CN112590210A

CN112590210A - Hand-held type scald preventing prevents blockking up 3D printing device

Info

Publication number: CN112590210A
Application number: CN202011503972.4A
Authority: CN
Inventors: 秦旭名
Original assignee: Yiwu Luran Trade Co ltd
Current assignee: Yiwu Luran Trade Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-04-02

Abstract

The invention discloses a handheld anti-scald and anti-blocking 3D printing device which comprises a transmission box body, wherein a transmission device is arranged in the transmission box body, the transmission device comprises a transmission cavity positioned in the transmission box body, a motor is fixedly arranged on the inner wall of the right side of the transmission cavity, a feeding pipe is arranged on the upper side of the transmission cavity in a penetrating mode, and a heating pipe is arranged on the lower side of the transmission cavity in a penetrating mode.

Description

Hand-held type scald preventing prevents blockking up 3D printing device

Technical Field

The invention relates to the field of 3D printing, in particular to a handheld anti-scald and anti-blocking 3D printing device.

Background

3D printing, which is one of the rapid prototyping technologies, is also called additive manufacturing, which is a technology for constructing an object by using an adhesive material such as powdered metal or plastic and the like, and by printing layer by layer, based on a digital model file.

The existing handheld 3D printing equipment is simple to operate and easy to use, materials are easy to clamp, and a user is injured in the aspect of body due to the fact that the user is scalded when the heating temperature is too high.

Disclosure of Invention

The technical problem is as follows:

design the hand-held type 3D printing device of anti-sticking material, prevent simultaneously that the user from scalding.

In order to solve the problems, the handheld anti-scald anti-blocking 3D printing device comprises a transmission box body, wherein a transmission device is arranged in the transmission box body, the transmission device comprises a transmission cavity located in the transmission box body, a motor is fixedly arranged on the inner wall of the right side of the transmission cavity, a feeding pipe is arranged on the upper side of the transmission cavity in a penetrating mode, a heating pipe is arranged on the lower side of the transmission cavity in a penetrating mode, a top fixing plate fixedly connected with the feeding pipe is fixedly arranged on the upper side of the transmission box body, a feeding device is arranged on the upper side of the top fixing plate and comprises feeding fixing blocks which are symmetrical in the front and back direction and fixedly arranged on the top fixing plate, a feeding rotating shaft is rotatably connected between the feeding fixing blocks and is slidably connected with a feeding roller wheel, a feeding baffle which is symmetrical in the front and back, The printing material is connected with the inside of the heating pipe in a penetrating and sliding manner, a heating fixed block is fixedly arranged on the lower side of the transmission box body, a heating device is arranged in the heating fixed block, the heating device comprises a heating sliding cavity which is positioned in the heating fixed block and is in bilateral symmetry with the heating pipe, a heating slider is connected in the heating sliding cavity in a sliding manner, the heating slider is close to the heating pipe side and is fixedly provided with a heating block, a heating electric heating wire is fixedly arranged in the heating block, the upper side of the heating slider is provided with a left-right through outlet pipe, the inside of the outlet pipe is fixedly provided with a gas outlet check valve which is used for leading gas to be far away from the heating pipe side to be close to the heating pipe side, the lower side of the heating slider is provided with a left-right through inlet pipe, and the inside, the lower side of the heating fixed block is provided with a material blocking prevention and heat insulation device, the material blocking prevention and heat insulation device comprises a heat supplementing block fixedly arranged on the lower side of the heating fixed block, a heat supplementing fan which is bilaterally symmetrical relative to the printing material is fixedly arranged in the heat supplementing block, the heat supplementing fan is fixedly provided with a heat supplementing block close to the printing material side, a heat supplementing heating wire is fixedly arranged in the heat supplementing block, the heat supplementing heating wire is provided with a heat supplementing air pipe close to the printing material side, the lower side of the heat supplementing block is fixedly provided with a pen point fixed block, the lower side of the pen point fixed block is provided with a pen point sliding groove with a downward opening, a pen point sliding block is connected in the pen point sliding groove in a sliding manner, a pen point spring is fixedly arranged between the pen point sliding block and the pen point sliding groove, a pen point sliding cavity is arranged between the pen point and the pen point fixed block, the side of the stop block air pipe is connected with a stop block in a sliding mode, a stop block spring is fixedly arranged between the stop block and the stop block air pipe, and the heat supplementing air pipe is close to the printing material side and is provided with a hot air nozzle penetrating through the heating pipe.

