A desktop 3D printer auxiliary wire winding mechanism

Abstract

The present invention relates to the technical field of 3D printers, and in particular to a desktop-level 3D printer auxiliary wire winding mechanism, comprising: a main shaft portion, the main shaft portion being arranged on the back of the 3D printer, and the main shaft portion being used to position a wire reel; a circuitous movable portion, the circuitous movable portion being arranged on the back of the 3D printer, and the circuitous movable portion being transmission-connected to the main shaft portion via a crawler, and the wire end of the wire reel passing through the circuitous movable portion enters the print head; a driving portion, the driving portion being hingedly arranged on the back of the 3D printer, and the driving portion being used to drive the wire reel to reel in wire; a vertical movable portion, the vertical movable portion being arranged on the back of the 3D printer, and the vertical movable portion being able to contact the driving portion. The beneficial effect of the present invention is that the driving force of the vertical movable portion can directly act on the driving portion, so that the driving portion adjusts the angle and frictionally acts on the reel to reel in wire.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printers, and in particular to an auxiliary wire winding mechanism for a desktop 3D printer. Background Art

[0002] During the operation of the 3D printer, the wire feeding mechanism pulls the wire reel to move, and the wire reel releases the filament during the process. When the wire needs to be changed, the original wire reel must be reeled in. At present, the reeling work of the 3D printer cannot make the wire reel smooth, and the reeling axis is unstable, which makes it easy for the reel to shake during the reeling process, causing the filament to be broken and damaged. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the technical problems in the prior art that the consumables reel is rolled flat and the winding axis is unstable, and to provide a hot melt extrusion device suitable for wrapped printing consumables.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a desktop 3D printer auxiliary wire winding mechanism, comprising:

[0005] A main shaft portion, the main shaft portion is arranged on the back of the 3D printer and is used to position the cable reel;

[0006] A circuitous movable portion, the circuitous movable portion being disposed on the back of the 3D printer and being transmission-connected to the main shaft portion via a crawler belt, so that the wire end of the wire reel passes through the circuitous movable portion and enters the print head;

[0007] A driving unit, the driving unit being hingedly disposed on the back of the 3D printer and configured to drive the wire reel to reel in the wire;

[0008] A vertical movable portion is provided on the back of the 3D printer and is capable of contacting the driving portion, wherein:

[0009] The vertical movable part is driven, and the vertical movable part can drive the driving part to contact the winding drum and drive the winding drum and the main shaft part to rotate, so that the main shaft part drives the detour movable part to move back and forth through the crawler and drives the wire to be wound onto the winding drum.

[0010] Furthermore, the main shaft portion includes a fixed shaft arranged on the back of the 3D printer, a tubular shaft rotatably arranged on the fixed shaft, a plurality of movable holes circumferentially arranged on the tubular shaft, a plurality of support pins inserted into the movable holes, and a rotating body spirally connected to the inner wall of one end of the tubular shaft;

[0011] The cable reel can be placed outside the tubular shaft, wherein

[0012] The rotating body is spirally rotated, and the rotating body can push the plurality of supporting pins to spread and move along the plurality of movable holes, so that the plurality of supporting pins can position the winding reel.

[0013] Furthermore, the rotating body includes a spiral shaft spirally connected to the inside of the tube shaft, and a cone provided at one end of the spiral shaft;

[0014] The cone is capable of contacting a plurality of the support pins.

[0015] Furthermore, the vertical movable part includes an electric cylinder arranged on the back of the 3D printer, a frame body arranged on the telescopic axis of the electric cylinder, and two wear-resistant pads arranged on the top surface and inner bottom surface of the frame body, wherein:

[0016] Drive the electric cylinder, the frame body can drive the two wear-resistant pads to move up and down, so that the

[0017] The frame body presses or pulls the driving part to rotate.

[0018] Furthermore, the driving unit includes a connecting rod hingedly arranged on the back of the 3D printer, a roller connected to the connecting rod via a rotating shaft, and a motor connected to the rotating shaft;

[0019] The motor is used to drive the roller to rotate, wherein

[0020] The frame body can drive the connecting rod lever to rotate, so that the winding reel is driven to rotate when the roller rotates.

[0021] Furthermore, the circuitous movable portion includes a fixed frame arranged on the back of the 3D printer, a support shaft rotatably connected to the fixed frame, and a movable roller connected to the support shaft;

[0022] The inner wall of one end of the crawler is in contact with the support shaft, and the other end of the crawler is in contact with the pipe shaft, wherein:

[0023] The cable drum can drive the crawler belt to rotate through the tubular shaft, so that the crawler belt drives the support shaft to rotate.

