3D printer feeding device and 3D printer

Abstract

The utility model discloses a 3D printer feeding device and 3D printers, the 3D printer feeding device comprises a feeding device, a guide pipe and a guide connecting assembly, the guide connecting assembly is connected with the feeding device, the working state of the guide connecting assembly comprises a first working condition and a second working condition, the guide connecting assembly in the first working condition abuts against the guide pipe to clamp the guide pipe, and the guide connecting assembly in the second working condition is separated from the guide pipe to release the guide pipe. According to the feeding device, the guide pipe is clamped and released through the guide connecting assembly, the guide pipe is prevented from falling off from the feeding device, the stability of the guide pipe is greatly improved, and the feeding device is convenient to assemble and disassemble and saves more labor.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printers, and particularly relates to a feeding device for a 3D printer and a 3D printer. Background Art

[0002] As a machine of rapid prototyping technology, a 3D printer can use a linear consumable. Before printing, a guide tube can be set to guide the linear consumable, and the linear consumable is conveyed to the print head of the 3D printer through the guide tube. However, usually, the guide tube is fixed by inserting it into the tube slot of the feeding device. However, this method has poor stability, is easy to fall off, and is inconvenient to install and disassemble, and is rather laborious. Summary of the Utility Model

[0003] In order to overcome at least one of the above disadvantages, the utility model provides a feeding device for a 3D printer and a 3D printer. The object of the utility model can be achieved by adopting the following technical solutions:

[0004] In the first aspect of the utility model, a feeding device for a 3D printer is provided, which includes a feeding device, a guide tube and a guiding connection component. The guiding connection component is connected to the feeding device. The working state of the guiding connection component includes a first working condition and a second working condition. In the first working condition, the guiding connection component abuts against the guide tube to clamp the guide tube, and in the second working condition, the guiding connection component is separated from the guide tube to release the guide tube.

[0005] In an implementable manner, the guiding connection component includes:

[0006] A connecting head, one end of which is movably connected to the guide tube;

[0007] A connecting seat, one end of which is movably connected to the connecting head, and the other end is connected to the feeding device.

[0008] In an implementable manner, the working position of the connecting head includes a first position for clamping the guide tube and a second position for releasing the guide tube. The guiding connection component further includes an elastic member, and the elastic member is used to apply an elastic force to the connecting head to make the connecting head in the first position.

[0009] In an implementable manner, the guiding connection component further includes a constraint member, the constraint member is placed between the connecting head and the elastic member and is in contact with the connecting head, and the elastic member is sleeved on the constraint member so that the constraint member limits the deformation direction of the elastic member.

[0010] In an implementable manner, the constraint member includes:

[0011] A restraining tube, with the elastic member sleeved on the outer peripheral side of the restraining tube;

[0012] An abutting portion, which is arranged at one end of the restraining tube and protrudes outward. During the switching process of the connecting head between the first position and the second position, the abutting portion abuts against the connecting head to push the connecting head to move.

[0013] In an implementable embodiment, the restraining member further includes a connecting member, which is arranged on the restraining tube and / or the abutting portion and is used to restrain the first end of the elastic member.

[0014] In an implementable embodiment, the connecting seat is provided with a buckle, and the feeding device is provided with a clamping groove corresponding to the buckle.

[0015] In an implementable embodiment, when the connecting head moves from the second position to the first position, a partial area of the connecting head approaches the guiding tube, and when the connecting head reaches the first position, it clamps the guiding tube;

[0016] When the connecting head moves from the first position to the second position, a partial area of the connecting head moves away from the guiding tube, and when the connecting head reaches the second position, it releases the guiding tube.

[0017] In an implementable embodiment, the connecting head includes:

[0018] An annular member, on which a second through hole for accommodating the guiding tube is formed;

[0019] A clamping portion, which includes at least two clamping teeth circumferentially arranged on the annular member. One end of the clamping tooth is relatively fixed to the annular member, and the other end of the clamping tooth is a free end;

[0020] A limiting member, which is arranged at the end of the clamping tooth far from the annular member and protrudes outward;

[0021] Wherein, the cavity defined by the plurality of clamping teeth is a clamping cavity, and the clamping teeth are elastic, so that the free ends of the clamping teeth move closer to or away from the guiding tube to adjust the inner diameter of one end of the clamping cavity and clamp or release the guiding tube.

[0022] In an implementable embodiment, the connecting head further includes a convex portion, which is arranged on the inner wall of the clamping tooth and extends towards the clamping cavity. One end of the convex portion is connected to the clamping tooth, and the other end extends in a direction away from the annular member. The convex portion has a certain elasticity.

[0023] In an implementable embodiment, the connecting seat is provided with a first through hole for the connecting head to pass through.

[0024] In an implementable manner, the outer diameter of the connection end of the clamping part and the annular part is smaller than the outer diameter of the connection end of the clamping part and the limiting part, the outer diameter of the connection end of the clamping part and the annular part is smaller than the outer diameter of the annular part, and the outer diameter of the connection end of the clamping part and the limiting part is smaller than the outer diameter of the limiting part;

[0025] The inner diameter of the first through hole is larger than the outer diameter of the connection end of the clamping part and the annular part and smaller than the outer diameter of the annular part.

[0026] In an implementable manner, the first end of the elastic part abuts against the connection head through the restraint part, and the second end of the elastic part is relatively fixed in position with respect to the connection seat.

[0027] In an implementable manner, the elastic part is at least one of a tension spring, a compression spring, and an elastic sheet.

[0028] In an implementable manner, the guiding connection assembly further includes:

[0029] A groove is formed in the feeding device and is arranged corresponding to the elastic part, and at least a part of the elastic part is located inside the groove.

[0030] In an implementable manner, at least a part of the restraint part is located inside the groove.

[0031] In an implementable manner, during the process of the connection head switching between the first position and the second position, the connection seat abuts against the outer wall of the clamping teeth, so that the clamping teeth are deformed to clamp or release the guiding tube;

[0032] Wherein, the inner diameter of the first through hole near the annular part is larger than the inner diameter of the first through hole near the limiting part, so as to be arranged corresponding to the outer wall of the clamping part.

[0033] In an implementable manner, when the connection head is in the first position, the connection seat abuts against the limiting part; when the connection head is in the second position, the connection seat abuts against the annular part.

[0034] In an implementable manner, the 3D printer feeding device further includes a discharge channel, the feeding device includes a material passing channel, one end of the material passing channel is provided with a feeding port, and the other end is provided with a discharge port. The feeding port is used for the printing wire to enter, and the discharge port converges towards the discharge channel and is communicated with the discharge channel to turn the printing wire in the material passing channel to the discharge channel.

[0035] In one possible implementation, the number of the material passing channels is one, and the feed inlet of the material passing channel is communicated with the guiding pipe.

