阅读说明：本技术 一种具有自理功能的防烫伤3d打印笔 (Scald preventing 3D print pen with self-care function ) 是由 秦旭名 于 2020-12-28 设计创作，主要内容包括：本发明公开的一种具有自理功能的防烫伤3D打印笔,包括笔体和打印头,所述笔体的底面固设有加热头,所述加热头的外周设置有螺纹,所述打印头内设有开口朝上的紧固腔,所述紧固腔的内壁与所述加热头外周能螺纹连接,所述紧固腔底壁固设有定位块,所述定位块和所述打印头内固嵌有上下贯通的打印管,所述加热头内开设有加热腔,所述加热腔内壁固设有加热器,所述加热头内设有开口朝下的定位腔,本发明不仅具备3D打印笔的打印功能,还能通过闭合的封闭罩来有效防止使用者意外接触烫伤的问题发生,并且能够在闭合时自动切断上一次使用的所述耗材末端。(The invention discloses an anti-scald 3D printing pen with a self-care function, which comprises a pen body and a printing head, wherein a heating head is fixedly arranged on the bottom surface of the pen body, threads are arranged on the periphery of the heating head, a fastening cavity with an upward opening is arranged in the printing head, the inner wall of the fastening cavity can be in threaded connection with the periphery of the heating head, a positioning block is fixedly arranged on the bottom wall of the fastening cavity, a printing pipe which is communicated up and down is fixedly embedded in the positioning block and the printing head, a heating cavity is formed in the heating head, a heater is fixedly arranged on the inner wall of the heating cavity, and a positioning cavity with a downward opening is arranged in the heating head.)

1. The utility model provides a scald preventing 3D prints pen with self-care function, includes the handwriting and beats printer head, its characterized in that: the bottom surface of the pen body is fixedly provided with a heating head, the periphery of the heating head is provided with threads, a fastening cavity with an upward opening is arranged in the printing head, the inner wall of the fastening cavity can be in threaded connection with the periphery of the heating head, the bottom wall of the fastening cavity is fixedly provided with a positioning block, the positioning block and the printing head are internally and fixedly provided with a printing tube which is communicated from top to bottom, a heating cavity is arranged in the heating head, the inner wall of the heating cavity is fixedly provided with a heater, a positioning cavity with a downward opening is arranged in the heating head, the positioning block can be inserted into the positioning cavity, a conveying cavity is arranged in the pen body, a flow guide tube is fixedly embedded between the conveying cavity and the positioning cavity and penetrates through the heater, the periphery of the pen body is provided with a protective mechanism which can prevent scalding and can automatically cut off and clean the bottom of the printing head, the pen comprises a pen body, a pen cover, a pen head, a pen tube, a pen holder, a pen body, a pen holder and a pen cover, wherein a hollow cover cavity with an opening facing the pen head is formed in the closed cover, the pen holder can be wrapped in the hollow cover cavity, a telescopic cavity with an opening facing the pen holder is formed in the pen holder, a, the side of the lifting block, which is close to the outside, is hinged with a driven connecting rod, and the driven connecting rod is hinged with the transmission connecting rod in the cavity.

2. The scald-preventing 3D printing pen with the self-care function as claimed in claim 1, wherein: the pen is characterized in that a feeding pipe is fixedly embedded in the inner wall of the upper side of the conveying cavity, the feeding pipe is communicated with the outside, a button cavity with an opening facing left is formed in the pen body, a button is arranged on the inner wall of the button cavity in a sliding mode, a cross post is fixedly arranged on the right side face of the button, a reset spring is fixedly arranged between the right side face of the button and the right wall of the reset spring, a power cavity is arranged on the right side of the button cavity in a communicating mode, a motor is fixedly arranged on the bottom wall of the power cavity, a control switch is electrically connected to the top face of the motor, the right extending portion of the cross post extends into the power cavity, a contact block is fixedly arranged on the right side face of the cross post and can be in contact with the control switch, the motor can be started when the contact block is in contact with the control switch, a motor shaft is dynamically connected to the, the gear chamber is located carry the chamber rear side, the antetheca rotation in gear chamber is equipped with two bilateral symmetry's driven shaft, the periphery of driven shaft has set firmly driven gear, two driven gear intermeshing, the periphery of motor shaft has set firmly drive gear, drive gear with be located the left side driven gear meshes.