[0024] Furthermore, the circuitous movable portion further comprises a spiral annular groove provided on the movable roller, a movable frame movably inserted into the fixed frame, a movable column provided on the movable frame and inserted into the spiral annular groove, and a threading hole provided on the movable frame, wherein;

[0025] When the support shaft rotates, the spiral ring groove can drive the movable frame to move back and forth vertically through the movable column, so that the threading hole can move back and forth.

[0026] Furthermore, a protective ring is provided on the tube shaft;

[0027] The front end of the crawler is in contact with the protective ring and the movable roller.

[0028] Furthermore, the desktop 3D printer auxiliary wire winding mechanism further includes a protective portion;

[0029] The protective part includes a plurality of support frames arranged in a circumferential manner on the back of the 3D printer, a plurality of elastic parts arranged at one end of the plurality of support frames, and a protective plate arranged at one end of the plurality of elastic parts;

[0030] The protective plate includes a curved back plate and two curved vertical plates connected to the curved back plate;

[0031] The two arc-shaped vertical plates can contact the winding drum.

[0032] Furthermore, the elastic portion includes a first fixing hole provided on the support frame, a second fixing hole provided on the support frame, a fixing column inserted into the first fixing hole, a limiting column inserted into the second fixing hole, and a spring provided outside the fixing column;

[0033] The other end of the fixing column and the other end of the limiting column are connected to the arc-shaped back plate.

[0034] The beneficial effect of the present invention is that the driving force of the vertical movable part can directly act on the driving part, so that the driving part adjusts the angle and acts on the winding work of the winding reel with friction, so that the winding work of the winding reel can be carried out in a targeted and flexible manner;

[0035] The present invention is provided with a main shaft portion, which can stably hold the winding reel in place, prevent the winding axis of the winding reel from deviating, increase the auxiliary effect on the winding work, make the winding work balanced, and reduce the friction resistance of the winding work;

[0036] In addition, the present invention is provided with a roundabout movable part, and the main shaft part drives the roundabout movable part through the crawler. The roundabout movable part can drive the wire to move back and forth repeatedly to cooperate with the winding work of the winding drum so that the wire can be wound flatly on its outside, which is conducive to the secondary use of the winding drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below with reference to the accompanying drawings and examples.

[0038] Figure 1 is a perspective view of a preferred embodiment of the present invention;

[0039] Figure 2 It is a three-dimensional view of the main shaft portion of the present invention;

[0040] Figure 3It is a schematic diagram of the inner side view of the main shaft portion of the present invention;

[0041] Figure 4 This is a schematic diagram of the structure of the vertical movable part connected to the driving part of the present invention;

[0042] Figure 5 is a perspective view of a driving portion of the present invention;

[0043] Figure 6 is a three-dimensional diagram of the circuitous movable portion of the present invention;

[0044] Figure 7 This is a three-dimensional diagram of the main shaft portion connected to the circuitous movable portion of the present invention;

[0045] Figure 8 It is a three-dimensional diagram of the protection part of the present invention.

[0046] In the figure: 1. Main shaft; 11. Fixed shaft; 12. Tube shaft; 13. Movable hole; 14. Support pin; 15. Rotating body; 151. Screw shaft; 152. Conical body; 2. Back of 3D printer; 3. Cable reel; 4. Circuitous movable part; 41. Fixed frame; 42. Support shaft; 43. Movable roller; 44. Spiral ring groove; 45. Movable frame; 46. Movable column; 47. Threading hole; 5. Driving part; 51. Connecting rod; 52. Roller; 53. Motor; 6. Vertical movable part; 61. Electric cylinder; 62. Frame; 7. Track; 8. Protective ring; 9. Protective part; 91. Support frame; 92. Elastic part; 93. Protective plate; 931. Arc back plate; 932. Arc vertical plate; 94. Fixed column; 95. Limit column; 96. Spring. DETAILED DESCRIPTION

[0047] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0048] like Figure 1-8 As shown, the present invention provides a desktop 3D printer auxiliary wire winding mechanism, comprising:

[0049] The main shaft portion 1 is provided on the back side 2 of the 3D printer and is used to position the cable reel 3. The cable reel 3 has a structure that is conventional and will not be further explained here.

