Continuous supply device for 3D printer consumables and 3D printer

Abstract

The utility model discloses a 3D printer consumables continuous supply device, including base, buffer module and material supply module, the base is provided with the slide cavity, buffer module includes buffer slider, elastic piece and trigger controller, buffer slider is provided in the slide cavity, buffer slider is provided with feed hole along buffer slider sliding direction, and the elastic piece is provided with the trigger controller. The feeding hole is provided with a feeding port, the feeding module is arranged on the base and provided with a discharging port, the discharging port is detachably connected with the feeding port, the elastic piece is arranged in the sliding cavity and used for buffering resetting of the sliding block so that the feeding port can be connected with the discharging port, and the trigger controller is arranged on the inner wall of the sliding cavity and electrically connected with the feeding module. The trigger controller is used for detecting the position of the buffer sliding block. The position change of the buffer sliding block is detected by triggering the controller to control feeding of the feeding module, so that the consumables are pushed forwards in time, the whole feeding process has the automatic coordination ability, and the abnormal problem that feeding of the 3D printer and pushing of the feeding module are not synchronous is solved.

Description

Technical Field

[0001] This utility model relates to the field of 3D printer technology, and in particular to a continuous supply device for 3D printer consumables and a 3D printer. Background Technology

[0002] Currently, with the rapid development of 3D printing technology, Fused Deposition Modeling (FDM) has become one of the most mainstream 3D printing processes due to its relatively simple equipment structure, low cost, and wide range of compatible materials. It is widely used in industrial manufacturing, education and research, maker development, and personalized customization. FDM printers primarily use heated nozzles to melt and extrude thermoplastic materials, stacking them layer by layer along a predetermined path to transform digital models into physical objects. Current mainstream consumables include PLA, ABS, PETG, and TPU, which are typically wound onto a filament tray in the form of fine filaments of a specific diameter for printing.

[0003] In existing 3D printing processes, the printer uses an extrusion mechanism to draw filament from a reel and feed it into the hot end for heating and melting before printing. However, because filament is consumed, if it runs out during printing, the printing job must be paused. The user must manually remove the depleted filament, reload a new roll, and then re-feed and recalibrate before printing can resume. If the filament is not replaced in time, printing will be interrupted, resulting in noticeable structural defects in the printed parts, such as delamination, cracking, weak bonding, and misalignment. Furthermore, to avoid damaging the printed parts due to filament depletion, most users typically replace the reel before printing, even if the filament is not completely depleted, thus wasting material and increasing costs.

[0004] More importantly, this manual consumable replacement method not only increases the user's workload but also makes it difficult to automate the entire printing process, especially in long-duration, large-volume, or unattended printing jobs. If the pause during replacement is too long, it can lead to localized overcooling at the hot end, causing unstable material melting and defects such as condensation shrinkage or poor adhesion at the printing seams, severely affecting the consistency and strength of the finished product. Utility Model Content

[0005] This invention provides a continuous filament supply device and a 3D printer to solve the technical problem of discontinuous filament supply in existing 3D printers, which leads to a high rate of defective printed products.

[0006] To address the aforementioned technical problems, this utility model provides a continuous filament supply device for a 3D printer, comprising a base, a buffer module, and a feeding module. The base has a sliding cavity. The buffer module includes a buffer slider, an elastic element, and a trigger controller. The buffer slider is slidably disposed within the sliding cavity. The buffer slider has a feeding hole along its sliding direction, and the feeding hole has an inlet. The feeding module is mounted on the base and has an outlet, which is detachably connected to the inlet. The elastic element is disposed within the sliding cavity and is used to reset the buffer slider, connecting the inlet and outlet. The trigger controller is disposed on the inner wall of the sliding cavity and is electrically connected to the feeding module. The trigger controller is used to detect the position of the buffer slider.

[0007] Furthermore, the sliding cavity has grooves on its inner walls on both sides, and the buffer slider has multiple symmetrically arranged openings on its outer walls on both sides. Each opening is provided with a ball protruding from the outer wall of the buffer slider. When the buffer slider is installed in the sliding cavity, the multiple balls roll and are engaged in the two grooves.

[0008] Furthermore, the buffer module also includes a trigger baffle, which is disposed on the outer wall of the buffer slider and corresponds to the trigger controller, which is used to detect the movement position of the trigger baffle.

[0009] Furthermore, the trigger controller includes a first position sensor and a second position sensor, which are spaced apart on the inner wall of the sliding cavity and are both located on the moving path of the trigger baffle. When the trigger baffle moves with the buffer slider, the trigger baffle can block the triggering of the first position sensor and / or the second position sensor.

[0010] Furthermore, there are two feeding modules. The base is provided with a feeding channel and two feeding channels. One end of the feeding channel is connected to the two feeding channels, and the other end is connected to the feeding hole. The two feeding modules are respectively located on the two feeding channels.

[0011] Each of the feeding modules includes a tray and a feeding drive wheel. The tray is rotatably mounted on the top of the base and connected to the corresponding feeding channel. The feeding drive wheel is rotatably mounted above the feeding channel to push the consumables on the tray into the feeding channel through the feeding channel, so that the consumables enter the feeding hole.

[0012] Furthermore, the two feeding channels and the feeding channel form a Y-shaped structure, and the included angle between the two feeding channels is in the range of 20°-60°.

[0013] Furthermore, an annular groove is formed on the outer ring surface of the feeding drive wheel, which is opposite to the feeding channel. An extrusion hole is formed between the annular groove and the feeding channel. When the consumable enters the extrusion hole, the feeding drive wheel will drive the consumable to move along the feeding channel.

[0014] Furthermore, it also includes a cutting module, which includes a cutting blade, a blade holder, and a cutting blade drive wheel. The cutting blade drive wheel is rotatably mounted on the base. One end of the blade holder is hinged to the base, and the other end spans the feeding channel and is rotatably connected to the cutting blade drive wheel. The cutting blade is mounted on the blade holder. The base has an inlet that is opposite to the cutting blade, and the inlet extends laterally and penetrates the inner wall of the feeding channel so that the cutting blade cuts the consumables in the feeding channel along the direction of the inlet.

[0015] Furthermore, the cutter drive wheel includes a drive cam and a drive shaft eccentrically mounted on the drive cam. The cutter bar has an elongated hole, and the drive shaft passes through the elongated hole. The drive cam drives the drive shaft to slide in the elongated hole, thereby causing the cutter bar to swing.

[0016] On the other hand, the present invention also provides a 3D printer, including the supply device described in any of the foregoing claims.