Wherein the transmission device further comprises a motor shaft in power connection with the motor, a first driving pulley shaft in rotary connection with the transmission cavity is arranged on the left side of the motor shaft, the motor shaft and the first driving pulley shaft are in transmission through a gear pair, a first driving gear shaft in rotary connection with the transmission cavity is arranged on the left side of the first driving pulley shaft, the first driving gear shaft and the first driving pulley shaft are in transmission through the gear pair, the first driving gear shaft and the printing material are in transmission through a friction wheel, a first driven gear shaft in rotary connection with the transmission cavity is arranged on the left side of the printing material, the first driven gear shaft and the printing material are in transmission through the friction wheel, a first driven pulley shaft in rotary connection with the transmission cavity is arranged on the left side of the first driven gear shaft, and the first driven pulley shaft and the first driven gear shaft are in transmission through the gear pair, the first driven pulley shaft and the first driving pulley shaft are in transmission through a pulley pair, a second driving gear shaft which is in rotary connection with the transmission cavity is arranged on the upper side of the first driving gear shaft, the second driving gear shaft is in transmission with the first driving gear shaft through the pulley pair, the second driving gear shaft is in transmission with the printing material through a friction wheel, a second driving pulley shaft which is in rotary connection with the transmission cavity is arranged on the right side of the second driving gear shaft, the second driving pulley shaft is in transmission with the second driving gear shaft through the gear pair, a second driven gear shaft which is in rotary connection with the transmission cavity is arranged on the left side of the printing material, the second driven gear shaft is in transmission with the printing material through the friction wheel, a second driven pulley shaft which is in rotary connection with the transmission cavity is arranged on the left side of the second driven gear shaft, and the second driven gear shaft is in transmission with the second driven gear shaft through the gear pair, the second driven pulley shaft and the second driving pulley shaft are in transmission through a pulley pair.

The feeding device further comprises a positioning block which is arranged on the upper side of the top fixing plate and is symmetrical to the left side of the printing material, a positioning rotating shaft is connected to the upper side of the positioning block in a rotating mode, and a positioning roller wheel in friction transmission with the printing material is fixedly arranged on the positioning rotating shaft.

The heating device also comprises a heating spring which is fixedly arranged between the heating sliding cavity and the heating sliding block.

Wherein the anti-jamming heat insulation device further comprises a telescopic sliding cavity which is positioned in the top fixing plate and has an opening facing away from the printing material, a telescopic slide rod is connected in the telescopic sliding cavity in a sliding manner, a telescopic sliding plate is fixedly arranged on the side, away from the printing material, of the telescopic slide rod, a hinged shaft is connected to a torsional spring on the side, away from the printing material, of the telescopic sliding plate, a hinged rod is fixedly arranged on the hinged shaft, a sliding plate rotating shaft is connected to a torsional spring on the lower side of the hinged rod, a closed sliding plate is fixedly arranged on the sliding plate rotating shaft, the transmission box body, the heating fixing block and the heat supplementing block are in sliding connection with the side, away from the printing material, of the telescopic sliding plate and are in sliding connection with a pen body, a heat insulation roller is rotatably connected to the upper side of the pen body, a heat insulation roller which is fixedly connected, the body of a pen pivot rotate connect and with the nib fixed block with nib sliding connection has the nib baffle, nib baffle downside just is located the nib baffle is close to printing material side torsional spring is connected with the nib pivot, the nib pivot fixed be equipped with nib fixed connection's nib.

The invention has the beneficial effects that: the handheld 3D printer designed by the invention is relatively portable and simple to operate, the double rollers are adopted for internal transmission, the material clamping can be effectively prevented, the automatic temperature control heating is adopted, the heating temperature can be automatically reduced when the temperature is too high, the discharge port can be automatically secondarily heated when the temperature is detected to be too low, the material clamping condition is effectively prevented, the machine body adopts the anti-scalding protection when the temperature is too high, and the air heat insulation layer is added, so that the scalding can be effectively prevented.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic overall structure diagram of a handheld scald-preventing and blockage-preventing 3D printing device according to the present invention;

FIG. 2 is a schematic view of the structure in the direction "A" of FIG. 1;