[0050] A circuitous movable portion 4 is provided on the back side 2 of the 3D printer and is connected to the main shaft portion 1 via a crawler belt 7. The wire end of the wire reel 3 passes through the circuitous movable portion 4 and then enters the print head.

[0051] A driving unit 5 is hingedly mounted on the back side 2 of the 3D printer and is used to drive the wire reel 3 to reel in the wire;

[0052] The vertical movable portion 6 is provided on the back side 2 of the 3D printer, and the vertical movable portion 6 can contact the driving portion 5, wherein:

[0053] The vertical movable part 6 is driven, and the vertical movable part 6 can drive the driving part 5 to contact the winding drum 3, driving the winding drum 3 and the main shaft part 1 to rotate, so that the main shaft part 1 drives the detour movable part 4 to move back and forth through the crawler 7 to drive the wire arrangement to be wound onto the winding drum 3. Specifically, the beneficial effect of the present invention is that the driving force of the vertical movable part 6 can directly act on the driving part 5, so that the driving part 5 adjusts the angle and frictionally acts on the winding work of the winding drum 3, so that the winding work of the winding drum 3 can be carried out in a targeted and flexible manner. During this process, the driving part 5 rotates its lever, changing from a state away from the winding drum 3 to a state of contacting the winding drum 3, thereby providing a winding force for the winding drum 3, and the present invention is provided with a main shaft part 1, a main shaft part 1, a main shaft part 1, a main shaft part 1 The shaft portion 1 can stably position the cable reel 3 to prevent the cable reel 3 from deviating from the winding axis, thereby adding an auxiliary effect to the winding work, making the winding work balanced, and reducing the friction resistance of the winding work. The cable reel 3 cannot shake or displace during the winding process, which provides a guarantee for the neatness of the winding work. In addition, the present invention is provided with a roundabout movable part 4, and the main shaft portion 1 transmits the roundabout movable part 4 through the crawler 7. The roundabout movable part 4 can drive the wire to move back and forth repeatedly to cooperate with the winding work of the cable reel 3 so that the wire can be wound flatly on its outside, which is conducive to the secondary use of the cable reel 3. The rotation direction of the cable reel 3 determines the order in which the roundabout movable part 4 moves back and forth. While assisting in winding, it can also assist in unwinding, making the use of the 3D printer more convenient.

[0054] Optionally, the main shaft portion 1 includes a fixed shaft 11 provided on the back side 2 of the 3D printer, a tubular shaft 12 rotatably provided on the fixed shaft 11, a plurality of movable holes 13 circumferentially provided on the tubular shaft 12, a plurality of support pins 14 inserted into the plurality of movable holes 13, wherein the movable holes 13 limit the movable trajectory of the support pins 14, so that the support pins 14 can only move radially within a limited trajectory, providing a good preparation for the precise movement of the support pins 14, and a rotating body 15 spirally connected to the inner wall of one end of the tubular shaft 12;

[0055] The cable reel 3 can be placed outside the tube shaft 12, wherein:

[0056] The rotating body 15 is spirally rotated, and the rotating body 15 can push the several support pins 14 to spread and move along the several movable holes 13, so that the several support pins 14 can position the cable reel 3. Specifically, the tube shaft 12 and the fixed shaft 11 are coaxial and can rotate on the fixed shaft 11 without any other movement. During the installation process, the cable reel 3 is sleeved on the outside of the tube shaft 12 and the several support pins 14. The positions of the several support pins 14 are adjusted and fixed in the adjusted positions through the spiral rotation of the rotating body 15, so that the inner wall of the cable reel 3 is subjected to a ring-shaped support and positioning effect, which is beneficial to the concentration of the positioning force of the cable reel 3 and avoids the cable reel 3 from deviating toward a certain position and angle of the tube shaft 12. The installation movable surface of the support pin 14 facing the cable reel 3 is an inclined surface, which is beneficial to the guiding and buffering effect during the installation of the cable reel 3 to the tube shaft 12.

[0057] Optionally, the rotating body 15 includes a spiral shaft 151 spirally connected to the inside of the tube shaft 12, and a cone 152 provided at one end of the spiral shaft 151;

[0058] The conical body 152 can contact several of the support pins 14. Specifically, the length of the spiral shaft 151 is greater than the length of the internal thread inside the tube shaft 12, ensuring that the spiral movement of the spiral shaft 151 and the conical body 152 is not interfered with. The sharp corner of the conical body 152 is close to the support pin 14. The conical body 152 allows the diffusion movement process of several support pins 14 to proceed stably based on the movement process of the spiral shaft 151, thereby preventing the winding reel 3 from being collided with the support pin 14.

