the pen body 1. Through the design of the feeding mechanism 4, the linkage assembly 43 is matched with the pressing component 41 and the plastic component to form a combined connecting rod mechanism, so that the user can press the pressing component 41 more easily, and the reset component 44 can drive the pressing component 41, the feeding component 42 and the linkage assembly 43 to reset. In addition, the design of the feeding mechanism 4 also avoids the three-dimensional printing pen 100 from shaking and / or shaking during the process that the user controls the feeding mechanism 4 to push the printing consumables, so as to ensure the precision and aesthetics of the formed work.

[0056] Hereinafter, the pushing process of the feeding mechanism 4 to the printing consumables 10 in the embodiment will be described in combination with Figure 2 、 Figure 3 and Figure 8

[0057] When the pressing component 41 is pressed, the pressing component 41 drives the feeding component 42 to slide to the nozzle 2 through the linkage assembly 43, so as to push the printing consumables 10 to the nozzle 2, so that the printing consumables 10 are melted in the nozzle 2 and extruded out of the nozzle 2. During the process, the clamping seat 422 of the feeding component 42 is clamped to the printing consumables 10 through the cooperation of the clamping block 4221 and the material running 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 to the nozzle 2; at the same time, the reset component 44 is deformed to store energy.

[0058] When the pressing of the pressing component 41 is released, the reset component 44 restores the deformation and releases the energy to pull the linkage assembly 43 to move, so that the pressing component 41 and the feeding component 42 are restored to the initial state under the driving of the linkage assembly 43, so as to push the printing consumables 10 to the nozzle 2 again. During the process,

[0059] ​The clamping seat 422 of the feeding assembly 42 is moved away from the bottom wall of the feeding channel 4210 by the clamping block 4221 under the action of the second connecting rod 432 of the linkage assembly 43, so as to release the clamping of the printing consumable 10, and ensure that the printing consumable 10 is not pulled back during the resetting process of the feeding assembly 42, thereby ensuring that the nozzle 2 can normally extrude the printing consumable 10 and no extrusion interruption occurs when the feeding mechanism 4 pushes the printing consumable 10 next time.

[0060] The three-dimensional printing pen 100 designed in the utility model has the following advantages:

[0061] First, the feeding amount is convenient to control. The feeding assembly 42 is driven to push the printing consumable 10 to move towards the nozzle 2 by the pressing piece 41, so that the user can flexibly press the pressing piece 41 according to the actual printing demand, and the feeding amount is controlled on demand. For example, when the user draws some fine structure, the pressing piece 41 can be pressed a little to realize accurate small feeding; when it is necessary to quickly fill a large area, the pressing force is appropriately increased to increase the pressing distance, so as to increase the feeding amount; the operation is simple and intuitive, and the user can accurately control the supply of the printing consumable 10.

[0062] Second, immediate operation feedback. Since the pressing operation and the feeding action are directly related, the user can feel the influence of his operation on feeding in real time, so that the pressing force and frequency can be adjusted in time, the feeding process is more in line with the three-dimensional printing creation idea being carried out, and the creation efficiency and work quality are improved.

[0063] Third, the linkage assembly 43 guarantees cooperative work. The linkage assembly 43 mechanically links the pressing piece 41 and the feeding assembly 42, can ensure that the pressing action is accurately converted into the sliding action of the feeding assembly 42, so that the whole feeding process is stable and orderly. As long as the pressing piece 41 is operated as required, the feeding assembly 42 can complete the corresponding feeding action according to the established linkage mechanism, and the feeding failure caused by poor mechanical cooperation and the like is reduced.

[0064] Fourth, high reliability. The resetting assembly 44 can force the feeding assembly 42 to slide away from the nozzle 2, so that the feeding assembly 42 can reliably return to the initial position after each feeding action, and be ready for the next feeding. Through such repeated cycles, it is ensured that the whole feeding mechanism 4 can maintain a stable working state during a long time of use, the problem that the existing electrical feeding mechanism 4 is prone to abnormality after a long time of work is solved, and the overall reliability of the three-dimensional printing pen 100 is improved.

[0065] Fifth, the precision feeding ensures the molding precision. The feeding assembly 42 has a feeding channel 4210 and can accurately send the printing consumable 10 to the nozzle 2 under the pressing and resetting actions, so that the printing consumable 10 can be supplied to the printing area in a suitable amount and at a stable rhythm, which helps to improve the molding precision of the three-dimensional printing product. Whether the printing is of a complex three-dimensional shape or a simple geometric structure, the precise feeding can make the material accumulation of each layer and each part more uniform and accurate, so that the final printing work is closer to the design expectation.

[0066] Sixth, the material supply is good in continuity. Under the cooperation of the linkage assembly 43 and the resetting assembly 44, the feeding assembly 42 can continuously and rhythmically perform the feeding and resetting actions, so as to ensure that the printing consumable 10 is continuously and consecutively supplied to the nozzle 2 to be heated and extruded, avoid the problems of printing interruption, line discontinuity and the like caused by feeding interruption, which affect the printing appearance and structural strength, and thus improve the overall printing effect.