3. The scald-preventing 3D printing pen with a self-care function as claimed in claim 2, wherein: the part of the driven shaft extending forwards extends into the conveying cavity, a rotating disk is fixedly arranged on the periphery of the part of the driven shaft extending forwards, eight elastic cavities which are symmetrical with the center of the rotating disk are formed in the rotating disk, clamping blocks are arranged on the inner walls of the elastic cavities in a sliding mode and can be abutted to the consumable, and clamping springs are fixedly arranged between the side face of the clamping block, close to the driven shaft, and the side wall of the elastic cavity, close to the driven shaft.

4. The scald-preventing 3D printing pen with the self-care function as claimed in claim 3, wherein: a lifting screw rod is rotatably arranged between the upper wall and the lower wall of the lifting cavity, the lifting screw rod penetrates through the lifting block and is in threaded connection with the inner wall of the lifting block, a jacking spring is fixedly arranged between the top surface of the lifting block and the top wall of the lifting cavity, a transmission cavity is formed in the upper side of the lifting cavity, a spline housing is rotatably arranged on the bottom wall of the transmission cavity, a spline shaft is fixedly arranged on the top surface of the lifting screw rod, the spline shaft penetrates through the spline housing and is rotatably connected with the top wall of the transmission cavity, the spline shaft is in splined connection with the spline housing, a rotary gear is fixedly arranged on the periphery of the spline housing, a fixed box is fixedly arranged on the periphery of the pen body, an annular cavity is arranged in the fixed box, an annular inner toothed ring is rotatably arranged on the inner wall of the annular cavity, the annular cavity is communicated with the transmission, and with the meshing of ring gear in the annular is located the left side the upside in transmission chamber has been seted up and has been connected the chamber, the diapire rotation of connecting the chamber is equipped with vertical axis, the periphery of vertical axis has set firmly connecting gear, connect the chamber with the annular chamber intercommunication, connecting gear extension stretches into in the annular chamber, and with the meshing of ring gear in the annular, vertical axis upwards extension stretches into the button intracavity, and its top surface has set firmly the power gear, the solid embedding has the rack in the downside inner wall of button, the rack with the meshing of power gear.

5. The scald-preventing 3D printing pen with the self-care function as claimed in claim 4, wherein: the cutting block is far away from the side face of the bottom of the printing head and the telescopic cavity is far away from a telescopic spring fixedly arranged between the side walls of the printing head.

6. The scald-preventing 3D printing pen with the self-care function as claimed in claim 5, wherein: carry the front side in chamber to open and be equipped with the rectangle chamber, the inner wall in rectangle chamber has set firmly the control electroplax, the heater with control electroplax electric connection, display screen and keypad have been embedded in the front side inner wall of handwriting, the display screen with the keypad with control electroplax electric connection.

Technical Field

The invention relates to the field of 3D printing, in particular to an anti-scald 3D printing pen with a self-care function.

Background

The 3D printing pen is a very convenient 3D printing device, can carry out the preparation of product through melting linear printing consumptive material, and the consumptive material of molten state cools off fast in the air to reach the effect of remolding, but will melt the consumptive material, the temperature is very high, and the user touches the scald extremely easily, because this type of product children use more, must accomplish the safety protection effect, the scald preventing 3D printing pen with self-care function that the invention states can solve above-mentioned problem.

