Extrusion mechanism and 3D printing device applying same

Abstract

The embodiment of the utility model provides an extrusion mechanism and a 3D printing device applying the extrusion mechanism. The extrusion mechanism comprises a pair of extrusion gears, a conveying channel used for conveying consumables is arranged between the pair of extrusion gears, and the pair of extrusion gears are used for extruding the consumables. The extrusion mechanism further comprises a transmission part, a shell, an elastic part and a detection prompt assembly. The transmission part is connected with one of the pair of extrusion gears; the elastic piece is clamped between the shell and the transmission piece and is used for abutting against the transmission piece to enable the transmission piece to have the trend of driving the pair of extrusion gears to intrude into the transmission channel; and the detection prompt assembly is connected to the shell, the detection prompt assembly comprises a trigger part, and the trigger part is in separable contact with the transmission part and is used for being pressed and triggered by the transmission part after the transmission part drives the pair of extrusion gears to invade into the transmission channel.

Description

Technical Field

[0001] This application relates to the field of 3D printing, and particularly to an extrusion mechanism and a 3D printing device applying the same. Background Art

[0002] 3D printing technology is a rapid prototyping technology that uses a digital model file as a basis and applies special wax materials, powdered metals, plastics, and other bondable materials to manufacture three-dimensional objects by printing layer upon layer of materials. Fused deposition modeling technology is one of the main 3D printing technologies. In this technology, a hot-melt filament is heated and melted and then extruded from a nozzle, deposited on a forming platform or the previously solidified material of the previous layer, and finally a physical object is generated.

[0003] When using plastic consumables, the commonly used technology is fused deposition modeling. The filamentous printing material is fed into a heating head, heated and melted, and then extruded through a nozzle of a fine nozzle and deposited on a workbench. When the material temperature is lower than the curing temperature, it starts to solidify, and finally a finished product is formed through the layer-by-layer stacking of the materials. If the printing material runs out during the printing process and the heating head continues to heat, it may cause the model printing to fail, damage the nozzle, and pose a fire risk. Therefore, a device is needed to detect whether the printing material has run out. If there is no material, the nozzle heating will be stopped and the printing will be stopped. This device is called a material shortage detection device. However, the current material shortage detection device and the feeder are usually two relatively separated parts, with a complex structure, low automation degree, and often insufficiently timely and accurate monitoring of material shortage.

[0004] How to solve the above problems and provide an extrusion mechanism with an automatic material shortage monitoring function is what those skilled in the art need to consider. Utility Model Content

[0005] To solve the problems in the prior art, the embodiments of this application provide an extrusion mechanism with an automatic material shortage monitoring function and a 3D printing device applying the same.

[0006] The embodiments of this application provide an extrusion mechanism, which includes a pair of extrusion gears. A transmission channel for transmitting consumables is provided between the pair of extrusion gears, and the pair of extrusion gears are used for extruding the consumables. The extrusion mechanism further includes:

[0007] A transmission member connected to one of the pair of extrusion gears;

[0008] A housing and an elastic member, the elastic member is clamped between the housing and the transmission member and is used to hold the transmission member so that it has a tendency to drive the pair of extrusion gears to invade the transmission channel;

[0009] A detection prompt component is connected to the housing, and includes a trigger portion, which is in detachable contact with the transmission member and is used to be pressed and triggered by the transmission member after the transmission member drives the pair of extrusion gears to invade the transmission channel.

[0010] In one embodiment, the transmission member includes a movable end and a connecting end, the connecting end is movably connected to the shell, the elastic member can push the transmission member to move the movable end relative to the shell with the connecting end as the axis, and the movable end is in detachable contact with the trigger part.

[0011] In one embodiment, the elastic member and the trigger portion are respectively arranged on opposite sides of the line connecting the movable end and the connecting end, and the trigger portion and the transmission channel are located on the same side of the line connecting the movable end and the connecting end.

[0012] In one embodiment, the trigger portion includes a functional body and a switch that are movably connected, the switch protrudes from the functional body and extends out of the housing, the switch is detachably in contact with the movable end, and the switch is constructed to be able to be compressed into the functional body and trigger the functional body to generate a trigger signal.