[0067] Seventh, low energy consumption, easy maintenance and low cost. Since the feeding mechanism 4 is a pure mechanical structure, the power consumption of the three-dimensional printing pen 100 is reduced, which helps to improve the endurance of the three-dimensional printing pen 100 and thus improve the user experience. Unlike the traditional electrical feeding mechanism 4 for controlling the feeding of the printing consumable 10, the pure mechanical feeding mechanism 4 is high in reliability, not prone to failure, easy to maintain, low in maintenance and manufacturing cost, and high in safety factor.

[0068] Eighth, small and light. The pressing member 41, the feeding assembly 42, the linkage assembly 43 and the like can all be made of plastic, so that the three-dimensional printing pen 100 is lighter in weight and conducive to miniaturization design.

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

[0070] The difference between the present embodiment and the first embodiment of the three-dimensional printing pen mainly lies in that the structure of the feeding mechanism is different. Specifically, the feeding mechanism of the first embodiment is described in combination with Figures 9 to 12 In the present embodiment:

[0071] The feeding mechanism 9 also includes a pressing member 91, a feeding assembly 92, a linkage assembly 93 and a resetting assembly 94. The pressing member 91 has a second pressing part 911 and a guide part 912. The second pressing part 911 can pass from the inside of the pen body 1 to the outside of the pen body 1 through the avoiding opening on the pen body 1. The guide part 912 has a first guide surface 9121 and a limiting pin 9122. The first guide surface 9121 extends from the second pressing part 911 and is inclined away from the nozzle 2.

[0072] The feeding assembly 92 has a conduit portion 921 parallel to the axial direction of the nozzle 2 and a fitting portion 922 having a second guide surface 9221 parallel to the first guide surface 9121, and the fitting portion 922 is in contact with the first guide surface 9121, so that the pressing member 91 can push the feeding assembly 92 to move towards the nozzle 2 through the first guide surface 9121 and the second guide surface 9221, thereby pushing the printing consumable 10 towards 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 consumable 10, the feeding conduit does not need to be arranged inside the pen body 1 in the embodiment.

[0073] The linkage assembly 93 is fixedly connected with the pen body 1, and 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, and when the pressing member 91 is assembled with the linkage assembly 93, the limiting pin 9122 on the pressing member 91 is slidingly assembled 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, and when the feeding assembly 92 is assembled with the linkage assembly 93, the fitting portion 922 of the feeding assembly 92 is slidingly assembled in the second guide groove 932, so that the linkage assembly 93 can guide and limit the movement of the feeding assembly 92 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 consumable 10 towards the nozzle 2. The second guide groove 932 is located between the two support grooves 933, and 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, and the conduit portion 921 is slidingly assembled in the two support grooves 933, thereby enabling the linkage assembly 93 to support 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 slidingly arranged on the linkage assembly 93, and the linkage assembly 93 is arranged on the pen body 1, the pen body 1 does not need to be provided with a second sliding groove.

[0074] Through the cooperative design of 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, thereby being more ergonomic and facilitating the user to control the extrusion amount of the printing consumable 10 more conveniently and accurately during the use of the three-dimensional printing pen; at the same time, it also avoids the three-dimensional printing pen from shaking and / or shaking during the user controlling the feeding mechanism 9 to push the printing consumable 10, thereby ensuring the precision and aesthetics of the formed work.

[0075] In the embodiment, the reset assembly 94 is a compression spring, the compression spring is sleeved on the conduit portion 921, and the compression spring is in abutment between the linkage assembly 93 and the end of the cooperating portion 922 close to the nozzle 2. Since the presser 91 and the feeding assembly 92 are cooperatively linked through the first guide surface 9121 and the second guide surface 9221, and the linkage assembly 93 is fixedly connected with the pen body 1, the reset of the feeding assembly 92 directly driven by the reset assembly 94 can ensure the reliability of the reset of the feeding assembly 92 and the presser 91 by the reset assembly 94, and is beneficial to optimizing the structural layout of the three-dimensional printing pen.

[0076] In some embodiments, the reset assembly 94 can also be a second tension spring, when the reset assembly 94 is the second tension spring, the second tension spring is preferably sleeved on the conduit portion 921, and the second tension spring is connected between the linkage assembly 93 and the end of the cooperating portion 922 away from the nozzle 2.

[0077] In some embodiments, the feeding assembly 92 further comprises a rubber sleeve 923, the rubber sleeve 923 is sleeved on the end of the conduit portion 921 close to the nozzle 2; wherein the rubber sleeve 923 has a plurality of flexible pieces 9231 distributed along the circumferential direction of the rubber sleeve 923, the plurality of flexible pieces 9231 are distributed in a conical shape, and the proximal end of the conical shape is arranged towards the nozzle 2. By additionally providing the rubber sleeve 923, the free end (i.e. the tip portion) of the flexible piece 9231 can play a role similar to a one-way ratchet during the movement of the feeding assembly 92 pushing the printing consumable 10 towards the nozzle 2, so as to engage with the surface of the printing consumable 10, thereby making the feeding assembly 92 more reliably push the printing consumable 10 to move; it can be understood that during the reset of the feeding assembly 92, the free end of the flexible piece 9231 will slide relative to the surface of the printing consumable 10, so as not to generate a backward pulling force on the printing consumable 10, effectively avoiding the printing consumable 10 from being pulled out of the nozzle 2, preventing the nozzle 2 from normally extruding the printing consumable 10 during the next feeding, and further avoiding the interruption of the extrusion of the printing consumable 10.

