Wire conveying device and 3D printer

Abstract

The wire conveying device comprises a feeding device and a discharging channel, the feeding device comprises at least two material passing channels, discharging ports of the material passing channels converge in the direction of the discharging channel and are communicated with the discharging channel, and printing wires in the material passing channels are turned to the discharging channel. According to the utility model, switching conveying among a plurality of wire rods is realized, so that the plurality of wire rods are respectively supplied to the discharging channel through different material passing channels, the frequency of manually replacing the wire rods is reduced, and the printing efficiency is greatly improved; and the wires of different colors can be switched for conveying, so that the printed model can have multiple colors, consumables do not need to be frequently and manually replaced when the printing colors are replaced, the problem that the color of the printing consumables is relatively single is solved, the application range of the product is expanded, the fineness and the attractiveness of the printed model are improved, and the production efficiency is improved. Meanwhile, the wire replacement frequency is reduced, and the printing efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printers, and in particular to a wire conveying device and a 3D printer. Background Art

[0002] A 3D printer is a machine that uses rapid prototyping technology. It is based on a digital model file and uses special wax materials, powdered metals or plastics and other bonded printing wires to create three-dimensional objects by printing multiple layers of bonded printing wires in sequence.

[0003] 3D printers generally use linear consumables. Before printing, one end of the linear consumable is inserted into the print head. Since the print head of the 3D printer can only deliver one linear consumable, when one consumable is used up during printing, it is necessary to replace the consumable in time, resulting in reduced printing efficiency. In addition, the color of the consumable is fixed. 3D printers can usually only realize monochrome printing of models, resulting in a single color of the printed model and poor model precision. The utility model proposes a new solution to the above problems. Utility Model Content

[0004] In order to overcome at least one of the above-mentioned disadvantages, the present invention provides a wire conveying device and a 3D printer. The purpose of the present invention can be achieved by adopting the following technical solutions:

[0005] An embodiment of the first aspect of the utility model provides a wire conveying device, including a feeding device and a discharging channel, the feeding device includes at least two feeding channels, one end of the feeding channel is provided with a feeding port, and the other end is provided with a discharging port, the feeding port is used for entering the printing wire, at least two of the discharging ports converge in the direction of the discharging channel and are connected with the discharging channel, so as to divert the printing wire in the feeding channel to the discharging channel.

[0006] In one embodiment, the feeding device comprises:

[0007] a first feed mechanism, the first feed mechanism comprising a first half shell;

[0008] a second feed mechanism, the second feed mechanism comprising a second half shell;

[0009] Wherein, the material transfer channel includes a cavity defined by the first half shell and the second half shell.

[0010] In one embodiment, the second feeding mechanism comprises a second feeding body and a shell, the second feeding body comprises the second half shell, and the shell is used to accommodate the first feeding mechanism and the second feeding body;

[0011] Wherein, the first feeding mechanism is movably connected to the second feeding body,

[0012] The second feed body is movably connected to the shell; or, the second feed body is fixedly connected to the shell.

[0013] In one embodiment, the feed channel comprises:

[0014] A straight section, one end of which starts from the feed inlet;

[0015] An arc section, one end of which is connected to the straight section, and the other end of which stops at the discharge port.

[0016] In one possible implementation manner, the straight section is enclosed by a partial region of the first half shell, and the arc section is enclosed by a partial region of the first half shell and the second half shell.

[0017] In one possible implementation manner, the straight section is closed along the circumferential direction, and the arc section enclosed by the first half shell and the second half shell is closed along the circumferential direction.

[0018] In one embodiment, the portion of the first half shell used to enclose the straight section is arranged inside the first feeding mechanism, the portion of the first half shell used to cooperate with the second half shell to enclose the arc section is exposed, and the second half shell is arranged on the inner wall of the second feeding mechanism.

[0019] In one possible implementation manner, the straight section is enclosed by a partial region of the first half shell and a partial region of the second half shell, and the arc section is enclosed by a partial region of the first half shell and a partial region of the second half shell.

[0020] In one possible implementation manner, the straight 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.

[0021] In one embodiment, the first half shell is arranged on the outer wall of the first feeding mechanism, and the second half shell is arranged on the inner wall of the second feeding mechanism.

[0022] In one embodiment, the wire conveying device further includes:

[0023] A plurality of guide tubes, each of which includes a wire channel, and each of the wire channels is arranged in a one-to-one correspondence with the material transfer channel;

[0024] A guide connection assembly has one end connected to the guide tube and the other end connected to the first feeding mechanism and / or the second feeding mechanism.

[0025] In one possible implementation manner, the wire conveying device further includes a tube groove, which is provided on the first feeding mechanism and is arranged corresponding to the guide tube for connecting to one end of the guide tube.

[0026] In one embodiment, the guide connection assembly includes:

[0027] A connector, one end of which is movably connected to the guide tube;

[0028] A connecting seat, one end of which is movably connected to the connecting head, and the other end of which is connected to the first feeding mechanism and / or the second feeding mechanism. The connecting seat is provided with a first through hole for the guide tube and / or the connecting head to pass through.

[0029] In one possible embodiment, the connection method between the connector and the connector seat includes at least one of a clamping connection, a snap connection, a threaded connection and a plug-in connection; the connection method between the connector and the guide tube includes at least one of a clamping connection, a snap connection, a threaded connection and a plug-in connection.

[0030] In one possible implementation manner, a buckle is provided on the connecting seat, and a slot corresponding to the buckle is provided on the second feeding mechanism.

[0031] In one possible implementation, the working position of the connector includes a first position and a second position;

[0032] 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;

[0033] 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.

[0034] In one embodiment, the connector includes:

[0035] An annular member, wherein the annular member is provided with a second through hole for accommodating the guide tube;

[0036] 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;

[0037] A limiting member, which is arranged at one end of the clamping tooth away from the annular member and protrudes outward;

[0038] 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 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.

[0039] In one embodiment, the connector further comprises a protrusion, which is arranged on the inner wall of the clamping tooth and extends toward the clamping cavity, one end of the protrusion is connected to the clamping tooth, and the other end extends toward the direction of the limit member, and the protrusion has a certain elasticity.

[0040] In one embodiment, the outer diameter of the connection end between the clamping portion and the annular member is smaller than the outer diameter of the connection end between the clamping portion and the stopper, the outer diameter of the connection end between the clamping portion and the annular member is smaller than the outer diameter of the annular member, and the outer diameter of the connection end between the clamping portion and the stopper is smaller than the outer diameter of the stopper;

[0041] The inner diameter of the first through hole is larger than the outer diameter of the connecting end of the clamping portion and the annular member, and smaller than the outer diameter of the annular member.

[0042] In one embodiment, the guide connection assembly also includes an elastic member, a first end of the elastic member is connected to the connecting head, a second end of the elastic member is relatively fixed to the connecting seat, and the elastic member is used to apply an elastic force to the connecting head so that the connecting head is in the first position.

[0043] In one possible implementation, the elastic member is at least one of a tension spring, a compression spring, a torsion spring and an elastic sheet.

[0044] In one embodiment, the guide connection assembly further comprises a groove, which is provided on the first feeding mechanism and is arranged corresponding to the elastic member, and at least a portion of the elastic member is located inside the groove.

[0045] In one embodiment, when the connector is switched between the first position and the second position, the connector seat abuts against the outer wall of the clamping teeth, so that the clamping teeth are deformed to clamp or release the guide tube;

[0046] Wherein, the inner diameter of the first through hole at one end close to the annular member is larger than the inner diameter of the first through hole at one end close to the limiting member, so as to be arranged corresponding to the outer wall of the clamping portion.

[0047] In one possible implementation manner, when the connector is in the first position, the connector seat abuts against the limiting member; and when the connector is in the second position, the connector seat abuts against the annular member.

[0048] An embodiment of the second aspect of the present utility model provides a 3D printer, comprising the wire conveying device described in any one of the first aspects above.