Disclosure of Invention

For solving the problem, this example has designed an scald preventing 3D printing pen with self-care function, including the handwriting and beat printer head, the bottom surface of handwriting has set firmly the heating head, the periphery of heating head is provided with the screw thread, it is equipped with opening fastening chamber up to be equipped with in the printer head, the inner wall in fastening chamber with heating head periphery can threaded connection, fastening chamber diapire has set firmly the locating piece, the locating piece with it has the printing tube that link up from top to bottom to beat printer head internal rigid embedding, heating chamber has been seted up in the heating head, heating chamber inner wall has set firmly the heater, be equipped with opening positioning chamber down in the heating head, the locating piece can insert positioning chamber, set up transport chamber in the handwriting, transport chamber with fixed the honeycomb duct that has between the positioning chamber, the honeycomb duct runs through the heater, the handwriting periphery is equipped with can prevent to scald and can be in the end of use automatic cutout clearance beat the protective machine of printer head bottom The pen comprises a protective mechanism, the protective mechanism comprises two bilaterally symmetrical closed covers, a hollow cover cavity with an opening facing the printing head is formed in the closed cover, the printing head can be wrapped in the hollow cover cavity when the closed cover is closed, a telescopic cavity with an opening facing the printing head is formed in the lower side of the hollow cover cavity, a cutting block is arranged on the inner wall of the telescopic cavity in a sliding mode, the left cutting block and the right cutting block can be abutted to each other, consumables located below a printing tube can be cut off during abutting, two bilaterally symmetrical fixed blocks are fixedly arranged on the periphery of a pen body, a rotating shaft is rotatably arranged on the front side face of each fixed block, a rotating block is fixedly arranged on the periphery of the rotating shaft, the rotating block is fixedly connected with the closed cover, a transmission connecting rod is fixedly arranged on the periphery of the rotating block, a cavity is formed in the transmission connecting rod, two bilaterally symmetrical lifting, the inner wall of the lifting cavity is provided with a lifting block in a vertical sliding mode, the side, close to the outside, of the lifting block is hinged to a driven connecting rod, and the driven connecting rod is hinged to the transmission connecting rod in the cavity.

Preferably, a feeding pipe is fixedly embedded in the inner wall of the upper side of the conveying cavity, the feeding pipe is communicated with the outside, a button cavity with an opening facing left is formed in the pen body, a button is arranged on the inner wall of the button cavity in a left-right sliding manner, a cross post is fixedly arranged on the right side face of the button, a reset spring is fixedly arranged between the right side face of the button and the right wall of the reset spring, a power cavity is formed in the right side of the button cavity in a communicated manner, a motor is fixedly arranged on the bottom wall of the power cavity, the top face of the motor is electrically connected with a control switch, an extending part on the right side of the cross post extends into the power cavity, a contact block is fixedly arranged on the right side face of the cross post and can be in contact with the control switch, the motor can be started when in contact with the control switch, a motor shaft is dynamically connected to the rear side face of the motor, the gear chamber is located carry the chamber rear side, the antetheca rotation in gear chamber is equipped with two bilateral symmetry's driven shaft, the periphery of driven shaft has set firmly driven gear, two driven gear intermeshing, the periphery of motor shaft has set firmly drive gear, drive gear with be located the left side driven gear meshes.

Preferably, the forward extending part of the driven shaft extends into the conveying cavity, a rotating disc is fixedly arranged on the periphery of the forward extending part of the driven shaft, eight elastic cavities which are symmetrical to each other with the center of the rotating disc are formed in the rotating disc, clamping blocks are arranged on the inner walls of the elastic cavities in a sliding mode and can be abutted to the consumable, and clamping springs are fixedly arranged between the side face, close to the driven shaft, of each clamping block and the side wall, close to the driven shaft, of each elastic cavity and close to the driven shaft.

Preferably, a lifting screw rod is rotatably arranged between the upper wall and the lower wall of the lifting cavity, the lifting screw rod penetrates through the lifting block and is in threaded connection with the inner wall of the lifting block, a jacking spring is fixedly arranged between the top surface of the lifting block and the top wall of the lifting cavity, a transmission cavity is formed in the upper side of the lifting cavity, a spline sleeve is rotatably arranged on the bottom wall of the transmission cavity, a spline shaft is fixedly arranged on the top surface of the lifting screw rod and penetrates through the spline sleeve and is rotatably connected with the top wall of the transmission cavity, the spline shaft is in splined connection with the spline sleeve, a rotating gear is fixedly arranged on the periphery of the spline sleeve, a fixed box is fixedly arranged on the periphery of the pen body, an annular cavity is formed in the fixed box, an annular inner toothed ring is rotatably arranged on the inner wall of the annular cavity, the annular cavity is communicated with the transmission cavity, and the extending, and with the meshing of ring gear in the annular is located the left side the upside in transmission chamber has been seted up and has been connected the chamber, the diapire rotation of connecting the chamber is equipped with vertical axis, the periphery of vertical axis has set firmly connecting gear, connect the chamber with the annular chamber intercommunication, connecting gear extension stretches into in the annular chamber, and with the meshing of ring gear in the annular, vertical axis upwards extension stretches into the button intracavity, and its top surface has set firmly the power gear, the solid embedding has the rack in the downside inner wall of button, the rack with the meshing of power gear.