[0017] Compared with the prior art, the beneficial effects of this utility model embodiment of a continuous filament supply device and 3D printer are as follows:

[0018] This utility model embodiment cleverly constructs a dynamic and responsive continuous feeding system by setting a feeding module on the base and connecting it to one end of the feeding hole of the buffer module. Combined with a buffer slider, elastic element, and trigger controller, this system achieves filament buffering, compensation, and dynamic control functions. When the 3D printer needs to feed material during printing, the feeding module pushes the filament from its outlet into the feeding hole of the buffer slider. Due to inertia, the filament causes the buffer slider to move forward and stretch the elastic element, thus completing the feeding and initial buffering of the filament. As the printing task continues, the filament in the buffer gradually decreases, and the buffer slider retracts to its original position under the restoring force of the elastic element. At this time, the trigger controller monitors the forward or retracted state of the buffer slider in real time and controls the feeding module's material supply by judging its positional changes, so as to achieve timely forward material pushing. This gives the entire feeding process adaptive response and automatic coordination capabilities, effectively preventing abnormal feeding pressure caused by asynchronous feeding between the 3D printer side and the feeding module. In summary, this solution, by constructing a multi-coordinated mechanism of "buffer compensation + intelligent detection + dual-source feeding," not only overcomes the technical bottlenecks of existing technologies such as feeding interruption and inconvenient consumable switching, significantly improving the feeding reliability and system stability of 3D printing equipment under continuous printing and long-term operation, but also effectively extends the equipment operating cycle, improves printing efficiency and job success rate, and reduces the defect rate of printed products without significantly increasing structural complexity and manufacturing costs. This provides solid and reliable technical support for the widespread application of 3D printers in industrial production and complex model manufacturing.

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0020] The accompanying drawings are provided for a better understanding of this solution and do not constitute a limitation on this utility model. Wherein:

[0021] Figure 1 This is a schematic diagram of the continuous supply device for 3D printer consumables provided in an embodiment of the present invention from one angle.

[0022] Figure 2 This is a schematic diagram of the continuous supply device for 3D printer consumables provided in this embodiment of the utility model from another angle.

[0023] Figure 3 This is a schematic diagram of the structure of the 3D printer consumable continuous supply device after removing the material tray and support frame, provided in this embodiment of the utility model.

[0024] Figure 4This is a schematic diagram of the 3D printer consumable continuous supply device provided in this embodiment of the present invention after removing the material tray and support frame, showing another angle of the structure.

[0025] Figure 5 This is a schematic diagram of the 3D printer consumable continuous supply device provided in this embodiment of the present invention after removing the material tray and support frame from another angle.

[0026] Figure 6 yes Figure 5 Schematic diagram of the cross section in the middle BB direction;

[0027] Figure 7 This is a schematic diagram of the buffer module at one angle in the continuous supply device for 3D printer consumables provided in this embodiment of the utility model.

[0028] Figure 8 This is a structural schematic diagram of the buffer module in the continuous supply device for 3D printer consumables provided in this embodiment of the present invention from another angle.

[0029] Figure 9 This is a schematic diagram showing the state of the trigger controller detecting the position of the trigger baffle in the buffer module of the continuous supply device for 3D printer consumables provided in this embodiment of the utility model.

[0030] Figure 10 yes Figure 3 A magnified view of a portion of point A in the middle;

[0031] Figure 11 This is a schematic diagram of the buffer module and the cutter module in the continuous supply device for 3D printer consumables provided in this embodiment of the utility model;

[0032] Figure 12 This is a schematic diagram of the blade holder of the cutting module in the continuous supply device for 3D printer consumables provided in this embodiment of the utility model;

[0033] Figure 13 This is a schematic diagram of the cutter drive wheel of the cutter module in the continuous supply device for 3D printer consumables provided in this embodiment of the present invention at an angle.

[0034] Figure 14 This is a structural schematic diagram of the cutter drive wheel of the cutter module in the continuous supply device for 3D printer consumables provided in this embodiment of the utility model at another angle.

[0035] In the diagram, 10 is the base; 11 is the sliding cavity; 12 is the chute; 13 is the feeding channel; 14 is the feeding channel; 15 is the inlet; 20 is the feeding module; 21 is the material tray; 22 is the feeding drive wheel; 221 is the annular groove; 23 is the feeding drive motor; 24 is the insertion detection sensor; 25 is the consumable presence sensor; 26 is the feeding pipe; 30 is the buffer module; 31 is the buffer slider; 311 is the feeding hole; 312 is the opening; 32 is the elastic element; 33 is the contact. Controller; 331, First position sensor; 332, Second position sensor; 34, Trigger baffle; 35, Ball bearing; 36, Feed tube; 40, Cutter module; 41, Cutter; 42, Cutter bar; 421, Long slot; 43, Cutter drive wheel; 431, Drive cam; 432, Drive shaft; 433, Detection baffle; 44, Cutter drive motor; 45, Cutter fixing nut; 46, Cutter bar shaft; 47, Cutter detection sensor; 50, Support frame. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0037] In the description of this utility model, it should be noted that the directional terms such as "middle", "upper", "lower", "inner", "outer", "vertical", "lateral", "vertical", and "horizontal" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0039] In this utility model, the terms "installation," "setting," "connection," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Indications of orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. "A plurality" means two or more, unless otherwise explicitly defined. "Several" means one or more, unless otherwise explicitly defined.

[0040] like Figure 1-8 As shown, this utility model embodiment provides a continuous filament supply device for a 3D printer, including a base 10, a buffer module 30, and a feeding module 20. The base 10 has a sliding cavity 11. The buffer module 30 includes a buffer slider 31, an elastic element 32, and a trigger controller 33. The buffer slider 31 is slidably disposed in the sliding cavity 11. The buffer slider 31 has a feeding hole 311 along the sliding direction of the buffer slider. The feeding hole 311 has a feed inlet. The feeding module 20 is disposed on the base 311 and has a discharge outlet. The discharge outlet is detachably connected to the feed inlet. The elastic element 32 is disposed in the sliding cavity 11 and is used to reset the buffer slider 31 so that the feed inlet and the discharge outlet are connected. The trigger controller 33 is disposed on the inner wall of the sliding cavity 11 and is electrically connected to the feeding module 20. The trigger controller 33 is used to detect the position of the buffer slider 31.

