Consumable conveying buffer device and 3D printer

Abstract

The utility model discloses a consumable conveying buffer device and a 3D printer, the consumable conveying buffer device comprises a shell, a first material pipe fixedly arranged on the shell, a second material pipe communicated with the first material pipe and capable of moving relative to the first material pipe, and a buffer assembly, and the buffer assembly comprises a first elastic connecting piece and a second elastic connecting piece. According to the consumable conveying buffer device, consumable conveying can be subjected to buffer adjustment, meanwhile, the buffer assembly buffers the large acting force borne by the second material pipe, and it is guaranteed that under the condition that the situation that consumable conveying is inconsistent is buffered, the consumable conveying efficiency is improved; and structural damage caused by direct contact between the two ends of the second material pipe and the inner walls of the first material pipe and the second shell is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a consumable transmission buffer device and a 3D printer. Background Art

[0002] 3D printing is a technology that constructs three-dimensional entities by using consumables to print layer by layer based on digital model files. Usually, during the 3D printing process, it involves the transmission of consumables between multiple different consumable transmission devices and print heads. If the transmission of consumables between multiple different consumable transmission devices is inconsistent during the transmission process, it will lead to inconsistent transmission of consumables, resulting in problems such as consumable material breakage, blockage, and even failure to print, thereby reducing the quality of 3D printing. Therefore, how to improve the consistency of consumable transmission between multiple different consumable transmission devices is very important for ensuring the quality of 3D printing. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the above problems and provide a consumable transmission buffer device and a 3D printer. The consumable transmission buffer device is arranged between different consumable transmission devices to buffer and adjust the transmission of consumables, ensuring consistent transmission of consumables between different consumable transmission devices.

[0004] To solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0005] In the first aspect, the utility model provides a consumable transmission buffer device, including:

[0006] A housing, including a first housing and a second housing covering the first housing;

[0007] A first material pipe, fixedly arranged in the first housing along a first direction;

[0008] A second material pipe, which is communicated with the first material pipe and can move relative to the first material pipe;

[0009] A buffer assembly, including a first elastic connecting member and a second elastic connecting member. The first elastic connecting member is arranged between the first end of the second material pipe and the first end of the first material pipe, and the second elastic connecting member is arranged between the second end of the second material pipe and the inner wall of the second housing.

[0010] Optionally, both the first elastic connecting member and the second elastic connecting member are compression springs.

[0011] Optionally, the second material pipe is sleeved on the first material pipe; the first material pipe includes a first main body and a first end portion, the first end portion is arranged at one end of the first main body close to the first end, and the outer contour dimension of the first end portion is larger than the outer contour dimension of the first main body; the second material pipe includes a second main body, a second end portion and a third end portion, the second end portion is arranged at one end of the second main body close to the first end, the third end portion is arranged at one end of the second main body close to the second end, the first elastic connecting member is sleeved on the first main body and arranged between the first end portion and the second end portion; a connecting groove is arranged at the third end portion, and the connecting groove is configured to be connected with the first end of the second elastic connecting member.

[0012] Optionally, the first end of the first elastic connecting member is fixedly connected to the first end portion, the first end of the second elastic connecting member is fixedly connected to the connecting groove, and the second end of the second elastic connecting member protrudes from the second end of the second material pipe.

[0013] Optionally, the second end of the first elastic connecting member is fixedly connected to the second end portion, the second end of the second elastic connecting member is fixedly connected to the inner wall of the second housing, and the second elastic connecting member is aligned with the connecting groove.

[0014] Optionally, an adjusting piece is arranged on the second material pipe, an adjusting hole is formed in the second housing, and the adjusting piece extends from the adjusting hole of the second housing to the outside of the second housing along the second direction.

[0015] Optionally, connecting plates are arranged on both sides of the second main body, a first support plate is arranged on the first housing, and the connecting plates extend along the third direction to abut against the first support plate.

[0016] Optionally, a second support plate is arranged in the area where the second housing is aligned with the first support plate, a channel is formed between the second support plate and the first support plate, and a part of the connecting plate extends into the channel.

