Printing material rack and 3D printer

Abstract

The utility model discloses a printing material frame and a 3D printer, and relates to the technical field of 3D printing, the printing material frame is used for feeding and discharging materials to a printing module, the printing material frame comprises a main body frame, a detection module and a buffer sliding frame, the main body frame is provided with a first channel, and line materials in the first channel are suitable for being driven by a feeding and discharging device; the detection module is connected to the main body frame, and the detection module is provided with a full-load detection piece and a no-load detection piece; the buffer sliding frame is provided with a first channel, the buffer sliding frame is provided with a second channel, one end of the buffer sliding frame is movably connected to one end of the main body frame so that the second channel can be communicated with the first channel to form a material passing channel, and the buffer sliding frame is provided with a trigger part used for triggering the full-load detection piece and the no-load detection piece. The technical scheme provided by the utility model aims to avoid feeding failure or material planing caused by the fact that the feeding speed of the printing material frame is higher than the feeding speed of the printing module.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a printing material holder and a 3D printer. Background Technology

[0002] A 3D printer, also known as a three-dimensional printer or stereo printer, is a rapid prototyping device that typically uses digital technology to print materials. 3D printers are commonly used in mold making, industrial design, and other fields to create models or parts.

[0003] During 3D printing, the filament on the trolley is moved within the printing frame by a feeding / retracting device to feed into the printing module. The filament, in the form of fine threads, is supplied to the printing module. Once heated to a molten state within the printing module, the module extrudes the filament layer by layer according to a path generated by the printer's controller, thus printing a three-dimensional object. The printing module includes an extrusion assembly and a nozzle. The extrusion assembly feeds or retracts filament into the nozzle. During the filament feeding process, the filament passes through the printing frame and the extrusion assembly before being fed into the nozzle.

[0004] However, when the conveying speed of the feeding and unloading module deviates from that of the extrusion component, and the extrusion component conveys at a slower speed while the feeding and unloading device conveys at a faster speed, the wire in the printing rack may become full and clogged, causing the printing module to fail to feed or to have material clipping problems. Utility Model Content

[0005] The main purpose of this invention is to propose a printing rack and a 3D printer, which aims to avoid feeding failure or material stripping caused by the feeding speed of the printing rack being faster than the feeding speed of the printing module.

[0006] To achieve the above objectives, this utility model proposes a printing material rack for feeding and unloading materials into and out of the printing module, the printing material rack comprising:

[0007] The main frame is provided with a first channel, and the wire material in the first channel is suitable for being driven by a feeding and unloading device.

[0008] A detection module, connected to the main frame, is equipped with a full-load detection component and an empty-load detection component; and

[0009] A buffer sliding frame is provided with a second channel. The buffer sliding frame is movably connected to one end of the main frame, so that the second channel communicates with the first channel to form a material passage. The buffer sliding frame is provided with a triggering part for triggering the full load detection element and the empty load detection element.

[0010] In one embodiment, the printing material rack further includes a transfer tube, and the detection module is further provided with an empty load detection element. The transfer tube is located at the end of the buffer sliding frame away from the main frame and is connected to the printing module. The transfer tube is used for wire material transfer between the material feeding channel and the printing module. The triggering part can also be used to trigger the empty load detection element.

[0011] In one embodiment, the printing material holder further includes a spring piece connected to the main frame and forming a limiting space with the main frame, wherein at least a portion of the buffer sliding frame is movably limited within the limiting space.

[0012] In one embodiment, the triggering part is movably limited to the limiting space, the spring is disposed between the detection module and the main frame, the spring has a first protrusion corresponding to the full load detection element, the spring has a second protrusion corresponding to the empty load detection element, and the triggering part is configured to press against the spring, such that the first protrusion triggers the full load detection element or the second protrusion triggers the empty load detection element.

[0013] In one embodiment, the spring sheet includes at least a first bending protrusion and a second bending protrusion, both of which protrude toward the main frame. The first bending protrusion has a first extension on the side facing away from the limiting space, and the second bending protrusion has a second extension on the side facing away from the limiting space.

[0014] In one embodiment, the spring sheet further includes a mounting plate, the first bent protrusion and the second bent protrusion are respectively connected to both sides of the mounting plate, the mounting plate is provided with a through hole, the main frame is provided with a mounting hole, and the mounting plate and the main frame are connected by screws through the through hole and the mounting hole.