[0041] This utility model embodiment cleverly constructs a dynamic response continuous feeding system by setting two feeding modules 20 on the base 10 and connecting them together to one end of the feeding hole of the buffer module 30, and cooperating with the buffer slider 31, elastic element 32 and trigger controller 33, so as to realize the functions of buffering, compensation and dynamic control of consumables. When the 3D printer needs to feed material during the printing process, the feeding module 20 pushes the filament from its outlet into the feed port 311 of the buffer slider 31. Due to inertia, the filament drives the buffer slider 31 forward and stretches the elastic element 32, thereby completing the feeding and initial buffering of the filament. As the printing task continues, the filament in the buffer (feed port 311) gradually decreases, and the buffer slider 31 retracts to its original position under the restoring force of the elastic element 32. At this time, the trigger controller 33 monitors the forward extension or retraction state of the buffer slider 31 in real time, and controls the start and stop timing of the feeding module 20 by judging its position change, so as to realize the timely forward pushing of the filament, so that the entire feeding process has adaptive response capability and automatic coordination capability, effectively preventing the abnormal feeding pressure caused by the asynchronous feeding of the 3D printer side and the feeding of the feeding module 20. In summary, this solution, by constructing a multi-coordinated mechanism of "buffer compensation + intelligent detection + dual-source feeding," not only overcomes the technical bottlenecks of existing technologies such as feeding interruption and inconvenient consumable switching, significantly improving the feeding reliability and system stability of 3D printing equipment under continuous printing and long-term operation, but also effectively extends the equipment operating cycle, improves printing efficiency and job success rate, and reduces the defect rate of printed products without significantly increasing structural complexity and manufacturing costs. This provides solid and reliable technical support for the widespread application of 3D printers in industrial production and complex model manufacturing.

[0042] The feeding module 20 is used to push consumables into the feeding hole 311. One end of the elastic element 32 is set on the base 10, and the other end is connected to the buffer slider 31 to control the return of the buffer slider 31. The trigger controller 33 is set on the inner wall of the sliding cavity 11 and is electrically connected to the feeding module 20. The trigger controller 33 is used to detect the position of the buffer slider 31. When the consumables enter the feeding hole 311, the feeding module 20 will drive the buffer slider 31 to slide away from the feeding module 20 along the sliding cavity 11 through the consumables. The elastic element 32 will drive the buffer slider 31 to return to its original position along the sliding cavity 11 towards the feeding module 20, so as to trigger the trigger controller 33 to control the feeding of the feeding module 20. During the printing process of a 3D printer, due to the intermittent and time-delayed nature of its fused deposition modeling (FDM) process, the filament is not consumed continuously and stably. Therefore, the feeding module 20 cannot always be in a pushing state to avoid jamming or blockage caused by excessively rapid feeding. This results in a lack of synchronization between the feeding side of the 3D printer and the pushing side of the feeding module 20. To solve the technical problem of timely pushing of the filament when the 3D printer needs to feed, and to match the rhythm of feeding action with filament consumption, a trigger controller 33 is set in the buffer module 30 to monitor the extension and retraction status of the buffer slider 31. When the 3D printer continuously consumes filament, causing the buffer slider 31 to retract under the restoring force of the elastic element 32, the trigger controller 33 detects its position change in real time and outputs a control signal to drive the feeding module 20 to start as needed. This achieves adaptive coordination between feeding behavior and the printing task progress, avoids overfeeding or underfeeding, and improves the overall stability of the feeding system. In this way, the system can monitor the status of consumables in the buffer zone in real time and intelligently coordinate the feeding and consuming behaviors on both sides. This ensures the continuity and stability of material supply during the printing process and effectively prevents the problem of material imbalance caused by pushing the material too fast or too slow. It is an important technical means to realize a dynamic response feeding mechanism.

[0043] For example, the trigger controller 33 described above can take various forms according to actual needs, including but not limited to: a slotted photoelectric sensor, such as a slotted photoelectric switch set on the inner wall of the sliding cavity 11, which blocks or releases the beam of light emitted by the transmitting end when the buffer slider 31 moves to the slot on the slotted photoelectric switch, thereby triggering the detection signal of the slotted photoelectric switch to determine whether the buffer slider 31 is in the pushing or retracting state; a magnetic induction sensor (such as a Hall element), in which a permanent magnet is set on the buffer slider 31 and a Hall sensor is set in the sliding cavity 11, which identifies the buffer slider 31 by the change of magnetic field. The movement direction and amplitude of the buffer slider 31 are controlled by a mechanical limit switch, which sets limit contacts at the forward extension end and the retraction end of the buffer slider 31. When the buffer slider 31 touches the set position, the switch is triggered and a feedback signal is sent to achieve basic two-position recognition. A displacement sensor, such as a potentiometer or linear encoder, continuously and quantitatively measures the sliding stroke of the buffer slider 31 to achieve high-precision position judgment. A grating sensor, combined with an encoding strip and a photoelectric scanner, performs high-resolution reading of the relative displacement of the buffer slider 31, which is suitable for occasions with high requirements for the accuracy of material feeding rhythm control. The above-mentioned multiple detection methods can be flexibly configured according to the performance requirements, cost control and accuracy requirements of the printing equipment, ensuring that this utility model achieves stable and reliable synchronous material feeding control without significantly increasing structural complexity, effectively improving the continuity of 3D printing tasks, printing success rate and overall system operating efficiency.

[0044] To ensure a stable and continuous supply of consumables and to guarantee sufficient extension length within the limited travel of the buffer slider 31, a feeding tube 36 is typically added inside the feeding hole 311 that runs through the buffer slider 31. One end of this feeding tube 36 connects to the outlet of the feeding module 20, and the other end connects to the inlet of the printer, guiding the consumables through a smooth transition. Since the buffer slider 31 can only reciprocate within a certain range within the sliding cavity 11, the opening length of the feeding hole 311 alone may not be sufficient to meet the extension required by the consumables during the slider's forward and backward movement, leading to problems such as tension, jamming, or even breakage of the consumables. The feeding tube 36 effectively buffers the tension fluctuations of the consumables caused by the movement of the slider 31, thereby compensating for changes in the consumable path caused by the displacement of the buffer slider 31.

[0045] It should be noted that in this embodiment, one end of the elastic element 32 is fixed to the base 10, and the other end extends into the sliding cavity 11 and connects to the buffer slider 31. The elastic element 32 is preferably a spring, chosen because the spring can provide a stable and adjustable restoring force to the buffer slider 31. The spring can be a compression spring or a tension spring, and can be set at different positions on the base 10 according to actual needs for the restoring of the buffer slider 31. In the optional embodiment of this utility model, a tension spring is preferred, that is, the fixed end of the tension spring is set on the base 10 near the feeding module 20, and the other end is set on the buffer slider 31. Of course, two tension springs can also be symmetrically set on both sides of the buffer slider 31. The springs can be flexibly set according to actual needs, which will not be described in detail here.

[0046] When the filament is consumed by the 3D printer, the buffer slider 31 retracts to its original position under the restoring force of the spring. The spring is partially compressed and stores a certain amount of elastic potential energy. When the buffer slider 31 retracts to a certain extent, the trigger controller 33 is activated, controlling the feeding module 20 to start the feeding action, pushing the filament forward. At the same time, the restoring force of the spring begins to release, which can also drive the buffer slider 31 forward, releasing the compressed state and providing additional thrust to cooperate with the feeding action of the feeding module 20, promoting stable delivery of the filament. This design not only effectively buffers the instantaneous impact caused by fluctuations in the feeding rhythm during the printing process and maintains stable tension in the feeding path, but also ensures that the filament is always in a state that the printer can smoothly obtain, achieving dynamic balance and continuous stability in filament supply, effectively improving print quality and system reliability.