FIG. 3 is an enlarged partial schematic view at "B" of FIG. 1;

fig. 4 is a partially enlarged schematic view at "C" of fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-4, wherein for ease of description the orientations described below are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to a handheld anti-scald and anti-clogging 3D printing device, which comprises a transmission box body 19, wherein a transmission device 81 is arranged in the transmission box body 19, the transmission device 81 comprises a transmission cavity 41 positioned in the transmission box body 19, a motor 44 is fixedly arranged on the inner wall of the right side of the transmission cavity 41, a feeding pipe 29 is arranged on the upper side of the transmission cavity 41 in a penetrating manner, a heating pipe 11 is arranged on the lower side of the transmission cavity 41 in a penetrating manner, a top fixing plate 72 fixedly connected with the feeding pipe 29 is fixedly arranged on the upper side of the transmission box body 19, a feeding device 82 is arranged on the upper side of the top fixing plate 72, the feeding device 82 comprises feeding fixing blocks 36 which are longitudinally symmetrical and fixedly arranged with the top fixing plate 72, a feeding rotating shaft 34 is rotatably connected between the feeding fixing blocks 36, the feeding rotating shaft 34 is slidably connected with a feeding roller 35, the feeding roller 35 is wound with a feeding pipe 29, a transmission cavity 41 and a printing material 12 which is connected with the inside of the heating pipe 11 in a penetrating and sliding manner, a heating fixed block 15 is fixedly arranged at the lower side of the transmission box body 19, a heating device 83 is arranged in the heating fixed block 15, the heating device 83 comprises a heating sliding cavity 18 which is positioned in the heating fixed block 15 and is symmetrical to the left and the right of the heating pipe 11, a heating slide block 17 is connected in the heating sliding cavity 18 in a sliding manner, a heating block 50 is fixedly arranged at the side, close to the heating pipe 11, of the heating slide block 17, a heating electric heating wire 51 is fixedly arranged in the heating block 50, a left-right through air outlet pipe 48 is arranged at the upper side of the heating slide block 17, a gas outlet check valve 49 which is far away from the side of the heating pipe 11 to the side, and a left, the air inlet pipe 52 is internally and fixedly provided with an air inlet check valve 53 from the side of the heating pipe 11 to the side far away from the heating pipe 11 when viewed, the lower side of the heating fixed block 15 is provided with an anti-blocking heat insulation device 84, the anti-blocking heat insulation device 84 comprises a heat supplementing block 54 fixedly arranged on the lower side of the heating fixed block 15, the heat supplementing block 54 is internally and fixedly provided with heat supplementing fans 66 which are bilaterally symmetrical relative to the printing material 12, the heat supplementing fans 66 are fixedly provided with heat supplementing blocks 65 close to the side of the printing material 12, the heat supplementing blocks 65 are internally and fixedly provided with heat supplementing electric heating wires 67, the heat supplementing electric heating wires 67 are provided with heat supplementing air pipes 68 close to the side of the printing material 12, the lower side of the heat supplementing block 54 is fixedly provided with a pen head fixed block 62, the lower side of the pen head fixed block 62 is provided with a pen head, the pen point sliding block 57 with be equipped with nib spring 56 between the nib spout 55 fixedly, the fixed nib 58 that is equipped with of nib slider 57 downside, the nib 58 with be equipped with nib sliding chamber 60 between the nib fixed block 62, nib sliding chamber 60 with link up between the concurrent heating trachea 68 and be equipped with dog trachea 61, dog trachea 61 upside sliding connection has dog 64, dog 64 with be equipped with dog spring 63 between the dog trachea 61, concurrent heating trachea 68 is close to printing material 12 side is equipped with the hot gas shower nozzle 69 that runs through heating pipe 11.