[0015] In one embodiment, the buffer sliding frame is provided with a clearance channel, the extension direction of which is consistent with the extension direction of the main frame, and the clearance channel is used to avoid the connection structure between the mounting plate and the main frame.

[0016] In one embodiment, the buffer sliding frame includes a sleeve portion and an extension portion connected to each other. The extension portion is provided with a second channel, and the sleeve portion is provided with a limiting cavity communicating with the second channel. The main body frame is provided with an extension tube and a limiting step. The limiting step is limited in the limiting cavity, and the extension tube extends at least partially into the second channel.

[0017] In one embodiment, the printing material rack further includes a feeding and unloading device, which is equipped with an extrusion wheel that extends at least partially into the first channel to drive the wire material to move within the material passage. The feeding and unloading device is electrically connected to the detection module.

[0018] This utility model also proposes a 3D printer, the 3D printer comprising:

[0019] A printing module, wherein the printing module is provided with an extrusion channel; and

[0020] As described above, the printing material rack is used for feeding and unfeeding material into the extrusion channel, and the detection module is electrically connected to the printing module.

[0021] The technical solution of this utility model is that the buffer sliding frame is movably connected to one end of the main frame, so that the second channel of the buffer sliding frame is connected to the first channel, forming a material passage. The feeding and unloading device drives the wire material in the first channel to move, thereby moving the wire material in the material passage. During feeding, if the speed at which the feeding and unloading device drives the wire material is greater than the speed at which the extrusion component in the printing module drives the wire material, the feeding and unloading device will feed an extra section of wire material into the second channel. This causes the wire material to push the buffer sliding frame, which moves and triggers the full-load detection component. The detection module receives the full-load signal and can warn the user to pause the operation of the feeding and unloading device and wait for the extrusion component to finish feeding the extra wire material. This avoids problems such as wire material feeding failure or material stripping caused by the feeding and unloading device's conveying speed being greater than the extrusion component's conveying speed. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the printing material holder in one embodiment of this utility model;

[0024] Figure 2 A schematic diagram of the printing material holder from another perspective in one embodiment of this utility model;

[0025] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure along the AA direction;

[0026] Figure 4 An exploded view of the printing material holder in one embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the main frame in one embodiment of this utility model;

[0028] Figure 6 A schematic diagram of the spring sheet in one embodiment of this utility model;

[0029] Figure 7 A schematic diagram of the structure of the buffer sliding frame in one embodiment of this utility model;

[0030] Figure 8 This is a schematic diagram of the detection module in one embodiment of the present invention.

[0031] Explanation of icon numbers:

[0032] 100. Printing material rack; 1. Main frame; 11. First channel; 12. Mounting column; 13. Mounting hole; 14. Positioning pin; 15. Extension tube; 16. Limiting step; 2. Detection module; 21. Full load detection piece; 22. Empty load detection piece; 3. Buffer sliding frame; 31. Extension part; 311. Second channel; 32. Sleeving part; 321. Limiting cavity; 33. Trigger part; 34. Avoidance channel; 4. Transmission tube; 5. Spring piece; 51. First extension part; 52. Second extension part; 53. First bending protrusion; 54. Second bending protrusion; 55. Mounting plate; 551. Through hole; 552. Positioning hole; 6. Limiting space; 7. Extrusion wheel; 8. Material passage.

[0033] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the 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.

[0035] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0037] Please refer to the reference. Figures 1 to 8 As shown, this utility model proposes a printing material rack 100 for feeding and unloading material into and out of the printing module. The printing material rack 100 includes a main frame 1, a detection module 2, and a buffer sliding frame 3. The main frame 1 is provided with a first channel 11, and the wire material in the first channel 11 is suitable for being driven by the feeding and unloading device. The detection module 2 is connected to the main frame 1 and is provided with a full-load detection element 21 and an empty-load detection element 22. The buffer sliding frame 3 is provided with a second channel 311 and is movably connected to one end of the main frame 1, so that the second channel 311 communicates with the first channel 11 to form a material passage channel 8. The buffer sliding frame 3 is provided with a trigger part 33 for triggering the full-load detection element 21 and the empty-load detection element 22.