[0047] like Figure 3-8 As shown, in an optional embodiment of this utility model, the sliding cavity 11 has grooves 12 on its inner walls on both sides, and the buffer slider 31 has a plurality of symmetrically arranged openings 312 on its outer walls on both sides. Each opening 312 is provided with a ball 35 protruding from the outer wall of the buffer slider 31. When the buffer slider 31 is installed in the sliding cavity 11, the plurality of balls 35 roll and are engaged in the two grooves 12.

[0048] Specifically, by creating grooves 12 on the inner walls of opposite sides of the sliding cavity 11 and providing multiple symmetrical openings 312 on the outer walls of opposite sides of the buffer slider 31, each opening 312 houses a ball bearing 35 protruding from the outer wall of the slider. This allows the ball bearings 35 to roll and engage in the corresponding grooves 12 after the buffer slider 31 is installed into the sliding cavity 11. The ball bearings 35 create rolling contact between the buffer slider 31 and the grooves 12, significantly reducing the frictional resistance generated by traditional sliding contact. This effectively improves the flexibility and response speed of the buffer slider 31 within the sliding cavity 11, facilitating rapid feedback to changes in the position of consumables. Simultaneously, the ball bearings 35 reduce wear during slider operation, extend component lifespan, and enhance system stability and reliability, providing crucial assurance for efficient and stable material feeding.

[0049] In this embodiment, the number of balls 35 can be selected as four, which are respectively arranged in the front and rear openings 312 on the outer walls of both sides of the buffer slider 31, that is, two balls 35 are arranged on each side. Through this symmetrical arrangement, stable and effective guidance and support can be achieved while ensuring structural simplicity, so that the buffer slider 31 can move smoothly along the slide groove 12 in the sliding cavity 11.

[0050] like Figure 7 As shown, in an optional embodiment of the present invention, the buffer module 30 further includes a trigger baffle 34, which is disposed on the outer wall of the buffer slider 31 and corresponds to the trigger controller 33. The trigger controller 33 is used to detect the moving position of the trigger baffle 34.

[0051] Specifically, by adding a trigger baffle 34 to the buffer module 30 and placing it on the outer wall of the buffer slider 31, allowing it to work in conjunction with the trigger controller 33, the structural design of the trigger controller 33 is simplified, and the accuracy and response efficiency of the detection are significantly improved. The trigger baffle 34 moves synchronously during the movement of the buffer slider 31, serving as a clear and focused identification target, enabling the trigger controller 33 to quickly and accurately determine the current state of the buffer slider 31 (such as extending or retracting to a predetermined position). This design achieves precise control of the detection trigger point by setting the position and size of the trigger baffle 34, thereby improving detection accuracy; simultaneously, since the trigger controller 33 only needs to identify the trigger baffle 34 rather than the entire buffer slider 31, the response speed is improved. Structurally, the localized trigger baffle 34 is simpler and more reliable than a large-area arrangement of sensing elements on the surface of the buffer slider 31, facilitating assembly and maintenance and contributing to system stability. Furthermore, the structural parameters of the trigger baffle 34 can be flexibly adjusted according to application requirements, making it suitable for various types of sensors (such as photoelectric, magnetic, and limit sensors), exhibiting good adaptability and versatility. In summary, the combined use of the trigger baffle 34 and the trigger controller 33 not only effectively improves detection accuracy and response efficiency but also provides stable, sensitive, and intelligent operational assurance for the entire material feeding control system.

[0052] like Figure 7-9 As shown, in an optional embodiment of the present invention, the trigger controller 33 includes a first position sensor 331 and a second position sensor 332. The first position sensor 331 and the second position sensor 332 are spaced apart on the inner wall of the sliding cavity 11 and are both located on the moving path of the trigger baffle 34. When the trigger baffle 34 moves with the buffer slider 31, the trigger baffle 34 can block the triggering of the first position sensor 331 and / or the second position sensor 332.

[0053] Specifically, by setting the trigger controller 33 as a first position sensor 331 and a second position sensor 332, and installing these two sensors at a preset distance on the inner wall of the sliding cavity 11, while arranging them within the moving path range of the trigger baffle 34 on the buffer slider 31, high-precision dynamic monitoring of the operating status of the buffer slider 31 is achieved. During the movement of the buffer slider 31 with the consumable material, the trigger baffle 34 will block or release the first position sensor 331 and the second position sensor 332 as the buffer slider 31 moves, thus forming four identifiable state combinations. The second position sensor 332 is located between the first position sensor 331 and the buffer module 30; that is, the first position sensor 331 is located at the discharge end of the sliding cavity 11 near the 3D printer side, and the second position sensor 332 is located at the feed end of the sliding cavity 11 near the feeding end of the feeding module 20. Each position sensor only exists in two states at any given time: "blocked" or "not blocked." Therefore, the combination of these two states can clearly distinguish the different working stages of the buffer slider 31, achieving precise control and dynamic management of the feeding process of the feeding module 20. For a detailed testing process, please refer to the diagram. Figure 9 -A, B, C, D), the trigger baffle 34 corresponds to the four key position states of the trigger controller 33 (first position sensor 331 and second position sensor 332) as follows:

[0054] State A (both the first position sensor 331 and the second position sensor 332 are not obstructed):

[0055] State A indicates that the buffer slider 31 is at its final retraction limit position, at which point both sensors are fully exposed and not obstructed by the trigger baffle 34. This typically occurs after the consumables are exhausted. The buffer slider 31 retracts rapidly under the drive of the elastic element 32. Due to the inertia of the slider's movement, the elastic element (such as a compression spring) is further compressed, causing the slider to briefly reach its rearmost position. This state indicates that the buffer zone has not yet entered the effective feeding section. The system identifies this as the "waiting for feeding" stage and can immediately start the feeding module 20 to perform the next round of pushing operation, advancing the buffer slider 31 to the feeding position (State C).

[0056] State B (First position sensor 331 is not blocked, second position sensor 332 is blocked):

[0057] State B indicates that when the 3D printer is operating normally, the filament in the buffer zone (feed tube 36) is gradually consumed, and the buffer slider 31 gradually retracts under the pulling force of the elastic element 32. At this time, the trigger baffle 34 blocks the second position sensor 332 but does not block the first position sensor 331, indicating that the buffer slider 31 has slightly retreated from the end of the feeding process and entered the intermediate monitoring section. This state usually represents that there is still filament remaining in the buffer zone but it is close to being consumed. The system identifies it as a "monitoring" state, and the feeding module 20 can decide whether to perform another feeding operation based on conditions (such as extruder signals or filament quantity) to maintain continuous feeding.