[0036] For the 3D printer feeding device according to the claim, the feeding device includes a first feeding mechanism, and a material passing channel is formed inside the first feeding mechanism, and the inner diameter of the feed inlet of the material passing channel is larger than the inner diameter of the discharge outlet of the material passing channel.

[0037] In one possible implementation, the number of the material passing channels is at least two.

[0038] In one possible implementation, the feeding device includes:

[0039] A first feeding mechanism, the first feeding mechanism includes a first half shell;

[0040] A second feeding mechanism, the second feeding mechanism includes a second half shell;

[0041] Wherein, the material passing channel includes a cavity defined by the first half shell and the second half shell.

[0042] In one possible implementation, the second feeding mechanism includes a second feeding main body and a shell, the second feeding main body includes the second half shell, and the shell is used for accommodating the first feeding mechanism and the second feeding main body;

[0043] Wherein, the first feeding mechanism is movably connected to the second feeding main body,

[0044] The second feeding main body is movably connected to the shell; or, the second feeding main body is fixedly connected to the shell.

[0045] In one possible implementation, the material passing channel includes:

[0046] A straight section, one end of the straight section starts from the feed inlet;

[0047] An arc section, one end of the arc section is connected to the straight section, and the other end ends at the discharge outlet.

[0048] In one possible implementation, the straight section is enclosed by a partial area of the first half shell, and the arc section is enclosed by a partial area of the first half shell and the second half shell.

[0049] In one possible implementation, the straight section is closed in the circumferential direction, and the arc section enclosed by the first half shell and the second half shell is closed in the circumferential direction.

[0050] In one possible implementation, a part of the first half shell that is used to enclose the linear section is disposed inside the first feeding mechanism, and a part of the first half shell that is used to cooperate with the second half shell to enclose the arc section is exposed. The second half shell is disposed on the inner wall of the second feeding mechanism.

[0051] In one possible implementation, the linear section is enclosed by a partial area of the first half shell and a partial area of the second half shell, and the arc section is enclosed by a partial area of the first half shell and a partial area of the second half shell.

[0052] In one possible implementation, the linear section enclosed by the first half shell and the second half shell is closed in the circumferential direction, and the arc section enclosed by the first half shell and the second half shell is closed in the circumferential direction.

[0053] In one possible implementation, the first half shell is disposed on the outer wall of the first feeding mechanism, and the second half shell is disposed on the inner wall of the second feeding mechanism.

[0054] In one possible implementation, the guiding tube includes a wire channel, and the wire channels are arranged in one-to-one correspondence with the material passing channels;

[0055] The guiding connection assembly is connected to the first feeding mechanism and / or the second feeding mechanism.

[0056] In one possible implementation, the 3D printer feeding device further includes:

[0057] A pipe groove is opened on the first feeding mechanism and is arranged corresponding to the guiding tube for connecting to one end of the guiding tube.

[0058] In a second aspect of the present invention, there is provided a 3D printer including the 3D printer feeding device according to any one of the above.

[0059] Advantageous technical effects of the present invention: According to the present disclosure, the 3D printer feeding device and the 3D printer provided by the present invention. The 3D printer feeding device clamps and releases the guiding tube through the guiding connection assembly, preventing the guiding tube from falling off the feeding device, greatly improving the stability of the guiding tube, and being more labor-saving and convenient for installation and disassembly.

[0060] The above description is only an overview of the technical solution of this application. In order to be able to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of this application more obvious and understandable, the following specifically gives the specific implementation manners of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The accompanying drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0062] Figure 1 A schematic connection structure diagram of the feeding device of a 3D printer and the structure of the 3D printer is shown;

[0063] Figure 2 A schematic exploded perspective view of the feeding device of a 3D printer is shown;

[0064] Figure 3 A schematic structure diagram of the restraint and elastic members of the feeding device of a 3D printer is shown;

[0065] Figure 4 A schematic overall structure diagram of the feeding device of a 3D printer is shown;

[0066] Figure 5 A front sectional view of the feeding device of a 3D printer is shown;

[0067] Figure 6 A front sectional view of the straight section and the arc section is shown;

[0068] Figure 7 A schematic structure diagram of the first feeding mechanism at an angle is shown;

[0069] Figure 8 A schematic structure diagram of the first feeding mechanism at another angle is shown;

[0070] Figure 9 A sectional view of the structure of the first feeding mechanism is shown;

[0071] Figure 10 A front sectional view of the first feeding mechanism is shown;

[0072] Figure 11 A schematic structure diagram of the second feeding mechanism at an angle is shown;

[0073] Figure 12 A sectional view of the structure of the second feeding mechanism is shown;

[0074] Figure 13 A schematic structure diagram of the connecting seat is shown;

[0075] Figure 14 A schematic structure diagram of the housing is shown;

[0076] Figure 15 A perspective structure diagram of the connector is shown;

[0077] Figure 16The structural front view of the connector is shown;

[0078] Figure 17 The front sectional view of the connector and the socket in the first position of the connector is shown;

[0079] Figure 18 The front sectional view of the connector and the socket in the second position of the connector is shown;

[0080] Figure 19 The front sectional view of the feeding device of the 3D printer is shown.

[0081] In the figure: 100, the feeding device of the 3D printer; 200, the 3D printer; 1, the first feeding mechanism; 2, the second feeding mechanism; 3, the guiding connection assembly; 4, the guiding tube; 5, the housing; 7, the discharging channel; 8, the material passing channel; 31, the connector; 32, the socket; 33, the elastic member; 34, the groove; 35, the restraint member; 41, the tube groove; 311, the ring-shaped member; 312, the clamping portion; 313, the limiting member; 3121, the clamping teeth; 3122, the convex portion; 321, the first through hole; 322, the buckle; 323, the clamping groove; 351, the restraint tube; 352, the abutting portion; 353, the connecting member; 81, the first half housing; 82, the second half housing; 91, the straight section; 92, the arc section. Detailed implementation manners

[0082] In the following detailed disclosure, with reference to the accompanying drawings, these embodiments are fully described. To make the technical solutions of the present invention clearer and more definite for those skilled in the art, the described implementation manners are not limited thereto. The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings.

[0083] In the first aspect of the present invention, as Figures 2 - 5 shown, a feeding device 100 of a 3D printer is provided, which can be applied to a 3D printer 200 as Figure 1 shown. The feeding device 100 of the 3D printer in this embodiment includes a feeding device, a guiding tube 4, and a guiding connection assembly 3. The guiding connection assembly 3 is connected to the feeding device. The working states of the guiding connection assembly 3 include a first working condition and a second working condition. The guiding connection assembly 3 in the first working condition abuts against and clamps the guiding tube 4, and the guiding connection assembly 3 in the second working condition is separated from the guiding tube 4 to release the guiding tube 4.