[0038] Understandably, a 3D printer typically includes a filament tray, a feed rack, and a printing module. The filament tray holds filament that can be fed into the printing module via the feed rack or returned to the tray. The printing module includes an extrusion assembly and a nozzle. The extrusion assembly feeds or ejects filament into the nozzle. The feed rack usually has a feeding / retracting device, which functions similarly to the extrusion assembly, both driving the filament movement. During filament feeding, the filament passes through the feeding / retracting device and the extrusion assembly before being fed into the nozzle. During filament ejection, the printing module cuts the filament, and the extrusion assembly and feeding / retracting module return the filament to the filament tray.

[0039] In this embodiment, the buffer sliding frame 3 is movably connected to one end of the main frame 1, so that the second channel 311 of the buffer sliding frame 3 communicates with the first channel 11 to form a material passage 8. The end of the main frame 1 away from the buffer sliding frame 3 has a feed inlet, and the end of the buffer sliding frame 3 away from the main frame 1 has a discharge outlet. The feeding / unloading device drives the wire material in the first channel 11 to move, thereby moving the wire material within the material passage 8. During feeding, the wire material on the tray enters the material passage 8 through the feed inlet and then leaves the material passage 8 through the discharge outlet, moving towards the printing module. During feeding, if the speed at which the feeding / unloading device drives the wire material is greater than the speed at which the extrusion assembly drives the wire material, the feeding / unloading device will feed an additional section of wire material into the second channel 311, causing the wire material to push the buffer sliding frame 3. The buffer sliding frame 3 moves relative to the main frame 1, and drives the trigger part 33 to trigger the full-load detection element 21. When the full load detection component 21 is triggered, the detection module 2 receives the full load signal, which can warn the user to stop the operation of the feeding and unloading device and wait for the extrusion component to finish feeding the excess wire. This can avoid problems such as wire feeding failure or material stripping caused by the feeding and unloading device conveying speed being greater than the extrusion component conveying speed.

[0040] The triggering part 33 is used to trigger the full load detection element 21. When the triggering part 33 approaches or contacts the full load detection element 21, the full load detection element 21 is in the triggered state; when the triggering part 33 moves away from the full load detection element 21, the full load detection element 21 is in the untriggered state.

[0041] Specifically, the full load detection element 21 can be configured as a non-contact sensor such as a photoelectric sensor or an electromagnetic sensor to detect the load. When the triggering part 33 enters the detection range of the full load detection element 21 and is detected by the full load detection element 21, the full load detection element 21 is triggered by the triggering part 33. Correspondingly, when the triggering part 33 leaves the detection range of the full load detection element 21, the full load detection element 21 is in an untriggered state. Alternatively, the full load detection element 21 can be configured as a contact sensor such as a piezoelectric sensor or a mechanical limit sensor to detect the load. When the triggering part 33 contacts or presses against the trigger end of the full load detection element 21, the full load detection element 21 is triggered by the triggering part 33. Correspondingly, when the triggering part 33 leaves the trigger end of the full load detection element 21, the full load detection element 21 is in an untriggered state.

[0042] Understandably, the buffer sliding frame 3 can slide along the extension direction of the main frame 1. When the wire pushes the buffer sliding frame 3 to trigger the full-load detection element 21, the buffer sliding frame 3 moves away from the main frame 1. In actual implementation, the buffer sliding frame 3 can be slidably connected to one end of the main frame 1. The sliding connection can be achieved by: the main frame 1 having a slide rail set along the extension direction of the main frame 1, with the buffer sliding frame 3 slidably mounted on the slide rail; or, the buffer sliding frame 3 being movably sleeved on one end of the main frame 1 and clearance-fitted with it. No specific limitation is made here. The detection module 2 is connected to the main frame 1 so that the position of the detection module 2 is fixed relative to the main frame 1, and will not be displaced from the main frame 1 due to vibration or shaking, thus avoiding affecting the accurate triggering of the full-load detection element 21 by the buffer sliding frame 3 when fully loaded.