[0049] Beneficial technical effects of the utility model: According to the content of the present disclosure, the utility model provides a wire conveying device and a 3D printer, the wire conveying device includes a feeding device and a discharging channel, the feeding device includes at least two feeding channels, the discharging ports of the feeding channels all converge in the direction of the discharging channel and are connected with the discharging channel, and the printing wire in the feeding channel is diverted to the discharging channel, which can realize switching and conveying between multiple wires, so that multiple wires are respectively supplied to the discharging channel through different feeding channels, reducing the number of manual wire replacements and greatly improving printing efficiency; and it is possible to switch the delivery of wires of different colors, so that the printed model can be in multiple colors. When changing the printing color, there is no need to frequently manually replace the consumables, which solves the problem of the relatively single color of the printing consumables, expands the scope of use of the product, and is conducive to improving the fineness and aesthetics of the printed model, while reducing the number of wire replacements and greatly improving printing efficiency.

[0050] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0052] Figure 1 A schematic diagram of the connection structure between the wire conveying device and the 3D printer structure is shown;

[0053] Figure 2 A schematic diagram of the three-dimensional structure of the wire conveying device is shown;

[0054] Figure 3 The overall structural schematic diagram of the wire conveying device is shown;

[0055] Figure 4 A front cross-sectional view of a wire conveying device is shown;

[0056] Figure 5A front cross-sectional view of a straight section and an arc section is shown;

[0057] Figure 6 A schematic diagram of the structure of the first feeding mechanism is shown at an angle;

[0058] Figure 7 A schematic diagram of the structure of the first feeding mechanism from another angle is shown;

[0059] Figure 8 A structural cross-sectional view of a first feeding mechanism is shown;

[0060] Fig. 9 A front cross-sectional view of a first feeding mechanism is shown;

[0061] Fig.10 A schematic diagram of the structure of the second feeding mechanism is shown at an angle;

[0062] Fig.11 A structural cross-sectional view of a second feeding mechanism is shown;

[0063] Fig.12 A schematic diagram of the connecting seat structure is shown;

[0064] Fig.13 A schematic diagram of the housing structure is shown;

[0065] Fig.14 A schematic diagram of the three-dimensional structure of the connector is shown;

[0066] Fig.15 Shows a structural front view of the connector;

[0067] Fig.16 A front cross-sectional view of the connector and the connector base is shown when the connector is in a first position;

[0068] Fig.17 A front cross-sectional view of the connector and the connector base is shown when the connector is in the second position.

[0069] In the figure:

[0070] 100. Wire conveying device; 200. 3D printer;

[0071] 1. First feeding mechanism; 2. Second feeding mechanism; 3. Guide connection assembly; 4. Guide tube; 5. Shell; 7. Discharging channel; 8. Feeding channel;

[0072] 31. Connector; 32. Connecting seat; 33. Elastic member; 34. Groove; 41. Pipe groove;

[0073] 311, annular member; 312, clamping portion; 313, limiting member; 3121, clamping teeth; 3122, convex portion;

[0074] 321, first through hole; 322, buckle; 323, slot;

[0075] 81. First half shell; 82. Second half shell; 91. Straight section; 92. Arc section. DETAILED DESCRIPTION

[0076] In the following detailed disclosure, these embodiments are fully described with reference to the accompanying drawings. In order to make the technical scheme of the utility model more clear and specific to those skilled in the art, the implementation methods described below are not limited to this. The utility model is further described in detail below in combination with the embodiments and the accompanying drawings.

[0077] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0078] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0079] The 3D printers in the related art only deliver wires through one feed port, resulting in low wire delivery efficiency and a single color. For example, when the previous wire is exhausted, printing needs to be paused and the wire needs to be replaced. When printing in multiple colors is required, printing also needs to be paused and the wire needs to be replaced, which will affect printing efficiency and printing quality.

[0080] like Figures 2 to 5 As shown, the utility model provides a wire conveying device 100, which can be used as follows Figure 1 In the 3D printer 200 shown, the wire conveying device 100 of this embodiment includes a feeding device and a discharging channel 7. The feeding device includes at least two feeding channels 8. A feeding port is provided at one end of the feeding channel 8, and a discharging port is provided at the other end. The feeding port is used for entering the printing wire. At least two discharging ports converge in the direction of the discharging channel 7 and are connected to the discharging channel 7, so as to divert the printing wire in the feeding channel 8 to the discharging channel 7.

[0081] The at least two material transfer channels 8 may be two, three, four or other numbers, and the material transfer channels 8 are arranged according to the direction of wire conveying.

[0082] The wire conveying device 100 provided in this embodiment realizes switching conveyance of multiple wires relative to the discharge channel 7 by passing multiple wires through different feeding channels 8 respectively and diverting the wires in the feeding channels 8 to the discharge channel 7. The colors of the wires supplied to the discharge channel 7 through each feeding channel 8 can be the same or different, such as Figure 2 The number of the feed channels 8 shown is four, and at most four different colors of printing wires can be supplied to the discharge channel 7. Specifically, the color arrangement of the wires can be selected according to the requirements of the printing model to meet the different requirements of the printing model.

[0083] Furthermore, when multiple consumables are of the same color, when a certain wire is exhausted or about to be exhausted, the wire can be quickly replaced to achieve rapid switching between multiple wires, reduce the number of manual wire replacement times, and improve printing efficiency.

[0084] Furthermore, when multiple consumables are of different colors, when the wire color needs to be changed, the wires of different colors can be quickly replaced, realizing rapid switching between wires of different colors, solving the problem of relatively single color of printing consumables, expanding the scope of use of the product, and helping to improve the fineness and aesthetics of the printed model, reducing the number of manual wire replacement times, and improving printing efficiency.

[0085] It can be understood that the wire conveying device 100 provided in the embodiment of the utility model can provide a single color of printing wire to achieve monochrome printing of the printing model, and can also provide multiple colors of printing consumables to achieve multi-color printing of the printing model, and has a wide range of applications.

[0086] In an embodiment provided by the present invention, 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, wherein the feed channel 8 includes a cavity defined by the first half shell 81 and the second half shell 82.

[0087] like Figure 2 , Figure 4 and Figure 5 As shown, the wire material is turned through the material channel 8 and supplied to the discharge channel 7. The material channel 8 has a feed port and a discharge port. The wire material enters the material channel 8 through the feed port to complete the turning, and then enters the discharge channel 7 through the discharge port.

[0088] It is understandable that if Figure 2As shown, the first feeding mechanism 1 and the second feeding mechanism 2 are used together, and the first feeding mechanism 1 is placed inside the second feeding mechanism 2. Figure 6-Figure 9 As shown, the first feeding mechanism 1 is connected to the second feeding mechanism 2, and the outer wall of a partial area close to the discharge channel 7 is tilted inward to form a conical structure, and at least two transfer 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 a partial area of ​​the transfer channel 8 close to the discharge channel 7 is tilted toward the discharge channel 7.

[0089] like Figure 2 As shown, the cavity defined between the first half shell 81 and the second half shell 82 is a feed channel 8, and the feed channels 8 are distributed near one end of the feed port. The axial directions of the feed ports of multiple feed channels 8 are parallel to each other or diffuse outwardly to avoid collision between the wires outside the feed channels 8.

[0090] In one possible implementation mode provided by the present utility model, as Figure 3 , Fig.11 and Fig.13 As shown, the second feeding mechanism 2 includes a second feeding body and a shell 5. The second feeding body includes a second half shell 82. The shell 5 is used to accommodate the first feeding mechanism 1 and the second feeding body.

[0091] Among them, the second feed body is placed in the shell 5 and is relatively fixed in position with the shell 5. The second feed body and the shell 5 can be fixedly connected or movably connected. The second feed body and the shell 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 feed body.

