A material breaking detection device for 3D printer

Abstract

The present invention provides a material break detection device for a 3D printer, which relates to the technical field of 3D printing. The device comprises a fixed tube, which is fixedly installed inside a 3D printer body, and two ends of the fixed tube slide through consumables. A limiting ring is provided at a farther end of one side of the fixed tube, and the limiting ring is slidably sleeved on the surface of the distal end of the consumables. Mounting rings are fixed on the surfaces of the fixed tube and the limiting ring. A plurality of driving components are equidistantly arranged at the center of a circle between two groups of the mounting rings, and the driving components comprise a mounting seat. Compared with the prior art, a plurality of ropes and a plurality of detection components are arranged around the surface of the consumables and are arranged at different positions. When a break occurs at different positions, the different positions can contact with a contact switch of the fixed tube separately and issue a material break prompt. The multi-point detection setting can reduce space occupation on the one hand, and can set a plurality of groups as needed on the other hand, so that the flexibility is high and the detection of the break position of the consumables is more comprehensive.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a material break detection device for a 3D printer. Background Art

[0002] During the printing process, the consumables of FDM 3D printers often run out or break. If the printer cannot identify this situation, the printing will fail and waste a long printing time. The material break detection device is a device commonly used on FDM desktop 3D printers to detect the presence of consumables.

[0003] In the prior art, some devices for detecting 3D printer consumables are installed inside the printer. By passing the consumables through the detection device, when the consumables are used up or broken, the mechanical structure moves and the photoelectric switch and other structures cooperate to quickly respond and issue a reminder of the material shortage. However, in this process, the detection device is not easy to be set too large, which is easy to occupy too much space inside the printer. The detection of the consumable breakage only relies on the detection of one point of the detection device, and the accuracy is poor. When the breakage occurs at other positions, there is no abnormality in the consumables passing through the detection device, and then there will be no material shortage reminder. This defect will also affect the normal use of the 3D printer. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a material break detection device for a 3D printer to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. Multiple groups of ropes and multiple groups of detection components are arranged around the surface of the consumables and are arranged at different positions. When a break occurs at different positions, they can contact the contact switch of the fixed tube separately and issue a material break prompt. The multi-point detection setting, on the one hand, reduces the space occupied, and on the other hand, multiple groups can be set as needed, which has high flexibility and more comprehensive detection of the broken position of the consumables.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical scheme: a material break detection device for a 3D printer, comprising a fixed tube, which is fixedly installed inside a 3D printer body, and the two ends of the fixed tube slide through the consumables, a limit ring is provided at a farther distance on one side of the fixed tube, and the limit ring is slidably sleeved on the distal end surface of the consumables, mounting rings are fixed on the surfaces of the fixed tube and the limit ring, and multiple groups of driving components are equidistantly arranged at the center of the circle between the two groups of the mounting rings, and the driving component comprises a mounting seat, a mounting seat is clamped and installed on the surface of the mounting ring, and a rope wheel is rotatably installed in the mounting seat through a bearing, a rope is sleeved on the rope wheel surface at the corresponding position of the mounting ring of the fixed tube and the limit ring, a detection component is installed on one side of the rope, and the detection component comprises a bottom plate, one side of the bottom plate is fixed to the rope, and the other side of the bottom plate is provided with an arc plate, and the arc plate is in compression contact with the surface of the consumables.

[0006] Furthermore, the driving assembly also includes a connecting shaft, one side of the rope wheel rotates through the mounting seat and is fixed with the connecting shaft, the side of the mounting ring corresponding to the connecting shaft is provided with an insertion shaft, and the insertion shaft and the connecting shaft are connected in a cross-plugging manner.

[0007] Furthermore, a mounting frame is fixed on the surface of the mounting ring corresponding to the plug shaft by screws, and the plug shaft is rotatably mounted on the mounting frame by a bearing, and a torsion spring is installed at the rotational connection between the plug shaft and the mounting frame.

[0008] Furthermore, the detection component also includes a vertical frame, vertical frames are fixed on both sides of the bottom plate, slides are fixed on both sides of the bottom of the arc plate, and the slides are slidably installed inside the vertical frame, a reset spring is fixed on the inner wall of the bottom of the vertical frame, and the other end of the reset spring is fixed to the bottom of the slide.