[0058] State C (both position sensor 331 and position sensor 332 are blocked):

[0059] State C indicates that the feeding module 20 has completed a valid feeding action. The buffer slider 31 is pushed forward by the filament to the feeding limit position, triggering the baffle 34 to block the two sensors. At this time, the buffer is full of filament, with sufficient material reserves for the 3D printer to continue feeding. The system recognizes this as a "feeding complete" state, and the feeding module 20 will pause its operation until the filament is consumed again to the critical state that triggers the next feeding cycle (such as B or A). This is the "full" signal in the entire control logic, effectively ensuring timely feeding.

[0060] State D (First position sensor 331 is blocked, second position sensor 332 is not blocked):

[0061] State D represents the "abnormal ejection identification state" in the entire system. It mainly occurs when the 3D printer exhibits abnormal behavior, such as reverse ejection triggered by factors like material jamming, nozzle blockage, or program-controlled ejection. In this situation, the 3D printer pulls the filament back in the reverse direction, causing the buffer slider 31 to move backward. However, due to movement path limitations or the design of the trigger baffle 34, the buffer slider 31 releases its obstruction of the second position sensor 332 before fully retracting to the middle or end section (state B or A), while still obstructing the first position sensor 331, forming a sensor combination in state D. In this state, there is a risk of overlap or confusion between the sensor combination and the state in the normal operating process. Sensor signals alone cannot determine whether it is "refeeding completed" or "abnormal ejection." Therefore, the system needs to combine other external control parameters (such as the current working direction of the feeding module and motor control signals) for logical judgment to identify this state as "abnormal ejection" rather than "feeding completed." The feeding module 20 should not advance the filament at this time to avoid material accumulation or pushing conflicts due to misjudgment.

[0062] The core advantage of the entire detection mechanism lies in its clear and determinable state. The four state combinations can clearly define the different positions and action stages of the buffer slider 31 in the feeding process. The first position sensor 331 and the second position sensor 332 achieve efficient feedback through simple blockage and unblocking logic, resulting in sensitive and accurate responses and significantly reducing misjudgments and delays. Furthermore, combined with external control signals, the system can accurately distinguish between normal and abnormal material ejection, improving overall robustness. This detection method also possesses good modularity and expandability, adapting to different slider strokes and diverse application requirements. In summary, this structure, through the combined design of the first position sensor 331, the second position sensor 332, and the trigger baffle 34, constructs a highly sensitive, low-complexity, and highly adaptable buffer position detection scheme, effectively ensuring the precise control of the feeding module 20 and the stability of system operation.

[0063] The first position sensor 331 and the second position sensor 332 preferably employ slot-type photoelectric switches. These sensors are compact, have a fast response time, and high sensitivity, enabling accurate detection of the occlusion state of the trigger baffle 34. The slot-type photoelectric switch transmits a light beam through its transmitter and receives it through its receiver. When the trigger baffle 34 enters or leaves the optical path between the transmitter and receiver of the sensor, precise switching signal conversion is achieved, making it suitable for efficient and stable detection of the position of the buffer slider 31 within the limited space of the sliding cavity 11. Furthermore, the slot-type photoelectric switch is easy to install, has strong anti-interference capabilities, and can meet the high reliability requirements of position detection in 3D printing feeding systems.

[0064] like Figure 3-6 As shown, in an optional embodiment of this utility model, there are two feeding modules 20. The base 10 is provided with a feeding channel 14 and two feeding channels 13. One end of the feeding channel 14 is connected to the two feeding channels 13, and the other end is connected to the feeding hole 311. The two feeding modules 20 are respectively disposed on the two feeding channels 13.

[0065] Each feeding module 20 includes a material tray 21 and a feeding drive wheel 22. The material tray 21 is rotatably mounted on the top of the base 10 and connected to the corresponding feeding channel 13. The feeding drive wheel 22 is rotatably mounted above the feeding channel 13 to push the consumables on the material tray 21 into the feeding channel 14 through the feeding channel 13 so that the consumables can enter the feeding hole 311.

[0066] Specifically, by rationally arranging a feeding channel 14 and two feeding channels 13 on the base 10, one end of the feeding channel 14 merges with the two feeding channels 13, and the other end connects to the feeding hole 311, a smooth consumable conveying path is formed. Two feeding modules 20 are respectively installed on their respective feeding channels 13. Each feeding module 20 includes a tray 21 and a feeding drive wheel 22. The tray 21 is installed on the top of the base 10, can rotate freely, and is connected to the corresponding feeding channel 13 through a feeding pipe 26, ensuring that consumables can be continuously conveyed to the inlet of the feeding channel 13. The feeding drive wheel 22 is located above the feeding channel 13, and by rotating, it drives the consumables forward, stably and accurately pushing the consumables on the tray 21 into the feeding channel 14, ensuring that the consumables can smoothly enter the feeding hole 311. The feeding drive wheel 22 achieves continuous and controlled propulsion through direct contact with the consumables, avoiding the accumulation or jamming of consumables, effectively ensuring the stability and continuity of the feeding process, and improving the feeding efficiency and reliability of the entire system.

[0067] The system incorporates two feeding modules 20 with a dual-source feeding switching design, primarily based on a comprehensive consideration of meeting the continuous feeding requirements of 3D printers and effectively saving costs. By having the two feeding modules 20 work alternately, the system achieves seamless switching and continuous feeding of consumables. When the consumables stored in one feeding module 20 are about to run out, it automatically switches to the other, avoiding material interruptions caused by excessively long material changeover times during printing. This ensures the continuity and stability of printing tasks, meeting the needs of industrial production and long-term printing of complex models. Compared to multi-module systems, the two feeding modules 20 offer advantages in terms of hardware cost, manufacturing difficulty, and equipment space occupation, maximizing resource savings while maintaining performance. When the consumables in one feeding module 20 are depleted, the user only needs to replace the consumables in that module, and the system can then continue feeding from the other module, avoiding frequent downtime for material changes, improving production efficiency, and simplifying maintenance. Therefore, the design of using two feeding modules 20 not only ensures the continuity and stability of the feeding, but also takes into account the simplicity of the equipment structure, the convenience of control and the rationality of manufacturing costs, fully meeting the actual application needs of 3D printing and achieving the best balance between performance and cost.