[0013] In one embodiment, the housing includes a bottom plate portion and a side plate portion, the transmission member and the detection prompt assembly are respectively connected to the bottom plate portion, the side plate portion and the transmission member are spaced apart, and the elastic member is disposed between the side plate portion and the transmission member.

[0014] In one embodiment, the transmission channel and the side plate are respectively located on two sides opposite to each other of the transmission member, and the triggering portion and the side plate are respectively located on two sides opposite to each other of the elastic member.

[0015] In one embodiment, the trigger portion and the transmission channel are located on the same side of the transmission member away from the side plate portion, the detection prompt component includes an untriggered state and a triggered state, the transmission member is used to move a first displacement to trigger the detection prompt component to switch from the untriggered state to the triggered state, the width of the first displacement is smaller than the width of the transmission channel, the transmission member includes a first part and a second part that are connected, the first part, the side plate portion and the elastic member are located on the same side of the bottom plate portion, the elastic member is provided between the first part and the side plate portion, the second part and the trigger portion are located on the same side of the bottom plate portion, the trigger portion is located on the side of the bottom plate portion and protrudes to the outside of the bottom plate portion compared to the side, and the second part is located on the side of the side away from the bottom plate portion.

[0016] In one embodiment, the detection prompt component further includes an electric board portion and a prompt light, the trigger portion and the prompt light are electrically connected to the electric board portion, and the electric board portion and the prompt light are located on a side of the bottom plate portion away from the transmission member.

[0017] In one embodiment, the bottom plate is provided with a through hole, the warning light is arranged corresponding to the through hole so that the warning light is exposed, the transmission member is arranged to cover the through hole, and the area of ​​the transmission member corresponding to the through hole is transparent.

[0018] The embodiment of the present application also provides a 3D printing device, which includes a molding platform, a driving component and an extrusion mechanism as described in any one of the above embodiments, wherein the driving component drives the extrusion mechanism to move relative to the molding platform.

[0019] It can be understood that in the extrusion mechanism of the present application, the elastic member can support the transmission member so that it has a tendency to drive a pair of extrusion gears to invade the transmission channel. When the extrusion mechanism is in a state of no shortage of materials, there are consumables in the transmission channel, and the consumables support the pair of extrusion gears so that they cannot further invade the transmission channel. However, when the extrusion mechanism is in a state of shortage of materials, there are no consumables in the transmission channel, and the pair of extrusion gears lose the support of the consumables. Furthermore, the transmission member connected to the extrusion gear also loses the support of the consumables, and the transmission member invades toward one side of the transmission channel under the push of the elastic member, which can cause the transmission member to press the trigger part to trigger the detection prompt component to issue a shortage reminder, thereby enabling the extrusion mechanism to have the function of automatic shortage monitoring. Brief Description of the Figures

[0020] Figure 1 This is a three-dimensional schematic diagram of an extrusion mechanism provided in an embodiment of the present application from one angle.

[0021] Figure 2 This is a partial three-dimensional schematic diagram of the extrusion mechanism provided in the embodiment of the present application.

[0022] Figure 3 This is a partial three-dimensional schematic diagram of the extrusion mechanism provided in the embodiment of the present application.

[0023] Figure 4 This is a partial three-dimensional schematic diagram of the extrusion mechanism provided in the embodiment of the present application.

[0024] Figure 5 This is a schematic diagram of the working state of the extrusion mechanism provided in the embodiment of the present application.

[0025] Figure 6 This is a schematic diagram of the working state of the extrusion mechanism provided in the embodiment of the present application.

[0026] Figure 7 This is a three-dimensional schematic diagram of the 3D printing device provided in the embodiment of the present application.

