Auxiliary wire winding mechanism for desktop-level 3D printer

Abstract

The invention relates to the technical field of 3D printers, in particular to a desktop-level 3D printer auxiliary wire winding mechanism which comprises a main shaft part arranged on the back face of a 3D printer and used for positioning a winding roll; the roundabout movable part is arranged on the back face of the 3D printer, the roundabout movable part is in transmission connection with the main shaft part through a crawler belt, and a thread end of the winding roll penetrates through the roundabout movable part and then enters a printing head; the driving part is arranged on the back face of the 3D printer in a hinged mode, and the driving part is used for driving the winding roll to wind the wire; and the vertical moving part is arranged on the back face of the 3D printer, and the vertical moving part can abut against the driving part. The winding device has the beneficial effects that the driving acting force of the vertical movable part can directly act on the driving part, so that the driving part adjusts the angle to act on the winding work of the winding roll in a friction manner.

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 consumables 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 consumable reel to shake during the reeling process, causing the consumables 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: A main shaft portion, the main shaft portion is arranged on the back of the 3D printer, and the main shaft portion is used to position the cable reel; A circuitous movable part, the circuitous movable part is arranged on the back of the 3D printer, and the circuitous movable part is drivingly connected to the main shaft part through a crawler, and the wire end of the winding reel passes through the circuitous movable part and then enters the printing head; A driving unit, the driving unit is hingedly arranged on the back of the 3D printer, and the driving unit is used to drive the winding reel to reel the wire; A vertical movable part, which is arranged on the back of the 3D printer and can contact the driving part, wherein: The vertical movable part is driven, and the vertical movable part can drive the driving part to contact the winding drum to drive the winding drum and the main shaft part to rotate, so that the main shaft part drives the detour movable part to reciprocate through the crawler belt to drive the wire to be arranged and wound onto the winding drum.

[0005] Further, the main shaft portion includes a fixed shaft arranged on the back of the 3D printer, a tube shaft rotatably arranged on the fixed shaft, a plurality of movable holes circumferentially arranged on the tube shaft, a plurality of support pins inserted into the plurality of movable holes, and a rotating body spirally connected to the inner wall of one end of the tube shaft; The cable reel can be placed outside the tubular shaft, wherein: 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.

[0006] Further, the rotating body includes a spiral shaft arranged in the spiral connection inside the tube shaft, and a cone arranged at one end of the rotating shaft; The cone is capable of contacting a plurality of the support pins.

[0007] 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 the inner bottom surface of the frame body, wherein: By driving the electric cylinder, the frame body can drive the two wear-resistant pads to move up and down, so that the The frame body presses or pulls the driving part to rotate.

[0008] Further, the driving unit includes a connecting rod hingedly arranged on the back of the 3D printer, a roller connected to the connecting rod through a rotating shaft, and a motor connected to the rotating shaft; The motor is used to drive the roller to rotate, wherein The frame body can drive the connecting rod lever to rotate, so that the winding reel is driven to rotate when the roller rotates.

[0009] Furthermore, the circuitous movable part includes a fixed frame arranged on the back of the 3D printer, a support shaft rotatably inserted and connected to the fixed frame, and a movable roller connected to the support shaft; 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: The cable drum can drive the track to rotate through the tube shaft, so that the track drives the support shaft to rotate.

[0010] Further, the circuitous movable portion further comprises a spiral annular groove arranged on the movable roller, a movable frame movably inserted on the fixed frame, a movable column arranged on the movable frame and inserted in the spiral annular groove, and a threading hole arranged on the movable frame, wherein; 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.

[0011] Furthermore, a protective ring is provided on the tube shaft; The front end of the crawler track is in contact with the protective ring and the movable roller.

[0012] Furthermore, the desktop 3D printer auxiliary wire winding mechanism also includes a protection part; The protection part includes a plurality of support frames arranged in a circle on the back of the 3D printer, a plurality of elastic parts arranged at one end of the plurality of support frames, and a protection plate arranged at one end of the plurality of elastic parts; The protective plate includes a curved back plate and two curved vertical plates connected to the curved back plate; The two arc-shaped vertical plates can abut against the cable reel.

[0013] Further, the elastic part includes a first fixing hole arranged on the support frame, a second fixing hole arranged on the support frame, a fixing column inserted in the first fixing hole, a limiting column inserted in the second fixing hole, and a spring arranged outside the fixing column; The other end of the fixing column and the other end of the limiting column are connected to the arc-shaped back plate.

[0014] 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; The present invention is provided with a main shaft part, which can stably hold the wire reel in place, prevent the winding axis of the wire reel from deviating, increase the auxiliary effect on the winding work, balance the winding work, and reduce the friction resistance of the winding work; In addition, the present invention is provided with a circuitous movable part, and the main shaft part transmits the circuitous movable part through the crawler. The circuitous 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 smoothly wound on its outside, which is conducive to the secondary use of the winding drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 is a perspective view of a preferred embodiment of the present invention; Figure 2 It is a three-dimensional view of the main shaft portion of the present invention; Figure 3 It is a schematic diagram of the inner side view of the main shaft portion of the present invention; Figure 4 It is a schematic diagram of the structure of the vertical movable part connected to the driving part of the present invention; Figure 5 is a perspective view of a driving unit of the present invention; Figure 6 It is a three-dimensional diagram of the circuitous active part of the present invention; Figure 7 It is a three-dimensional diagram of the main shaft part connected to the roundabout movable part of the present invention; Figure 8 It is a three-dimensional diagram of the protection part of the present invention.