[0084] The feeding device of the 3D printer clamps and releases the guiding tube 4 through the guiding connection assembly 3, preventing the guiding tube 4 from falling off the feeding device, greatly improving the stability of the guiding tube 4, and making the installation and disassembly more convenient and labor-saving.

[0085] In an implementable manner, as Figure 2 andFigure 4 As shown, the guiding connection component 3 includes a connection head 31 and a connection base 32. One end of the connection head 31 is movably connected to the guiding tube 4, one end of the connection base 32 is movably connected to the connection head 31, and the other end is connected to the feeding device.

[0086] It can be understood that the guiding tube 4 is detachably connected to the connection head 31. The guiding tube 4 is ultimately connected to the feeding device through the connection head 31. One end of the connection base 32 is movably connected to the connection head 31, and the other end is connected to the feeding device.

[0087] In an implementable manner, as Figure 17 and Figure 18 shown, the working positions of the connection head 31 include a first position for clamping the guiding tube 4 and a second position for releasing the guiding tube 4. The guiding connection component 3 further includes an elastic member 33, and the elastic member 33 is used to apply an elastic force to the connection head 31 to make the connection head 31 in the first position.

[0088] It can be understood that when the guiding connection component 3 is in the first working condition, the connection head 31 is located at the first position to clamp the guiding tube 4; when the guiding connection component 3 is in the second working condition, the connection head 31 is located at the second position to release the guiding tube 4.

[0089] In an implementable manner, as Figure 2 、 Figure 3 、 Figure 5 and Figure 19 shown, the guiding connection component 3 further includes a constraint member 35. The constraint member 35 is placed between the connection head 31 and the elastic member 33 and is in contact with the connection head 31. The elastic member 33 is sleeved on the constraint member 35 so that the constraint member 35 limits the deformation direction of the elastic member 33.

[0090] The feeding device 100 of this 3D printer limits the deformation direction of the elastic member 33 by setting the constraint member 35. The deformation direction and deformation range of the elastic member 33 are constrained. The elastic member 33 abuts against or is fixedly connected to the connection head 31 through the constraint member 35, increasing the contact area, avoiding relative sliding between the elastic member 33 and the connection head 31 directly contacting, greatly improving the stability of driving the connection head 31 to move its position by the elastic member 33, further reducing the wear degree of the elastic member 33 and the connection head 31, improving the service life of the parts, and reducing the failure rate.

[0091] It can be understood that a part of the restraint member 35 is located between the connector head 31 and the elastic member 33 to increase the contact area with the connector head 31, and convert the elastic force exerted by the elastic member 33 on the connector head 31 into a thrust force exerted by the restraint member 35 on the connector head 31. During the switching process of the connector head 31 between the first position and the second position, the connector head 31 is always in contact with the restraint member 35, and the restraint member 35 can move with the connector head 31, greatly improving the stability of the connector head 31 during the switching process between the first position and the second position.

[0092] It can be understood that a part of the restraint member 35 is located inside the elastic member 33 to limit the deformation direction of the elastic member 33, so that the elastic member 33 deforms along the axial direction of the restraint member 35, preventing the elastic member 33 from bending or shifting to one side.

[0093] In an implementable embodiment, as Figure 2 、 Figure 3 and Figure 5 shown, the restraint member 35 includes a restraint tube 351 and an abutting portion 352. The elastic member 33 is sleeved on the outer peripheral side of the restraint tube 351. The abutting portion 352 is provided at one end of the restraint tube 351 and protrudes outward. During the switching process of the connector head 31 between the first position and the second position, the abutting portion 352 abuts against the connector head 31 to push the connector head 31 to move.

[0094] It can be understood that in this embodiment, the restraint tube 351 is taken as an example of a tubular member with openings at both ends and a hollow interior. The inner diameter of the restraint tube 351 is slightly larger than the outer diameter of the guide tube 4, and the outer diameter of the restraint tube 351 is slightly smaller than the inner diameter of the elastic member 33, so that the side wall of the restraint tube 351 forms a limit for the elastic member 33, causing the elastic member 33 to deform along the axial direction of the restraint tube 351, preventing the elastic member 33 from bending or shifting to one side. A flange, that is, the abutting portion 352, is provided at one end of the outer wall of the restraint tube 351 close to the connector head 31. The elastic member 33 is located within the edge projection area of the abutting portion 352. The abutting portion 352 is placed between the elastic member 33 and the connector head 31, and it is ensured that the contact area between the connector head 31 and the abutting portion 352 is larger than the contact area between the connector head 31 and the elastic member 33, further improving the uniformity of the force on the connector head 31, thereby improving the stability of the connector head 31 during the moving process. The abutting portion 352 abuts against the connector head 31, and by abutting against the connector head 31 with the abutting portion 352, the stability between the elastic member 33 and the connector head 31 is improved.

[0095] In an implementable embodiment, as Figure 3 shown, the restraint member 35 further includes a connecting member 353. The connecting member 353 is provided on the restraint tube 351 and / or the abutting portion 352 for restraining the first end of the elastic member 33.

[0096] It can be understood that the end of the elastic member 33 can be connected to the restraint member 35 by setting a connecting member 353, and the end of the elastic member 33 is fixed on the abutting portion 352, so as to improve the stability between the elastic member 33 and the restraint member 35.

[0097] Among them, the connecting member 353 can be a collar, a bolt, a clamping member, an adhesive, etc.

[0098] In an implementable manner provided by the present utility model, the feeding device includes a first feeding mechanism 1 and a second feeding mechanism 2, and the first feeding mechanism 1 and the second feeding mechanism 2 are used in combination.

[0099] In an implementable manner, as Figure 13 shown, a first through hole 321 for the connecting head 31 to pass through is formed on the connecting seat 32.

[0100] During specific implementation, the guiding tube 4 is connected to the connecting seat 32 through the connecting head 31, and the connecting seat 32 is connected to the first feeding mechanism 1 and / or the second feeding mechanism 2. When the second feeding mechanism 2 includes a second feeding main body and a housing 5, the connecting seat 32 can be connected to the housing 5. It can be understood that the first through hole 321 on the connecting seat 32 is arranged in one-to-one correspondence with the guiding tube 4, and the guiding tube 4 passes through the first through hole 321 and one end thereof is inserted into the tube slot 41, which can improve the stability of the position of the guiding tube 4.

[0101] Among them, as Figure 13 and Figure 14 shown, a buckle 322 is provided on the connecting seat 32, and a clamping groove 323 corresponding to the buckle 322 is provided on the second feeding mechanism 2. A buckle 322 protruding outward is provided on the connecting seat 32, and a clamping groove 323 arranged in one-to-one correspondence with the buckle 322 is formed on the second feeding mechanism 2. When the connecting seat 32 is connected to the second feeding mechanism 2, the buckle 322 is inserted into the clamping groove 323 to realize the relative fixation of the positions of the connecting seat 32 and the second feeding mechanism 2. It can be understood that when the second feeding mechanism 2 includes a second feeding main body and a housing 5, as Figure 14 shown, the clamping groove 323 is formed on the housing 5.