[0059] Optionally, the vertical movable portion 6 includes an electric cylinder 61 provided on the back side 2 of the 3D printer, a frame body 62 provided on the telescopic axis of the electric cylinder 61, and two wear-resistant pads provided on the top and bottom surfaces of the frame body 62, wherein:

[0060] Drive the electric cylinder 61, the frame body 62 can drive the two wear-resistant pads to move up and down, so that the

[0061] The frame body 62 presses or pulls the driving part 5 to rotate. Specifically, the wear-resistant pad can reduce the friction between the frame body 62 and the driving part 5, and extend the service life of the two contact parts. In the initial state, the driving part 5 is in conflict with the top surface inside the frame body 62, and the electric cylinder 61 starts to extend. The frame body 62 is forced to drive the wear-resistant pad down, so that the driving part 5 is pressed and the angle is changed. The angle of the driving part 5 becomes an upward angle and counteracts the winding reel 3, which facilitates the driving part 5 to act on the winding reel 3, and also allows the winding reel 3 to cooperate with the 3D printing work under normal conditions without obstruction, allowing its work to be carried out flexibly.

[0062] Optionally, the driving unit 5 includes a connecting rod 51 hingedly provided on the back side 2 of the 3D printer, a roller 52 connected to the connecting rod 51 via a rotating shaft, and a motor 53 connected to the rotating shaft;

[0063] The motor 53 is used to drive the roller 52 to rotate, wherein

[0064] The frame body 62 can drive the lever of the connecting rod 51 to rotate, so that the winding drum 3 is driven to rotate when the roller 52 rotates. Specifically, the motor 53 and the roller 52 are located at one end of the connecting rod 51, so that the connecting rod 51 is loaded at one end away from the frame body 62, thereby ensuring the interference effect between the other end of the connecting rod 51 and the frame body 62. The motor 53 drives the roller 52 to roll through the rotating shaft, and the friction force of the roller 52 drives the winding drum 3 to rotate, meeting the necessary conditions for the winding work of the winding drum 3;

[0065] In one embodiment, a sensor and an electrically connected controller are also provided, and the controller is electrically connected to the motor 53 and the electric cylinder 61. The sensor is provided on the protective part 9. The sensor is a proximity sensor or a contact sensor. When the wire on the winding reel 3 is loose, the sensor can be triggered so that the sensor drives the controller to work and thus the motor 53 and the electric cylinder 61 to work, thereby intelligently realizing the automatic winding correction work when the wire is loose, and avoiding the knotting caused by the loose wire.

[0066] Optionally, the circuitous movable portion 4 includes a fixed frame 41 provided on the back side 2 of the 3D printer, a support shaft 42 rotatably connected to the fixed frame 41 , and a movable roller 43 connected to the support shaft 42 ;

[0067] The inner wall of one end of the crawler 7 is in contact with the support shaft 42, and the other end of the crawler 7 is in contact with the pipe shaft 12, wherein:

[0068] The cable drum 3 can drive the track 7 to rotate through the tube shaft 12, so that the track 7 drives the support shaft 42 to rotate;

[0069] The circuitous movable portion 4 further includes a spiral annular groove 44 provided on the movable roller 43, a movable frame 45 movably inserted into the fixed frame 41, a movable column 46 provided on the movable frame 45 and inserted into the spiral annular groove 44, and a threading hole 47 provided on the movable frame 45, wherein;

[0070] When the support shaft 42 rotates, the spiral ring groove 44 can drive the movable frame 45 to move back and forth vertically through the movable column 46, so that the threading hole 47 can move back and forth. Specifically,

[0071] The tube shaft 12, movable roller 43 and crawler 7 are all provided with anti-skid tooth patterns, which ensure the connection effect of crawler 7 with tube shaft 12 and movable roller 43, so that the transmission work is not disturbed. During the rotation process of support shaft 42, tube shaft 12 and winding drum 3, the movable roller 43 and spiral ring groove 44 also rotate synchronously through the transmission work of crawler 7. The spiral ring groove 44 is circuitous. The movable roller 43 drives the spiral ring groove 44 to rotate half a circle. The movable column 46 drives the movable frame 45 to move radially once in the spiral ring groove 44 under the limiting force of the fixed frame 41. The movable roller 43 drives the spiral ring groove 44 to rotate another half circle. The movable frame 45 moves radially in the opposite direction to the previous direction. In this way, the movable frame 45 moves repeatedly. This is the existing technology and will not be described in detail here. The threading hole 47 moves repeatedly with the movable frame 45, so that the spirally wound wire on the winding drum 3 is arranged side by side instead of stacking.