[0017] In the figure: 1. main shaft; 11. fixed shaft; 12. pipe shaft; 13. movable hole; 14. support pin; 15. rotating body; 151. spiral shaft; 152. cone; 2. back of 3D printer; 3. winding 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 body; 7. crawler; 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

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0019] like Figure 1-8 As shown, the present invention provides a desktop 3D printer auxiliary wire winding mechanism, comprising: A main shaft portion 1, which is disposed on the back side 2 of the 3D printer and is used to position a cable reel 3. The cable reel 3 has a structure that is prior art and will not be further explained; A circuitous movable part 4, wherein the circuitous movable part 4 is arranged on the back side 2 of the 3D printer, and the circuitous movable part 4 is connected to the main shaft part 1 through a crawler belt 7, and the wire end of the wire reel 3 passes through the circuitous movable part 4 and then enters 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 the wire; A vertical movable portion 6 is disposed on the back side 2 of the 3D printer, and the vertical movable portion 6 can contact the driving portion 5, wherein: 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 and drive 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 reciprocate 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 acts on the winding work of the winding drum 3 with friction, 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 a 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 of the winding drum 3, and the present invention is provided with a main shaft part 1, ... The shaft portion 1 can stabilize the cable reel 3 to prevent the cable reel 3 from deviating from the winding axis, increase the auxiliary effect on the winding work, make the winding work balanced, and reduce the friction resistance of the winding work. The cable reel 3 cannot shake or move 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 drives 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 smoothly wound on its outside, which is beneficial to the secondary use of the cable reel 3. The rotation direction of the cable reel 3 determines the order of the forward and backward movement of the roundabout movable part 4, which can assist in winding while also assisting in unwinding, making the use of the 3D printer more convenient.

[0020] Optionally, the spindle portion 1 includes a fixed shaft 11 arranged on the back side 2 of the 3D printer, a tube shaft 12 rotatably arranged on the fixed shaft 11, a plurality of movable holes 13 circumferentially arranged on the tube shaft 12, a plurality of support pins 14 inserted into the plurality of movable holes 13, the movable holes 13 allow the movable track of the support pin 14 to play a limiting role, so that the support pin 14 can only move radially in a limiting track, providing a good preparation for the precise movement of the support pin 14, and a rotating body 15 spirally connected to the inner wall of one end of the tube shaft 12; The cable reel 3 can be sleeved on the outside of the tube shaft 12, wherein: 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, and the positions of the several support pins 14 are adjusted and fixed at 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 the annular 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.

[0021] Optionally, the rotating body 15 includes a spiral shaft 151 disposed in the spiral connection inside the tube shaft 12, and a cone 152 disposed at one end of the rotating shaft; The cone 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 cone 152 is not disturbed. The sharp corner of the cone 152 is close to the support pin 14. The cone 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 hit by the support pin 14.

[0022] Optionally, the vertical movable part 6 includes an electric cylinder 61 disposed on the back side 2 of the 3D printer, a frame body 62 disposed on the telescopic axis of the electric cylinder 61, and two wear-resistant pads disposed on the top surface and the bottom surface of the frame body 62, wherein: Drive the electric cylinder 61, the frame body 62 can drive the two wear-resistant pads to move up and down, so that the 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 to descend, 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 is in conflict with the winding reel 3, which facilitates the driving part 5 to act on the winding reel 3, and also allows the 3D printing work of the winding reel 3 to be unimpeded under normal conditions, allowing its work to be carried out flexibly.

[0023] Optionally, the driving unit 5 includes 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. 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, which meets the necessary conditions for the winding work of the winding drum 3. 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 portion 9, and 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 so that the motor 53 and the electric cylinder 61 can work, thereby intelligently realizing the automatic winding correction work when the wire is loose, and avoiding the knotting caused by the loose wire.

[0024] Optionally, the circuitous movable part 4 includes a fixed frame 41 disposed on the back side 2 of the 3D printer, a support shaft 42 rotatably inserted and connected to 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 pipe shaft 12, wherein: The cable reel 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; The circuitous movable portion 4 further includes a spiral annular groove 44 provided on the movable roller 43, a movable frame 45 movably inserted on the fixed frame 41, a movable column 46 provided on the movable frame 45 and inserted in 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. Specifically, 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, through the transmission work of crawler 7, movable roller 43 and spiral ring groove 44 also rotate synchronously. Spiral ring groove 44 is circuitous. Active roller 43 drives spiral ring groove 44 to rotate half a circle. Active column 46 drives movable frame 45 to move radially once in spiral ring groove 44 under the limiting force of fixed frame 41. Active roller 43 drives spiral ring groove 44 to rotate another half circle. Active frame 45 moves radially once in the opposite direction to the previous direction. In this way, movable frame 45 moves repeatedly. This is the prior art and will not be described in detail here. Threading hole 47 moves repeatedly with movable frame 45, so that the spirally wound wire on winding drum 3 is arranged side by side instead of stacked.