[0027] Description of Main Component Symbols

[0028] Extrusion Mechanism 10

[0029] Extrusion Gear 11

[0030] Transport Channel 12

[0031] Housing 13

[0032] Bottom Plate Portion 131

[0033] Main Plane 1311

[0034] Side Surface 1312

[0035] Through Hole 1313

[0036] Side Plate Portion 132

[0037] Limit Groove 1321

[0038] Elastic Member 14

[0039] Transmission Member 15

[0040] First Portion 151

[0041] Second Portion 152

[0042] Connection End 153

[0043] Movable End 154

[0044] Detection and Prompt Component 16

[0045] Trigger Portion 161

[0046] Functional Body 1611

[0047] Switch 1612

[0048] Hypotenuse 1613

[0049] Battery Portion 162

[0050] Indicator Light 163

[0051] 3D Printing Device 1

[0052] Forming Platform 17

[0053] Drive Component 18

[0054] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. Specific Embodiments

[0055] The following description will more fully describe the content of the present application with reference to the accompanying drawings. The exemplary embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete and to fully convey the scope of the present application to those skilled in the art. Like reference numerals denote the same or similar components. The terms used herein are for the purpose of describing particular exemplary embodiments only and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. Further, when used herein, "comprising" and / or "including" and / or "having", integers, steps, operations, components and / or components are included, but do not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Further, unless explicitly defined herein, terms such as those defined in a general dictionary should be construed to have a meaning consistent with their meaning in the relevant art and the content of this application and will not be construed as idealized or overly formal meanings.

[0056] Generally, when using plastic consumables, the commonly used technology is fused deposition modeling. The filamentous printing material is fed into the heating head and melted by heating, and then extruded through a nozzle of a fine nozzle and deposited on the workbench. When the material temperature is lower than the curing temperature, it starts to cure, and the finished product is finally formed through the layer-by-layer stacking of the material. During the printing process, if the printing material runs out and the heating head continues to heat, it will cause the model printing to fail, damage the nozzle, and there is a risk of fire. Therefore, a device is needed to detect the exhaustion of the printing material. If there is no material, the heating of the nozzle will be stopped and the printing will be stopped. This device is called a material shortage detection device. However, the current material shortage detection device and the feeder are two relatively separate parts, with a relatively complex structure and lack of automation, and the monitoring of material shortage is often inaccurate.

[0057] Correspondingly, an embodiment of the present application provides an extrusion mechanism and a 3D printing device using the same. The extrusion mechanism includes a pair of extrusion gears, a transmission channel for transmitting consumables is provided between the pair of extrusion gears, and the pair of extrusion gears are used for extruding the consumables. The extrusion mechanism further includes a transmission member, a housing, an elastic member, and a detection and prompting component; the transmission member is connected to one of the pair of extrusion gears; the elastic member is clamped between the housing and the transmission member and is used for pressing against the transmission member so that it has a tendency to drive the pair of extrusion gears to invade the transmission channel; the detection and prompting component is connected to the housing, and the detection and prompting component includes a triggering portion, and the triggering portion is detachably in contact with the transmission member and is used for being pressed by the transmission member to trigger after the transmission member drives the pair of extrusion gears to invade the transmission channel.

[0058] Furthermore, in the extrusion mechanism of the present application, the elastic member can press against the transmission member so that it has a tendency to drive the pair of extrusion gears to invade the transmission channel. When the extrusion mechanism is in a state of not lacking materials, there are consumables in the transmission channel, and the consumables hold the pair of extrusion gears so that they cannot further invade the transmission channel. However, when the extrusion mechanism is in a state of lacking materials, there are no consumables in the transmission channel, and the pair of extrusion gears lose the support of the consumables. Further, the transmission member connected to the extrusion gears also loses the support of the consumables. The transmission member invades toward the transmission channel side under the push of the elastic member, and can press the triggering portion to trigger the detection and prompting component to send out a lack-of-materials reminder, so that the extrusion mechanism has the function of automatically monitoring the lack of materials.

[0059] Those skilled in the art can understand that "3D printing" refers to a technology that constructs an object by layer-by-layer printing based on a digital model file and using bondable materials such as powdered metal or plastic.

[0060] The following content will describe exemplary embodiments in conjunction with the accompanying drawings. It should be noted that the components depicted in the reference drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar reference numerals or similar technical terms.

[0061] The following will refer to the accompanying drawings to further describe in detail the specific embodiments of the present application.