[0009] Furthermore, the bottom plate is fixed with a lower plate between the two sliding frames, and a slot is opened on the surface of the lower plate, one side of the rope slides through the slot, and an extrusion block is fixed to the bottom of the arc plate, and the extrusion block can be squeezed to cover the top of the slot.

[0010] Furthermore, an extrusion groove is provided at the bottom of the extrusion block, and an anti-slip pattern is provided on the inner wall of the extrusion groove. The upper end surface of the rope passing through the slot is in frictional contact with the extrusion groove.

[0011] Furthermore, guide rings are fixed on the two end surfaces of the bottom plate located at the slot, and the two ends of the rope inside the slot pass through the guide rings on both sides, and the rope passes through the guide rings and the slot in a U shape.

[0012] Furthermore, a fixing block is fixed on the bottom surface of the bottom plate, and the surface on the other side of the rope is fixedly connected to the fixing block.

[0013] Furthermore, a contact column is fixed on one side of the arc plate facing the fixed tube, and the contact column can be pressed and contacted by a contact switch on the surface of the fixed tube.

[0014] Furthermore, a telescopic plate is fixed on the top of the fixed tube, and the extended end of the telescopic plate is fixedly connected to the limiting ring, and the fixed tube and the limiting ring are rigidly connected via the telescopic plate.

[0015] Beneficial effects of the invention: A material breaking detection device for a 3D printer of the invention comprises a fixing tube; a contact switch; consumables; a limiting ring; a mounting ring; a mounting frame; an insert shaft; a torsion spring; a telescopic plate; a detection assembly; a bottom plate; a vertical frame; a slide frame; an arc plate; an extrusion block; an extrusion groove; a lower plate; a slot; a guide ring; a reset spring; a contact column; a fixing block; a driving assembly; a mounting seat; a rope pulley; a rope; a connecting shaft;

[0016] The tops of the fixed tube and the limiting ring of the present invention are fixedly connected by a telescopic plate. First, the distance between the limiting ring and the fixed tube can be adjusted according to the length of the consumables. The distance between the fixed tube and the limiting ring is also the range for detecting material breakage, and it is also the structural framework that keeps the detection component able to move horizontally.

[0017] The present invention facilitates passing one side of the rope through the bottom plate along the path through the setting of the guide ring and the slot, so as to cooperate with the arc plate and remain stationary in a normal state. The lower end fixed block and the rope pull the entire detection assembly toward the side of the fixed tube until it contacts and sends out a material break reminder signal. The size of the detection assembly can be adjusted as needed to allow more detection assemblies to be set on the surface of the consumable. At the same time, the detection assemblies are arranged at intervals along the center of the consumable. In this way, multiple groups of detection assemblies can perform separate detections on different positions of the consumable, and the translation and contact with the fixed tube do not interfere with each other.

[0018] The present invention squeezes the arc plate into contact with the surface of the consumable, and the slides on both sides of the bottom of the arc plate slide along the vertical frame to compress the reset spring. At this time, the extrusion block at the bottom of the arc plate moves downward, and the extrusion groove cooperates with the slot to wrap the position where the rope passes through. Since the inner wall of the extrusion groove is provided with anti-slip grooves, under the extrusion effect and the friction contact between the upper end of the arc plate and the consumable, the upper end of the rope cannot move, and thus the entire rope and the rope wheel cannot be in a circulating rotation state. When the consumable near the contact of the arc plate breaks, the arc plate is no longer in squeeze contact with the consumable, so that the reset spring drives the slide and the arc plate to move upward, and the extrusion block and the extrusion groove are away from the lower plate. At this time, the rope is not restricted by the extrusion groove and can move along the guide ring and the slot.

[0019] The present invention is fixed on a mounting ring through a mounting frame, wherein a plurality of mounting positions are arranged on the mounting ring, and a plurality of detection components and drive components can be installed and used. The driving force of the detection component is provided by a torsion spring. When one side of the rope is no longer restricted, the torsion spring drives the insertion shaft and the connecting shaft to rotate, so that the rope wheel cooperates with the rope to drive the detection component to translate and contact with the fixed tube.