[0072] Optionally, a protective ring 8 is provided on the tube shaft 12;

[0073] The front end of the crawler belt 7 is in contact with the protective ring 8 and the movable roller 43. Specifically, the rear end of the crawler belt 7 is in contact with the fixing frame 41, so that the crawler belt 7 is not easily separated from the original position during the transmission work.

[0074] Optionally, the desktop 3D printer auxiliary wire winding mechanism further includes a protective portion 9;

[0075] The protection part 9 includes a plurality of support frames 91 arranged in a circular shape on the back side 2 of the 3D printer, a plurality of elastic parts 92 arranged at one end of the plurality of support frames 91, and a protection plate 93 arranged at one end of the plurality of elastic parts 92;

[0076] The protective plate 93 includes a curved back plate 931 and two curved vertical plates 932 connected to the curved back plate 931;

[0077] The two arc-shaped vertical plates 932 can contact the winding drum 3. Specifically, the process of inserting the winding drum 3 into the tube shaft 12 can squeeze the arc-shaped vertical plates 932, and the elastic part 92 performs a compression and then reset operation, thereby ensuring the arc-shaped vertical plates 932 and the outer edge of the winding drum 3. The loose spiral segments or loop segments of the wire on the winding drum 3 cannot cross the circumferential space of the winding drum 3, which increases the protection effect of the winding drum 3 during unwinding and winding, and avoids the disorderly separation of wire segments from the winding drum 3 and affecting the subsequent sorting work. The arc-shaped vertical plates 932 and the arc-shaped back plate 931 are coaxial with the tube shaft 12, so that the force state of each point on the circumferential trajectory of the winding drum 3 is balanced. At the same time, under the action of the elastic part 92, the rotation operation of the winding drum 3 will not be disturbed.

[0078] Optionally, the elastic portion 92 includes a first fixing hole provided on the support frame 91, a second fixing hole provided on the support frame 91, a fixing column 94 inserted into the first fixing hole, a limiting column 95 inserted into the second fixing hole, and a spring 96 provided outside the fixing column 94;

[0079] The other end of the fixing column 94 and the other end of the limiting column 95 are connected to the arc-shaped back plate 931. Specifically, the first fixing hole provides an accommodating space for the radial movement process of the fixing column 94, and the second fixing hole provides an accommodating space for the radial movement process of the limiting column 95, so that the spring 96 can radially expand and contract based on this limiting condition without swinging in all directions, thereby allowing the arc-shaped back plate 931 to maintain a fixed expansion and contraction trajectory, so that the protection effect on the cable reel 3 is carried out in a good manner.