[0092] When the second feed body and the shell 5 are movably connected, during the wire conveying process, the positions of the second feed body and the shell 5 are ensured to be relatively fixed, and a connecting structure is provided to connect the second feed body and the shell 5. The connecting structure can be made of bolts or tenons to ensure that the second feed body and the shell 5 will not be displaced due to the feeding action, thereby maintaining the stability of the structure of the feed channel 8.

[0093] Furthermore, the first feeding mechanism 1 is movably connected to the second feeding body, and during the wire conveying process, the positions of the first feeding mechanism 1 and the second feeding mechanism 2 are ensured to be relatively fixed to maintain the stability of the structure of the feeding channel 8.

[0094] In one possible implementation mode provided by the present utility model, as Figure 5 As shown, the material transfer channel 8 includes a straight section 91 and an arc section 92 , wherein one end of the straight section 91 starts from the feed port, one end of the arc section 92 is connected to the straight section 91 , and the other end ends at the discharge port.

[0095] like Figure 5 As shown, the wire enters the straight section 91 through the feed port, and the wire abuts against the arc section 92, or the intersection of the arc section 92 and the straight section 91, so that the wire bends and deforms along the shape of the arc section 92, and is supplied to the discharge channel 7.

[0096] Further, such as Figure 4 and Fig.11 As shown, the second half shell 82 has a smooth arc-shaped inner surface at the end opposite to the feed port for guiding the wire entering the feed channel 8 so that the wire bends toward the direction close to the discharge channel 7. The arc-shaped inner surface is beneficial for guiding the wire entering the feed channel 8 to prevent the wire from colliding with the inner wall of the feed channel 8 and thus being unable to enter the discharge channel 7, causing blockage and other problems.

[0097] It is understandable that the curvature and length of the arc section 92 can be set according to the material of the wire, such as hardness, elasticity, size and other characteristics, to meet the needs of different printing wires.

[0098] In an embodiment provided by the present utility model, Figure 4 and Figure 5 As shown, the straight section 91 is enclosed by a partial region of the first half shell 81 , and the arc section 92 is enclosed by a partial region of the first half shell 81 and the second half shell 82 .

[0099] Among them, the straight section 91 is located in the first feeding mechanism 1, and the arc section 92 is formed by the first feeding mechanism 1 and the second feeding mechanism 2; when the second feeding mechanism 2 includes a second feeding body and a shell 5, the arc section 92 is formed by the first feeding mechanism 1 and the second feeding body.

[0100] It can be understood that the straight section 91 is arranged along the direction in which the wire enters from the feed 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 .

[0101] In one embodiment, the feed channel 8 is 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 enclosed by the first half shell 81 and the second half shell 82 is closed along the circumferential direction.

[0102] like Figure 4-Figure 7As shown, in this embodiment, the straight section 91 is located in the first feeding mechanism 1, a part of the arc section 92 is located in the first feeding mechanism 1, and the other part of the arc section 92 is located in the second feeding mechanism 2, that is, the feed channel 8 formed by the first half shell 81 and the second half shell 82 is closed along the circumferential direction, and the splicing surface between the first half shell 81 and the second half shell 82 is located in the arc section 92.

[0103] Further, such as Figure 6 and Figure 7 As shown, the portion of the first half shell 81 used to enclose the straight section 91 is arranged inside the first feeding mechanism 1, and the portion of the first half shell 81 used to cooperate with the second half shell 82 to enclose the arc section 92 is exposed. Fig.10 and Fig.11 As shown, the second half shell 82 is arranged on the inner wall of the second feeding mechanism 2.

[0104] In another embodiment provided by the present invention, the straight section 91 is enclosed by a partial area of ​​the first half shell 81 and a partial area of ​​the second half shell 82 , and the arc section 92 is enclosed by a partial area of ​​the first half shell 81 and a partial area of ​​the second half shell 82 .

[0105] In this embodiment, the straight section 91 and the arc section 92 are both formed by the first feeding mechanism 1 and the second feeding mechanism 2, that is, the first feeding mechanism 1 is provided with a semicircular or arc-shaped groove, and the second feeding mechanism 2 is provided with a semicircular or arc-shaped groove, and the semicircular or arc-shaped groove of the first feeding mechanism 1 is spliced ​​with the semicircular 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 body and a shell 5, the arc section 92 is formed by the first feeding mechanism 1 and the second feeding body.

[0106] In one embodiment, the feed channel 8 is 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 enclosed by the first half shell 81 and the second half shell 82 is closed along the circumferential direction, and the arc section 92 enclosed by the first half shell 81 and the second half shell 82 is closed along the circumferential direction.

[0107] In this embodiment, a portion of the straight section 91 is located in the first feeding mechanism 1, another portion of the straight section 91 is located in the second feeding mechanism 2, a portion of the arc section 92 is located in the first feeding mechanism 1, and another portion of the arc section 92 is located in the second feeding mechanism 2, that is, the transfer channel 8 formed by the first half shell 81 and the second half shell 82 is closed along the circumferential direction, and the splicing surface between the first half shell 81 and the second half shell 82 is located in the straight section 91 and the arc section 92, and is arranged along the axial direction of the transfer channel 8.

[0108] 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 .

[0109] Among them, according to an embodiment provided by the utility model, the cross-section of the feeding channel 8 is circular, which is conducive to guiding the wire into the discharge channel 7 to prevent the inner wall of the feeding channel 8 from squeezing the wire and causing wire blockage.

[0110] The cross section of the feeding channel 8 may also be a polygon, an ellipse, an arc or other shapes, as long as it can guide the wire to turn and enter the discharging channel 7.

[0111] In one embodiment, the feed channel 8 is not closed along the circumferential direction, that is, at least a part of the straight section 91 or the arc section 92 is not closed along the circumferential direction. Since the wire material abuts against the inner wall of the feed channel 8 in the feed channel 8, the opening area can be located on the inner side of the feed channel 8 to avoid the wire material from contacting the opening area, and the width of the opening is smaller than the diameter of the wire material to prevent the wire material from entering the opening position. Furthermore, the wire material can be cut off by setting a cutter, which can cut off the wire material from the discharge channel 7, and can also be set in the first feeding mechanism 1 to cut off the wire material from the feed channel 8 through the opening area.

[0112] In an embodiment provided by the utility model, the wire conveying device 100 also includes a plurality of guide tubes 4 and a guide connection assembly 3, the guide tube 4 includes a wire channel, and the wire channel is arranged in a one-to-one correspondence with the material transfer channel 8; one end of the guide connection assembly 3 is connected to the guide tube 4, and the other end is connected to the first feeding mechanism 1 and / or the second feeding mechanism 2.

[0113] like Figure 2 and Figure 4 As 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 .

[0114] 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 .

[0115] Further, such as Figure 8 and Fig. 9 As shown, the wire conveying device 100 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 .

[0116] 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.

[0117] In this embodiment, if Figure 2-Figure 4 As shown, the guide connection assembly 3 includes a connector 31, one end of which is movably connected to the guide tube 4. It can be understood that the guide tube 4 is detachably connected to the connector 31, and the guide tube 4 is finally connected to the first feeding mechanism 1 and / or the second feeding mechanism 2 through the connector 31.

[0118] Among them, Figure 2-Figure 4 As shown, the guide connection assembly 3 also includes a connection seat 32, one end of the connection seat 32 is movably connected to the connection head 31, and the other end is connected to the first feeding mechanism 1 and / or the second feeding mechanism 2. Fig.12 As shown, the connection seat 32 is provided with a first through hole 321 for the guide tube 4 and / or the connection head 31 to pass through.

[0119] In specific implementation, the guide tube 4 is connected to the connection seat 32 through the connector 31, and the connection 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 body and a shell 5, the connection seat 32 can be connected to the shell 5. It can be understood that the first through hole 321 on the connection seat 32 is arranged in a one-to-one correspondence with the guide tube 4, and the guide tube 4 passes through the first through hole 321 and one end is inserted into the tube groove 41, which can improve the stability of the position of the guide tube 4.