[0020] Compared with the prior art, the present invention arranges multiple groups of ropes and multiple groups of detection components around the surface of the consumables and at different positions. When a break occurs at different positions, they can contact the contact switch of the fixed tube separately and issue a material break prompt. The multi-point detection setting, on the one hand, reduces the space occupied, and on the other hand, multiple groups can be set as needed, which has high flexibility and more comprehensive detection of the consumable break position. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a material break detection device for a 3D printer according to the present invention;

[0022] Figure 2This is a schematic diagram of the structure of a fixed pipe outlet end of a material break detection device for a 3D printer according to the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of a limit ring for a material break detection device for a 3D printer according to the present invention;

[0024] Figure 4 This is one of the structural schematic diagrams of a detection component for a material break detection device for a 3D printer according to the present invention;

[0025] Figure 5 This is a second schematic diagram of the structure of a detection component for a material break detection device for a 3D printer according to the present invention;

[0026] Figure 6 This is a schematic diagram of the connection between a bottom plate and a rope for a material break detection device for a 3D printer of the present invention;

[0027] Figure 7 The present invention is a schematic diagram of the connection between a mounting base and a mounting ring of a material break detection device for a 3D printer.

[0028] In the figure: 1. fixed tube; 11. contact switch; 2. consumables; 3. limit ring; 4. mounting ring; 41. mounting frame; 42. plug shaft; 43. torsion spring; 5. telescopic plate; 6. detection component; 61. bottom plate; 62. vertical frame; 63. slide; 64. arc plate; 65. extrusion block; 66. extrusion groove; 67. lower plate; 68. slot; 69. guide ring; 610. reset spring; 611. contact column; 612. fixed block; 7. drive component; 71. mounting seat; 72. pulley; 73. rope; 74. connecting shaft. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] See also Figures 1 to 7The present invention provides a technical solution: a material break detection device for a 3D printer, comprising a fixed tube 1, wherein the fixed tube 1 is fixedly installed inside a 3D printer body, and both ends of the fixed tube 1 slide through consumables 2, a limiting ring 3 is provided at a farther end of one side of the fixed tube 1, and the limiting ring 3 is slidably sleeved on the distal end surface of the consumable 2, a mounting ring 4 is fixed on the surface of the fixed tube 1 and the limiting ring 3, a plurality of driving components 7 are equidistantly arranged between the two groups of the mounting rings 4, and the driving component 7 comprises a mounting seat 71, a mounting seat 71 is clamped and installed on the surface of the mounting ring 4, and a rope wheel 72 is rotatably installed in the mounting seat 71 through a bearing, a rope 73 is sleeved on the surface of the rope wheel 72 at the corresponding position of the mounting ring 4 of the fixed tube 1 and the limiting ring 3, a detection component 6 is installed on one side of the rope 73, and the detection component 6 comprises a bottom plate 61 One side of the bottom plate 61 is fixed to the rope 73, and the other side of the bottom plate 61 is provided with an arc plate 64, and the arc plate 64 is in compression contact with the surface of the consumable 2. When using the device, the fixed tube 1 is installed inside the 3D printer, and the consumable 2 passes through the two ends of the fixed tube 1. A limit ring 3 is arranged at a farther distance from the consumable 2, and the limit ring 3 is connected to the fixed tube 1. The consumable 2 also passes through the limit ring 3. Through the mounting ring 4 on the fixed tube 1 and the limit ring 3, multiple groups of driving components 7 and detection components 6 can be set according to the length of the consumable 2, and they are set in a staggered manner according to the center position of the circle to detect multiple points of the consumable 2. When a certain position of the consumable 2 is broken, the detection component 6 at this position moves to one side of the fixed tube 1, and a reminder of material breakage is issued through the contact switch 11. Limit rings 3, driving components 7 and detection components 6 can be set on both sides of the fixed tube 1, and only one side is used as a demonstration in the figure.

[0031] In this embodiment, the driving assembly 7 also includes a connecting shaft 74, one side of the rope pulley 72 rotates through the mounting seat 71 to fix the connecting shaft 74, the mounting ring 4 is provided with an insertion shaft 42 on the side corresponding to the connecting shaft 74, and the insertion shaft 42 is connected to the connecting shaft 74 in a cross-plugging manner, the mounting ring 4 is fixed with a mounting frame 41 on the surface corresponding to the insertion shaft 42 by screws, and the insertion shaft 42 is rotatably mounted on the mounting frame 41 through a bearing, and a torsion spring 43 is installed at the rotation connection between the insertion shaft 42 and the mounting frame 41, and the connection method between the connecting shaft 74 and the insertion shaft 42 is conventional The cross-clamping is not shown in the figure. After the plug-in installation, it is fixed on the mounting ring 4 through the mounting frame 41, wherein the mounting ring 4 is provided with a plurality of mounting positions for multiple sets of detection components 6 and drive components 7 to be installed and used. The driving force of the detection component 6 is provided by the torsion spring 43. When one side of the rope 73 is no longer restricted, the torsion spring 43 drives the plug shaft 42 and the connecting shaft 74 to rotate, so that the rope pulley 72 cooperates with the rope 73 (the principle is such as the existing belt and pulley technology) to drive the detection component 6 to translate and contact with the fixed pipe 1. The mounting frame 41 and the plug shaft 42 are partly in Figure 2 and Figure 3 Not shown in FIG.