[0017] Optionally, a protrusion is arranged on one side of the second main body facing the first housing, the consumable transmission buffer device further includes an induction detection member, the induction detection members are respectively arranged at two limit positions where the protrusion moves, and the induction detection member is configured to detect whether the protrusion moves in place to the limit position.

[0018] Optionally, a first material inlet and a second material inlet are respectively provided at two ends of the housing. The first material inlet is communicated with the first material pipe through a first material conveying member, and the second material inlet is communicated with the second material pipe through a second material conveying member; the number of the first material inlets is at least 1, the first material conveying member includes a plurality of consumable material transmission channels, and the number of the consumable material transmission channels is equal to the number of the first material inlets.

[0019] In a second aspect, the present invention provides a 3D printer, and the 3D printer includes the consumable material transmission buffer device as described above.

[0020] The beneficial effects produced by the present invention at least include:

[0021] In the consumable material transmission buffer device of the present invention, during the consumable material transmission process, when the transmission actions of the consumable materials by the upper-stage consumable material transmission device and the lower-stage consumable material transmission device connected to the consumable material transmission buffer device are inconsistent, the second material pipe moves relative to the first material pipe under the drive of the consumable material to buffer the acting force received by the consumable material. When the acting force on the consumable material is too large, causing the acting force on the second material pipe to be too large and the second material pipe to move a large distance relative to the first material pipe, the first elastic connecting member can buffer the acting force between the second material pipe and the first material pipe, and the second elastic connecting member can buffer the acting force between the second material pipe and the inner wall of the second housing, so that the first end and the second end of the second material pipe can be in flexible contact with the first material pipe and the inner wall of the second housing respectively. When there is a large deviation in the consumable material transmission between the upper-stage and lower-stage consumable material transmission devices connected to the consumable material transmission buffer device, the buffer assembly buffers the large acting force received by the second material pipe, ensuring that the condition of buffering the inconsistent consumable material transmission is met, and avoiding structural damage caused by direct contact between the two ends of the second material pipe and the inner walls of the first material pipe and the second housing, thereby improving the overall structural stability and service life of the consumable material transmission buffer device. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the overall structure of the consumable material transmission buffer device of the present invention.

[0023] Figure 2 is Figure 1 a top view of the shown consumable material transmission buffer device.

[0024] Figure 3 is Figure 2 a cross-sectional schematic diagram along A-A in the view.

[0025] Figure 4 is Figure 2 a cross-sectional schematic diagram along B-B in the view.

[0026] Figure 5 This is a schematic internal structure diagram of the consumable transmission buffer device of the present utility model.

[0027] Figure 6 This is a top view of the internal structure of the consumable transmission buffer device.

[0028] Wherein, 1 - housing, 11 - first housing, 111 - first support plate, 12 - second housing, 121 - adjustment hole, 122 - second support plate, 13 - first material inlet, 14 - second material inlet, 2 - first material pipe, 21 - first main body, 22 - first end portion, 23 - first end, 3 - second material pipe, 31 - second main body, 311 - connecting plate, 312 - protrusion, 32 - second end portion, 33 - third end portion, 331 - connecting groove, 34 - adjustment piece, 35 - first end, 36 - second end, 4 - buffer assembly, 41 - first elastic connecting member, 411 - first end, 412 - second end, 42 - second elastic connecting member, 421 - first end, 422 - second end, 5 - channel, 6 - induction detection member, 7 - first material conveying member, 71 - consumable transmission channel, 8 - second material conveying member, x - first direction, z - second direction, y - third direction, a - first end, b - second end. Detailed implementation manners

[0029] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure content of the present utility model more thorough and comprehensive.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0031] In the present utility model, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features.