[0120] Among them, Fig.12 and Fig.13 As shown, the connection seat 32 is provided with a buckle 322, and the second feeding mechanism 2 is provided with a slot 323 corresponding to the buckle 322. The connection seat 32 is provided with a buckle 322 protruding outward, and the second feeding mechanism 2 is provided with a slot 323 corresponding to the buckle 322. When the connection seat 32 is connected to the second feeding mechanism 2, the buckle 322 is inserted into the slot 323 to achieve relative fixation of the connection seat 32 and the second feeding mechanism 2. It can be understood that when the second feeding mechanism 2 includes a second feeding body and a shell 5, as shown in FIG. Fig.13 As shown, the slot 323 is opened on the housing 5 .

[0121] Further, such as Fig.16 and Fig.17As shown, the working position of the connector 31 includes a first position and a second position; when the connector 31 moves from the second position to the first position, a partial area of ​​the connector 31 is close to the guide tube 4, and when the connector 31 reaches the first position, the guide tube 4 is clamped; when the connector 31 moves from the first position to the second position, a partial area of ​​the connector 31 is away from the guide tube 4, and when the connector 31 reaches the second position, the guide tube 4 is released.

[0122] It can be understood that the guide tube 4 is clamped by the connector 31 , and the guide tube 4 is clamped or released during the switching of the connector 31 between the first position and the second position.

[0123] Further, such as Fig.14 and Fig.15 As shown, the connector 31 includes an annular member 311, a clamping portion 312 and a limiting member 313. The annular member 311 is provided with a second through hole for accommodating the guide tube 4. 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 one end of the clamping tooth 3121 away from the annular member 311 and protrudes outward.

[0124] The guide tube 4 is inserted into the connector 31, and the guide tube 4 passes through the second through hole on the annular member 311. The clamping portion 312 is sleeved on the guide tube 4, and at least two clamping teeth 3121 are circumferentially arranged along the guide tube 4. When the connector 31 clamps the guide tube 4, the clamping teeth 3121 abut against the outer wall of the guide tube 4. It can be understood that the number of the clamping teeth 3121 is at least two, and at least two clamping teeth 3121 are correspondingly arranged to clamp the guide tube 4. In the process of the connector 31 clamping or releasing the guide tube 4, the clamping teeth 3121 are deformed, and the free ends of the clamping teeth 3121 move toward or away from the guide tube 4.

[0125] The cavity defined by the plurality of clamping teeth 3121 is a clamping cavity, and the clamping teeth 3121 are elastic, so that the free end of the clamping teeth 3121 moves closer to or away from the guide tube 4 to adjust the inner diameter of one end of the clamping cavity to clamp or release the guide tube 4. In a specific implementation, the clamping teeth 3121 can be made of materials such as plastic, rubber and metal, and can be a metal material with a certain hardness and elasticity, such as iron, steel, copper and other metals or alloys.

[0126] Among them, Fig.14 and Fig.15As shown, the outer diameter of the connection end between the clamping portion 312 and the annular member 311 is smaller than the outer diameter of the connection end between the clamping portion 312 and the stopper 313, the outer diameter of the connection end between 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 between the clamping portion 312 and the stopper 313 is smaller than the outer diameter of the stopper 313; Figure 4 , Fig.16 and Fig.17 As shown, the inner diameter of the first through hole 321 is larger than the outer diameter of the connection end between the clamping portion 312 and the annular member 311 , and smaller than the outer diameter of the annular member 311 .

[0127] 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, and the annular member 311 and the limiting member 313 respectively form stops 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, and 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, and when the connecting head 31 is extruded by the connecting seat 32, the free end of the clamping tooth 3121 moves toward the guide tube 4 until it abuts against the guide tube 4, and 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.

[0128] like Fig.16 and Fig.17 As shown, during the switching process of the connector 31 between the first position and the second position, the connector seat 32 abuts against the outer wall of the clamping teeth 3121 , so that the clamping teeth 3121 are deformed to clamp or release the guide tube 4 .

[0129] In a 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 stopper 313, so as to correspond to the outer wall of the clamping portion 312. It can be understood that the cross-sectional shape of the first through hole 321 is a trapezoid, which is adapted to the outer wall shape of the clamping portion 312 of the connector 31.

[0130] In one possible implementation mode provided by the present utility model, as Figure 2 and Figure 4 As shown, the guide connection assembly 3 also includes an elastic member 33, a first end of the elastic member 33 is connected to the connecting head 31, and a second end of the elastic member 33 is relatively fixed to the position of the connecting seat 32, and the elastic member 33 is used to apply an elastic force to the connecting head 31 so that the connecting head 31 is in the first position.

[0131] It can be understood that the elastic member 33 is provided to drive the connector 31 to switch from the second position to the first position, and an elastic force is applied to the connector 31 so that the connector 31 is in the first position, so that the connector 31 moves to an operating position that satisfies the clamping of the guide tube 4.

[0132] Among them, the elastic member 33 is located outside the wire feeding trajectory, that is, it can be set on the outside of the guide tube 4 or sleeved on the guide tube 4, the first end of the elastic member 33 is connected to the connecting head 31, the second end of the elastic member 33 is connected to the first feeding mechanism 1 or the second feeding mechanism 2, the second end of the elastic member 33 and the connecting seat 32 are relatively fixed, and the elastic member 33 applies force to the connecting head 31 so that the limit member 313 of the connecting head 31 abuts against the connecting seat 32, and the clamping teeth 3121 are squeezed inward by the first through hole 321 and abut against the outer wall of the guide tube 4 to clamp the guide tube 4; therefore, under the action of the elastic member, the connecting head 31 remains in the first position to clamp the guide tube 4.

[0133] When the connector 31 is in the first position or the second position, the elastic member 33 can remain in a deformed state to maintain the force applied to the connector 31 .

[0134] In this embodiment, the elastic member 33 is a compression spring, and the first end of the elastic member 33 is in contact with or fixedly connected to the connector 31, and the other end of the elastic member 33 is in contact with or fixedly connected to the first feeding mechanism 1, that is, the other end of the elastic member 33 and the connector seat 32 are relatively stationary. Figure 6 , Figure 8 and Fig. 9 As shown, the guide connection assembly 3 further includes a groove 34, which is provided on the first feeding mechanism 1 and is arranged corresponding to the elastic member 33, and at least a portion of the elastic member 33 is located inside the groove 34. It can be understood that the groove 34 is provided at the feeding port position of the feeding channel 8 of the first feeding mechanism 1 to accommodate the elastic member 33 and improve the stability of the elastic member 33.

[0135] Among them, the tube groove 41 for connecting the guide tube 4 is opened at the feed port position. If the elastic member 33 is sleeved on the guide tube 4, the inner diameter of the groove 34 is larger than the inner diameter of the tube groove 41. In view of this, the groove 34 can be set on the side of the tube groove 41 close to the connecting seat 32, and the groove 34, the tube groove 41 and the feed port of the material transfer channel 8 can be coaxially arranged.

[0136] In an embodiment provided by the present utility model, the elastic member 33 is at least one of a tension spring, a compression spring, a torsion spring and an elastic sheet.

[0137] In some possible embodiments provided by the present disclosure, the elastic member 33 is a tension spring, a first end of the tension spring is connected to the connecting head 31, and a second end of the tension spring is relatively fixed to the connecting seat 32, that is, the second end of the tension spring is connected to the connecting seat 32, and the tension spring is located on the outside of the guide tube 4 or is sleeved on the outer peripheral side of the guide tube 4, and can stably provide elastic force so that the connecting head 31 can switch from the second position to the first position until it remains in the first position.

[0138] In some possible embodiments provided by the present disclosure, the elastic member 33 is a compression spring, the first end of the compression spring is connected to the connecting head 31, and the second end of the compression spring is relatively fixed to the connecting seat 32, that is, the second end of the compression spring is connected to the first feeding mechanism 1, and the compression spring is located on the outside of the guide tube 4 or is sleeved on the outer peripheral side of the guide tube 4, and can provide stable elastic force so that the connecting head 31 can switch from the second position to the first position until it remains in the first position.