According to the embodiment, the transmission device 81 is described in detail below, the transmission device 81 further includes a motor shaft 43 in power connection with the motor 44, a first driving pulley shaft 42 in rotational connection with the transmission cavity 41 is disposed on the left side of the motor shaft 43, the motor shaft 43 and the first driving pulley shaft 42 are in gear pair transmission, a first driving gear shaft 45 in rotational connection with the transmission cavity 41 is disposed on the left side of the first driving pulley shaft 42, the first driving gear shaft 45 and the first driving pulley shaft 42 are in gear pair transmission, the first driving gear shaft 45 and the printing material 12 are in friction wheel transmission, a first driven gear shaft 46 in rotational connection with the transmission cavity 41 is disposed on the left side of the printing material 12, the first driven gear shaft 46 and the printing material 12 are in friction wheel transmission, a first driven pulley shaft 47 in rotational connection with the transmission cavity 41 is disposed on the left side of the first driven gear shaft 46, the first driven pulley shaft 47 and the first driven pulley shaft 46 are in transmission through a gear pair, the first driven pulley shaft 47 and the first driving pulley shaft 42 are in transmission through a pulley pair, the upper side of the first driving gear shaft 45 is provided with a second driving gear shaft 39 rotatably connected with the transmission cavity 41, the second driving gear shaft 39 and the first driving gear shaft 45 are in transmission through a pulley pair, the second driving gear shaft 39 and the printing material 12 are in transmission through a friction wheel, the right side of the second driving gear shaft 39 is provided with a second driving pulley shaft 40 rotatably connected with the transmission cavity 41, the second driving pulley shaft 40 and the second driving gear shaft 39 are in transmission through a gear pair, the left side of the printing material 12 is provided with a second driven gear shaft 38 rotatably connected with the transmission cavity 41, and the second driven gear shaft 38 and the printing material 12 are in transmission through a friction wheel, a second driven pulley shaft 37 rotatably connected with the transmission cavity 41 is arranged on the left side of the second driven gear shaft 38, the second driven pulley shaft 37 and the second driven gear shaft 38 are transmitted through a gear pair, and the second driven pulley shaft 37 and the second driving pulley shaft 40 are transmitted through a pulley pair.

According to an embodiment, the feeding device 82 is described in detail below, the feeding device 82 further includes a positioning block 30 that is fixed on the top of the top fixing plate 72 and is symmetrical about the left side of the printing material 12, the positioning block 30 is rotatably connected to a positioning rotating shaft 31, the positioning rotating shaft 31 is fixedly provided with a positioning roller 32 that is in friction transmission with the printing material 12, and the feeding roller 35 slides on the feeding rotating shaft 34, so that the printing material 12 vertically enters the feeding pipe 29.

According to an embodiment, the heating device 83 is described in detail below, and the heating device 83 further includes a heating spring 16 fixedly disposed between the heating slide cavity 18 and the heating slide block 17.

According to the embodiment, the anti-jamming heat insulation device 84 is described in detail below, the anti-jamming heat insulation device 84 further includes a telescopic sliding cavity 28 located in the top fixing plate 72 and opened toward the side far away from the printing material 12, a telescopic sliding rod 27 is slidably connected in the telescopic sliding cavity 28, a telescopic sliding plate 26 is fixedly arranged on the side of the telescopic sliding rod 27 far away from the printing material 12, a hinge shaft 25 is connected to a torsion spring of the telescopic sliding plate 26 far away from the printing material 12, a hinge rod 22 is fixedly arranged on the hinge shaft 25, a sliding plate rotating shaft 21 is connected to a torsion spring of the lower side of the hinge rod 22, a sealing sliding plate 20 is fixedly arranged on the sliding plate rotating shaft 21, the transmission box 19, the heating fixing block 15, and the heat-compensating block 54 are slidably connected to the side far away from the printing material 12 and are slidably connected to a pen body 14 close to the side of the sealing sliding plate 20, thermal-insulated roller bearing 23 is fixed be equipped with 26 sliding connection's of flexible slide thermal-insulated running

roller

24, 14 downside rotations of a body are connected with a body pivot 13, a body pivot 13 rotate connect and with written fixed block 62 with 58 sliding connection of nib have nib baffle 59, nib baffle 59 downside just is located nib baffle 59 is close to printing material 12 side torsional spring coupling has nib pivot 71, nib pivot 71 is fixed be equipped with 58 fixed connection's nib 70 of nib, seal slide 20 and hug closely because of torsional spring torsion the body 14 works as about the body 14, seal slide 20 and follow about the body 14, drive articulated rod 22 rotates.

The following describes in detail the use steps of the handheld scald-preventing and blockage-preventing 3D printing device in this document with reference to fig. 1 to 4:

initially, the heating spring 16, the nib spring 56, and the stopper air tube 61 are in a relaxed state, and the torsion springs on the slider shaft 21, the hinge shaft 25, and the nib shaft 71 are in a twisted state.