[0032] In the description of the present utility model, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0033] Embodiment

[0034] See Figures 1 to 4 As shown, the present utility model provides a consumable transmission buffer device, which includes:

[0035] A housing 1, including a first housing 11 and a second housing 12 covering the first housing 11;

[0036] A first material pipe 2, fixedly arranged along the first direction x in the first housing 11;

[0037] A second material pipe 3, the second material pipe 3 is communicated with the first material pipe 2, and the second material pipe 3 can move relative to the first material pipe 2;

[0038] A buffer assembly 4, configured to buffer the acting forces received at both ends of the second material pipe 3; the buffer assembly 4 includes a first elastic connecting member 41 and a second elastic connecting member 42. The first elastic connecting member 41 is arranged between the first end 35 of the second material pipe 3 and the first end 23 of the first material pipe 2, and the second elastic connecting member 42 is arranged between the second end 36 of the second material pipe 3 and the inner wall of the second housing 12. Wherein, the first end 35 and the second end 36 of the second material pipe 3 are opposite ends of the second material pipe 3, and the first end 23 of the first material pipe 2 and the first end 35 of the second material pipe 3 are both arranged in the direction close to the first end a.

[0039] During the process of consumable transmission, when the transmission actions of the upper-level consumable transmission device and the lower-level consumable transmission device connected to the consumable transmission buffer device for the consumable are inconsistent, the second material pipe 3 moves relative to the first material pipe 2 under the drive of the consumable to buffer the acting force received by the consumable. When the force on the consumable is too large, causing the force on the second material pipe 3 to be too large and move a large distance relative to the first material pipe 2, the first elastic connecting member 41 can buffer the acting force between the second material pipe 3 and the first material pipe 2, and the second elastic connecting member 42 can buffer the acting force between the second material pipe 3 and the inner wall of the second housing 12, so that the first end 35 and the second end of the second material pipe 3 can respectively make flexible contact with the first material pipe 2 and the inner wall of the second housing 12. When there is a large deviation in the consumable transmission between the upper and lower consumable transmission devices connected to the consumable transmission buffer device, the buffer assembly 4 buffers the large acting force received by the second material pipe 3, ensuring that the condition of buffering the inconsistent consumable transmission is met, and avoiding the structural damage caused by the direct contact between the two ends of the second material pipe 3 and the inner walls of the first material pipe 2 and the second housing 12, and improving the overall structural stability and service life of the consumable transmission buffer device.

[0040] It should be noted that in the present utility model, the first end a refers to the end where the consumable transmission buffer device is connected to the upper-level consumable transmission device, and the second end b refers to the end where the consumable transmission buffer device is connected to the lower-level consumable transmission device; the first direction x, the second direction z, and the third direction y are perpendicular to each other in space.

[0041] Optionally, both the first elastic connector 41 and the second elastic connector 42 are compression springs. By setting the first elastic connector 41 and the second elastic connector 42 as compression springs, during installation, one end of the first elastic connector 41 and the second elastic connector 42 can be fixedly installed. During the movement of the second material tube 3, the first elastic connector 41 deforms under the action of the force between the second material tube 3 and the first material tube 2, buffering the force received by the first end 35 of the second material tube 3. The second elastic connector 42 deforms under the action of the force between the second material tube 3 and the inner wall of the second housing 12, buffering the force received by the second end 36 of the second material tube 3.

[0042] See Figures 3 to 5 As shown, the second material tube 3 is sleeved on the first material tube 2; the first material tube 2 includes a first main body 21 and a first end portion 22. The first end portion 22 is provided at one end of the first main body 21 close to the first end a. The outer contour dimension of the first end portion 22 is larger than that of the first main body 21. The first end portion 22 plays a limiting role on the second material tube 3, preventing the second material tube 3 from disengaging from the first material tube 2. The second material tube 3 includes a second main body 31, a second end portion 32, and a third end portion 33. The second end portion 32 is provided at one end of the second main body 31 close to the first end a, and the third end portion 33 is provided at one end of the second main body 31 close to the second end b. The first elastic connector 41 is sleeved on the first main body 21 and is provided between the first end portion 22 and the second end portion 32. A connection groove 331 is provided on the third end portion 33, and the connection groove 331 is configured to be connected to the first end 421 of the second elastic connector 42. The setting of the first material tube 2 plays a limiting and supporting role on the first elastic connector 41, providing a basis for the deformation of the first elastic connector 41 and preventing the second material tube 3 and the first elastic connector 41 from moving out of the first material tube 2. The connection groove 331 provided on the third end portion 33 provides a connection basis for the second elastic connector 42 and interacts with the second end 422 of the second elastic connector 42, providing a basis for the force deformation of the second elastic connector 42.