Preferably, a telescopic spring is fixedly installed between the side face, far away from the bottom of the printing head, of the cutting block and the side wall, far away from the printing head, of the telescopic cavity.

Preferably, the front side in transport chamber is opened and is equipped with the rectangle chamber, the inner wall in rectangle chamber has set firmly the control electroplax, the heater with control electroplax electric connection, display screen and keypad have been embedded in the front side inner wall of the handwriting, the display screen with the keypad with control electroplax electric connection.

The invention has the beneficial effects that: the invention not only has the printing function of a 3D printing pen, but also can effectively prevent a user from being accidentally scalded by touching the closed sealing cover, and can automatically cut off the tail end of the consumable used for the last time when the consumable is closed, so that the consumable can be used more conveniently and more cleanly in the next using process, wherein the protection mechanism can start the printing function and can also expand the sealing cover to two sides only by pressing the button.

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 view of the overall structure of the present invention.

FIG. 2 is a schematic view showing the internal structure of a gear chamber in the present invention.

Fig. 3 is a schematic view of the internal structure of a rectangular chamber according to the present invention.

Fig. 4 is a schematic view of the position of the display screen and the keypad in the present invention.

Fig. 5 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 6 is an enlarged schematic view of the structure at B in fig. 1.

Fig. 7 is an enlarged schematic view of the structure at C in fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-7, 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 an anti-scald 3D printing pen with a self-care function, which comprises a pen body 19 and a printing head 36, wherein a heating head 41 is fixedly arranged on the bottom surface of the pen body 19, threads are arranged on the periphery of the heating head 41, a fastening cavity 40 with an upward opening is arranged in the printing head 36, the inner wall of the fastening cavity 40 can be in threaded connection with the periphery of the heating head 41, a positioning block 38 is fixedly arranged on the bottom wall of the fastening cavity 40, a printing pipe 37 which is vertically communicated is fixedly embedded in the positioning block 38 and the printing head 36, a heating cavity 43 is arranged in the heating head 41, a heater 42 is fixedly arranged on the inner wall of the heating cavity 43, a positioning cavity 39 with a downward opening is arranged in the heating head 41, the positioning block 38 can be inserted into the positioning cavity 39, a conveying cavity 25 is arranged in the pen body 19, a flow guide pipe 64 is fixedly embedded between the conveying cavity 25 and the positioning cavity 39, and the, the periphery of the pen body 19 is provided with a protection mechanism 101 which can prevent scalding and can automatically cut off and clean the bottom of the printing head 36 after use, the protection mechanism 101 comprises two bilateral symmetry closed covers 33, an opening facing the hollow cover cavity 34 of the printing head 36 is arranged in each closed cover 33, when the closed covers 33 are closed, the printing head 36 can be wrapped in the hollow cover cavity 34, the lower side of the hollow cover cavity 34 is provided with an opening facing the telescopic cavity 69 of the printing head 36, the inner wall of the telescopic cavity 69 is provided with cutting blocks 71 in a sliding manner, the left cutting block 71 and the right cutting block 71 can be mutually abutted, consumable materials 18 below the printing pipe 37 can be cut off during abutting, the periphery of the pen body 19 is fixedly provided with two bilateral symmetry fixed blocks 31, the front side surface of each fixed block 31 is provided with a rotating shaft 32 in a rotating manner, and the periphery of the rotating shaft 32 is fixedly provided with a rotating block, rotatory piece 44 with closing cap 33 fixed connection, the periphery of rotatory piece 44 has set firmly drive connecting rod 30, cavity 29 has been seted up in the drive connecting rod 30, two bilateral symmetry and opening lift chamber 26 outwards have been seted up in the handwriting 19, the inner wall of lift chamber 26 slides from top to bottom and is equipped with lift piece 28, lift piece 28 is close to the articulated driven connecting rod 45 that is equipped with of external side, driven connecting rod 45 with drive connecting rod 30 is in articulated in the cavity 29.