[0102] Furthermore, as Figure 17 and Figure 18 shown, the working positions of the connecting head 31 include a first position and a second position; when the connecting head 31 moves from the second position to the first position, a partial area of the connecting head 31 approaches the guiding tube 4, and when the connecting head 31 reaches the first position, the guiding tube 4 is clamped; when the connecting head 31 moves from the first position to the second position, a partial area of the connecting head 31 moves away from the guiding tube 4, and when the connecting head 31 reaches the second position, the guiding tube 4 is released.

[0103] It is understandable that by clamping the guiding tube 4 with the connector head 31, the guiding tube 4 is clamped or released during the switching of the connector head 31 between the first position and the second position.

[0104] Furthermore, as Figure 15 and Figure 16 shown, the connector head 31 includes an annular member 311, a clamping portion 312 and a limiting member 313. A second through hole for accommodating the guiding tube 4 is formed in the annular member 311. The clamping portion 312 includes at least two clamping teeth 3121 circumferentially arranged on the annular member 311. One end of the clamping tooth 3121 is relatively fixed to the annular member 311, and the other end of the clamping tooth 3121 is a free end. The limiting member 313 is arranged at the end of the clamping tooth 3121 away from the annular member 311 and protrudes outward.

[0105] Among them, the guiding tube 4 passes through the connector head 31. The guiding tube 4 passes through the second through hole in the annular member 311. The clamping portion 312 is sleeved on the guiding tube 4, and at least two clamping teeth 3121 are circumferentially arranged along the guiding tube 4. When the connector head 31 clamps the guiding tube 4, the clamping teeth 3121 are in contact with the outer wall of the guiding tube 4. It is understandable that the number of the clamping teeth 3121 is at least two, and at least two clamping teeth 3121 are correspondingly arranged for clamping the guiding tube 4. During the process of the connector head 31 clamping or releasing the guiding tube 4, the clamping teeth 3121 are deformed, and the free ends of the clamping teeth 3121 move in a direction close to or away from the guiding tube 4.

[0106] Among them, the cavity defined by the plurality of clamping teeth 3121 is a clamping cavity. The clamping teeth 3121 have elasticity, so that the free ends of the clamping teeth 3121 move close to or away from the guiding tube 4 to adjust the inner diameter of one end of the clamping cavity, and clamp or release the guiding tube 4. In specific implementation, the clamping teeth 3121 can be made of materials such as plastic, rubber and metal, and can be metal materials with a certain hardness and elasticity, such as metals or alloys such as iron, steel, and copper.

[0107] Furthermore, as Figure 17 and Figure 18 shown, the connector head 31 further includes a convex portion 3122. The convex portion 3122 is arranged on the inner wall of the clamping tooth 3121 and extends towards the clamping cavity. One end of the convex portion 3122 is connected to the clamping tooth 3121, and the other end extends in a direction away from the annular member 311. The convex portion 3122 has a certain elasticity.

[0108] The convex portion 3122 protrudes towards the inside of the clamping cavity. The convex portion 3122 has a certain elasticity, so that when the connector head 31 is in the first position, the convex portion 3122 remains in a deformed state and applies a force to the guiding tube 4 to improve the clamping stability.

[0109] Among them, the convex portion 3122 can be an elastic sheet, a rubber gasket, or other elastic components, which can provide an elastic force to keep the connector 31 in the first position state. It is only necessary to apply a force to the guide tube 4, which can increase the friction force between the guide tube 4 and the connector 31 when the guide tube 4 is clamped.

[0110] Further, one end of the convex portion 3122 is connected to the inner wall of the clamping tooth 3121, and the other end of the convex portion 3122 is inserted into the clamping cavity and inclined toward the direction close to the limiting member 313, so that the constraint member applies an elastic force to the guide tube 4, which can improve the clamping stability, does not affect the insertion of the guide tube 4 into the clamping cavity, and forms a certain resistance to the guide tube 4 moving in the reverse direction when being withdrawn from the clamping cavity. When the clamping tooth 3121 releases the guide tube 4, the guide tube is not easily dropped from the connector 31.

[0111] Among them, in this embodiment, the connection between the connector 31 and the connection base 32 is taken as an example of pluggable connection. As Figure 2 shown, the connector 31 is inserted into the first through hole 321 of the connection base 32, and the elastic member 33 is used to keep the connector 31 in the first position. Specifically, when implementing, the switching from the first position to the second position is realized by pressing the connector 31.

[0112] Among them, in this embodiment, the connection between the connector 31 and the guide tube 4 is taken as an example of clamping connection. As Figure 4 shown, the guide tube 4 is inserted into the connector 31, and the guide tube 4 is clamped by the clamping portion 312. Specifically, when implementing, the switching of the connector 31 from the first position to the second position is realized by pressing the connector 31, and then the connection and separation between the connector 31 and the guide tube 4 are realized.

[0113] In some possible embodiments provided by the present disclosure, the connection between the connector 31 and the guide tube 4 is a snap-fit connection; the connector 31 is provided with a protrusion / groove, and the corresponding protrusion / groove of the guide tube 4, and the connection and separation between the connector 31 and the guide tube 4 are realized through the snap-fit between the protrusion and the groove.

[0114] Among them, as Figure 15 and Figure 16 shown, the outer diameter of the connection end of the clamping portion 312 and the annular member 311 is smaller than the outer diameter of the connection end of the clamping portion 312 and the limiting member 313, the outer diameter of the connection end of the clamping portion 312 and the annular member 311 is smaller than the outer diameter of the annular member 311, and the outer diameter of the connection end of the clamping portion 312 and the limiting member 313 is smaller than the outer diameter of the limiting member 313; as Figure 5 、 Figure 17 and Figure 18 shown, the inner diameter of the first through hole 321 is larger than the outer diameter of the connection end of the clamping portion 312 and the annular member 311, and smaller than the outer diameter of the annular member 311.

[0115] It can be understood that the annular member 311 protrudes outward relative to the clamping portion 312 connected thereto, and the limiting member 313 protrudes outward relative to the clamping portion 312 connected thereto. The annular member 311 and the limiting member 313 respectively form stoppers for the connecting seat 32 at both ends of the clamping portion 312. The inner diameter of the connecting seat 32 is larger than the outer diameter of the connecting end of the clamping portion 312 and the annular member 311. When the connecting head 31 is in a state without external force extrusion, the inner diameter of the connecting seat 32 is smaller than the outer diameter of the connecting end of the clamping portion 312 and the limiting member 313. When the connecting head 31 is in a state of being extruded by the connecting seat 32, the free end of the clamping tooth 3121 moves towards the guiding tube 4 until it abuts against the guiding tube 4. At this time, the inner diameter of the connecting seat 32 is larger than the outer diameter of the clamping portion 312, and the inner diameter of the connecting seat 32 is smaller than the outer diameter of the limiting member 313.