[0043] As long as one end of the installation of the first elastic connecting member 41 and the second elastic connecting member 42 is a fixed end and the other end is a movable end, deformation is generated according to the movement and force of the second material pipe 3, and the acting forces at both ends of the second material pipe 3 are buffered. For example, in some embodiments, the first end 411 of the first elastic connecting member 41 is fixedly connected to the first end portion 22, the first end 421 of the second elastic connecting member 42 is fixedly connected to the connecting groove 331, and the second end 422 of the second elastic connecting member 42 protrudes from the second end 36 of the second material pipe 3. The first end 411 and the second end 412 of the first elastic connecting member 41 are opposite ends of the first elastic connecting member 41, and the first end 411 is close to the first end a. The first end 421 and the second end 422 of the second elastic connecting member 42 are opposite ends of the second elastic connecting member 42, and the first end 421 is close to the first end a.

[0044] During use, when the second material pipe 3 moves along the direction close to the first end 23 of the first material pipe 2 and contacts the first elastic connecting member 41, the first elastic connecting member 41 is deformed by the force, and the acting force received by the second material pipe 3 is buffered. Further, the acting force received by the consumable is buffered, preventing the consumable from being broken due to excessive force, further enhancing the buffering effect of the consumable transmission, and at the same time avoiding structural damage caused by the direct impact of the second material pipe 3 and the first material pipe 2, improving the service life of the structural components and the stability of the overall structure of the consumable transmission buffer device; when the second material pipe 3 moves along the direction away from the first end 23 of the first material pipe 2, the second elastic connecting member 42 moves synchronously with the second material pipe 3. When the second elastic connecting member 42 contacts the inner wall of the second housing 12, the second elastic connecting member 42 is deformed by the force, and the acting force received by the second material pipe 3 is buffered. Further, the acting force received by the consumable is buffered, preventing the consumable from being broken due to excessive force, further enhancing the buffering effect of the consumable transmission, and at the same time avoiding structural damage caused by the direct impact of the second material pipe 3 and the inner walls of the housing 1 and the frame, improving the service life of the structural components and the stability of the overall structure of the consumable transmission buffer device.

[0045] In some other embodiments, the second end 412 of the first elastic connecting member 41 is fixedly connected to the second end portion 32, the second end 422 of the second elastic connecting member 42 is fixedly connected to the inner wall of the second housing 12, and the second elastic connecting member 42 is disposed opposite to the connecting groove 331. During use, the second material pipe 3 moves along the direction close to the first end 23 of the first material pipe 2. When the first elastic connecting member 41 contacts the first end portion 22, the first elastic connecting member 41 deforms under force, buffers the force applied to the second material pipe 3, and further buffers the force applied to the consumable, avoiding the consumable from being pulled and broken due to excessive force, further enhancing the buffering effect of the consumable transmission, and at the same time avoiding the structural damage caused by the direct impact between the second material pipe 3 and the first material pipe 2, improving the service life of the structural components and the stability of the overall structure of the consumable transmission buffer device. When the second material pipe 3 moves along the direction away from the first end 23 of the first material pipe 2, until the second elastic connecting member 42 is in alignment and contact with the connecting groove 331, the second elastic connecting member 42 deforms under force, buffers the force applied to the second material pipe 3, and further buffers the force applied to the consumable, avoiding the consumable from being pulled and broken due to excessive force, further enhancing the buffering effect of the consumable transmission, and at the same time avoiding the structural damage caused by the direct impact between the second material pipe 3 and the inner walls of the housing 1 and the frame body, improving the service life of the structural components and the stability of the overall structure of the consumable transmission buffer device.