[0043] In one embodiment of this utility model, such as Figures 1 to 4 and Figure 6 As shown, the printing material rack 100 also includes a transmission pipe 4, and the detection module 2 is also provided with an empty detection element 22. The transmission pipe 4 is located at the end of the buffer sliding frame 3 away from the main frame 1 and is connected to the printing module. The transmission pipe 4 is used for the transmission of wire material between the material passage 8 and the printing module. The triggering part 33 can also be used to trigger the empty detection element 22.

[0044] In this embodiment, the feed channel 8 is connected to the printing module via the transfer pipe 4. The wire is transferred from the feed channel 8 to the printing module via the transfer pipe 4. The transfer pipe 4 prevents the wire from leaking directly between the printing tray 100 and the printing module, thus protecting the wire. Understandably, when the wire is fed into the printing module, it moves from the printing tray 100 to the printing module within the transfer pipe 4. The wire rubs against the transfer pipe 4, causing it to compress. If the printing module prints without a load due to wire tangling or other issues, the wire will not move within the transfer pipe 4, causing it to spring back and push the buffer sliding frame 3 relative to the main frame 1. The trigger part 33 of the buffer sliding frame 3 triggers the no-load detection element 22. After the no-load detection element 22 is triggered, the detection module 2 receives a no-load signal and warns the user to stop the printing module. The user can then promptly troubleshoot the problem and prevent the printing module from continuing to print without a load.

[0045] Furthermore, during feeding, if the speed at which the feeding and unloading device drives the wire material is greater than the speed at which the extrusion assembly drives the wire material, the feeding and unloading device will feed an additional section of wire material into the second channel 311. The wire material gathers at the transmission pipe 4 and pushes the transmission pipe 4 to move the buffer sliding frame 3, so that the triggering part 33 triggers the full load detection element 21.

[0046] Understandably, when the transmission pipe 4 pushes the buffer sliding frame 3 to trigger the no-load detection element 22, the buffer sliding frame 3 moves towards the main frame 1. Therefore, the full-load detection element 21 and the no-load detection element 22 of the detection module 2 are respectively located near the discharge port and the feed port. When the printing material rack 100 and the printing module are feeding normally, the triggering part 33 of the buffer sliding frame 3 is located between the full-load detection element 21 and the no-load detection element 22. The specific positions of the full-load detection element 21 and the no-load detection element 22 can be set according to the position of the triggering part 33 of the buffer sliding frame 3 when it is full-loaded and no-loaded.

[0047] The triggering part 33 is also used to trigger the no-load detection element 22. When the triggering part 33 approaches or contacts the no-load detection element 22, the no-load detection element 22 is in a triggered state; when the triggering part 33 moves away from the no-load detection element 22, the no-load detection element 22 is in a non-triggered state.

[0048] Specifically, the no-load detection element 22 can be configured as a non-contact sensor such as a photoelectric sensor or an electromagnetic sensor to detect the position. When the triggering part 33 enters the detection range of the no-load detection element 22 and is detected by the no-load detection element 22, the no-load detection element 22 is triggered by the triggering part 33. Correspondingly, when the triggering part 33 leaves the detection range of the no-load detection element 22, the no-load detection element 22 is in an untriggered state. Alternatively, the no-load detection element 22 can be configured as a contact sensor such as a piezoelectric sensor or a mechanical limit sensor to detect the position. When the triggering part 33 contacts or presses against the trigger end of the no-load detection element 22, the no-load detection element 22 is triggered by the triggering part 33. Correspondingly, when the triggering part 33 leaves the trigger end of the no-load detection element 22, the no-load detection element 22 is in an untriggered state.

[0049] In one embodiment of this utility model, the full load detection element 21 and the empty load detection element 22 are configured as through-beam photoelectric switches. The through-beam photoelectric switch includes a transmitter and a receiver. When the triggering part 33 extends between the transmitter and the receiver, the through-beam photoelectric switch is triggered.

[0050] Optionally, the transmission tube 4 can be a Teflon tube or a silicone rubber tube, etc.

[0051] Optionally, the buffer sliding frame 3 can be provided with two sets of triggering parts 33, which are respectively set to the full load detection element 21 and the empty load detection element 22. In this way, when the moving stroke of the buffer sliding frame 3 is short when it is fully loaded and empty, the full load detection element 21 and the empty load detection element 22 can be set far apart to avoid the full load detection element 21 or the empty load detection element 22 being accidentally triggered.