[0032] In this embodiment, the detection component 6 also includes a vertical frame 62, vertical frames 62 are fixed on both sides of the bottom plate 61, slides 63 are fixed on both sides of the bottom of the arc plate 64, and the slides 63 are slidably installed inside the vertical frame 62, a reset spring 610 is fixed to the inner wall of the bottom of the vertical frame 62, and the other end of the reset spring 610 is fixed to the bottom of the slide 63, the bottom plate 61 is located between the two slide frames and a lower plate 67 is fixed, and a slot 68 is opened on the surface of the lower plate 67, one side of the rope 73 slides through the slot 68, an extrusion block 65 is fixed to the bottom of the arc plate 64, and the extrusion block 65 can be squeezed to cover the top of the slot 68, an extrusion groove 66 is opened at the bottom of the extrusion block 65, and the inner wall of the extrusion groove 66 is provided with anti-slip patterns, The rope 73 passes through the upper end surface of the slot 68 and is in frictional contact with the extrusion groove 66. The bottom plate 61 is fixed with guide rings 69 on the two end surfaces of the slot 68. The two ends of the rope 73 inside the slot 68 pass through the guide rings 69 on both sides, and the rope 73 passes through the guide rings 69 and the slot 68 in a U shape. A fixing block 612 is fixed to the bottom surface of the bottom plate 61, and the surface on the other side of the rope 73 is fixedly connected to the fixing block 612. The bottom plate 61 is fixedly connected to the outer side of the rope 73 through the fixing block 612 at the bottom. The entire detection assembly 6 can move with the rope 73. In the initial state, the consumable 2 passes through the fixed tube 1 and the limit ring 3, and the arc plate 64 is squeezed and contacted with the surface of the consumable 2. The slides 63 on both sides of the bottom of the arc plate 64 move along the vertical The frame 62 slides and compresses the return spring 610. At this time, the extrusion block 65 at the bottom of the arc plate 64 moves downward, and the extrusion groove 66 cooperates with the slot 68 to wrap the position where the rope 73 passes through. Since the inner wall of the extrusion groove 66 is provided with anti-slip grooves, under the extrusion effect, and the friction contact between the upper end of the arc plate 64 and the consumable 2, (the inner surface of the arc plate 64 is also provided with anti-slip grooves to increase the friction between the arc plate 64 and the consumable 2) the upper end of the rope 73 cannot move, and then the entire rope 73 and the rope wheel 72 cannot be in a cyclic rotation state. When the consumable 2 near the arc plate 64 breaks, the arc plate 64 is no longer in compression contact with the consumable, so that the return spring 610 drives the slide 63 and the arc plate 64 to move upward, and the extrusion block 65 and the extrusion groove 66 are away from the lower plate 67. At this time The rope 73 is not restricted by the extrusion groove 66 and can move along the guide ring 69 and the slot 68. Through the setting of the guide ring and the slot 68, it is convenient to pass one side of the rope 73 through the bottom plate 61 along the path, so as to cooperate with the arc plate 64 to maintain stillness in a normal state. The lower end fixed block 612 and the rope 73 pull the entire detection component 6 toward the side of the fixed tube 1 until it contacts and sends out a material break reminder signal. The size of the detection component 6 can be adjusted as needed to meet the requirement that more detection components 6 can be set on the surface of the consumable 2. At the same time, the detection components 6 are arranged at intervals along the center of the consumable 2. In this way, multiple groups of detection components 6 can perform separate detections on different positions of the consumable 2, and at the same time, the translation contact with the fixed tube 1 does not interfere with each other.