Before use, the heating wire 51 is turned on, after heating for a period of time, the motor 44 is turned on to drive the motor shaft 43 to rotate, the first driving pulley shaft 42 and the first driving gear shaft 45 are driven to rotate by gear pair transmission, the first driving gear shaft 45 drives the second driving gear shaft 39 to rotate by pulley pair transmission, the first driven pulley shaft 47 is driven to rotate by pulley pair transmission, the first driven pulley shaft 47 drives the first driven gear shaft 46 to rotate by gear pair transmission, the first driven gear shaft 46 and the first driving gear shaft 45 drive the printing material 12 to descend by friction gear pair transmission, the second driving gear shaft 39 drives the second driving pulley shaft 40 to rotate by gear pair transmission, the second driving pulley shaft 40 drives the second driven pulley shaft 37 to rotate by pulley pair transmission, the second driven pulley shaft 37 drives the second driven gear shaft 38 to rotate by gear pair transmission, and the second driven gear shaft 38 and the second driving gear shaft 39 drive the printing material 12 to descend by friction gear pair transmission And (5) reducing.

When the printing material 12 passes through, the heating wire 51 heats the printing material 12, if the temperature is too high, the gas on the side of the heating slide block 17 far away from the printing material 12 enters the side of the heating slide block 17 close to the printing material 12, the temperature on the printing material 12 is reduced, if the temperature is insufficient through the pen point fixing block 62, the gas in the pen point chute 55 is compressed, the pen point slide block 57 rises to drive the pen point 58 to move upwards, the gas in the pen point sliding cavity 60 is squeezed into the stop gas pipe 61 to push the stop block 64 to rise, the heat supplementing heating wire 67 and the heat supplementing fan 66 are automatically started, the heat supplementing fan 66 blows the heat of the heat supplementing heating wire 67 to the hot gas nozzle 69 through the heat supplementing gas pipe 68 to heat the printing material 12 for the second time, meanwhile, the pen point baffle 59 moves around the rotating shaft 71 to the side far away from the printing material 12 to drive the pen body 14 to move to the side far, after the hinged rod 22 is rotated to be vertical, if the pen body 14 continues to move to the side far away from the printing material 12, the telescopic sliding plate 26 drives the telescopic sliding rod 27 to move to the side far away from the printing material 12, so that the heat insulation effect is realized.

When the process is finished, the heating spring 16, the pen point spring 56 and the stop air tube 61 are restored to the relaxed state.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a hand-held type scald preventing prevents blockking up 3D printing device, includes transmission box, its characterized in that: the printing device is characterized in that a transmission device is arranged in the transmission box body, the transmission device comprises a transmission cavity in the transmission box body, a motor is fixedly arranged on the inner wall of the right side of the transmission cavity, a feeding pipe is arranged on the upper side of the transmission cavity in a penetrating manner, a heating pipe is arranged on the lower side of the transmission cavity in a penetrating manner, a top fixing plate fixedly connected with the feeding pipe is fixedly arranged on the upper side of the transmission box body, a feeding device is arranged on the upper side of the top fixing plate and comprises feeding fixing blocks which are symmetrical front and back and fixedly arranged on the top fixing plate, a feeding rotating shaft is rotatably connected between the feeding fixing blocks and is slidably connected with feeding rollers, the feeding rollers are fixedly provided with feeding baffle plates which are symmetrical front and back, the feeding rollers are wound with printing materials which are slidably connected with the feeding pipe, the transmission, a heating device is arranged in the heating fixed block, the heating device comprises heating sliding cavities which are positioned in the heating fixed block and are bilaterally symmetrical relative to the heating pipe, a heating slide block is connected in the heating sliding cavities in a sliding manner, the heating slide block is fixedly provided with a heating block close to the heating pipe side, a heating wire is fixedly arranged in the heating block, the upper side of the heating slide block is provided with an air outlet pipe which is communicated from left to right, the air outlet pipe is fixedly provided with an air outlet one-way valve from the side far away from the heating pipe to the side close to the heating pipe, the lower side of the heating slide block is provided with an air inlet pipe which is communicated from left to right, the air inlet pipe is fixedly provided with an air inlet one-way valve from the side far away from the heating pipe when the air is seen, the lower side of the heating fixed block is provided with an anti, the ink-jet printer is characterized in that an ink-supplying fan which is bilaterally symmetrical about the printing material is fixedly arranged in the ink-supplying block, the ink-supplying fan is fixedly provided with an ink-supplying block close to the printing material side, an ink-supplying heating wire is fixedly arranged in the ink-supplying block, an ink-supplying air pipe is arranged close to the printing material side, a pen head fixing block is fixedly arranged at the lower side of the ink-supplying block, a pen head chute with a downward opening is arranged at the lower side of the pen head fixing block, a pen head sliding block is connected in the pen head chute in a sliding manner, a pen head spring is fixedly arranged between the pen head sliding block and the pen head chute, a pen head sliding cavity is arranged between the pen head and the pen head fixing block, a block air pipe is arranged between the pen head sliding cavity and the ink-supplying air pipe in a penetrating manner, a block is connected, and a hot air nozzle penetrating through the heating pipe is arranged on the side, close to the printing material, of the heat supplementing air pipe.