[0046] An adjusting piece 34 is provided on the second material pipe 3, an adjusting hole 121 is formed in the second housing 12, and the adjusting piece 34 extends from the adjusting hole 121 of the second housing 12 to the outside of the second housing 12 along the second direction z. Optionally, in some other embodiments, the second housing 12 may also be a transparent housing. The transparent housing can directly observe the conveying state of the consumable. When the conveying of the consumable is abnormal and cannot be buffer-adjusted by the movement of the second material pipe 3, the adjusting piece 34 can be manually adjusted to adjust the abnormal conveying condition of the consumable.

[0047] Furthermore, a strengthening connection structure is provided in the connection corner area between the adjusting piece 34 and the second material pipe 3, and the strengthening connection structure improves the connection firmness between the second material pipe 3 and the adjusting piece 34.

[0048] Optionally, the adjusting piece 34 is disposed at the second end portion 32. By disposing the adjusting piece 34 at the second end portion 32, the distance between the second end portion 32 and the second end of the housing 1 is relatively far, which facilitates the setting of the adjusting hole 121, rationally utilizes the space of the housing 1, and reduces the overall volume of the housing 1.

[0049] See 5 andFigure 6 As shown, connecting plates 311 are provided on both sides of the second main body 31. A first support plate 111 is provided on the first housing 11. The connecting plates 311 extend along the third direction y until they abut against the first support plate 111. The first support plate 111 supports the connecting plates 311. During the movement of the second material pipe 3, the connecting plates 311 are lapped on the first support plate 111. The first support plate 111 plays a role in supporting and guiding the movement of the second material pipe 3, thereby improving the stability of the movement of the second material pipe 3.

[0050] See Figure 3 As shown, a second support plate 122 is provided in the area of the second housing 12 that is aligned with the first support plate 111. A channel 5 is formed between the second support plate 122 and the first support plate 111. A part of the connecting plates 311 extends into the channel 5, and the connecting plates 311 can move along the channel 5. The second support plate 122 and the first support plate 111 cooperate with each other to form the channel 5, further improving the stability of the movement of the connecting plates 311, and thus improving the stability of the movement of the connecting plates 311.

[0051] A protrusion 312 is provided on the surface of the second main body 31 facing the first housing 11. The consumable transmission buffer device further includes an induction detection member 6. The induction detection members 6 are respectively provided at two extreme positions of the movement of the protrusion 312. The induction detection member 6 is configured to detect whether the protrusion 312 moves to the extreme position. The induction detection member 6 senses and detects the movement position of the protrusion 312, and further detects the movement position of the second material pipe 3. When the second material pipe 3 moves to the extreme position, the induction detection member 6 feeds back a detection signal for subsequent adjustment, avoiding damage to the consumables caused by the second material pipe 3 being in the extreme position for a long time.

[0052] Both ends of the housing 1 are respectively provided with a first material inlet 13 and a second material inlet 14. The first material inlet 13 is connected to the first material pipe 2 through a first material conveying member 7, and the second material inlet 14 is connected to the second material pipe 3 through a second material conveying member 8. The number of the first material inlets 13 is at least 1. The first material conveying member 7 includes a plurality of consumable material transmission channels 71, and the number of the consumable material transmission channels 71 is equal to the number of the first material inlets 13. The consumable material transmission channels 71 extend from the first material inlet 13 and converge at the first end 23 of the first material pipe 2. The setting of the first material conveying member 7 enables the consumable material buffer device to transmit multiple types of consumables and then selectively transmit the consumables to the second material inlet 14. Optionally, the number of the first material inlets 13 and the consumable material transmission channels 71 is 4. During use, 4 different consumables conveyed by the upper-level consumable material transmission device are transmitted from the first material inlet 13 into the consumable material transmission channels 71, and then one of the consumables is transmitted into the first material pipe 2 through the first end 23 of the first material pipe 2, enters the second material pipe 3 through the first material pipe 2, and is finally transmitted to the lower-level consumable material transmission device through the second material inlet 14. During the consumable material transmission process, the second material pipe 3 moves relative to the first material pipe 2 according to the force received by the consumable material to buffer the force received by the consumable material, so as to enable the consumable material to be synchronously transmitted between different consumable material transmission devices. The second material conveying member 8 is made of Teflon material so that the second material conveying member 8 is in a transparent state for observing the transmission state of the consumable material. Among them, the Teflon material can be sourced from known suppliers in the art or prepared by known methods.