[0078] In addition to the above differences, the other structures of the three-dimensional printing pen in the embodiment are basically the same as those of the three-dimensional printing pen in the first embodiment of the three-dimensional printing pen.

[0079] Finally, it should be emphasized that the above description is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. 3D printing pen, including: Pen body; A nozzle, which is mounted at the head of the pen body; A heating unit is installed inside the pen body and located at the nozzle; A control unit is installed inside the pen body and electrically connected to the heating unit; The 3D printing pen is characterized by further including a feeding mechanism, which comprises: The pressing component is movably connected to the pen body; A feeding assembly is movably mounted within the pen body in the axial direction of the nozzle, and the feeding assembly has a feeding channel; A linkage component is mechanically linked between the pressing member and the feeding component, and the pressing member can drive the feeding component to slide toward the nozzle through the linkage component; A reset assembly that can force the feeding assembly to slide away from the nozzle.

2. The 3D printing pen according to claim 1, characterized in that: The pen body is provided with a feeding conduit, which is located between the tail of the pen body and the feeding channel; The pressing member has a connecting rod portion and a first pressing portion. The first end of the connecting rod portion is rotatably mounted inside the pen body, and the second end of the connecting rod portion is connected to the first pressing portion. The first pressing portion can extend from inside the pen body to outside the pen body. The linkage component includes a first link and a second link. The first end of the first link is slidably connected to the link portion along the extension direction of the link portion. The first end of the first link can rotate relative to the link portion and is rotatably connected to the first end of the second link. The second end of the first link is rotatably connected to the guide tube or the pen body. The second end of the first link is inclined away from the first pressing part and extends inclined towards the tail. The second end of the second link is rotatably connected to the feeding component. The reset assembly forces the feeding assembly to slide away from the nozzle via the pressing member and the feeding assembly.

3. The 3D printing pen according to claim 2, characterized in that: The feeding assembly includes: A sliding base, which is slidably connected to the pen body, and the sliding base has the material feeding channel; A clamping seat is rotatably connected to the sliding seat. The clamping seat has a clamping block that 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. When the second connecting rod pushes the feeding assembly to move toward the nozzle, it synchronously drives the clamping block to rotate into the material feeding channel.

4. The 3D printing pen according to claim 3, characterized in that: The clamping block has an arc-shaped groove at one end facing the material feeding channel, and the arc-shaped groove passes through the clamping block along the axial direction, while the material feeding channel is parallel to the axial direction.

5. The 3D printing pen according to claim 2, characterized in that: The reset assembly is a first tension spring, with a first end connected to the first connecting rod and a second end connected to the conduit or the pen body. The reset component is a torsion spring, which is located at the first end of the connecting rod and is connected between the connecting rod and the pen body.

6. The 3D printing pen according to claim 1, characterized in that: The pressing member has a second pressing part and a guide part. The second pressing part can extend from the inside of the pen body to the outside of the pen body. The guide part has a first guide surface and a limiting pin. The first guide surface extends obliquely from the second pressing part away from the nozzle. The feeding assembly has a guide tube portion and a mating portion. The guide tube portion extends along the axial direction, and the mating portion has a second guide surface. The second guide surface is parallel to the first guide surface and contacts the first guide surface. The linkage component is connected to the pen body. The linkage component has a first guide groove, a second guide groove, and two support grooves. The first guide groove is perpendicular to the axial direction. The limiting pin is slidably installed in the first guide groove. The second guide groove is parallel to the axial direction. The mating part is slidably installed in the second guide groove. The second guide groove is located between the two support grooves. The guide tube is slidably installed in the two support grooves.

7. The 3D printing pen according to claim 6, characterized in that: The feeding assembly also includes a rubber sleeve, which is fitted onto one end of the guide tube near the nozzle. The rubber sleeve has multiple flexible sheets spaced apart along its circumference, and the multiple flexible sheets are arranged in a conical shape, with the proximal end of the conical shape facing the nozzle.

8. The 3D printing pen according to claim 6, characterized in that: The reset component is a compression spring, which is fitted onto the guide tube and abuts against the linkage component and the mating part near the nozzle end; or The reset component is a second tension spring, which is fitted onto the guide tube and connected between the linkage component and the end of the mating part away from the nozzle.

9. The 3D printing pen according to any one of claims 1 to 8, characterized in that: The 3D printing pen also includes an input unit, a power supply unit, an interface unit, and a display unit that are electrically connected to the control unit. The input unit, the interface unit, and the display unit are all mounted 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 3D printing pen according to claim 9, characterized in that: The control unit includes a wireless communication module, which includes at least one of a Bluetooth module, a Wi-Fi module, and a star-flash module.

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