[0062] As Figures 1 to 4As shown in the figure, an extrusion mechanism 10 provided by an embodiment of the present application includes a pair of extrusion gears 11. A transmission channel 12 for transmitting consumables (not shown in the figure) is provided between the pair of extrusion gears 11, and the pair of extrusion gears 11 are used for extruding the consumables. The extrusion mechanism 10 further includes a transmission member 15, a housing 13, an elastic member 14, and a detection and prompting assembly 16. The pair of extrusion gears 11 are connected to the housing 13, and the transmission member 15, the elastic member 14, and the detection and prompting assembly 16 are also respectively connected to the housing 13. The transmission member 15 is connected to one of the pair of extrusion gears 11. The detection and prompting assembly 16 is separably in contact with the transmission member 15 and is located on the same side of the transmission member 15 as the pair of extrusion gears 11. The elastic member 14 abuts against the transmission member 15 and is located on the other side of the transmission member 15.

[0063] In one embodiment, the elastic member 14 is clamped between the housing 13 and the transmission member 15 and is used for abutting against the transmission member 15 to make it have a tendency to drive the pair of extrusion gears 11 to invade the transmission channel 12. The detection and prompting assembly 16 includes a triggering portion 161. The triggering portion 161 is separably in contact with the transmission member 15 and is used for being pressed and triggered by the transmission member 15 after the transmission member 15 drives the pair of extrusion gears 11 to invade the transmission channel 12.

[0064] It can be understood that in the extrusion mechanism 10 of the present application, the elastic member 14 can abut against the transmission member 15 to make it have a tendency to drive the pair of extrusion gears 11 to invade the transmission channel 12. When the extrusion mechanism 10 is in a non-material-deficient state, there are consumables in the transmission channel 12, and the consumables hold up the pair of extrusion gears 11 so that they cannot further invade the transmission channel 12. However, when the extrusion mechanism 10 is in a material-deficient state, there are no consumables in the transmission channel 12. The pair of extrusion gears 11 lose the support of the consumables, and the transmission member 15 connected to the extrusion gears 11 also loses the support of the consumables. The transmission member 15 invades toward the transmission channel 12 side under the push of the elastic member 14. At the same time, the transmission member 15 presses the triggering portion 161 to trigger the detection and prompting assembly 16 to send out a material-deficient reminder, so that the extrusion mechanism 10 has the function of automatically monitoring material deficiency.

[0065] In one embodiment, the transmission member 15 includes a movable end 154 and a connection end 153. The connection end 153 is movably connected to the housing 13. The elastic member 14 can push the transmission member 15 to move the movable end 154 relative to the housing 13 with the connection end 153 as the axis, and the movable end 154 is separably in contact with the triggering portion 161.

[0066] In this embodiment, the transmission member 15 is roughly in the shape of a plate with a certain thickness, and the movable end 154 and the connecting end 153 are two ends of the plate-shaped transmission member 15 spaced apart along the length direction. The connecting end 153 is connected to the housing 13 through a connecting member such as a bolt or a bearing, and the transmission member 15 can deflect and displace with the connecting structure of the connecting end 153 and the bolt or bearing as an anchor point, especially causing the movable end 154 to displace, thereby achieving contact and separation between the movable end 154 and the triggering part 161.

[0067] In one embodiment, the elastic member 14 and the trigger portion 161 are respectively disposed on opposite sides of the line connecting the movable end 154 and the connecting end 153, and the trigger portion 161 and the transmission channel 12 are located on the same side of the line connecting the movable end 154 and the connecting end 153.

[0068] In this embodiment, the transmission member 15 is roughly in the shape of a sheet with a certain thickness, and the elastic member 14 and the trigger portion 161 are respectively arranged on two opposite sides of the transmission member 15 along the thickness direction of the transmission member 15; the trigger portion 161 and the transmission channel 12 are located on the same side of the transmission member 15 along the thickness direction of the transmission member 15, and at the same time, the elastic member 14 located on the other side can be in a compressed or naturally stretched state, and the two ends of the elastic member 14 spaced along the thickness direction of the transmission member 15 are respectively against the protruding part of the housing 13 along the width direction of the transmission member 15 and the movable end 154.

[0069] It can be understood that one end of the elastic member 14 is supported by the housing 13, and the other end, under the action of its own elastic force, presses against the side of the movable end 154 away from the trigger portion 161, and pushes the movable end 154 toward the side where the trigger portion 161 is located, so that the movable end 154 can press against the trigger portion 161 to trigger the detection prompt component 16.