[0139] In some possible embodiments provided by the present disclosure, the elastic member 33 is a torsion spring, the first end of the torsion spring is connected to the connecting head 31, and the second end of the torsion spring is relatively fixed to the connecting seat 32, that is, the second end of the torsion spring is connected to the first feeding mechanism 1 or the connecting seat 32, and the torsion spring is located on the outside of the guide tube 4, and can provide stable elastic force so that the connecting head 31 can switch from the second position to the first position until it remains in the first position.

[0140] In some possible embodiments provided by the present disclosure, the elastic member 33 is an elastic sheet, the first end of the elastic sheet is connected to the connecting head 31, and the second end of the elastic sheet is relatively fixed to the connecting seat 32, that is, the second end of the elastic sheet is connected to the first feeding mechanism 1 or the connecting seat 32, and the elastic sheet is located on the outside of the guide tube 4 or is sleeved on the outer peripheral side of the guide tube 4, and can stably provide elastic force so that the connecting head 31 can switch from the second position to the first position until it remains in the first position.

[0141] It is understandable that the elastic member 33 may also be an elastic member other than a tension spring, a compression spring, a torsion spring and an elastic sheet, which can provide elastic force so that the connector 31 can switch from the second position to the first position.

[0142] Among them, Fig.16 and Fig.17 As shown, when the connector 31 is in the first position, the connector seat 32 abuts against the stopper 313. During the process of switching the connector 31 from the second position to the first position, the connector 31 moves along the inner wall of the first through hole 321 in a direction away from the first feeding mechanism 1, and the first through hole 321 of the connector seat 32 gradually increases the pressure applied to the clamping portion 312, and the inner diameter of one end of the clamping cavity defined in the clamping portion 312 is reduced until the clamping teeth 3121 abut against the guide tube 4, thereby clamping the guide tube 4.

[0143] Among them, Fig.16 and Fig.17 As shown, when the connector 31 is in the second position, the connector seat 32 abuts against the annular member 311. During the process of switching the connector 31 from the first position to the second position, the connector 31 moves along the inner wall of the first through hole 321 toward the first feeding mechanism 1, and the first through hole 321 of the connector seat 32 gradually reduces the pressure applied to the clamping portion 312, and the inner diameter of one end of the clamping cavity defined in the clamping portion 312 increases until the clamping teeth 3121 are disengaged from the guide tube 4, releasing the guide tube 4.

[0144] Further, such as Fig.16 and Fig.17 As shown, the connector 31 also includes a protrusion 3122, which is arranged on the inner wall of the clamping tooth 3121 and extends toward the clamping cavity. One end of the protrusion 3122 is connected to the clamping tooth 3121, and the other end of the protrusion 3122 extends toward the direction of the limit member 313. The protrusion 3122 has a certain elasticity.

[0145] The convex portion 3122 protrudes toward the inside of the clamping cavity, and has a certain elasticity, so that when the connector 31 is in the first position, the convex portion 3122 remains in a deformed state, keeps applying force to the guide tube 4, and improves the stability of clamping.

[0146] Among them, the protrusion 3122 can be an elastic sheet, a rubber gasket and other elastic components, which can provide elastic force to keep the connecting head 31 in the first position state, and apply force to the guide tube 4 to increase the friction between the guide tube 4 and the connecting head 31 when the guide tube 4 is clamped.

[0147] Furthermore, one end of the protrusion 3122 is connected to the inner wall of the clamping tooth 3121, and the other end of the protrusion 3122 is inserted into the clamping cavity and tilted toward the direction close to the limit piece 313, so that an elastic force is applied to the guide tube 4, which can improve the stability of clamping and does not affect the insertion of the guide tube 4 into the clamping cavity. Instead, a certain resistance is formed to the guide tube 4 moving when it is reversely pulled out from the clamping cavity. When the clamping tooth 3121 releases the guide tube 4, the guide tube is not easy to fall out of the connecting head 31.

[0148] In some possible implementation modes provided by the present invention, the connection mode between the connector 31 and the connector base 32 includes at least one of a clamping connection, a snap connection, a threaded connection and a plug-in connection.

[0149] In this embodiment, the plug-in connection between the connector 31 and the connector base 32 is taken as an example. Figure 2As shown, the connector 31 is inserted into the first through hole 321 of the connector base 32 , and the connector 31 is placed in the first position by the elastic member 33 . In specific implementation, the connector 31 is pressed to switch from the first position to the second position.

[0150] In some possible embodiments provided by the present disclosure, the connector 31 and the connector seat 32 are connected by a snap-fit ​​connection; the connector 31 is provided with two groups of protrusions along its own axial direction, and the connector seat 32 is provided with grooves corresponding to the protrusions, and the protrusions at different positions are correspondingly snapped into the grooves to achieve the switching of the connector 31 between the first position and the second position; or, the connector 31 is provided with a protrusion, and the connector seat 32 is provided with two groups of grooves corresponding to the protrusions along its own normal direction, and the protrusions are correspondingly snapped into the grooves at different positions to achieve the switching of the connector 31 between the first position and the second position.

[0151] In some possible embodiments provided by the present disclosure, the connector 31 and the connector seat 32 are connected by a clamping connection; the connector 31 is provided with a clamping member, and the connector seat 32 is provided with two groups of clamping members arranged along its own normal direction, and the connector 31 is switched between the first position and the second position by correspondingly clamping the clamping members on the clamping seats at different positions; the connector 31 is provided with a clamping seat, and the connector seat 32 is provided with two groups of clamping members arranged along its own normal direction, and the connector 31 is switched between the first position and the second position by correspondingly clamping the clamping members on the clamping seats at different positions.

[0152] In some possible embodiments provided by the present disclosure, the connecting head 31 and the connecting seat 32 are threadedly connected, the connecting seat 32 is provided with a first thread, the first thread is arranged on the inner wall of the first through hole 321, and the connecting head 31 is provided with a second thread corresponding to the first thread. The fixing between the connecting head and the connecting seat 32 and the switching of the connecting head 31 between the first position and the second position are achieved by screwing the connecting head 31; or, the fixing of the connecting head 31 and the connecting seat 32 and the switching of the connecting head 31 between the first position and the second position are achieved by bolts.

[0153] Among them, the connection method between the connecting head 31 and the connecting seat 32 can also be a connection method other than clamping connection, snap connection, threaded connection and plug-in connection, which can realize the fixation of the connecting seat 32 and the connecting head 31, and the switching of the connecting head 31 between the first position and the second position.

[0154] In some possible implementation modes provided by the present invention, the connection mode between the connector 31 and the guide tube 4 includes at least one of a clamping connection, a snap connection, a threaded connection and a plug-in connection.

[0155] In this embodiment, the clamping connection between the connector 31 and the guide tube 4 is taken as an example. Figure 3 As shown, the guide tube 4 is inserted into the connector 31 and is clamped by the clamping portion 312. In specific implementation, the connector 31 is pressed to switch from the first position to the second position, thereby achieving connection and separation between the connector 31 and the guide tube 4.

[0156] In some possible embodiments provided by the present disclosure, the connector 31 and the guide tube 4 are connected by a snap-fit ​​connection; a protrusion / groove is provided on the connector 31, and the protrusion / groove corresponding to the guide tube 4 is snap-fitted between the protrusion and the groove, thereby achieving connection and separation between the connector 31 and the guide tube 4.

[0157] In some possible embodiments provided by the present disclosure, the connector 31 and the guide tube 4 are threadedly connected, the guide tube 4 is provided with a first thread, and the connector 31 is provided with a second thread corresponding to the first thread, and the connector 31 and the guide tube 4 are connected and separated by screwing the connector 31 / guide tube 4.