Beneficially, a feeding pipe 17 is fixedly embedded in an inner wall of an upper side of the conveying cavity 25, the feeding pipe 17 is communicated with the outside, a button cavity 13 with an opening facing to the left is formed in the pen body 19, a button 11 is arranged on an inner wall of the button cavity 13 in a left-right sliding manner, a cross post 21 is fixedly arranged on a right side surface of the button 11, a return spring 12 is fixedly arranged between the right side surface of the button 11 and a right wall of the return spring 12, a power cavity 15 is communicated with the right side of the button cavity 13, a motor 20 is fixedly arranged on a bottom wall of the power cavity 15, a control switch 16 is electrically connected to a top surface of the motor 20, a right extending portion of the cross post 21 extends into the power cavity 15, a contact block 14 is fixedly arranged on the right side surface of the cross post, the contact block 14 can be in contact with the control switch 16, the motor 20 can be started when the contact block 14 is in contact with the control switch 16, and a, a gear cavity 47 is formed in the rear side of the power cavity 15, the gear cavity 47 is located in the rear side of the conveying cavity 25, two driven shafts 51 which are bilaterally symmetrical are arranged on the front wall of the gear cavity 47 in a rotating mode, driven gears 50 are fixedly arranged on the peripheries of the driven shafts 51, the two driven gears 50 are meshed with each other, a transmission gear 49 is fixedly arranged on the periphery of the motor shaft 48, the transmission gear 49 is meshed with the driven gear 50 located on the left side, when printing is needed, the button 11 can be moved rightwards by manually pressing the button 11, meanwhile, the cross column 21 can drive the contact block 14 to move rightwards to contact the control switch 16, so that the motor 20 can be started, at the moment, the motor shaft 48 can drive the transmission gear 49 to rotate, so that the two driven shafts 51 can rotate in opposite directions, and the driven shaft 51 located on the left side rotates clockwise, the driven shaft 51 rotates counterclockwise on the right side.

Advantageously, the forward extending portion of the driven shaft 51 extends into the conveying cavity 25, a rotating disc 66 is fixedly arranged on the outer periphery of the forward extending portion, eight elastic cavities 67 symmetrical to the center of the rotating disc 66 are formed in the rotating disc 66, clamping blocks 65 are slidably arranged on the inner walls of the elastic cavities 67, the clamping blocks 65 can abut against the consumable 18, clamping springs 68 are fixedly arranged between the side surfaces of the clamping blocks 65 close to the driven shaft 51 and the side walls of the elastic cavities 67 close to the driven shaft 51, when the consumable 18 is manually added into the conveying cavity 25 through the feeding pipe 17, the clamping blocks 65 can drive the consumable 18 to be conveyed downwards through the rotation of the two driven shafts 51, and the consumable 18 can be output to the outside after being heated and melted through the diversion pipe 64 and the printing pipe 37.

Beneficially, a lifting screw 27 is rotatably disposed between the upper wall and the lower wall of the lifting cavity 26, the lifting screw 27 penetrates through the lifting block 28 and is in threaded connection with the inner wall of the lifting block 28, a jacking spring 46 is fixedly mounted between the top surface of the lifting block 28 and the top wall of the lifting cavity 26, a transmission cavity 61 is disposed at the upper side of the lifting cavity 26, a spline housing 72 is rotatably disposed at the bottom wall of the transmission cavity 61, a spline shaft 63 is fixedly disposed at the top surface of the lifting screw 27, the spline shaft 63 penetrates through the spline housing 72 and is rotatably connected with the top wall of the transmission cavity 61, the spline shaft 63 is in splined connection with the spline housing 72, a rotating gear 62 is fixedly disposed at the outer periphery of the spline housing 72, a fixed box 56 is fixedly disposed at the outer periphery of the pen body 19, an annular cavity 60 is disposed in the fixed box 56, an annular inner gear ring 58 is rotatably disposed at the inner wall of the annular cavity 60, and, the extension part of the rotating gear 62 extends into the annular cavity 60 and is meshed with the annular inner gear ring 58, a connecting cavity 57 is arranged on the upper side of the transmission cavity 61 on the left side, a vertical shaft 24 is rotatably arranged on the bottom wall of the connecting cavity 57, a connecting gear 59 is fixedly arranged on the periphery of the vertical shaft 24, the connecting cavity 57 is communicated with the annular cavity 60, the extension part of the connecting gear 59 extends into the annular cavity 60 and is meshed with the annular inner gear ring 58, the upward extension part of the vertical shaft 24 extends into the button cavity 13, a power gear 23 is fixedly arranged on the top surface of the vertical shaft 24, a rack 22 is fixedly embedded in the inner wall of the lower side of the button 11, the rack 22 is meshed with the power gear 23, when the button 11 is pressed towards the right side, the rack 22 can drive the vertical shaft 24 to rotate, so that the connecting gear 59 can drive the annular inner gear ring 58 to rotate, further, the spline housing 72 can be driven by the rotary gear 62 to rotate, the lifting screw 27 can be driven by the spline shaft 63 to rotate, the lifting block 28 can be lifted at the moment, the driven connecting rod 45 can be driven to pull the transmission connecting rod 30 to rotate, the closed cover 33 can be driven by the rotary block 44 to be unfolded towards two sides, the printing head 36 can normally output the consumable 18 in a molten state to print, when the button 11 is released, the closed cover 33 can be reset and closed through the jacking spring 46, and a user can be prevented from being accidentally contacted with the printing head 36 to scald.