[0116] As Figure 17 and Figure 18 shown, during the process of the connecting head 31 switching between the first position and the second position, the connecting seat 32 abuts against the outer wall of the clamping tooth 3121, so that the clamping tooth 3121 deforms to clamp or release the guiding tube 4.

[0117] During specific implementation, the inner diameter of the first through hole 321 near the annular member 311 is larger than the inner diameter of the first through hole 321 near the limiting member 313, so as to be correspondingly arranged with the outer wall of the clamping portion 312. It can be understood that the cross-sectional shape of the first through hole 321 is trapezoidal, which is adapted to the outer wall shape of the clamping portion 312 of the connecting head 31.

[0118] In an implementable manner provided by the present utility model, as Figure 5 shown, the first end of the elastic member 33 abuts against the connecting head 31 through the constraint member 35, and the second end of the elastic member 33 is relatively fixed with respect to the connecting seat 32.

[0119] It can be understood that by setting the elastic member 33, it drives the connecting head 31 to switch from the second position to the first position, and applies a thrust to the connecting head 31 through the constraint member 35 to make the connecting head 31 in the first position, so that the connecting head 31 moves to an operating position that satisfies the clamping of the guiding tube 4.

[0120] Among them, the elastic member 33 is located outside the wire feeding trajectory, that is, it can be arranged outside the guiding tube 4 or sleeved on the guiding tube 4. The first end of the elastic member 33 abuts against the connecting head 31 through the restraint member 35, and the second end of the elastic member 33 is connected / abutted to the first feeding mechanism 1 or the second feeding mechanism 2. The position of the second end of the elastic member 33 is relatively fixed with respect to the connecting seat 32. The elastic member 33 applies a thrust to the connecting head 31 through the restraint member 35 so that the limiting member 313 of the connecting head 31 abuts against the connecting seat 32, and the clamping teeth 3121 are deformed inward under the extrusion of the first through hole 321 and abut against the outer wall of the guiding tube 4 to clamp the guiding tube 4. Therefore, under the action of the elastic member 3, the connecting head 31 is held at the first position to clamp the guiding tube 4.

[0121] Among them, when the connecting head 31 is in the first position or the second position, the elastic member 33 can remain in a deformed state and maintain the acting force applied to the connecting head 31.

[0122] Among them, in this embodiment, the elastic member 33 is taken as a compression spring as an example. The first end of the elastic member 33 abuts against or is fixedly connected to the restraint member 35, the restraint member 35 abuts against or is fixedly connected to the connecting head 31, and the other end of the elastic member 33 abuts against or is fixedly connected to the first feeding mechanism 1, that is, the position of the other end of the elastic member 33 is guaranteed to be relatively stationary with respect to the connecting seat 32. As Figure 7 , Figure 9 and Figure 10 shown, the guiding connection assembly 3 further includes a groove 34, which is opened on the first feeding mechanism 1 and is correspondingly arranged with the elastic member 33. At least a part of the elastic member 33 is located inside the groove 34. It can be understood that the groove 34 is opened at the feeding port position of the material passing channel 8 of the first feeding mechanism 1 for accommodating the elastic member 33 to improve the stability of the elastic member 33.

[0123] Among them, the pipe groove 41 for connecting the guiding tube 4 is opened at the feeding port position. If the elastic member 33 is sleeved on the guiding tube 4, the inner diameter of the groove 34 is larger than the inner diameter of the pipe groove 41. In view of this, the groove 34 can be arranged on one side of the pipe groove 41 close to the connecting seat 32, and the groove 34, the pipe groove 41 and the feeding port of the material passing channel 8 can be coaxially arranged.

[0124] In an embodiment provided by the present utility model, the elastic member 33 is at least one of a tension spring, a compression spring and an elastic sheet.

[0125] In some possible embodiments provided by the present disclosure, the elastic member 33 is a tension spring. The first end of the tension spring abuts against or is fixedly connected to the restraint member 35. The restraint member 35 abuts against or is fixedly connected to the connection head 31. The second end of the tension spring is relatively fixed in position with respect to the connection seat 32, that is, the second end of the tension spring is connected to the connection seat 32. The restraint member 35 is located outside the guide tube 4 or sleeved on the outer peripheral side of the guide tube 4. The tension spring is sleeved on the restraint member 35 and can stably provide elastic force, enabling the connection head 31 to switch from the second position to the first position and remain in the first position.

[0126] In some possible embodiments provided by the present disclosure, the elastic member 33 is a compression spring. The first end of the compression spring abuts against or is fixedly connected to the restraint member 35. The restraint member 35 abuts against or is fixedly connected to the connection head 31. The second end of the compression spring is relatively fixed in position with respect to the connection seat 32, that is, the second end of the compression spring is connected to the first feeding mechanism 1. The restraint member 35 is located outside the guide tube 4 or sleeved on the outer peripheral side of the guide tube 4. The compression spring is sleeved on the restraint member 35 and can stably provide elastic force, enabling the connection head 31 to switch from the second position to the first position and remain in the first position.

[0127] In some possible embodiments provided by the present disclosure, the elastic member 33 is an elastic sheet. The first end of the elastic sheet abuts against or is fixedly connected to the restraint member 35. The restraint member 35 abuts against or is fixedly connected to the connection head 31. The second end of the elastic sheet is relatively fixed with respect to the connection seat 32, that is, the second end of the elastic sheet is connected to the first feeding mechanism 1 or the connection seat 32. The restraint member 35 is located outside the guide tube 4 or sleeved on the outer peripheral side of the guide tube 4. The elastic sheet is located on the outer peripheral side of the restraint member 35 and can bend outward under the restraint of the restraint member 35, and can stably provide elastic force, enabling the connection head 31 to switch from the second position to the first position and remain in the first position.

[0128] It can be understood that the elastic member 33 can also be an elastic component other than a tension spring, a compression spring, and an elastic sheet, as long as it can provide an elastic force to enable the connection head 31 to switch from the second position to the first position.

[0129] In an implementable manner, the guiding and connecting assembly 3 further includes a groove 34. The groove 34 is opened on the feeding device and is correspondingly arranged with the elastic member 33. At least a part of the elastic member 33 is located inside the groove 34.

[0130] Among them, as Figure 5 shown, at least a part of the restraint member 35 is located inside the groove 34. During specific installation, the restraint member 35 can be located in the groove 34 and can move along the axial direction of the groove 34. The elastic member 33 is sleeved on the restraint member 35, and the restraint member 35 and the groove 34 limit the deformation direction of the elastic member 33.