[0158] In some possible embodiments provided by the present disclosure, the connector 31 and the guide tube 4 are connected by a plug-in connection, and an elastic gasket is provided on the inner wall of the connector 31. The guide tube 4 is inserted into the connector 31 and is subjected to pressure from the elastic gasket. The guide tube 4 is inserted into or pulled out of the connector 31, thereby achieving connection and separation between the connector 31 and the guide tube 4.

[0159] Among them, the connection method between the connecting head 31 and the guide tube 4 can also be a connection method other than clamping connection, snap connection, threaded connection and plug-in connection, which can realize the fixation of the connecting seat 32 and the connecting head 31, and the switching of the connecting head 31 between the first position and the second position.

[0160] The embodiment of the second aspect of the present invention further provides a 3D printer 200, comprising the wire conveying device 100 of any one of the above-mentioned first aspects.

[0161] 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 wire conveying 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.

[0162] 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.

[0163] The present application also provides the following implementation modes:

[0164] Embodiment 1: A wire conveying device comprises a feeding device and a discharging channel 7, wherein the feeding device comprises at least two feeding channels 8, wherein a feeding port is provided at one end of the feeding channel 8 and a discharging port is provided at the other end, wherein the feeding port is used for the printing wire to enter, and at least two discharging ports converge in the direction of the discharging channel 7 and are connected with the discharging channel 7, so as to divert the printing wire in the feeding channel 8 to the discharging channel 7.

[0165] Embodiment 2: According to the wire conveying device of embodiment 1, the feeding device comprises:

[0166] A first feeding mechanism 1, the first feeding mechanism 1 comprises a first half shell 81;

[0167] A second feeding mechanism 2, the second feeding mechanism 2 comprises a second half shell 82;

[0168] The material transfer channel 8 includes a cavity defined by a first half shell 81 and a second half shell 82 .

[0169] Embodiment 3: The wire conveying device according to embodiment 2,

[0170] The second feeding mechanism 2 comprises a second feeding body and a shell 5, wherein the second feeding body comprises a second half shell 82, and the shell 5 is used to accommodate the first feeding mechanism 1 and the second feeding body;

[0171] The first feeding mechanism 1 is movably connected to the second feeding body.

[0172] The second feed body is movably connected to the shell 5 ; or, the second feed body is fixedly connected to the shell 5 .

[0173] Embodiment 4: According to the wire conveying device of embodiment 2 or 3, the material transfer channel 8 comprises:

[0174] A straight section 91, one end of which starts from the feed inlet;

[0175] The arc section 92 has one end connected to the straight section 91 and the other end terminated at the discharge port.

[0176] Embodiment 5: According to the wire conveying device of Embodiment 4, the straight section 91 is enclosed by a partial area of ​​the first half shell 81 , and the arc section 92 is enclosed by a partial area of ​​the first half shell 81 and the second half shell 82 .

[0177] Embodiment 6: According to the wire conveying device of embodiment 5, the straight section 91 is closed along the circumferential direction, and the arc section 92 enclosed by the first half shell 81 and the second half shell 82 is closed along the circumferential direction.

[0178] Example 7: According to the wire conveying device of Example 5, the part of the first half shell 81 used to enclose the straight section 91 is arranged inside the first feeding mechanism 1, the part of the first half shell 81 used to cooperate with the second half shell 82 to enclose the arc section 92 is exposed, and the second half shell 82 is arranged on the inner wall of the second feeding mechanism 2.

[0179] Embodiment 8: According to the wire conveying device of Embodiment 4, the straight section 91 is enclosed by a partial area of ​​the first half shell 81 and a partial area of ​​the second half shell 82 , and the arc section 92 is enclosed by a partial area of ​​the first half shell 81 and a partial area of ​​the second half shell 82 .

[0180] Embodiment 9: According to the wire conveying device of Embodiment 8, the straight section 91 enclosed by the first half shell 81 and the second half shell 82 is closed along the circumferential direction, and the arc section 92 enclosed by the first half shell 81 and the second half shell 82 is closed along the circumferential direction.

[0181] Example 10: According to the wire conveying device of Example 8, 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.

[0182] Embodiment 11: According to the wire conveying device of embodiment 2 or 3, the wire conveying device 100 further includes:

[0183] A plurality of guide tubes 4, each of which includes a wire channel, and the wire channel is arranged in one-to-one correspondence with the material passage channel 8;

[0184] The guide connection assembly 3 has one end connected to the guide tube 4 and the other end connected to the first feeding mechanism 1 and / or the second feeding mechanism 2 .

[0185] Embodiment 12: According to the wire conveying device of embodiment 11, the wire conveying device 100 further includes:

[0186] The pipe groove 41 is provided on the first feeding mechanism 1 and is arranged corresponding to the guide pipe 4 , and is used to be connected to one end of the guide pipe 4 .

[0187] Embodiment 13: According to the wire conveying device of embodiment 11, the guide connection assembly 3 comprises:

[0188] A connector 31, one end of which is movably connected to the guide tube 4;

[0189] The connection seat 32 has one end movably connected to the connection head 31 and the other end connected to the first feeding mechanism 1 and / or the second feeding mechanism 2. The connection seat 32 is provided with a first through hole 321 for the guide tube 4 and / or the connection head 31 to pass through.

[0190] Embodiment 14: The wire conveying device according to embodiment 13,

[0191] The connection method between the connector 31 and the connector base 32 includes at least one of a clamping connection, a snap-fit ​​connection, a threaded connection, and a plug-in connection;

[0192] The connection method between the connector 31 and the guide tube 4 includes at least one of a clamping connection, a snap-fit ​​connection, a threaded connection and a plug-in connection.

[0193] Embodiment 15: The wire conveying device according to embodiment 14,

[0194] 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 .

[0195] Embodiment 16: The wire conveying device according to embodiment 13,

[0196] The working position of the connector 31 includes a first position and a second position;

[0197] When the connector 31 moves from the second position to the first position, a portion of the connector 31 is close to the guide tube 4, and when the connector 31 reaches the first position, the guide tube 4 is clamped;

[0198] When the connector 31 moves from the first position to the second position, a portion of the connector 31 is away from the guide tube 4 , and when the connector 31 reaches the second position, the guide tube 4 is released.

[0199] Embodiment 17: According to the wire conveying device of embodiment 16, the connector 31 comprises:

[0200] An annular member 311, on which a second through hole for accommodating the guide tube 4 is formed;

[0201] A clamping portion 312, the clamping portion 312 includes at least two clamping teeth 3121 circumferentially arranged on the annular member 311, one end of the clamping teeth 3121 is relatively fixed to the annular member 311, and the other end of the clamping teeth 3121 is a free end;

[0202] The limiting member 313 is disposed at one end of the clamping tooth 3121 away from the annular member 311 and protrudes outward;

[0203] Among them, the cavity defined by multiple clamping teeth 3121 is a clamping cavity, and the clamping teeth 3121 are elastic so that the free ends of the clamping teeth 3121 can move closer to or away from the guide tube 4 to adjust the inner diameter of one end of the clamping cavity to clamp or release the guide tube 4.

[0204] Embodiment 18: According to the wire conveying device of embodiment 17, the connector 31 further includes:

[0205] The convex portion 3122 is disposed on the inner wall of the clamping tooth 3121 and extends toward the clamping cavity. One end of the convex portion 3122 is connected to the clamping tooth 3121 and the other end extends toward the direction of the limiting member 313. The convex portion 3122 has a certain elasticity.

[0206] Embodiment 19: The wire conveying device according to embodiment 17,

[0207] The outer diameter of the connection end between the clamping portion 312 and the annular member 311 is smaller than the outer diameter of the connection end between the clamping portion 312 and the stopper 313, the outer diameter of the connection end between 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 between the clamping portion 312 and the stopper 313 is smaller than the outer diameter of the stopper 313;

[0208] The inner diameter of the first through hole 321 is larger than the outer diameter of the connection end between the clamping portion 312 and the annular member 311 , and smaller than the outer diameter of the annular member 311 .