[0033] In this embodiment, a contact column 611 is fixed on the side of the arc plate 64 facing the fixed tube 1, and the contact column 611 can squeeze and contact the contact switch 11 on the surface of the fixed tube 1. After the rope 73 is unlocked and is not restricted by the squeezing block 65 and the squeezing groove 66, the rope 73 drives the bottom plate 61 to move toward the side of the fixed tube 1 until the squeezing column contacts the contact switch 11, thereby issuing a material shortage reminder (the technical principle of this part of the contact column 611 and the contact switch 11 can cooperate with the alarm device of the prior art. After the contact column 611 contacts the contact switch 11, the circuit inside the fixed tube 1 is energized, and an electrical signal is sent to the alarm device and the printer body as a material shortage signal reminder).

[0034] In this embodiment, a telescopic plate 5 is fixed on the top of the fixed tube 1, and the extended end of the telescopic plate 5 is fixedly connected to the limit ring 3. The fixed tube 1 and the limit ring 3 are rigidly connected by the telescopic plate 5. The tops of the fixed tube 1 and the limit ring 3 are fixedly connected by the telescopic plate 5. First, the distance between the limit ring 3 and the fixed tube 1 can be adjusted according to the length of the consumable 2. The distance between the fixed tube 1 and the limit ring 3 is also the range for detecting material breakage, and it is also the structural skeleton for maintaining the horizontal movement of the detection component 6.

[0035] When using the device, the fixed tube 1 is installed inside the 3D printer, the consumable 2 passes through both ends of the fixed tube 1, and a limit ring 3 is set at a farther distance from the consumable 2. The limit ring 3 is connected to the fixed tube 1, and the consumable 2 also passes through the limit ring 3. Through the fixed tube 1 and the mounting ring 4 on the limit ring 3, multiple groups of driving components 7 and detection components 6 can be set according to the length of the consumable 2, and the multiple points of the consumable 2 can be detected according to the dislocation setting of the center position. Multiple mounting positions are set on the mounting ring 4, which can be used for the installation and use of multiple groups of detection components 6 and driving components 7. The driving force of the detection component 6 is provided by the torsion spring 43. When one side of the rope 73 is no longer restricted, the torsion spring 4 3 drives the plug shaft 42 and the connecting shaft 74 to rotate, so that the rope wheel 72 cooperates with the rope 73 to drive the detection component 6 to translate and contact with the fixed tube 1. When a certain position of the consumable 2 is broken, the detection component 6 at this position moves to the side of the fixed tube 1, and sends a reminder of material breakage through the contact switch 11. The bottom plate 61 is fixedly connected to the outer side of the rope 73 through the fixing block 612 at the bottom. The entire detection component 6 can move with the rope 73. In the initial state, the consumable 2 passes through the fixed tube 1 and the limit ring 3, and the arc plate 64 is pressed and contacted with the surface of the consumable 2. The slides 63 on both sides of the bottom of the arc plate 64 slide along the vertical frame 62 to compress the reset spring 610. At this time, the bottom of the arc plate 64 The extrusion block 65 at the top moves downward, and the extrusion groove 66 cooperates with the slot 68 to wrap the position where the rope 73 passes through. Since the inner wall of the extrusion groove 66 is provided with anti-slip grooves, under the extrusion effect, and the friction contact between the upper end of the arc plate 64 and the consumable 2, the upper end of the rope 73 cannot move, and then the entire rope 73 and the rope wheel 72 cannot be in a cyclic rotation state. When the consumable 2 near the arc plate 64 breaks, the arc plate 64 is no longer in extrusion contact with the consumable, so that the reset spring 610 drives the slide 63 and the arc plate 64 to move upward, and the extrusion block 65 and the extrusion groove 66 are away from the lower plate 67. At this time, the rope 73 is not restricted by the extrusion groove 66 and can move along the guide ring 69 and the slot 68. Move, through the setting of the guide ring and the slot 68, it is convenient to pass one side of the rope 73 through the bottom plate 61 along the path, so as to cooperate with the arc plate 64 to maintain stillness in the normal state, and the lower end fixed block 612 and the rope 73 pull the entire detection component 6 toward the side of the fixed tube 1 until it contacts and sends out a material break reminder signal. The size of the detection component 6 can be adjusted as needed to meet the requirement that more detection components 6 can be set on the surface of the consumable 2. At the same time, the detection components 6 are arranged at intervals along the center of the consumable 2. In this way, multiple groups of detection components 6 can perform separate detections on different positions of the consumable 2, and at the same time, the translation and contact with the fixed tube 1 do not interfere with each other.