[0025] Optionally, a protective ring 8 is provided on the tube shaft 12; 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 easy to be separated from the original position during the transmission work.

[0026] Optionally, the desktop 3D printer auxiliary wire winding mechanism further includes a protection portion 9; The protection part 9 includes a plurality of support frames 91 arranged in a circle 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 protection plate 93 includes 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 can contact the cable reel 3. Specifically, the process of inserting the cable reel 3 into the tube shaft 12 can squeeze the arc-shaped vertical plates 932. The elastic part 92 is compressed once and then reset, thereby ensuring the arc-shaped vertical plates 932 and the outer edge of the cable reel 3. The loose spiral segments or loop segments of the wire on the cable reel 3 cannot cross the circumferential space of the cable reel 3, which increases the protection effect of the cable reel 3 during unwinding and winding, and avoids disorderly separation of wire segments from the cable reel 3 and affecting 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 cable reel 3 is balanced. At the same time, under the action of the elastic part 92, the rotation operation of the cable reel 3 will not be disturbed.

[0027] 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; 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 be radially expanded and contracted 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 protective effect on the winding reel 3 can be carried out in a benign manner.

[0028] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope 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 the main shaft portion (1) being used to position the cable reel (3); A circuitous movable part (4), the circuitous movable part (4) being arranged on the back side (2) of the 3D printer, and the circuitous movable part (4) being transmission-connected to the main shaft part (1) via a crawler belt (7), and the wire end of the wire reel (3) passes through the circuitous movable part (4) and then enters the printing head; A driving unit (5), the driving unit (5) being hingedly arranged on the back side (2) of the 3D printer, and the driving unit (5) being used to drive the wire reel (3) to reel in the wire; A vertical movable part (6), the vertical movable part (6) being arranged on the back side (2) of the 3D printer, and the vertical movable part (6) being capable of contacting the driving part (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 wire reel (3), thereby driving the wire reel (3) and the main shaft portion (1) to rotate, so that the main shaft portion (1) drives the detour movable portion (4) to reciprocate through the crawler belt (7), thereby driving the wire arrangement and winding onto the wire reel (3).

2. A desktop 3D printer auxiliary wire winding mechanism as claimed in claim 1, characterized in that: The main shaft portion (1) comprises a fixed shaft (11) arranged on the back side (2) of the 3D printer, a tube shaft (12) rotatably arranged on the fixed shaft (11), a plurality of movable holes (13) circumferentially arranged on the tube 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 tube shaft (12); The cable reel (3) can be sleeved on the outside of the tubular shaft (12), wherein: The rotating body (15) is spirally rotated, and the rotating body (15) can push the plurality of supporting pins (14) to spread and move along the plurality of movable holes (13), so that the plurality of supporting pins (14) can position the wire reel (3).

3. A desktop 3D printer auxiliary wire winding mechanism as claimed in claim 2, characterized in that: The rotating body (15) comprises a spiral shaft (151) arranged inside the spirally connected tube shaft (12), and a cone (152) arranged at one end of the rotating shaft; 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 vertical movable part (6) comprises 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: By driving the electric cylinder (61), the frame body (62) can drive the two wear-resistant pads to move upward and downward, so that the The frame body (62) presses or pulls the driving part (5) to rotate.

5. A desktop 3D printer auxiliary wire winding mechanism as claimed in claim 4, characterized in that: 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 when the roller (52) rotates, the winding reel (3) is driven to rotate.

6. A desktop 3D printer auxiliary wire winding mechanism as claimed in claim 5, characterized in that: The detour movable part (4) comprises 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 pipe shaft (12), wherein: The cable reel (3) can drive the crawler belt (7) to rotate via the tube shaft (12), so that the crawler belt (7) drives the support shaft (42) to rotate.

7. A desktop 3D printer auxiliary wire winding mechanism as claimed in claim 6, characterized in that: The circuitous movable portion (4) further comprises a spiral annular groove (44) arranged on the movable roller (43), a movable frame (45) movably inserted on the fixed frame (41), a movable column (46) arranged on the movable frame (45) and inserted in the spiral annular groove (44), and a threading hole (47) arranged 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 vertically and reciprocatingly through the movable column (46), so that the threading hole (47) can move reciprocatingly.

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

9. A desktop 3D printer auxiliary wire winding mechanism as claimed in claim 8, characterized in that: The desktop 3D printer auxiliary wire winding mechanism further includes a protection portion (9); The protection part (9) comprises 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); 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).

10. A desktop 3D printer auxiliary wire winding mechanism as claimed in claim 9, characterized in that: The elastic portion (92) comprises 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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