[0209] Embodiment 20: According to the wire conveying device of embodiment 19, the guide connection assembly 3 further comprises:

[0210] The elastic member 33 has a first end connected to the connector 31 and a second end relatively fixed to the connector seat 32. The elastic member 33 is used to apply elastic force to the connector 31 so that the connector 31 is in the first position.

[0211] Embodiment 21: A wire conveying device according to embodiment 20,

[0212] The elastic member 33 is at least one of a tension spring, a compression spring, a torsion spring and an elastic sheet.

[0213] Embodiment 22: According to the wire conveying device of embodiment 21, the guide connection assembly 3 further includes:

[0214] The groove 34 is provided on the first feeding mechanism 1 and is arranged corresponding to the elastic member 33 . At least a part of the elastic member 33 is located inside the groove 34 .

[0215] Embodiment 23: The wire conveying device according to embodiment 20,

[0216] When the connector 31 switches between the first position and the second position, the connector seat 32 abuts against the outer wall of the clamping teeth 3121, so that the clamping teeth 3121 are deformed to clamp or release the guide tube 4.

[0217] The inner diameter of the first through hole 321 at one end close to the annular member 311 is larger than the inner diameter of the first through hole 321 at one end close to the stopper 313 , so as to correspond to the outer wall of the clamping portion 312 .

[0218] Embodiment 24: The wire conveying device according to embodiment 23,

[0219] When the connector 31 is in the first position, the connector seat 32 abuts against the limiting member 313;

[0220] When the connecting head 31 is in the second position, the connecting seat 32 abuts against the annular member 311 .

[0221] Embodiment 25: A 3D printer, comprising the wire conveying device 100 of any one of the above embodiments 1-24.

[0222] Embodiment 26, a wire conveying device, comprising a feeding device and a discharging channel 7, the feeding device comprising at least two feeding channels 8, one end of the feeding channel 8 is provided with a feeding port, and the other end is provided with a discharging port, the feeding port is used for the entry of printing wire, at least two discharging ports converge in the direction of the discharging channel 7 and are connected with the discharging channel 7, so as to divert the printing wire in the feeding channel 8 to the discharging channel 7.

[0223] In one implementation, the feeding device comprises:

[0224] A first feeding mechanism 1, the first feeding mechanism 1 comprises a first half shell 81;

[0225] A second feeding mechanism 2, the second feeding mechanism 2 comprises a second half shell 82;

[0226] The material transfer channel 8 includes a cavity defined by a first half shell 81 and a second half shell 82 .

[0227] In another embodiment, the second feeding mechanism 2 includes a second feeding body and a shell 5, the second feeding body includes a second half shell 82, and the shell 5 is used to accommodate the first feeding mechanism 1 and the second feeding body; wherein the first feeding mechanism 1 is movably connected to the second feeding body, and the second feeding body is movably connected to the shell 5; or, the second feeding body is fixedly connected to the shell 5.

[0228] Furthermore, the material transfer channel 8 includes:

[0229] A straight section 91, one end of which starts from the feed inlet;

[0230] The arc section 92 has one end connected to the straight section 91 and the other end terminated at the discharge port.

[0231] In one implementation, the straight section 91 is enclosed by a partial region of the first half shell 81 , and the arc section 92 is enclosed by a partial region of the first half shell 81 and the second half shell 82 .

[0232] Furthermore, the straight section 91 is closed along the circumferential direction, and the arc section 92 enclosed by the first half shell 81 and the second half shell 82 is closed along the circumferential direction.

[0233] Furthermore, the portion of the first half shell 81 used to enclose the straight section 91 is arranged inside the first feeding mechanism 1, the portion of the first half shell 81 used to cooperate with the second half shell 82 to enclose the arc section 92 is exposed, and the second half shell 82 is arranged on the inner wall of the second feeding mechanism 2.

[0234] In another embodiment, the straight section 91 is enclosed by a partial region of the first half shell 81 and a partial region of the second half shell 82 , and the arc section 92 is enclosed by a partial region of the first half shell 81 and a partial region of the second half shell 82 .

[0235] Furthermore, the straight section 91 enclosed by the first half shell 81 and the second half shell 82 is closed along the circumferential direction, and the arc section 92 enclosed by the first half shell 81 and the second half shell 82 is closed along the circumferential direction.

[0236] 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 .

[0237] In one implementation, the wire conveying device 100 further includes:

[0238] A plurality of guide tubes 4, each of which includes a wire channel, and the wire channel is arranged in one-to-one correspondence with the material passage channel 8;

[0239] The guide connection assembly 3 has one end connected to the guide tube 4 and the other end connected to the first feeding mechanism 1 and / or the second feeding mechanism 2 .

[0240] Furthermore, the wire conveying device 100 further includes:

[0241] The pipe groove 41 is provided on the first feeding mechanism 1 and is arranged corresponding to the guide pipe 4 , and is used to be connected to one end of the guide pipe 4 .

[0242] Furthermore, the guide connection component 3 includes:

[0243] A connector 31, one end of which is movably connected to the guide tube 4;

[0244] The connection seat 32 has one end movably connected to the connection head 31 and the other end connected to the first feeding mechanism 1 and / or the second feeding mechanism 2. The connection seat 32 is provided with a first through hole 321 for the guide tube 4 and / or the connection head 31 to pass through.

[0245] Furthermore, the connection method between the connector 31 and the connector seat 32 includes at least one of a clamping connection, a snap connection, a threaded connection and a plug-in connection; the connection method between the connector 31 and the guide tube 4 includes at least one of a clamping connection, a snap connection, a threaded connection and a plug-in connection.

[0246] In one implementation, a buckle 322 is provided on the connecting seat 32 , and a slot 323 corresponding to the buckle 322 is provided on the second feeding mechanism 2 .

[0247] Furthermore, the working position of the connector 31 includes a first position and a second position; when the connector 31 moves from the second position to the first position, a partial area of ​​the connector 31 is close to the guide tube 4, and when the connector 31 reaches the first position, the guide tube 4 is clamped; when the connector 31 moves from the first position to the second position, a partial area of ​​the connector 31 is away from the guide tube 4, and when the connector 31 reaches the second position, the guide tube 4 is released.

[0248] Furthermore, the connector 31 includes:

[0249] An annular member 311, on which a second through hole for accommodating the guide tube 4 is formed;

[0250] A clamping portion 312, the clamping portion 312 includes at least two clamping teeth 3121 circumferentially arranged on the annular member 311, one end of the clamping teeth 3121 is relatively fixed to the annular member 311, and the other end of the clamping teeth 3121 is a free end;

[0251] The limiting member 313 is disposed at one end of the clamping tooth 3121 away from the annular member 311 and protrudes outward;

[0252] Among them, the cavity defined by multiple clamping teeth 3121 is a clamping cavity, and the clamping teeth 3121 are elastic so that the free ends of the clamping teeth 3121 can move closer to or away from the guide tube 4 to adjust the inner diameter of one end of the clamping cavity to clamp or release the guide tube 4.

[0253] Furthermore, the connector 31 also includes a protrusion 3122, which is arranged on the inner wall of the clamping tooth 3121 and extends toward the clamping cavity. One end of the protrusion 3122 is connected to the clamping tooth 3121, and the other end extends toward the direction of the limit member 313. The protrusion 3122 has a certain elasticity.

[0254] Furthermore, the outer diameter of the connection end between the clamping portion 312 and the annular member 311 is smaller than the outer diameter of the connection end between the clamping portion 312 and the limiting member 313, the outer diameter of the connection end between 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 between the clamping portion 312 and the limiting member 313 is smaller than the outer diameter of the limiting member 313; the inner diameter of the first through hole 321 is larger than the outer diameter of the connection end between the clamping portion 312 and the annular member 311, and smaller than the outer diameter of the annular member 311.