[0068] In addition, each feeding module 20 is further equipped with an insertion detection sensor 24 and a consumable presence sensor 25 to intelligently identify and manage the real-time status of consumables entering the feeding channel 13. Both the insertion detection sensor 24 and the consumable presence sensor 25 are located on the feeding channel 13. The insertion detection sensor 24 is positioned between the tray 21 and the feeding drive wheel 22, and is used to detect in real-time when consumables are inserted into the feeding channel 13 from the tray 21. Once it is detected that consumables have entered the feeding channel 13 through the feeding pipe 26, the control system automatically starts the feeding drive wheel 22 to suck in the consumables and guide them into the feeding process, achieving an "insert and feed" intelligent feeding function. The consumable presence sensor 25 is located on the side of the feeding drive wheel 22 away from the insertion detection sensor 24. It is used to detect whether there is consumable ready in the current feeding channel 13, that is, whether the consumable has passed through the pressing position of the feeding drive wheel 22. This ensures that the consumable is in a state where it can be output by the feeding drive wheel 22 before the system performs the pushing operation. Through the synergistic effect of these two sensors, dual confirmation of consumable insertion and preparation status can be achieved, effectively preventing feeding abnormalities caused by empty material or no insertion, and greatly improving the intelligence, stability and ease of use of the system's feeding.

[0069] Both the insertion detection sensor 24 and the consumable presence sensor 25 preferably employ slot-type photoelectric switches, which offer advantages such as fast response, compact structure, and convenient installation. The insertion detection sensor 24 and the consumable presence sensor 25 form a dual monitoring mechanism that works in tandem, intelligently determining the initial insertion of the consumable and confirming whether it has successfully passed through the feeding drive area, achieving full-process, full-node detection of the consumable's status. This collaborative solution not only significantly improves the system's automation level and ease of use but also effectively ensures the stability and reliability of the feeding process, providing a solid foundation for precision applications such as 3D printing.

[0070] It should be noted that, in order to further improve the overall stability and ease of operation of the supply device, this embodiment of the invention also includes a frame-type support frame 50 composed of multiple frames, with the base 10 securely installed inside the frame, achieving a reasonable optimization of the layout of the material tray 21 and the base 10. The material tray 21 can be mounted on the top of the support frame 50 using a rotating shaft, but this embodiment preferably uses a roller support structure to place the material tray 21. Unlike the traditional method of using a rotating shaft passing through the middle of the material tray 21, this solution preferably equips each material tray 21 with two rollers spaced at a relative distance, forming a passive rolling structure. The material tray 21 does not require an external power device; it is only driven to rotate synchronously by friction when the feeding drive wheel 22 pulls the consumables below, thereby achieving automatic feeding. The dual-roller stable support effectively avoids shaking and jumping caused by bearing eccentricity or uneven friction, improving the stability of the material tray 21. Secondly, the smooth rotation of the rollers reduces the vibration of the material tray 21, preventing consumables from bending, jamming, or excessive friction due to vibration, ensuring that consumables smoothly enter the feeding channel 13. Therefore, the passive rotation design of the support frame 50 and the rollers not only achieves reasonable support for the base 10 and the material tray 21, but also significantly improves the operational stability of the material tray 21 and the continuity of consumable supply, effectively avoiding shaking and jamming problems caused by insufficient structural design, thereby ensuring the efficient and reliable operation of the entire feeding system.

[0071] like Figure 6 As shown, in an optional embodiment of this utility model, the two feeding channels 13 and the feeding channel 14 form a Y-shaped structure, and the included angle between the two feeding channels 13 is in the range of 20°-60°.

[0072] Specifically, by arranging the two feeding channels 13 and the feeding channel 14 in a Y-shape with the axis of the feeding channel 14 as the axis of symmetry, and designing the included angle between the two feeding channels 13 to be within a reasonable range of 20° to 60°, consumables from two different trays 21 can naturally converge in space into the common feeding channel 14. This not only effectively improves the smoothness of the feeding path but also significantly enhances the stability and continuity of the system operation. The setting of the included angle range between the two feeding channels 13 is particularly critical: if the included angle is too small (close to 20°), the feeding path is too gentle, and consumables may accumulate or be pushed back at the confluence due to insufficient kinetic energy; if the included angle is too large (close to 60°), the feeding direction will deviate too drastically, increasing feeding resistance and affecting smoothness. After structural simulation and actual verification, the preferred included angle in this embodiment is 32.4°, which achieves an ideal balance between propulsion efficiency and structural compactness. Specifically, the 32.4° angle between the two feeding channels 13 ensures a smooth transition of consumables when entering the feeding channel 14, significantly reducing the risk of jamming and back pressure. Simultaneously, it makes the propulsion direction of the feeding drive wheel 22 more directional, resulting in lower energy loss. Furthermore, the reasonable angle setting effectively reduces mechanical wear and collision frequency at the feeding nodes, thereby extending the service life of system components and enhancing the long-term reliability of the equipment. Therefore, adopting a Y-shaped channel structure with a preferred 32.4° angle not only achieves an efficient and smooth feeding path design but also provides a solid structural guarantee for stable system operation and reliable consumable delivery.

[0073] like Figure 10 As shown, in an optional embodiment of this utility model, an annular groove 221 is provided on the outer ring surface of the feeding drive wheel 22, which is opposite to the feeding channel 13. An extrusion hole is formed between the annular groove 221 and the feeding channel 13. When the consumable enters the extrusion hole, the rotation of the feeding drive wheel 22 drives the consumable to move along the feeding channel 13.

[0074] Specifically, an annular groove 221 corresponding to the feeding channel 13 is formed on the outer ring surface of the feeding drive wheel 22. The corresponding part of the feeding channel 13 and the annular groove 221 is usually also an open groove structure. A narrow extrusion hole area is formed between the annular groove 221 and the feeding channel 13. When the consumable enters the extrusion hole area, the feeding drive wheel 22 can stably push the consumable along the feeding channel 13 through the extrusion friction generated by its rotation. On the one hand, the setting of the annular groove 221 significantly increases the contact area between the drive wheel and the consumable, making the thrust more uniform and lasting, enhancing the stability of the feeding process, and effectively avoiding slippage or jamming. On the other hand, by reasonably controlling the size of the extrusion hole, the force on the consumable can be finely adjusted, improving the feeding accuracy and meeting the requirements for feeding speed and consistency under different printing conditions. At the same time, the extrusion hole also has good adaptability and can be compatible with consumables of various diameters and materials. Quick matching can be achieved by appropriately adjusting the geometric parameters. In summary, the annular groove 221 extrusion structure not only improves the feeding efficiency and reliability of the system, but also provides stable, adjustable and universal core support for the high-performance operation of the feeding module 20.