2. The handheld scald-preventing and blockage-preventing 3D printing device as claimed in claim 1, wherein: the transmission device also comprises a motor shaft in power connection with the motor, a first driving pulley shaft in rotary connection with the transmission cavity is arranged on the left side of the motor shaft, the motor shaft and the first driving pulley shaft are in transmission through a gear pair, a first driving gear shaft in rotary connection with the transmission cavity is arranged on the left side of the first driving pulley shaft, the first driving gear shaft and the first driving pulley shaft are in transmission through the gear pair, the first driving gear shaft and the printing material are in transmission through a friction wheel, a first driven gear shaft in rotary connection with the transmission cavity is arranged on the left side of the printing material, the first driven gear shaft and the printing material are in transmission through the friction wheel, a first driven pulley shaft in rotary connection with the transmission cavity is arranged on the left side of the first driven gear shaft, and the first driven pulley shaft and the first driven gear shaft are in transmission through the gear pair, the first driven pulley shaft and the first driving pulley shaft are in transmission through a pulley pair, a second driving gear shaft which is in rotary connection with the transmission cavity is arranged on the upper side of the first driving gear shaft, the second driving gear shaft is in transmission with the first driving gear shaft through the pulley pair, the second driving gear shaft is in transmission with the printing material through a friction wheel, a second driving pulley shaft which is in rotary connection with the transmission cavity is arranged on the right side of the second driving gear shaft, the second driving pulley shaft is in transmission with the second driving gear shaft through the gear pair, a second driven gear shaft which is in rotary connection with the transmission cavity is arranged on the left side of the printing material, the second driven gear shaft is in transmission with the printing material through the friction wheel, a second driven pulley shaft which is in rotary connection with the transmission cavity is arranged on the left side of the second driven gear shaft, and the second driven gear shaft is in transmission with the second driven gear shaft through the gear pair, the second driven pulley shaft and the second driving pulley shaft are in transmission through a pulley pair.

3. The handheld scald-preventing and blockage-preventing 3D printing device as claimed in claim 1, wherein: the feeding device further comprises a positioning block, wherein the positioning block is symmetrically arranged on the left side of the printing material, and the upper side of the positioning block is rotatably connected with a positioning rotating shaft which is fixedly provided with a positioning roller wheel in friction transmission with the printing material.

4. The handheld scald-preventing and blockage-preventing 3D printing device as claimed in claim 1, wherein: the heating device also comprises a heating spring which is fixedly arranged between the heating sliding cavity and the heating sliding block.

5. The handheld scald-preventing and blockage-preventing 3D printing device as claimed in claim 1, wherein: the anti-jamming heat insulation device further comprises a telescopic sliding cavity which is positioned in the top fixing plate and has an opening facing away from the printing material, a telescopic slide rod is connected in the telescopic sliding cavity in a sliding manner, a telescopic sliding plate is fixedly arranged on the side, away from the printing material, of the telescopic slide rod, a hinged shaft is connected to a torsional spring on the side, away from the printing material, of the telescopic sliding plate, a hinged rod is fixedly arranged on the hinged shaft, a slide plate rotating shaft is connected to the torsional spring on the lower side of the hinged rod, a closed sliding plate is fixedly arranged on the slide plate rotating shaft, the transmission box body, the heating fixing block and the heat supplementing block are movably connected with the side, away from the printing material, of the telescopic sliding plate and are slidably connected with a pen body close to the printing material, a heat insulation roller is rotatably connected to the upper side of the pen body, a heat insulation roller, the body of a pen pivot rotate connect and with the nib fixed block with nib sliding connection has the nib baffle, nib baffle downside just is located the nib baffle is close to printing material side torsional spring is connected with the nib pivot, the nib pivot fixed be equipped with nib fixed connection's nib.