[0052] Optionally, the full-load detection component 21 and the empty-load detection component 22 can be integrated on the same detection circuit board. The detection circuit board is connected to the main frame 1 by a bracket or screw, and the connection structure between the detection circuit board and the main frame 1 is set at the end of the detection circuit board away from the buffer sliding frame 3, so as to avoid obstructing the sliding of the buffer sliding frame 3.

[0053] In one embodiment of this utility model, such as Figures 1 to 4 As shown, the printing material holder 100 also includes a spring piece 5, which is connected to the main frame 1 and forms a limiting space 6 with the main frame 1. At least part of the buffer sliding frame 3 is movably limited in the limiting space 6.

[0054] In this embodiment, the buffer sliding frame 3 is confined within the limiting space 6 to restrict its movable stroke relative to the main frame 1, thus preventing it from detaching from the main frame 1. It is understood that the movable stroke of the buffer sliding frame 3 should correspond to the distance between the full-load detection element 21 and the empty-load detection element 22, and the movement stroke of the buffer sliding frame 3 driving the trigger part 33 should at least cover both the full-load detection element 21 and the empty-load detection element 22. Optionally, the buffer sliding frame 3, confined within the limiting space 6, abuts against the inner wall of the limiting space 6 at both the beginning and end of its stroke.

[0055] Understandably, the spring sheet 5 may include multiple spring sheets and be arranged around the circumference of the buffer sliding frame 3 to enclose and form multiple spaced limiting spaces 6. Alternatively, the spring sheet 5 and the main frame 1 may enclose and form a limiting space 6 around the circumference of the buffer sliding frame 3, thereby improving the uniformity of force when the buffer sliding frame 3 abuts against the inner wall of the limiting space 6 and preventing the buffer sliding frame 3 from becoming skewed and unable to slide normally relative to the main frame 1.

[0056] In one embodiment of this utility model, such as Figure 2 , Figure 4 and Figure 8 As shown, the trigger part 33 is movably limited to the limiting space 6, the spring piece 5 is disposed between the detection module 2 and the main frame 1, the spring piece 5 has a first protrusion 51 corresponding to the full load detection component 21, the spring piece 5 has a second protrusion 52 corresponding to the empty load detection component 22, and the trigger part 33 is configured to press against the spring piece 5, so that the first protrusion 51 triggers the full load detection component 21 or the second protrusion 52 triggers the empty load detection component 22.

[0057] In this embodiment, the triggering part 33 does not directly trigger the full load detection element 21 and the empty load detection element 22. Instead, it triggers the full load detection element 21 and the empty load detection element 22 by pressing against the spring piece 5, causing the first protrusion 51 and the second protrusion 52 to do so. Thus, the spring piece 5 not only serves as a limiting buffer sliding frame 3, but also has the function of triggering the full load detection element 21 and the empty load detection element 22.

[0058] Understandably, the position of the trigger part 33 of the buffer sliding frame 3 relative to the main frame 1 when it is unloaded and fully loaded can be set as the start and end points of the movable stroke of the trigger part 33. When the trigger part 33 is at the start and end points of the movable stroke, it will abut against the spring piece 5 for limiting. At this time, the unloaded detection piece 22 and the fully loaded detection piece 21 can be triggered.

[0059] Furthermore, the limiting space 6 is located on the side of the spring piece 5 facing away from the detection module 2. Thus, the spring piece 5 also provides some protection for the detection module 2, preventing the buffer sliding frame 3 from scraping against the detection module 2 when moving relative to the main frame 1, or preventing other parts of the buffer sliding frame 3 (excluding the triggering part 33) from accidentally triggering the full-load detection element 21 and the empty-load detection element 22. Simultaneously, the first protrusion 51 and the second protrusion 52 can be positioned close to the full-load detection element 21 and the empty-load detection element 22 to improve the sensitivity of triggering the full-load detection element 21 and the empty-load detection element 22.

[0060] Optionally, the spring 5 can be a spring sheet. When the trigger part 33 presses against the spring sheet 5, it undergoes elastic deformation, which facilitates the movement of the first protrusion 51 or the second protrusion 52 toward the full load detection element 21 or the empty load detection element 22, so as to trigger the full load detection element 21 or the empty load detection element 22.