[0075] Although the feeding drive wheel 22, in conjunction with the annular groove 221, already possesses stable and precise propulsion capabilities, the buffer module 30 remains indispensable in the entire supply system. Its role is not only to connect the feeding module 20 and the printer as an intermediate transition zone, but also to ensure the efficient and safe operation of the system. Firstly, the buffer module 30 effectively eliminates inconsistencies in the feeding rhythm between the feeding module 20 and the printer, avoiding "empty push" or "jamming" phenomena caused by asynchrony, ensuring a continuous and stable supply of consumables to the printing end. Secondly, it absorbs the reverse pulling impact during printing, such as the reaction force generated during material ejection or shrinkage operations, preventing such fluctuations from being transmitted to the feeding mechanism, thereby reducing the risk of failure and extending component life. More importantly, the buffer module 30 reduces the requirement for frequent responses from the feeding system, allowing the feeding mechanism to operate intermittently as needed, significantly reducing energy consumption and mechanical wear. Therefore, even though the feeding module 20 itself has good feeding capabilities, the buffer module 30 is still a key design to improve the stability, adaptability and operating efficiency of the entire system. The multiple benefits it brings, such as rhythm regulation, impact mitigation and intelligent control, are an indispensable part of any high-performance 3D printing feeding system.

[0076] It should be noted that, to improve the sealing and operational stability of the feeding system, three functional cover plates are provided on the base 10, including a feeding wheel cover plate, a channel cover plate, and a buffer cover plate. The feeding wheel cover plate is used to close the feeding drive wheel 22, preventing foreign objects from entering and ensuring personnel safety; the channel cover plate closes the feeding channel 14 and the two feeding channels 13, effectively preventing consumables from slipping out of the slot due to vibration or rebound, thus affecting the consumables' propulsion; the buffer cover plate covers the sliding cavity 11, preventing impurities from entering and affecting the movement of the buffer slider 31, ensuring a smooth and reliable feeding process.

[0077] like Figure 11-14 As shown, in an optional embodiment of this utility model, a cutting module 40 is also included. The cutting module 40 includes a cutting blade 41, a blade shank 42, and a cutting blade 41 drive wheel. The cutting blade 41 drive wheel is rotatably mounted on the base 10. One end of the blade shank 42 is hinged to the base 10, and the other end is rotatably connected to the cutting blade 41 drive wheel after crossing the feeding channel 14. The cutting blade 41 is mounted on the blade shank 42. The base 10 has an inlet 15 that is opposite to the cutting blade 41, and the inlet 15 extends laterally and penetrates the inner wall of the feeding channel 14 so that the cutting blade 41 cuts the consumables in the feeding channel 14 along the direction of the inlet 15.

[0078] Specifically, a cutter module 40 is installed on the base 10. This module includes a cutter 41, a cutter bar 42, and a drive wheel for the cutter 41. The drive wheel for the cutter 41 is mounted on the base 10. One end of the cutter bar 42 is hinged to the base 10, and the other end spans the feeding channel 14 and is connected to the drive wheel for the cutter 41. The cutter 41 is fixed on the cutter bar 42. The base 10 has an inlet 15 opposite to the cutter 41. The inlet 15 extends laterally and penetrates the inner wall of the feeding channel 14, enabling the cutter 41 to accurately cut the consumables in the feeding channel 14 along the direction of the inlet 15. Specifically, when consumables in a certain feeding channel 13 become stuck or the tray becomes abnormal, the cutter 41 can quickly cut off the consumables in that feeding channel 14, avoiding blockage that could affect the normal operation of subsequent merging feeding channels 14. After cutting, the feeding drive wheel 22 in the feeding module 20 can work with the cutter bar 42 to pull back the blocked consumables, release the channel space, prevent the jammed material from extending into the feeding hole 311 in the buffer slider 31, and ensure the smooth flow of the entire feeding system.

[0079] The system primarily monitors the current changes of the feeding drive motor 23 of the feeding drive wheel 22, especially when the motor stalls and the current abnormally increases. The system can intelligently determine the jammed state of the consumables, promptly activating the cutter module 40 to cut them, while the feeding module 20 performs a retraction operation and automatically switches to another feeding channel 13 to continue feeding, thus ensuring continuous and reliable feeding. The inlet 15 extends laterally and penetrates the inner wall of the feeding channel 14. Its design provides sufficient space for the cutter 41 to fully penetrate the channel, achieving a one-time cut of the consumables. This ensures a clean, efficient, and precise cutting action, avoiding problems such as consumable residue or incomplete cutting, and helps improve the reliability and ease of operation of the feeding system.

[0080] like Figure 11-14 As shown, in an optional embodiment of this utility model, the drive wheel of the cutter 41 includes a drive cam 431 and a drive shaft 432 eccentrically mounted on the drive cam 431. The cutter bar 42 has an elongated hole 421, and the drive shaft 432 passes through the elongated hole 421. The rotation of the drive cam 431 causes the drive shaft 432 to slide in the elongated hole 421, so that the cutter bar 42 swings.

[0081] Specifically, by configuring the drive wheel of the cutter 41 as a combination of a drive cam 431 and a drive shaft 432 eccentrically positioned on the end face of the drive cam 431, the drive cam 431 has a specific curved profile, and the drive shaft 432 is eccentrically positioned on its end face. When the drive cam 431 rotates, the drive shaft 432 slides up and down in the elongated hole 421 of the cutter bar 42, thereby driving the cutter bar 42 to swing. This structure cleverly utilizes the trajectory characteristics of the eccentric wheel, so that during the rotation of the drive cam 431, the drive shaft 432 not only rotates with the cam, but also lifts and falls during its stroke, thereby driving the cutter bar 42, which is hinged to the base 10, to swing around the axis. Based on the lever principle, when the drive cam 431 rotates one and a half revolutions, the drive shaft 432 drives the cutter bar 42 downwards, giving the cutter bar 42 a large torque. The cutter 41 mounted on the cutter bar 42, in conjunction with the inlet 15 on the base 10, can easily cut away the consumables in the feeding channel 14, thus completing the cutting action. When the drive cam 431 continues to rotate to the other half-cycle, the drive shaft 432 lifts the cutter bar 42, causing the cutter 41 to be pulled out of the inlet 15 and return to its original position. By coordinating the eccentric rotation trajectory of the drive shaft 432 on the drive cam 431 with the structure of the cutter bar 42, a cutting and resetting action can be completed within one revolution of the drive cam 431 without the need for an additional return spring or complex mechanism. This improves the structural compactness and transmission efficiency, reduces the failure rate and maintenance costs, and has significant engineering application value.