[0255] Furthermore, the guide connection assembly 3 also includes an elastic member 33, a first end of the elastic member 33 is connected to the connecting head 31, and a second end of the elastic member 33 is relatively fixed to the connecting seat 32, and the elastic member 33 is used to apply an elastic force to the connecting head 31 so that the connecting head 31 is in the first position.

[0256] Furthermore, the elastic member 33 is at least one of a tension spring, a compression spring, a torsion spring and an elastic sheet.

[0257] Furthermore, the guide connection assembly 3 also includes a groove 34 , which is opened on the first feeding mechanism 1 and is arranged corresponding to the elastic member 33 , and at least a part of the elastic member 33 is located inside the groove 34 .

[0258] Furthermore, during the process of switching the connecting head 31 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 is deformed to clamp or release the guide tube 4; wherein, the inner diameter of the first through hole 321 near the end of the annular member 311 is larger than the inner diameter of the first through hole 321 near the end of the limit member 313, so as to be arranged corresponding to the outer wall of the clamping portion 312.

[0259] Furthermore, when the connector 31 is in the first position, the connector seat 32 abuts against the limiting member 313 ; when the connector 31 is in the second position, the connector seat 32 abuts against the annular member 311 .

[0260] Embodiment 27: A 3D printer, comprising the wire conveying device 100 of the above-mentioned embodiment 26.

[0261] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0262] 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.

[0263] In view of the above detailed description, these and other changes can be made to these embodiments, and this written description includes the best mode embodiments to disclose the utility model. The scope of the patent obtained by the utility model is defined by the claims, and the claims are not limited by the content of the present disclosure. The protection scope of the utility model is not limited thereto. Any technician familiar with the technical field within the scope disclosed by the utility model, according to the technical solution and its concept of the utility model, makes equivalent replacement or change, which is within the protection scope of the utility model.

Claims

1. A wire conveying device, characterized in that: It includes a feeding device and a discharging channel, the feeding device includes at least two feeding channels, one end of the feeding channel is provided with a feeding port, and the other end is provided with a discharging port, the feeding port is used for the printing wire to enter, at least two of the discharging ports converge in the direction of the discharging channel and are connected with the discharging channel, so as to divert the printing wire in the feeding channel to the discharging channel.

2. The wire conveying device according to claim 1, characterized in that: The feeding device comprises: a first feed mechanism, the first feed mechanism comprising a first half shell; a second feed mechanism, the second feed mechanism comprising a second half shell; Wherein, the material transfer channel includes a cavity defined by the first half shell and the second half shell.

3. The wire conveying device according to claim 2, characterized in that: The second feeding mechanism comprises a second feeding body and a shell, the second feeding body comprises the second half shell, and the shell is used to accommodate the first feeding mechanism and the second feeding body; Wherein, the first feeding mechanism is movably connected to the second feeding body, The second feed body is movably connected to the shell; or, the second feed body is fixedly connected to the shell.

4. The wire conveying device according to claim 2 or 3, characterized in that: The material transfer channel comprises: A straight section, one end of which starts from the feed inlet; An arc section, one end of which is connected to the straight section, and the other end of which stops at the discharge port.

5. The wire conveying device according to claim 4, characterized in that: The straight section is formed by a partial region of the first half shell, and the arc section is formed by a partial region of the first half shell and the second half shell.

6. The wire conveying device according to claim 5, characterized in that: The straight section is closed along the circumferential direction, and the arc section enclosed by the first half shell and the second half shell is closed along the circumferential direction.

7. The wire conveying device according to claim 5, characterized in that: The portion of the first half shell used to enclose the straight section is arranged inside the first feeding mechanism, the portion of the first half shell used to cooperate with the second half shell to enclose the arc section is exposed, and the second half shell is arranged on the inner wall of the second feeding mechanism.

8. The wire conveying device according to claim 4, characterized in that: The straight section is enclosed by a partial region of the first half shell and a partial region of the second half shell, and the arc section is enclosed by a partial region of the first half shell and a partial region of the second half shell.

9. The wire conveying device according to claim 8, characterized in that: The straight 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.

10. The wire conveying device according to claim 8, characterized in that: The first half shell is arranged on the outer wall of the first feeding mechanism, and the second half shell is arranged on the inner wall of the second feeding mechanism.

11. The wire conveying device according to claim 2 or 3, characterized in that: The wire conveying device also includes: A plurality of guide tubes, each of which includes a wire channel, and each of the wire channels is arranged in a one-to-one correspondence with the material transfer channel; A guide connection assembly has one end connected to the guide tube and the other end connected to the first feeding mechanism and / or the second feeding mechanism.

12. The wire conveying device according to claim 11, characterized in that: The wire conveying device also includes: A pipe groove is provided on the first feeding mechanism, is arranged corresponding to the guide pipe, and is used to be connected to one end of the guide pipe.

13. The wire conveying device according to claim 11, characterized in that: The guide connection assembly comprises: A connector, one end of which is movably connected to the guide tube; A connecting seat, one end of which is movably connected to the connecting head, and the other end of which is connected to the first feeding mechanism and / or the second feeding mechanism. The connecting seat is provided with a first through hole for the guide tube and / or the connecting head to pass through.

14. The wire conveying device according to claim 13, characterized in that: The connection method between the connector and the connector base includes at least one of a clamping connection, a snap-fit ​​connection, a threaded connection, and a plug-in connection; The connection method between the connector and the guide tube includes at least one of a clamping connection, a snap-fit ​​connection, a threaded connection and a plug-in connection.

15. The wire conveying device according to claim 14, characterized in that: The connecting seat is provided with a buckle, and the second feeding mechanism is provided with a slot corresponding to the buckle.

16. The wire conveying device according to claim 13, characterized in that: The working position of the connector includes a first position and a second position; 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.

17. The wire conveying device according to claim 16, 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; 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 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.

18. The wire conveying device according to claim 17, characterized in that: The connector also includes: The convex portion is arranged on the inner wall of the clamping tooth and extends toward the clamping cavity. One end of the convex portion is connected to the clamping tooth, and the other end extends toward the direction of the limiting member. The convex portion has a certain elasticity.

19. The wire conveying device according to claim 17, characterized in that: The outer diameter of the connection end between the clamping portion and the annular member is smaller than the outer diameter of the connection end between the clamping portion and the limiting member, the outer diameter of the connection end between the clamping portion and the annular member is smaller than the outer diameter of the annular member, and the outer diameter of the connection end between the clamping portion and the limiting member is smaller than the outer diameter of the limiting member; The inner diameter of the first through hole is larger than the outer diameter of the connecting end of the clamping portion and the annular member, and smaller than the outer diameter of the annular member.

20. The wire feeding device according to claim 19, characterized in that: The guide connection assembly also includes: An elastic member, wherein a first end of the elastic member is connected to the connector, a second end of the elastic member is relatively fixed to the connector seat, and the elastic member is used to apply an elastic force to the connector so that the connector is in the first position.

21. The wire conveying device according to claim 20, characterized in that: The elastic member is at least one of a tension spring, a compression spring, a torsion spring and an elastic sheet.

22. The wire conveying device according to claim 21, characterized in that: The guide connection assembly also includes: A groove is provided on the first feeding mechanism and is arranged corresponding to the elastic member, and at least a portion of the elastic member is located inside the groove.

23. The wire feeding device according to claim 20, characterized in that: During the switching of the connector between the first position and the second position, the connector seat abuts against the outer wall of the clamping teeth, so that the clamping teeth are deformed to clamp or release the guide tube; Wherein, the inner diameter of the first through hole at one end close to the annular member is larger than the inner diameter of the first through hole at one end close to the limiting member, so as to be arranged corresponding to the outer wall of the clamping portion.

24. The wire feeding device according to claim 23, characterized in that: When the connector is in the first position, the connector seat abuts against the limiting member; When the connector is in the second position, the connector seat abuts against the annular member.

25. A 3D printer, characterized in that: Comprising a wire conveying device as described in any one of claims 1-24.

Images