[0070] In one embodiment, the housing 13 includes a bottom plate portion 131 and a side plate portion 132, and the bottom plate portion 131 is connected to the side plate portion 132. The transmission member 15 and the detection prompt component 16 are respectively connected to the bottom plate portion 131, the side plate portion 132 and the transmission member 15 are spaced apart, and the elastic member 14 is disposed between the side plate portion 132 and the transmission member 15.

[0071] In one embodiment, the transmission channel 12 and the side plate portion 132 are respectively located on two opposite sides of the transmission member 15, the trigger portion 161 and the side plate portion 132 are respectively located on two opposite sides of the elastic member 14, and there is a gap between the side plate portion 132 and the transmission member 15 that is sufficient for the transmission member 15 to move.

[0072] In this embodiment, the bottom plate portion 131 is generally in the shape of a plate with a certain thickness, and the bottom plate portion 131 includes a main plane 1311 and a plurality of side surfaces 1312 arranged around the main plane 1311. A pair of extrusion gears 11, elastic member 14 and side plate portion 132 are all arranged on the side where the main plane 1311 is located, the triggering portion 161 is arranged on one side 1312, and the main body of the transmission member 15 is located on the side where the main plane 1311 is located, and the portion thereof for contacting with the triggering portion 161 extends to the side where the triggering portion 161 is located.

[0073] In this embodiment, a limiting groove 1321 is provided on each of the side plate portion 132 and the transmission member 15, and both ends of the elastic member 14 are respectively disposed in the limiting groove 1321 to prevent the elastic member 14 from being misaligned, thereby improving the reliability of the extrusion mechanism 10.

[0074] In one embodiment, the trigger portion 161 and the transmission channel 12 are located on the same side of the transmission member 15 away from the side plate portion 132, and the detection prompt component 16 includes an untriggered state and a triggered state. The transmission member 15 is used to move the first displacement to trigger the detection prompt component 16 to switch from the untriggered state to the triggered state, and the width of the first displacement is smaller than the width of the transmission channel 12.

[0075] It can be understood that the elastic member 14 can be in a compressed or naturally stretched state, and the two ends of the elastic member 14 spaced along the length direction of the bottom plate portion 131 respectively press against the transmission member 15 on one side of the transmission member 15 and the side of the side plate portion 132 on the transmission member 15. One end of the elastic member 14 is supported by the side plate portion 132, and the other end presses against the side of the transmission member 15 away from the trigger portion 161 under the action of its own elastic force, so that the transmission member 15 moves toward the side where the trigger portion 161 is located by the first displacement and contacts the trigger portion 161, and the detection prompt component 16 is triggered by pressing the trigger portion 161, thereby switching the shift trigger detection prompt component 16 from the untriggered state to the triggered state.

[0076] In one embodiment, the transmission member 15 includes a first portion 151 and a second portion 152 connected to each other. The first portion 151, the side plate portion 132 and the elastic member 14 are located on the same side of the bottom plate portion 131, and the elastic member 14 is disposed between the first portion 151 and the side plate portion 132. The second portion 152 and the trigger portion 161 are located on the same side of the bottom plate portion 131, the trigger portion 161 is located on the side 1312 of the bottom plate portion 131 and protrudes to the outside of the bottom plate portion 131 compared to the side 1312, and the second portion 152 is located on the side 1312 away from the bottom plate portion 131.

[0077] It can be understood that the first part 151 and the second part 152 can be integrally formed, and the second part 152 is extended along the thickness direction of the bottom plate 131 toward the other side of the main plane 1311 connected to the side surface 1312 compared to the first part 151, so that the second part 152 can achieve detachable contact with the trigger part 161.

[0078] In one embodiment, the triggering part 161 includes a functional body 1611 and a switch 1612 that are movably connected. The switch 1612 is protruding from the functional body 1611 and extending out of the housing 13. The switch 1612 is in detachable contact with the movable end 154. The switch 1612 is configured to be able to shrink into the functional body 1611 under pressure and trigger the functional body 1611 to generate a trigger signal. The switch 1612 is also configured to be able to automatically reset when the pressure is removed. Specifically, the functional body 1611 is disposed on a side of the bottom plate 131 away from the first part 151. The switch 1612 is connected to the functional body 1611 and extends from the side 1312 to the outside of the bottom plate 131 so as to contact the second part 152.