[0061] Optionally, the trigger part 33 protrudes into the detection module 2. In order to reduce the weight of the trigger part 33 and balance the center of gravity of the buffer slide 3 so that the buffer slide 3 can slide more smoothly, the trigger part 33 is provided with holes.

[0062] In one embodiment of this utility model, such as Figure 2 and Figure 8 As shown, the spring piece 5 includes at least a first bending protrusion 53 and a second bending protrusion 54. Both the first bending protrusion 53 and the second bending protrusion 54 protrude toward the main frame 1. The first bending protrusion 53 has a first extension 51 on the side facing away from the limiting space 6, and the second bending protrusion 54 has a second extension 52 on the side facing away from the limiting space 6.

[0063] In this embodiment, the triggering part 33 presses against the first bending protrusion 53 and the second bending protrusion 54 to trigger the full load detection element 21 and the empty load detection element 22 by the first protrusion 51 and the second protrusion 52. The first bending protrusion 53 and the second bending protrusion 54 are provided to protrude towards the main frame 1 so that the triggering part 33 can press against the first bending protrusion 53 and the second bending protrusion 54.

[0064] In actual implementation, the first bending protrusion 53, the second bending protrusion 54, the first extension 51 and the second extension 52 can be formed by bending the spring sheet.

[0065] In one embodiment of the present invention, the spring piece 5 further includes a mounting plate 55, a first bending protrusion 53 and a second bending protrusion 54 are respectively connected to both sides of the mounting plate 55, the mounting plate 55 is provided with a through hole 551, the main frame 1 is provided with a mounting hole 13, and the mounting plate 55 and the main frame 1 are connected by screws through the through hole 551 and the mounting hole 13.

[0066] In this embodiment, the mounting plate 55 is screwed to the main frame 1 so that the spring piece 5 is spaced apart from the main frame 1. The first bending protrusion 53 and the second bending protrusion 54 are connected to both sides of the mounting plate 55 and are suspended so that they can be deformed by the trigger part 33.

[0067] Optionally, such as Figure 5 and Figure 8 As shown, the mounting hole 13 can be a threaded hole. The main frame 1 can be provided with a mounting post 12, and the mounting hole 13 is provided on the mounting post 12. The end face of the mounting post 12 abuts against the mounting plate 55. Then, the screw shank passes through the through hole 551 of the mounting plate 55 and connects to the mounting hole 13 to limit the mounting plate 55 between the mounting post 12 and the screw nut. Optionally, the main frame 1 can also be provided with a positioning pin 14. The mounting plate 55 is provided with a positioning hole 552 corresponding to the positioning pin 14. When installing the spring piece 5, the positioning pin 14 passes through the positioning hole 552 to facilitate the positioning and installation of the spring piece 5.

[0068] Optionally, the mounting plate 55 is arranged parallel to the sliding direction of the buffer sliding frame 3 to avoid contact with the buffer sliding frame 3 and increase the resistance when the buffer sliding frame 3 slides. The connection part between the first bent protrusion 53 and the mounting plate 55 and the connection part between the second bent protrusion 54 and the mounting plate 55 are both inclined towards the main frame 1 by the mounting plate 55 to guide the trigger part 33.

[0069] Optionally, the connection structure between the control module 2 and the main frame 1 is similar to the connection structure between the mounting plate 55 and the main frame 1. Positioning is achieved through positioning pins and positioning holes, and screw connection is achieved through the cooperation of mounting columns and mounting holes, so that the control module 2 and the main frame 1 are spaced apart to avoid obstructing the sliding of the buffer sliding frame 3.

[0070] In one embodiment of this utility model, such as Figure 7 As shown, the buffer sliding frame 3 is provided with a clearance channel 34. The extension direction of the clearance channel 34 is consistent with the extension direction of the main frame 1. The clearance channel 34 is used to avoid the connection structure between the mounting plate 55 and the main frame 1.