[0131] In an implementable manner, during the process of the connector head 31 switching between the first position and the second position, the connector base 32 abuts against the outer wall of the clamping teeth 3121, so that the clamping teeth 3121 are deformed to clamp or release the guiding tube 4; the inner diameter of the first through hole 321 near one end of the annular member 311 is larger than the inner diameter of the first through hole 321 near one end of the limiting member 313, so as to be correspondingly arranged with the outer wall of the clamping portion 312.

[0132] Among them, as Figure 17 and Figure 18 shown, when the connector head 31 is in the first position, the connector base 32 abuts against the limiting member 313. During the process of the connector head 31 switching from the second position to the first position, the connector head 31 moves along the inner wall of the first through hole 321 in a direction away from the first feeding mechanism 1, and the connector base 32 gradually increases the pressure applied to the clamping portion 312 in the first through hole 321. The inner diameter of one end of the clamping cavity defined in the clamping portion 312 decreases until the clamping teeth 3121 abut against the guiding tube 4 to clamp the guiding tube 4.

[0133] Among them, as Figure 17 and Figure 18 shown, when the connector head 31 is in the second position, the connector base 32 abuts against the annular member 311. During the process of the connector head 31 switching from the first position to the second position, the connector head 31 moves along the inner wall of the first through hole 321 in a direction close to the first feeding mechanism 1, and the connector base 32 gradually reduces the pressure applied to the clamping portion 312 in the first through hole 321. The inner diameter of one end of the clamping cavity defined in the clamping portion 312 increases until the clamping teeth 3121 are separated from the guiding tube 4 to release the guiding tube 4.

[0134] In the related art, for the 3D printer, since the wire is only conveyed through one feeding port, the wire conveying efficiency is low and the color is single. For example, when the previous wire is exhausted, it is necessary to pause printing and replace the wire. When printing in multiple colors is required, it is also necessary to pause printing and replace the wire, which will affect the printing efficiency and printing quality.

[0135] As Figures 2 - 6 shown, the 3D printer feeding device provided by the present utility model further includes a discharge channel 7. The feeding device includes a material passing channel 8. One end of the material passing channel 8 is provided with a feeding port, and the other end is provided with a discharge port. The feeding port is used for the printing wire to enter, and the discharge port converges towards the discharge channel 7 and is communicated with the discharge channel 7 to turn the printing wire in the material passing channel 8 to the discharge channel 7.

[0136] Among them, at least two material passing channels 8 can be one, two, three, four or other numbers, and the material passing channels 8 are arranged in the wire conveying direction.

[0137] In an implementable manner, as Figure 19As shown, the number of the material passing channels 8 is one, and the feed inlet of the material passing channel 8 is communicated with the guiding pipe 4.

[0138] It can be understood that the feeding device includes a first feeding mechanism 1. A material passing channel 8 is arranged inside the first feeding mechanism 1, and the inner diameter of the feed inlet of the material passing channel 8 is larger than that of the discharge outlet of the material passing channel 8.

[0139] It can be understood that the discharge outlet of the material passing channel 8 is communicated with the discharge channel 7. The material passing channel 8 is arranged in the first feeding mechanism 1, and the discharge channel 7 is arranged in the second feeding mechanism 2; or, both the material passing channel 8 and the discharge channel 7 are arranged in the first feeding mechanism 1.

[0140] The 3D printer feeding device 100 provided in this embodiment passes multiple wire materials through one material passing channel 8, and turns the wire materials in the material passing channel 8 to the discharge channel 7, so as to realize the switching conveyance of multiple wire materials relative to the discharge channel 7.

[0141] In an implementable manner, the number of the material passing channels 8 is at least two.

[0142] The 3D printer feeding device 100 provided in this embodiment realizes the switching conveyance of multiple wire materials relative to the discharge channel 7 by respectively passing multiple wire materials through different material passing channels 8 and turning the wire materials in the material passing channels 8 to the discharge channel 7. The colors of the wire materials supplied to the discharge channel 7 through each material passing channel 8 can be the same or different. For example, Figure 2 as shown, if the number of the material passing channels 8 is four, then at most four different color printing wire materials can be supplied into the discharge channel 7. Specifically, the color arrangement of the wire materials can be selected according to the requirements of the printing model to meet different requirements of the printing model.

[0143] Furthermore, when multiple consumables are of the same color, in the state that a certain wire material is exhausted or about to be exhausted, the wire material can be quickly replaced, the quick switching between multiple wire materials can be realized, the number of times of manually replacing the wire material can be reduced, and the printing efficiency can be improved.

[0144] Furthermore, when multiple consumables are of different colors, when it is necessary to change the color of the wire material, different color wire materials can be quickly replaced, the quick switching between different color wire materials can be realized, the problem that the color of the printing consumable is relatively single is solved, the use range of the product is expanded, and it is beneficial to improve the fineness and aesthetics of the printing model, reduce the number of times of manually replacing the wire material, and improve the printing efficiency.

[0145] It can be understood that the 3D printer feeding device 100 provided in the embodiment of the present utility model can provide a single color printing wire material to realize the single-color printing of the printing model, and can also provide multiple color printing consumables to realize the multi-color printing of the printing model, and has a wide application range.

[0146] In an implementable mode provided by the present utility model, the feeding device includes a first feeding mechanism 1 and a second feeding mechanism 2. The first feeding mechanism 1 includes a first half shell 81, and the second feeding mechanism 2 includes a second half shell 82; the material passing channel 8 includes a cavity defined by the first half shell 81 and the second half shell 82.

[0147] As Figure 2 、 Figure 5 and Figure 6 shown, the wire passes through the material passing channel 8 for turning and is supplied into the discharge channel 7. The material passing channel 8 has a feed port and a discharge port. The wire enters the material passing channel 8 through the feed port to complete turning, and then enters the discharge channel 7 through the discharge port.

[0148] It can be understood that, as Figure 2 shown, the first feeding mechanism 1 and the second feeding mechanism 2 are used in combination. The first feeding mechanism 1 is placed inside the second feeding mechanism 2. As Figures 7 - 10 shown, the first feeding mechanism 1 and the second feeding mechanism 2 are connected, and the outer wall of the part close to the discharge channel 7 is inclined inward to form a conical structure. At least two material passing channels 8 are enclosed between the first half shell 81 of the first feeding mechanism 1 and the second half shell 82 of the second feeding mechanism 2, and the part of the material passing channel 8 close to the discharge channel 7 is inclined towards the discharge channel 7.