[0079] It can be understood that the functional body 1611 may include piezoelectric parts (not shown) such as piezoelectric materials or pressure-sensitive materials that can convert pressure into electrical signals. The switch 1612 is squeezed by the active end 154 and contracts toward the inside of the functional body 1611, thereby further squeezing the piezoelectric parts in the functional body 1611. The piezoelectric parts are compressed to generate corresponding trigger signals, which are usually electrical signals. The functional body 1611 can adopt a known and feasible structure, and its specific structure and working principle are not repeated here.

[0080] Further integration Figure 5 and Figure 6As shown, in this embodiment, the switch 1612 can be a triangular pressing piece, and one bottom side (not shown) of the triangular switch 1612 contacts the piezoelectric part (not shown) inside the functional body 1611. The hypotenuse 1613 of the triangular switch 1612 is arranged to face the side of the movable end 154. When the second part 152 contacts the hypotenuse 1613 and transmits the pressure to the functional body 1611 through the switch 1612, the functional body 1611 is triggered to generate the trigger signal. In addition, an elastic part (not shown) can be provided in the connection structure between the switch 1612 and the functional body 1611. The elastic part contacts the switch 1612. When the switch 1612 is compressed and shrinks into the functional body 1611, the elastic part is deformed and stores elastic potential energy. When the pressure applied to the switch 1612 by the movable end 154 is reduced or cancelled, the elastic part releases the stored elastic potential energy and is deformed to push the switch 1612 to reset, so that the hypotenuse 1613 returns to the predetermined position. It can be understood that the connection structure between the switch 1612 and the functional body 1611 can adopt a known and feasible structure, and its specific structure and working principle are not described here.

[0081] In other embodiments, the trigger portion 161 may also be squeezed by the second portion 152 but not deformed, and the pressure of the second portion 152 squeezing the trigger portion 161 may cause a changing electrical signal to be generated inside the trigger portion 161, thereby triggering the detection prompt component 16.

[0082] In one embodiment, the detection prompt component 16 further includes an electric board portion 162 and a prompt light 163. The trigger portion 161 and the prompt light 163 are both electrically connected to the electric board portion 162, and the electric board portion 162 and the prompt light 163 are located on a side of the bottom plate portion 131 away from the transmission member 15.

[0083] In this embodiment, the electric board portion 162 is generally in the shape of a long strip and extends on the back of the bottom plate portion 131 to improve space utilization. The warning light 163 is arranged on the surface of the electric board and electrically connected thereto. The trigger portion 161 is arranged at the end of the electric board portion 162 and electrically connected thereto. There is electrical signal interaction between the warning light 163 and the trigger portion 161 and the electric board portion 162. The electric board portion 162 controls the warning light 163 to light up or turn off by receiving the electrical signal generated by the trigger portion 161. It can be understood that the electric board portion 162 and the warning light 163 can both adopt known and feasible structures, which will not be described in detail here.

[0084] In one embodiment, the bottom plate 131 is provided with a through hole 1313, the warning light 163 is arranged corresponding to the through hole 1313 so that the warning light 163 is exposed, the transmission member 15 is arranged to cover the through hole 1313, and the area of ​​the transmission member 15 corresponding to the through hole 1313 is transparent.

[0085] It can be understood that a through hole 1313 penetrating the main plane 1311 is provided, and the light emitted by the indicator light 163 can pass through the through hole 1313 and penetrate to the front of the housing 13; although the transmission member 15 is arranged corresponding to the through hole 1313, the transmission member 15 can be made of a transparent material so that the light emitted by the indicator light 163 can pass through, improving the overall space utilization rate of the extrusion mechanism 10. Further, the material of the transmission member 15 can be a known material that meets the requirements, which will not be elaborated here.

[0086] It can be understood that the extrusion mechanism 10 may further include a driving unit (not shown in the figure) drivingly connected to the extrusion gear 11. The driving unit can be selected from known and feasible components, such as a motor. One of the pair of extrusion gears 11 that is not connected to the transmission member 15 is connected to the output end of the driving unit. Those skilled in the art can understand that the position of the driving unit relative to the extrusion gear 11 and the housing 13 can be adjusted according to the actual situation, and its specific setting method and the specific signal parameters in the driving unit will not be elaborated here.