Advantageously, a telescopic spring 70 is fixedly mounted between the side of the cutting block 71 away from the bottom of the print head 36 and the side wall of the telescopic cavity 69 away from the print head 36, and the two cutting blocks 71 can be abutted against each other through the telescopic spring 70 to achieve the cutting effect.

Beneficially, a rectangular cavity 52 is formed in the front side of the conveying cavity 25, a control electric plate 53 is fixedly arranged on the inner wall of the rectangular cavity 52, the heater 42 is electrically connected with the control electric plate 53, a display screen 54 and a key plate 55 are fixedly embedded in the inner wall of the front side of the pen body 19, the display screen 54 and the key plate 55 are electrically connected with the control electric plate 53, the heating temperature can be controlled through the key plate 55 and the control electric plate 53, and the temperature condition can be displayed through the display screen 54.

The following describes in detail the usage steps of the scald preventing 3D printing pen with self-care function with reference to fig. 1 to 7:

in the initial state, the two contact blocks 73 are in contact with each other, the closing cover 33 is in the closed state, and the contact block 14 is not in contact with the control switch 16.

When printing is needed, the button 11 is manually pressed rightwards, the button 11 can be moved rightwards, the cross column 21 can drive the contact block 14 to move rightwards to move towards the contact control switch 16, so that the motor 20 can be started, at the moment, the motor shaft 48 can drive the transmission gear 49 to rotate, so that the two driven shafts 51 can rotate towards opposite directions, the driven shaft 51 positioned on the left side can rotate clockwise, the driven shaft 51 positioned on the right side can rotate anticlockwise, when the consumable 18 is manually added into the conveying cavity 25 through the feeding pipe 17, the consumable 18 can be driven to be conveyed downwards by the clamping block 65 through the rotation of the two driven shafts 51, so that the consumable 18 can be heated and melted through the guide pipe 64 and the printing pipe 37 and then output to the outside, when the button 11 is pressed rightwards, the rack 22 can drive the vertical shaft 24 to rotate, so that the connecting gear 59 can drive the annular inner toothed ring 58 to rotate, and further the rotary gear 62 can drive the, the spline shaft 63 can drive the lifting screw 27 to rotate, the lifting block 28 can be lifted at the moment, so that the driven connecting rod 45 can pull the transmission connecting rod 30 to rotate, the rotating block 44 can drive the closed cover 33 to expand towards two sides, the printing head 36 can normally output consumable 18 in a molten state to print, when the button 11 is released, the closed cover 33 can be reset and closed through the jacking spring 46, a user can be prevented from being scalded by accidentally contacting the printing head 36, the two cutting blocks 71 can be mutually abutted through the telescopic spring 70 to achieve a cutting effect, the heating temperature can be controlled through the key board 55 and the control electric board 53, and the temperature condition can be displayed through the display screen 54.

The invention has the beneficial effects that: the invention not only has the printing function of a 3D printing pen, but also can effectively prevent a user from being accidentally scalded by touching the closed sealing cover, and can automatically cut off the tail end of the consumable used for the last time when the consumable is closed, so that the consumable can be used more conveniently and more cleanly in the next using process, wherein the protection mechanism can start the printing function and can also expand the sealing cover to two sides only by pressing the button.

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.