[0149] As Figure 2 shown, the cavity defined between the first half shell 81 and the second half shell 82 is the material passing channel 8. The ends of the material passing channel 8 close to the feed port are distributed. The axial directions of the feed ports of the multiple material passing channels 8 are parallel to each other or inclined outward and diverge, so as to avoid collision between the wires located outside the material passing channel 8.

[0150] In an implementable mode provided by the present utility model, as Figure 4 、 Figure 12 and Figure 14 shown, the second feeding mechanism 2 includes a second feeding main body and a housing 5. The second feeding main body includes a second half shell 82, and the housing 5 is used to accommodate the first feeding mechanism 1 and the second feeding main body.

[0151] Wherein, the second feeding main body is placed inside the housing 5 and is relatively fixed in position with the housing 5. The second feeding main body and the housing 5 can be fixedly connected or movably connected, and the second feeding main body and the housing 5 can be an integrally formed structure or a split connection structure. It can be understood that the second half shell 82 is placed on the second feeding main body.

[0152] When the second feeding main body is movably connected to the housing 5, during the process of conveying the wire, to ensure that the positions of the second feeding main body and the housing 5 are relatively fixed, a connecting structure is provided to connect the second feeding main body and the housing 5. The connecting structure can be a bolt or a tenon structure, etc., to ensure that the second feeding main body and the housing 5 will not be displaced due to the feeding action, and maintain the stability of the material passing channel 8 structure.

[0153] Furthermore, the first feeding mechanism 1 is movably connected to the second feeding main body. During the process of conveying the wire, to ensure that the positions of the first feeding mechanism 1 and the second feeding mechanism 2 are relatively fixed, so as to maintain the stability of the material passing channel 8 structure.

[0154] In an implementable manner provided by the present utility model, as Figure 6 shown, the material passing channel 8 includes a straight section 91 and an arc section 92. One end of the straight section 91 starts from the feeding port, one end of the arc section 92 is connected to the straight section 91, and the other end ends at the discharging port.

[0155] As Figure 6 shown, the wire enters the straight section 91 through the feeding port, and the wire abuts against the arc section 92, or against the junction position of the arc section 92 and the straight section 91, so that the wire is bent and deformed along the shape of the arc section 92, and is supplied into the discharging channel 7.

[0156] Furthermore, as Figure 5 and Figure 12 shown, the second half housing 82 can have a smooth arc-shaped inner surface at the end opposite to the feeding port for guiding the wire entering the material passing channel 8, so that the wire is bent towards the direction close to the discharging channel 7. This arc-shaped inner surface is beneficial to guiding the wire entering the material passing channel 8, to prevent the wire from colliding with the inner wall of the material passing channel 8 and resulting in being unable to enter the discharging channel 7, causing problems such as material blockage.

[0157] It can be understood that the radian and length of the arc section 92 can be set according to the characteristics of the wire material, such as hardness, elasticity and size, etc., to meet the needs of different printing wires.

[0158] In an embodiment provided by the present utility model, as Figure 5 and Figure 6 shown, the straight section 91 is enclosed by a partial area of the first half housing 81, and the arc section 92 is enclosed by a partial area of the first half housing 81 and the second half housing 82.

[0159] Among them, the straight section 91 is located inside the first feeding mechanism 1, and the arc section 92 is formed by enclosing the first feeding mechanism 1 and the second feeding mechanism 2; when the second feeding mechanism 2 includes a second feeding main body and a housing 5, the arc section 92 is formed by enclosing the first feeding mechanism 1 and the second feeding main body.

[0160] It can be understood that the straight section 91 is arranged along the direction in which the wire enters from the feeding port, the first end of the arc section 92 is connected to the straight section 91, and the other end of the arc section 92 is connected to the discharge channel 7.

[0161] In an implementable embodiment, the material passing channel 8 can be closed along the circumferential direction, that is, the straight section 91 is closed along the circumferential direction, and the arc section 92 is closed along the circumferential direction, that is, the straight section 91 is closed along the circumferential direction, and the arc section 92 formed by enclosing the first half housing 81 and the second half housing 82 is closed along the circumferential direction.

[0162] As Figures 5 - 8 shown, in this embodiment, the straight section 91 is located inside the first feeding mechanism 1, a part of the arc section 92 is located inside the first feeding mechanism 1, and another part of the arc section 92 is located inside the second feeding mechanism 2, that is, the material passing channel 8 formed by splicing the first half housing 81 and the second half housing 82 is closed along the circumferential direction, and the splicing surface between the first half housing 81 and the second half housing 82 is located inside the arc section 92.

[0163] Furthermore, as Figure 7 and Figure 8 shown, the part of the first half housing 81 used to enclose the straight section 91 is arranged inside the first feeding mechanism 1, and the part of the first half housing 81 used to cooperate with the second half housing 82 to enclose the arc section 92 is exposed. As Figure 11 and Figure 12 shown, the second half housing 82 is arranged on the inner wall of the second feeding mechanism 2.

[0164] In another embodiment provided by the present utility model, the straight section 91 is formed by enclosing a partial area of the first half housing 81 and a partial area of the second half housing 82, and the arc section 92 is formed by enclosing a partial area of the first half housing 81 and a partial area of the second half housing 82.

[0165] In this embodiment, both the straight section 91 and the arc section 92 are formed by enclosing the first feeding mechanism 1 and the second feeding mechanism 2, that is, the first feeding mechanism 1 is provided with a semi-circular or arc-shaped groove, the second feeding mechanism 2 is provided with a semi-circular or arc-shaped groove, and the semi-circular or arc-shaped groove of the first feeding mechanism 1 is spliced with the semi-circular or arc-shaped groove on the second feeding mechanism 2 to form a complete straight section 91 and / or arc section 92; when the second feeding mechanism 2 includes a second feeding main body and a housing 5, the arc section 92 is formed by enclosing the first feeding mechanism 1 and the second feeding main body.

[0166] In an implementable manner, the material passing channel 8 can be closed circumferentially, that is, the straight section 91 is closed circumferentially, and the arc section 92 is closed circumferentially. That is, the straight section 91 enclosed by the first half shell 81 and the second half shell 82 is closed circumferentially, and the arc section 92 enclosed by the first half shell 81 and the second half shell 82 is closed circumferentially.

[0167] In this embodiment, a part of the straight section 91 is located inside the first feeding mechanism 1, another part of the straight section 91 is located inside the second feeding mechanism 2, a part of the arc section 92 is located inside the first feeding mechanism 1, and another part of the arc section 92 is located inside the second feeding mechanism 2. That is, the material passing channel 8 formed by splicing the first half shell 81 and the second half shell 82 is closed circumferentially, and the splicing surface between the first half shell 81 and the second half shell 82 is located inside the straight section 91 and the arc section 92, and can be arranged along the axial direction of the material passing channel 8.