[0087] Further in combination with Figure 7 As shown, the embodiment of the present application further provides a 3D printing device 1, which includes a forming platform 17, a driving component 18, and an extrusion mechanism 10 according to any one of the foregoing embodiments. The driving component 18 drives the extrusion mechanism 10 to move relative to the forming platform 17.

[0088] In the foregoing, the specific embodiments of the present application have been described with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that various changes and substitutions can be made to the specific embodiments of the present application without departing from the spirit and scope of the present application. These changes and substitutions all fall within the scope defined by the present application.

Claims

1. An extrusion mechanism, comprising a pair of extrusion gears, wherein a transmission channel for transmitting consumables is provided between the pair of extrusion gears, and the pair of extrusion gears are used to extrude the consumables, characterized in that: The extrusion mechanism also includes: a transmission member connected to one of the pair of extrusion gears; A housing and an elastic member, wherein the elastic member is sandwiched between the housing and the transmission member and is used to resist the transmission member so that it has a tendency to drive the pair of extrusion gears to invade the transmission channel; A detection prompt component is connected to the shell, and the detection prompt component includes a trigger part, which is detachably in contact with the transmission member and is used to be triggered by the transmission member after the transmission member drives the pair of extrusion gears to invade the transmission channel.

2. The extrusion mechanism according to claim 1, characterized in that: The transmission member includes a movable end and a connecting end, the connecting end is movably connected to the shell, the elastic member can push the transmission member to move the movable end relative to the shell with the connecting end as the axis, and the movable end is in detachable contact with the trigger part.

3. The extrusion mechanism according to claim 2, characterized in that: The elastic member and the trigger portion are respectively arranged on opposite sides of a line connecting the movable end and the connecting end, and the trigger portion and the transmission channel are located on the same side of the line connecting the movable end and the connecting end.

4. The extrusion mechanism according to claim 2, characterized in that: The trigger part includes a functional body and a switch that are movably connected. The switch protrudes from the functional body and extends out of the shell. The switch is detachably contacted with the movable end. The switch is constructed to be able to shrink into the functional body under pressure and trigger the functional body to generate a trigger signal.

5. The extrusion mechanism according to claim 1, characterized in that: The shell includes a bottom plate portion and a side plate portion, the transmission member and the detection prompt component are respectively connected to the bottom plate portion, the side plate portion and the transmission member are spaced apart, and the elastic member is arranged between the side plate portion and the transmission member.

6. The extrusion mechanism according to claim 5, characterized in that: The transmission channel and the side plate portion are respectively located on two sides opposite to each other of the transmission member, the trigger portion and the side plate portion are respectively located on two sides opposite to each other of the elastic member, the trigger portion and the transmission channel are located on the same side of the transmission member away from the side plate portion, the detection prompt component includes an untriggered state and a triggered state, the transmission member is used to move a first displacement to trigger the detection prompt component to switch from the untriggered state to the triggered state, and the width of the first displacement is smaller than the width of the transmission channel.

7. The extrusion mechanism according to claim 5, characterized in that: The transmission member includes a first part and a second part that are connected, the first part, the side plate part and the elastic member are located on the same side of the bottom plate part, the elastic member is arranged between the first part and the side plate part, the second part and the trigger part are located on the same side of the bottom plate part, the trigger part is located on the side of the bottom plate part and protrudes to the outside of the bottom plate part compared to the side, and the second part is located on the side away from the bottom plate part.

8. The extrusion mechanism according to claim 5, characterized in that: The detection prompt component also includes an electric board part and a prompt light. The trigger part and the prompt light are electrically connected to the electric board part. The electric board part and the prompt light are located on a side of the bottom plate part away from the transmission member.

9. The extrusion mechanism according to claim 8, characterized in that: The bottom plate is provided with a through hole, the warning light is arranged corresponding to the through hole so that the warning light is exposed, the transmission member is arranged to cover the through hole, and the area of ​​the transmission member corresponding to the through hole is transparent.

10. A 3D printing device, characterized in that: It comprises a molding platform, a driving component and an extrusion mechanism as described in any one of claims 1 to 9, wherein the driving component drives the extrusion mechanism to move relative to the molding platform.

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