[0071] In this embodiment, when the buffer sliding frame 3 is movably connected to the main frame 1, the connection structure between the mounting plate 55 and the main frame 1, such as the mounting post 12 and the positioning pin 14, passes through the clearance channel 34 to prevent the connection structure between the mounting plate 55 and the main frame 1 from obstructing the normal sliding of the buffer sliding frame 3. Simultaneously, the extending direction of the clearance channel 34 is consistent with the moving direction of the buffer sliding frame 3, and the connection structure between the mounting plate 55 and the main frame 1 can also abut against and limit the movement of the inner wall of the clearance channel 34. Thus, the connection structure and the clearance channel 34 work together to guide the sliding of the buffer sliding frame 3.

[0072] In one embodiment of this utility model, such as Figure 3 and Figure 7 As shown, the buffer sliding frame 3 includes a sleeve portion 32 and an extension portion 31 connected to each other. The extension portion 31 is provided with a second channel 311. The sleeve portion 32 is provided with a limiting cavity 321 communicating with the second channel 311. The main frame 1 is provided with an extension tube 15 and a limiting step 16. The limiting step 16 is limited in the limiting cavity 321. The extension tube 15 extends at least partially into the second channel 311.

[0073] In this embodiment, the buffer sliding frame 3 is disposed above the main frame 1 and naturally fits onto the main frame 1 under the action of gravity. At the same time, the limiting step 16 of the main frame 1 limits the movement of the buffer sliding frame 3 relative to the main frame 1. The bottom wall of the limiting cavity 321 is adapted to abut against the limiting step 16 to limit the lowest position of the buffer sliding frame 3 relative to the main frame 1. The protruding tube 15 forms a partial first channel 11. The protruding tube 15 extends into the second channel 311 through the limiting cavity 321, so that the first channel 11 and the second channel 311 are connected to form a material passage channel 8.

[0074] In actual implementation, a transmission tube 4 can be installed at the end of the protrusion 31 away from the sleeve 32, and the protrusion tube 15 can be a Teflon tube. The trigger part 33 is located at the end of the sleeve 32 away from the protrusion 31, so as to cooperate with the detection module 2 and the spring 5 connected to the main frame 1.

[0075] Optionally, the limiting step 16 is arranged around the protruding tube 15. The cross-sectional shape of the limiting cavity 321 is consistent with the cross-sectional shape of the limiting step 16, and neither is circular, so as to avoid the buffer sliding frame 3 rotating relative to the main frame 1 and affecting the transmission effect of the second channel 311 on the wire material.

[0076] Understandably, when the buffer sliding frame 3 slides relative to the main frame 1, the extension tube 15 also slides relative to the second channel 311, and the limiting step 16 slides relative to the limiting cavity 321.

[0077] In one embodiment of this utility model, such as Figures 1 to 4As shown, the printing material rack 100 also includes a feeding and unloading device. The feeding and unloading device is equipped with an extrusion wheel 7, which extends at least partially into the first channel 11 to drive the wire material to move within the material passage 8. The feeding and unloading device is electrically connected to the detection module 2.

[0078] In this embodiment, the extrusion wheel 7 extends into the first channel 11 to contact the wire material within the first channel 11. The feeding / retracting device drives the extrusion wheel 7 to rotate forward or backward, thereby feeding or retracting the wire material within the wire passage. The feeding / retracting device is electrically connected to the detection module 2. When the full-load detection element 21 on the detection module 2 is triggered, the detection module 2 transmits a pause signal to the feeding / retracting device, causing the feeding / retracting device to pause driving the extrusion wheel 7 until the extrusion assembly in the printing module has finished feeding the excess wire material. At this time, the buffer sliding frame 3 moves back to its original position, and the trigger 33 no longer triggers the full-load detection element 21. The detection module 2 can then transmit a run signal to the feeding / retracting device, which restarts driving the extrusion wheel 7 to feed the wire material within the material passage 8. When the empty-load detection element 22 on the detection module 2 is triggered, the detection module 2 transmits a stop signal to the feeding / retracting device, causing the feeding / retracting device to stop driving the extrusion wheel 7, facilitating user troubleshooting of malfunctions or problems causing the printing module to print dry.

[0079] Optionally, raised stripes parallel to the axial direction of the extrusion wheel 7 are provided on the circumferential surface of the extrusion wheel 7 to improve the tightness of the contact between the extrusion wheel 7 and the wire material and prevent the wire material from slipping when the extrusion wheel 7 drives the wire material to move.