[0053] The present utility model further provides a 3D printer, which includes the consumable material buffer device as described above. During use, a first consumable material transmission device is arranged at the first end of the consumable material buffer device, and a second consumable material transmission device or a 3D printing head is arranged at the second end of the consumable material buffer device. During the consumable material transmission process, the consumable material buffer device buffers and adjusts the asynchronous transmission of the consumable material, and at the same time, the first elastic connecting member 41 and the second elastic connecting member 42 buffer the forces received at both ends of the second material pipe 3.

[0054] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0055] The above embodiments only represent the preferred embodiments of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A consumables transmission buffer device, characterized in that: include: A housing, comprising a first housing and a second housing covering the first housing; A first material pipe, fixedly disposed on the first shell along a first direction; a second material pipe, the second material pipe is connected to the first material pipe, and the second material pipe is movable relative to the first material pipe; The buffer assembly includes a first elastic connector and a second elastic connector, wherein the first elastic connector is arranged between the first end of the second material pipe and the first end of the first material pipe, and the second elastic connector is arranged between the second end of the second material pipe and the inner wall of the second shell.

2. The consumable material transmission buffer device according to claim 1, characterized in that: The first elastic connecting member and the second elastic connecting member are both compression springs.

3. The consumable material transmission buffer device according to claim 1, characterized in that: The second material pipe is sleeved on the first material pipe; the first material pipe includes a first main body and a first end, the first end is arranged at one end of the first main body close to the first end, and the outer contour size of the first end is larger than the outer contour size of the first main body; the second material pipe includes a second main body and a second end and a third end, the second end is arranged at one end of the second main body close to the first end, the third end is arranged at one end of the second main body close to the second end, the first elastic connecting piece is sleeved on the first main body and arranged between the first end and the second end; the third end is provided with a connecting groove, and the connecting groove is configured to be connected to the first end of the second elastic connecting piece.

4. The consumable material transmission buffer device according to claim 3, characterized in that: The first end of the first elastic connecting member is fixedly connected to the first end portion, the first end of the second elastic connecting member is fixedly connected to the connecting groove, and the second end of the second elastic connecting member is protruding from the second end of the second material tube.

5. The consumable material transmission buffer device according to claim 4, characterized in that: The second end of the first elastic connecting member is fixedly connected to the second end portion, the second end of the second elastic connecting member is fixedly connected to the inner wall of the second shell, and the second elastic connecting member is aligned with the connecting groove.

6. The consumable material transmission buffer device according to claim 1, characterized in that: The second material pipe is provided with an adjustment sheet, the second shell is provided with an adjustment hole, and the adjustment sheet extends from the adjustment hole of the second shell to the outside of the second shell along the second direction.

7. The consumable material transmission buffer device according to claim 3, characterized in that: Connecting plates are disposed on both sides of the second main body, a first supporting plate is disposed on the first shell, and the connecting plates extend along the third direction until they abut against the first supporting plate.

8. The consumable material transmission buffer device according to claim 7, characterized in that: A second support plate is provided in an area where the second shell is aligned with the first support plate. A groove is formed between the second support plate and the first support plate, and the connecting plate portion extends into the groove.

9. The consumable material transmission buffer device according to claim 3, characterized in that: A protrusion is provided on one side of the second main body facing the first shell, and the consumable material transmission buffer device also includes an inductive detection component, which is respectively arranged at two extreme positions of the movement of the protrusion, and the inductive detection component is configured to detect whether the protrusion moves to the extreme position.

10. The consumable material transmission buffer device according to claim 1, characterized in that: The shell is provided with a first material port and a second material port at both ends respectively, the first material port is connected to the first material pipe through a first material feeding piece, and the second material port is connected to the second material pipe through a second material feeding piece; the number of the first material ports is at least 1, the first material feeding piece includes a plurality of consumable material transmission channels, and the number of the consumable material transmission channels is equal to the number of the first material ports.

11. A 3D printer, characterized in that: It comprises a consumable material transmission buffer device as described in any one of claims 1-10.

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