[0168] Furthermore, the first half shell 81 is arranged on the outer wall of the first feeding mechanism 1, and the second half shell 82 is arranged on the inner wall of the second feeding mechanism 2.

[0169] Wherein, in an embodiment provided by the present utility model, the cross-section of the material passing channel 8 can be circular, which is beneficial to guiding the wire into the discharge channel 7 to prevent the problem of wire blockage caused by the extrusion of the inner wall of the material passing channel 8 on the wire.

[0170] Wherein, the cross-section of the material passing channel 8 can also be other shapes such as polygonal, oval, arc-shaped, etc., as long as it can guide the wire to turn into the discharge channel 7.

[0171] In an implementable manner, the material passing channel 8 is not closed circumferentially, that is, at least a part of the straight section 91 or the arc section 92 is not closed circumferentially. Since the wire abuts against the inner wall of the material passing channel 8 inside the material passing channel 8, the opening area can be located inside the material passing channel 8 to avoid the wire contacting the opening area, and the width of the opening is smaller than the diameter of the wire to prevent the wire from entering the opening position. Furthermore, a cutting knife can be provided to realize the function of cutting the wire. The cutting knife can cut the wire from the discharge channel 7, and can also be arranged inside the first feeding mechanism 1 to cut the wire from inside the material passing channel 8 through the opening area.

[0172] In an implementable manner, the guiding tube 4 includes a wire channel, and the wire channels are arranged in one-to-one correspondence with the material passing channels 8; the guiding connection assembly 3 is connected to the first feeding mechanism 1 and / or the second feeding mechanism 2.

[0173] Such as Figure 2 and Figure 5As shown, a guide tube 4 is provided at the position of the feed port of the feed channel 8 , and the wire enters the feed channel 8 through the guide tube 4 . The guide tube 4 is connected to the first feed mechanism 1 and / or the second feed mechanism 2 through the guide connection component 3 .

[0174] When the second feeding mechanism 2 includes a second feeding body and a shell 5 , the guide connection assembly 3 may be connected to the shell 5 .

[0175] Further, such as Figure 9 and Figure 10 As shown, the 3D printer feeding device further includes a tube groove 41 , which is provided on the first feeding mechanism 1 and is arranged corresponding to the guide tube 4 , and is used to be connected to one end of the guide tube 4 .

[0176] It can be understood that the inner diameter of the tube groove 41 is larger than the outer diameter of the guide tube 4, and at least a portion of the guide tube 4 is inserted into the interior of the tube groove 41 to fix one end of the guide tube 4. The tube groove 41 and the guide connection assembly 3 are used together to improve the stability of the guide tube 4.

[0177] A second aspect of the present invention further provides a 3D printer 200, comprising the 3D printer feeding device 100 of any one of the above-mentioned first aspects.

[0178] Furthermore, the 3D printer 200 also includes: a print head and a wire sensor. At least two wires are respectively transported by the feed channel 8 of the 3D printer feeding device 100 through the discharge channel 7 to the print head. The wire sensor detects whether there is wire passing through the print head, thereby determining whether the consumables enter or exit the print head.

[0179] It is understandable that the discharge channel 7 can only accommodate one wire to pass through, and the remaining wires are on standby in the feeding channel 8. When the wires need to be replaced, the wires in the discharge channel 7 are first returned to the feeding channel 8, or the wires are cut in the feeding channel 8.

[0180] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0181] In view of the foregoing detailed description, these and other changes may be made to these embodiments. This written description includes embodiments of the best mode to disclose the present utility model. The scope of the patent obtained for the present utility model is defined by the claims, and the claims are not limited by this disclosure. The protection scope of the present utility model is not limited thereto. Any person skilled in the art within the scope disclosed by the present utility model, making equivalent substitutions or changes based on the technical solution and concept of the present utility model, falls within the protection scope of the present utility model.

Claims

1. A 3D printer feeding device, characterized in that: The guide connection assembly comprises a feeding device, a guide tube and a guide connection assembly, wherein the guide connection assembly is connected to the feeding device, and the working state of the guide connection assembly comprises a first working state and a second working state. When the guide connection assembly is in the first working state, it abuts against the guide tube to clamp the guide tube, and when the guide connection assembly is in the second working state, it separates from the guide tube to release the guide tube. The guide connection assembly comprises a connecting head, a connecting seat, an elastic member and a restraining member. One end of the connecting head is movably connected to the guide tube, one end of the connecting seat is movably connected to the connecting head and the other end is connected to the feeding device. The elastic member applies an elastic force to the connecting head to make the guide connection assembly be in the first working state. The restraining member is placed between the connecting head and the elastic member and contacts the connecting head. The elastic member is sleeved on the restraining member so that the restraining member limits the deformation direction of the elastic member.

2. The 3D printer feeding device according to claim 1, characterized in that: The working position of the connector includes a first position for clamping the guide tube and a second position for releasing the guide tube, and the elastic member is used to apply elastic force to the connector to place the connector in the first position.

3. The 3D printer feeding device according to claim 2, characterized in that: When the connector moves from the second position to the first position, a portion of the connector is close to the guide tube, and when the connector reaches the first position, the connector clamps the guide tube; When the connecting head moves from the first position to the second position, a partial area of ​​the connecting head is away from the guide tube, and when the connecting head reaches the second position, the guide tube is released.

4. The 3D printer feeding device according to claim 1, characterized in that: The connector comprises: An annular member, wherein the annular member is provided with a second through hole for accommodating the guide tube; A clamping portion, the clamping portion comprising at least two clamping teeth circumferentially arranged on the annular member, one end of the clamping teeth being relatively fixed to the annular member, and the other end of the clamping teeth being a free end; A limiting member, which is arranged at one end of the clamping tooth away from the annular member and protrudes outward; Among them, the cavity defined by the multiple clamping teeth is a clamping cavity, and the clamping teeth are elastic so that the free ends of the clamping teeth can move closer to or away from the guide tube to adjust the inner diameter of one end of the clamping cavity to clamp or release the guide tube.

5. The 3D printer feeding device according to claim 4, characterized in that: The first end of the elastic member is in contact with the connecting head through the restraining member, and the second end of the elastic member is relatively fixed to the connecting seat.

6. The 3D printer feeding device according to claim 4, characterized in that: The connection seat is provided with a first through hole for the connection head to pass through.

7. The 3D printer feeding device according to any one of claims 1 to 6, characterized in that: The 3D printer feeding device also includes a discharge channel, and the feeding device includes a feed channel, one end of the feed channel is provided with a feed port, and the other end is provided with a discharge port, the feed port is used to enter the printing wire, and the discharge port converges in the direction of the discharge channel and is connected with the discharge channel, so as to divert the printing wire in the feed channel to the discharge channel.

8. A 3D printer, characterized in that: It comprises a 3D printer feeding device as described in any one of claims 1 to 7.

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