[0080] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A desktop 3D printer auxiliary wire winding mechanism, comprising: A main shaft portion (1), the main shaft portion (1) being arranged on the back side (2) of the 3D printer and being used for positioning the cable reel (3); A circuitous movable portion (4), the circuitous movable portion (4) being arranged on the back side (2) of the 3D printer, and the circuitous movable portion (4) being transmission-connected to the main shaft portion (1) via a crawler belt (7), and the thread end of the wire reel (3) passing through the circuitous movable portion (4) and then entering the printing head; A driving unit (5), the driving unit (5) is hingedly arranged on the back side (2) of the 3D printer, and the driving unit (5) is used to drive the winding reel (3) to reel in the wire; A vertical movable portion (6), the vertical movable portion (6) being arranged on the back side (2) of the 3D printer, and the vertical movable portion (6) being capable of contacting the driving portion (5), wherein: The vertical movable portion (6) is driven, and the vertical movable portion (6) is capable of driving the driving portion (5) to contact the winding drum (3) to drive the winding drum (3) and the main shaft portion (1) to rotate, so that the main shaft portion (1) drives the circuitous movable portion (4) through the crawler (7) to reciprocate and drive the wire to be wound onto the winding drum (3); The vertical movable portion (6) includes an electric cylinder (61) arranged on the back side (2) of the 3D printer, a frame body (62) arranged on the telescopic axis of the electric cylinder (61), and two wear-resistant pads arranged on the top surface and the bottom surface of the frame body (62), wherein: The electric cylinder (61) is driven, and the frame body (62) can drive the two wear-resistant pads to move upward and downward, so that the frame body (62) presses or pulls the driving part (5) to rotate; The driving unit (5) comprises a connecting rod (51) hingedly arranged on the back side (2) of the 3D printer, a roller (52) connected to the connecting rod (51) via a rotating shaft, and a motor (53) connected to the rotating shaft; The motor (53) is used to drive the roller (52) to rotate, wherein The frame body (62) can drive the lever of the connecting rod (51) to rotate, so that the winding reel (3) is driven to rotate when the roller (52) rotates; The desktop 3D printer auxiliary wire winding mechanism further includes a protective portion (9), a sensor, and an electrically connected controller, wherein the controller is electrically connected to the motor (53) and the electric cylinder (61), and the sensor is arranged on the protective portion (9), and the sensor can be triggered when the wire on the winding reel (3) is loose; The protection part (9) includes a plurality of support frames (91) arranged in a circumferential manner on the back side (2) of the 3D printer, a plurality of elastic parts (92) arranged at one end of the plurality of support frames (91), and a protection plate (93) arranged at one end of the plurality of elastic parts (92); The protective plate (93) comprises a curved back plate (931) and two curved vertical plates (932) connected to the curved back plate (931); The two arc-shaped vertical plates (932) are capable of contacting the cable reel (3).

2. A desktop 3D printer auxiliary wire winding mechanism according to claim 1, characterized in that: The main shaft portion (1) includes a fixed shaft (11) arranged on the back side (2) of the 3D printer, a tubular shaft (12) rotatably arranged on the fixed shaft (11), a plurality of movable holes (13) circumferentially arranged on the tubular shaft (12), a plurality of support pins (14) inserted into the plurality of movable holes (13), and a rotating body (15) spirally connected to the inner wall of one end of the tubular shaft (12); The cable reel (3) can be placed outside the tubular shaft (12), wherein: The rotating body (15) is spirally rotated, and the rotating body (15) can push the plurality of support pins (14) to spread along the plurality of movable holes (13), so that the plurality of support pins (14) can position the winding drum (3).

3. The desktop 3D printer auxiliary wire winding mechanism according to claim 2, characterized in that: The rotating body (15) includes a spiral shaft (151) spirally connected to the inside of the tube shaft (12), and a cone (152) arranged at one end of the spiral shaft (151); The cone (152) is capable of contacting a plurality of the support pins (14).

4. A desktop 3D printer auxiliary wire winding mechanism as claimed in claim 3, characterized in that: The circuitous movable portion (4) includes a fixed frame (41) arranged on the back side (2) of the 3D printer, a support shaft (42) rotatably connected to and inserted into the fixed frame (41), and a movable roller (43) connected to the support shaft (42); The inner wall of one end of the crawler (7) is in contact with the support shaft (42), and the other end of the crawler (7) is in contact with the tubular shaft (12), wherein: The wire reel (3) can drive the crawler (7) to rotate via the tube shaft (12), so that the crawler (7) drives the support shaft (42) to rotate.

5. The desktop 3D printer auxiliary wire winding mechanism according to claim 4, characterized in that: The circuitous movable portion (4) further includes a spiral annular groove (44) provided on the movable roller (43), a movable frame (45) movably inserted into the fixed frame (41), a movable column (46) provided on the movable frame (45) and inserted into the spiral annular groove (44), and a threading hole (47) provided on the movable frame (45), wherein; When the support shaft (42) rotates, the spiral ring groove (44) can drive the movable frame (45) to move back and forth vertically through the movable column (46), so that the threading hole (47) can move back and forth.

6. The desktop 3D printer auxiliary wire winding mechanism according to claim 5, characterized in that: A protective ring (8) is provided on the tubular shaft (12); The front end of the crawler belt (7) is in contact with the protective ring (8) and the movable roller (43).

7. The desktop 3D printer auxiliary wire winding mechanism according to claim 1, characterized in that: The elastic portion (92) includes a first fixing hole provided on the support frame (91), a second fixing hole provided on the support frame (91), a fixing column (94) inserted into the first fixing hole, a limiting column (95) inserted into the second fixing hole, and a spring (96) provided outside the fixing column (94); The other end of the fixing column (94) and the other end of the limiting column (95) are connected to the arc-shaped back plate (931).

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