[0082] The cutter module 40 features a compact structure and coordinated functions. Its components work together to achieve efficient and stable cutting operations, making it particularly suitable for rapid removal of consumables when jamming or other abnormalities occur during feeding. Besides the core cutter 41 drive wheel mechanism, the cutter module 40 also includes a cutter 41 drive motor, a cutter fixing nut 45, a cutter bar shaft 46, a cutter detection sensor, and a detection baffle 433. The cutter 41 drive motor is mounted on the base 10, providing driving force to continuously and stably rotate the drive cam 431, thereby driving the cutter bar 42 to complete the cutter 41 action. The cutter 41 is mounted on the cutter bar 42 and is securely installed on the cutter bar 42 by the cutter fixing nut 45, ensuring that the cutter 41 will not loosen or shift during cutting, thus improving cutting accuracy and safety. Furthermore, the cutter bar 42 is hinged to the base 10 via the cutter bar shaft 46, allowing it to swing around the cutter bar shaft 46 under the drive of the drive shaft 432, realizing the up-and-down switching action of the cutter 41. To ensure precise control and status feedback of the cutter 41's movement, a cutter detection sensor 47 is installed, fixed at an appropriate position on the housing of the cutter 41 drive motor. A compact and responsive slotted photoelectric switch is preferred for non-contact stroke monitoring. A corresponding detection baffle 433 is mounted on the outer ring surface of the drive cam 431. When the drive cam 431 rotates to a specific position, the detection baffle 433 will block or move away from the photoelectric switch's sensing area, thus accurately feeding back to the control system whether the cutter bar 42 has completed its downward or return motion.

[0083] Through the above structural design, the cutter module 40 can not only achieve stable and reliable cutting under normal conditions, but also respond quickly to abnormal situations such as material jamming in the feeding channel 14, performing material interruption processing to ensure the continuous operation and safety protection of the entire equipment system. At the same time, the modular design facilitates maintenance and replacement, effectively improving the reliability and service life of the entire machine.

[0084] On the other hand, this utility model also provides a 3D printer (not shown in the figure), which integrates the aforementioned feeding device. By organically combining the feeding module 20, buffer mechanism, and cutter module 40, it achieves precise feeding, dynamic control, and anomaly identification and handling functions for consumables. As an important component of the printer, this feeding device not only ensures a continuous and stable supply of consumables but also intelligently responds according to actual consumption during the printing process, effectively improving the feeding accuracy, operating efficiency, and system reliability of the 3D printer. It is particularly suitable for high-requirement, high-continuity printing tasks.

[0085] In addition, the feeding device is equipped with a control module for centralized management and coordinated control of the entire feeding system. This control module is electrically connected to the feeding drive motor 23, insertion detection sensor 24, and consumable presence sensor 25 in the feeding module 20; the cutter 41 drive motor and cutter detection sensor 47 in the cutter module 40; and the first position sensor 331 and second position sensor 332 in the buffer module 30. By collecting data from each sensor and precisely controlling the actions of each actuator, coordinated linkage between modules is achieved. This control module can dynamically determine whether feeding, cutting, or adjusting the position of the buffer slider 31 is needed based on the printer's consumable consumption status, ensuring that consumables are supplied on demand, respond precisely, and operate stably and efficiently.

[0086] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model by those skilled in the art should be included within the scope of protection of this utility model.

Claims

1. A continuous filament supply device for a 3D printer, characterized in that, The device includes a base, a buffer module, and a feeding module. The base has a sliding cavity. The buffer module includes a buffer slider, an elastic element, and a trigger controller. The buffer slider is slidably disposed within the sliding cavity. The buffer slider has a feeding hole along its sliding direction, and the feeding hole has an inlet. The feeding module is disposed on the base and has an outlet, which is detachably connected to the inlet. The elastic element is disposed within the sliding cavity and is used to reset the buffer slider, connecting the inlet and outlet. The trigger controller is disposed on the inner wall of the sliding cavity and is electrically connected to the feeding module. The trigger controller is used to detect the position of the buffer slider.

2. The 3D printer consumable continuous supply device according to claim 1, characterized in that, The sliding cavity has grooves on its inner walls on both sides, and the buffer slider has multiple symmetrically arranged openings on its outer walls on both sides. Each opening is provided with a ball protruding from the outer wall of the buffer slider. When the buffer slider is installed in the sliding cavity, the multiple balls roll and are engaged in the two grooves.

3. The 3D printer consumable continuous supply device according to claim 1, characterized in that, The buffer module further includes a trigger baffle, which is disposed on the outer wall of the buffer slider and corresponds to the trigger controller. The trigger controller is used to detect the movement position of the trigger baffle.

4. The 3D printer consumable continuous supply device according to claim 3, characterized in that, The trigger controller includes a first position sensor and a second position sensor. The first position sensor and the second position sensor are spaced apart on the inner wall of the sliding cavity and are both located on the moving path of the trigger baffle. When the trigger baffle moves with the buffer slider, the trigger baffle can block the triggering of the first position sensor and / or the second position sensor.

5. The 3D printer consumable continuous supply device according to claim 1, characterized in that, The number of feeding modules is two. The base is provided with a feeding channel and two feeding channels. One end of the feeding channel is connected to the two feeding channels, and the other end is connected to the feeding hole. The two feeding modules are respectively located on the two feeding channels. Each of the feeding modules includes a tray and a feeding drive wheel. The tray is rotatably mounted on the top of the base and connected to the corresponding feeding channel. The feeding drive wheel is rotatably mounted above the feeding channel to push the consumables on the tray into the feeding channel through the feeding channel, so that the consumables enter the feeding hole.

6. The 3D printer consumable continuous supply device according to claim 5, characterized in that, The two feeding channels and the feeding channel form a Y-shaped structure, and the included angle between the two feeding channels is in the range of 20°-60°.

7. The 3D printer consumable continuous supply device according to claim 5, characterized in that, The outer ring surface of the feeding drive wheel is provided with an annular groove that is opposite to the feeding channel. An extrusion hole is formed between the annular groove and the feeding channel. When the consumable enters the extrusion hole, the feeding drive wheel will drive the consumable to move along the feeding channel.

8. The 3D printer consumable continuous supply device according to claim 5, characterized in that, It also includes a cutting module, which includes a cutting blade, a blade holder, and a cutting blade drive wheel. The cutting blade drive wheel is rotatably mounted on the base. One end of the blade holder is hinged to the base, and the other end spans the feeding channel and is rotatably connected to the cutting blade drive wheel. The cutting blade is mounted on the blade holder. The base has an inlet that is opposite to the cutting blade, and the inlet extends laterally and penetrates the inner wall of the feeding channel so that the cutting blade cuts the consumables in the feeding channel along the direction of the inlet.

9. The 3D printer consumable continuous supply device according to claim 8, characterized in that, The cutter drive wheel includes a drive cam and a drive shaft eccentrically mounted on the drive cam. The cutter bar has an elongated hole, and the drive shaft passes through the elongated hole. The drive cam drives the drive shaft to slide in the elongated hole, thereby causing the cutter bar to swing.

10. A 3D printer, characterized in that: Includes the supply device as described in any one of claims 1-9.

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