[0036] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A material breakage detection device for a 3D printer, comprising a fixed tube (1), characterized in that: The fixed tube (1) is fixedly installed inside the body of the 3D printer, and the two ends of the fixed tube (1) slide through the consumables (2). A limiting ring (3) is provided at a farther end of one side of the fixed tube (1), and the limiting ring (3) is slidably sleeved on the surface of the far end of the consumables (2). The surfaces of the fixed tube (1) and the limiting ring (3) are both fixed with mounting rings (4). A plurality of groups of driving components (7) are equidistantly arranged at a circumference between the two mounting rings (4), and the driving component (7) comprises a mounting seat (71). The mounting seat (71) is clamped and installed on the surface of the mounting ring (4), and a rope wheel (72) is rotatably installed in the mounting seat (71) via a bearing. The rope wheels (72) at corresponding positions of the two mounting rings (4) are sleeved with ropes (73). A detection component (6) is installed on one side of the rope (73), and the detection component (6) comprises a bottom plate (61). One side of the bottom plate (61) is fixed to the rope (73), and An arc plate (64) is provided on the other side of the bottom plate (61), and the arc plate (64) is in pressure contact with the surface of the consumable (2). The drive assembly (7) further comprises a connecting shaft (74). One side of the rope pulley (72) is rotated to pass through the mounting seat (71) and is fixed with the connecting shaft (74). A plug-in shaft (42) is provided on the side of the mounting ring (4) corresponding to the connecting shaft (74), and the plug-in shaft (42) and the connecting shaft (74) are connected in a cross-plugging manner. A mounting frame (41) is fixed on the surface of the mounting ring (4) corresponding to the plug-in shaft (42) by screws, and the plug-in shaft (42) is rotatably mounted on the mounting frame (41) by bearings. A torsion spring (43) is installed at the rotational connection between the plug-in shaft (42) and the mounting frame (41). A contact column (611) is fixed on the side of the arc plate (64) facing the fixed tube (1), and the contact column (611) is in pressure contact with the contact switch (11) on the surface of the fixed tube (1).

2. A material breakage detection device for a 3D printer according to claim 1, characterized in that: The detection assembly (6) further comprises a vertical frame (62), the vertical frames (62) being fixed on both sides of the bottom plate (61), a slide frame (63) being fixed on both sides of the bottom of the arc plate (64), and the slide frame (63) being slidably mounted inside the vertical frame (62), a return spring (610) being fixed on the inner wall of the bottom of the vertical frame (62), and the other end of the return spring (610) being fixed to the bottom of the slide frame (63).

3. A material breakage detection device for a 3D printer according to claim 2, characterized in that: The bottom plate (61) is located between the two sliding frames and is fixed with a lower plate (67). A slot (68) is provided on the surface of the lower plate (67). One side of the rope (73) slides through the slot (68). An extrusion block (65) is fixed at the bottom of the arc plate (64), and the extrusion block (65) can be extruded and covered on the top of the slot (68).

4. A material breakage detection device for a 3D printer according to claim 3, characterized in that: The bottom of the extrusion block (65) is provided with an extrusion groove (66), and the inner wall of the extrusion groove (66) is provided with anti-slip grooves. The rope (73) passes through the upper end surface of the slot (68) and is in frictional contact with the extrusion groove (66).

5. A material breakage detection device for a 3D printer according to claim 4, characterized in that: Guide rings (69) are fixed on the two end surfaces of the bottom plate (61) located in the slot (68); the two ends of the rope (73) in the slot (68) pass through the two side guide rings (69); and the rope (73) passes through the guide rings (69) and the slot (68) in a U shape.

6. A material breakage detection device for a 3D printer according to claim 5, characterized in that: A fixing block (612) is fixed on the bottom surface of the bottom plate (61), and the surface on the other side of the rope (73) is fixedly connected to the fixing block (612).

7. The material breakage detection device for a 3D printer according to claim 1, characterized in that: A telescopic plate (5) is fixed to the top of the fixed tube (1), and the extended end of the telescopic plate (5) is fixedly connected to the limiting ring (3), and the fixed tube (1) and the limiting ring (3) are rigidly connected via the telescopic plate (5).

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