[0080] Understandably, the detection module 2 can transmit full load and no load signals to the control module of the 3D printer, which in turn controls the operation of the feeding and unfeeding device and the extrusion assembly.

[0081] This utility model also proposes a 3D printer, which includes a printing module and a printing material holder 100. The specific structure of the printing material holder 100 is as described in the above embodiments. Since the printing material holder 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The printing module is provided with an extrusion channel, which is connected to the material feeding channel 8 through a transmission pipe; the printing material holder 100 is used for feeding and unloading material into the extrusion channel; and the detection module 2 is electrically connected to the printing module. When the no-load detection element 22 on the detection module 2 is triggered, the detection module 2 transmits a stop signal to the printing module to stop the printing module from running, so that the user can troubleshoot any faults or problems causing the printing module to print without load.

[0082] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A printing material rack for feeding and unloading materials into and out of a printing module, characterized in that, The printing material holder includes: The main frame is provided with a first channel, and the wire material in the first channel is suitable for being driven by a feeding and unloading device. A detection module, connected to the main frame, is equipped with a fully loaded detection component; and The buffer sliding frame is provided with a second channel and is movably connected to one end of the main frame, so that the second channel communicates with the first channel to form a material passage. The buffer sliding frame is provided with a trigger part for triggering the full load detection element.

2. The printing material holder as described in claim 1, characterized in that, The printing material rack also includes a transfer tube, and the detection module is also equipped with an empty load detection component. The transfer tube is located at the end of the buffer sliding frame away from the main frame. The transfer tube is used for wire material transfer between the material feeding channel and the printing module. The triggering part can also be used to trigger the empty load detection component.

3. The printing material holder as described in claim 2, characterized in that, The printing material holder also includes a spring piece, which is connected to the main frame and forms a limiting space with the main frame. At least a portion of the buffer sliding frame is movably limited within the limiting space.

4. The printing material holder as described in claim 3, characterized in that, The triggering part is movable within the limiting space. The spring is disposed between the detection module and the main frame. The spring has a first protrusion corresponding to the full-load detection component and a second protrusion corresponding to the empty-load detection component. The triggering part is configured to press against the spring, so that the first protrusion triggers the full-load detection component or the second protrusion triggers the empty-load detection component.

5. The printing material holder as described in claim 4, characterized in that, The spring sheet includes at least a first bending protrusion and a second bending protrusion. Both the first bending protrusion and the second bending protrusion protrude toward the main frame. The first bending protrusion has a first protrusion on the side facing away from the limiting space, and the second bending protrusion has a second protrusion on the side facing away from the limiting space.

6. The printing material holder as described in claim 5, characterized in that, The spring also includes a mounting plate, the first bending protrusion and the second bending protrusion are respectively connected to both sides of the mounting plate, the mounting plate is provided with a through hole, the main frame is provided with a mounting hole, and the mounting plate and the main frame are connected by screws through the through hole and the mounting hole.

7. The printing material holder as described in claim 6, characterized in that, The buffer sliding frame is provided with a clearance channel, the extension direction of which is consistent with the extension direction of the main frame, and the clearance channel is used to avoid the connection structure between the mounting plate and the main frame.

8. The printing material holder as described in any one of claims 1 to 7, characterized in that, The buffer sliding frame includes a sleeve portion and an extension portion connected to each other. The extension portion is provided with a second channel. The trigger portion is connected to the sleeve portion. The sleeve portion is provided with a limiting cavity communicating with the second channel. The main body frame is provided with an extension tube and a limiting step. The limiting step is limited in the limiting cavity. The extension tube extends at least partially into the second channel.

9. The printing material holder as described in any one of claims 1 to 7, characterized in that, The printing material rack also includes a feeding and unloading device, which is equipped with an extrusion wheel. The extrusion wheel extends at least partially into the first channel to drive the wire material to move within the material passage. The feeding and unloading device is electrically connected to the detection module.

10. A 3D printer, characterized in that, The 3D printer includes: A printing module, wherein the printing module is provided with an extrusion channel; and The printing material holder as described in any one of claims 1 to 9, wherein the printing material holder is used for feeding and unfeeding material into the extrusion channel, and the detection module is electrically connected to the printing module.

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